Circular mold and biomass fuel forming machine

Abstract

The utility model discloses a circular mould and a biomass fuel forming machine, and relates to the technical field of biomass fuel processing, the circular mould provided by the utility model comprises a circular mould body, mould holes are arranged along the circumferential direction of the circular mould body, and the mould holes penetrate through an outer ring and an inner ring of the circular mould body; mounting grooves corresponding to the mold holes in position are formed in the inner ring of the circular mold body; the detachable block is provided with a feeding hole used for conveying materials, the detachable block is embedded into the mounting groove, and the feeding hole is communicated with the die hole; and the fixing part is used for limiting and fixing the detachable block in the axial direction of the die hole. During maintenance and replacement, only the fixing part needs to be dismounted in the axial direction of the die hole, and maintenance operation is more convenient; and the whole circular mould does not need to be replaced, so that the production cost and the material waste are reduced, and the labor intensity of operators is relieved.

Description

Technical Field

[0001] The utility model relates to the technical field of biomass fuel processing, in particular to a ring die and a biomass fuel forming machine. Background Art

[0002] A biomass fuel forming machine can compress biomass straws into solid block fuels, enabling the biomass straws to have high density, high calorific value and good combustion characteristics, and can replace traditional energy sources such as firewood, coal, liquefied gas and natural gas, and is widely used in fields such as household heating, hot water supply, industrial boilers and biomass power plants.

[0003] During the compression molding process of biomass raw materials, the materials enter the molding area from the feed inlet of the ring die for extrusion molding. Most of the existing ring dies in biomass fuel forming machines are of an integral structure. Therefore, under the long-term huge impact and alternating pressure, the ring die will be worn, especially near the feed inlet of the ring die, the wear is more serious. To solve this problem, the existing technology usually repairs and uses it by welding wear-resistant electrodes. However, the repair and replacement of the ring die are time-consuming and laborious, and also increase the labor intensity of the operators; moreover, after being repaired 3-5 times, the hardness and yield strength of the ring die become poor, greatly reducing the service life of the ring die, resulting in the ring die being unable to be used anymore, and the whole ring die needs to be replaced, which not only increases the production cost, but also causes waste of materials, further exacerbating the increase in cost.

[0004] Therefore, how to improve the convenience of ring die maintenance and reduce the replacement cost is a technical problem that needs to be solved by those skilled in the art at present. Content of the Utility Model

[0005] The purpose of the utility model is to provide a ring die and a biomass fuel forming machine, and the ring die provided by the utility model is used to improve the convenience of ring die maintenance and reduce the replacement cost.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A ring die, comprising:

[0008] A ring die body, in which die holes are arranged along the circumferential direction of the ring die body, the die holes penetrate through the outer ring and the inner ring of the ring die body, and an installation groove corresponding to the position of the die holes is arranged in the inner ring of the ring die body;

[0009] A detachable block, in which a feed hole for conveying materials is arranged, the detachable block is embedded in the installation groove, and the feed hole is communicated with the die hole;

[0010] A fixing member, which is used to limit and fix the detachable block along the axial direction of the die hole.

[0011] In the case of adopting the above technical solution, the material located in the inner ring of the ring die body enters the die hole through the feeding hole of the detachable block for extrusion molding. The detachable block is installed on the ring die body through the installation groove, and the detachable block is limited and fixed along the axial direction of the die hole by the fixing component, preventing the detachable block from falling out of the installation groove, ensuring the stability of the installation of the detachable block. Thus, a detachable connection mode is formed between the detachable block and the ring die body. Furthermore, when the detachable block is damaged under long-term huge impact and alternating pressure, the detachable block can be directly detached from the ring die body through the fixing component for replacement and maintenance. Compared with the structure in the prior art, the detachable block of the ring die body provided by the present utility model is a split detachable structure. During maintenance and replacement, only the fixing component located in the inner ring of the ring die body needs to be removed axially along the die hole, and the detachable block can be detached from the ring die body. The disassembly position and disassembly direction of the fixing component are relatively single, without the need to frequently change the disassembly action and disassembly direction. While realizing the convenience of disassembly and assembly for the staff, there is no need to replace the entire ring die, which not only reduces the production cost and material waste, but also reduces the labor intensity of the operators.

[0012] Optionally, in the above ring die, a fixing groove is jointly opened at the position where the ring die body is adjacent to the detachable block, and a fixing hole extending along the axial direction of the die hole is opened at the part of the ring die body located in the fixing groove; the axial direction of the die hole is the central axis direction penetrating through the die hole.

[0013] The fixing component includes a fastener, and the detachable block is fixed to the ring die body by the cooperation of the fastener and the fixing hole. Preferably, the fastener is a nut and a bolt, and the diameter of the nut is larger than the cross-sectional diameter of the bolt. When the bolt is installed in the fixing hole 141, the nut presses on the detachable block 120 and the ring die body 100 to realize the installation and fixation of the detachable block 120. In this way, the detachable block is installed and fixed in the installation groove through the fastener and the fixing hole. The overall structure of the fixing component is simple and reliable, further improving the convenience of disassembly and assembly of the detachable block and improving the work efficiency.

[0014] Optionally, in the above ring die, the fixing groove is jointly opened at the adjacent positions of the ring die body and two adjacent detachable blocks. In this way, two adjacent detachable blocks can be simultaneously limited and fixed on the ring die body through a set of fixing holes and fasteners, significantly reducing the number of fixing grooves, fixing holes and fasteners, significantly reducing the number of required components, making the overall structure more concise and convenient for maintenance, and reducing the manufacturing cost.

[0015] Optionally, in the above-mentioned ring die, the cross-sectional shape of the fixing groove is circular, oval or polygonal; and / or, the depth of the fixing groove is greater than or equal to the length of the part of the fastener that does not extend into the fixing hole. In this way, the cross-sectional shape of the fixing groove can be circular, rectangular, etc., as long as the nut can be placed in it, and the cross-sectional shape of the fixing groove is not specifically limited. The depth of the fixing groove is determined according to the axial thickness of the nut, and the depth of the fixing groove is greater than or equal to the nut, so as to completely sink the nut into the fixing groove and avoid interference between the inner wall surface of the protruding ring die body and the pressure roller in the inner ring of the ring die body.

[0016] Optionally, in the above-mentioned ring die, the ring die body is composed of a plurality of modules combined in the circumferential direction. One end of the module close to the inner ring of the ring die body is provided with a partition board, and an installation groove is formed between two adjacent partition boards. A part of the die hole is opened on one of the two adjacent modules, and the other part of the die hole is opened on the other of the two adjacent modules. In this way, the ring die body is assembled by combining a plurality of modules, which further reduces the production and processing difficulty and cost of the ring die body, improves the disassembly and assembly convenience of the ring die body, and a partition board is provided on the module. Two adjacent partition boards and modules among two adjacent modules form an installation groove. While satisfying the splicing and combination of a plurality of modules into a ring die body, the installation and fixation between the detachable block and the module are realized.

[0017] Optionally, in the above-mentioned ring die, along the circumferential direction of the ring die body, positioning steps are provided on both sides of the detachable block. The positioning steps are in contact with the partition board along the axial direction of the die hole, and the positioning steps of two adjacent detachable blocks and the side surface of the detachable block where the positioning steps are located enclose a receiving groove, and the partition board is embedded in the receiving groove. In this way, during the installation of the detachable block, the cooperation between the partition board and the positioning step not only plays a role in positioning the detachable block, making the installation between the detachable block and the module fast and improving the installation accuracy, but also the partition board is embedded in the receiving groove, so that one end of two adjacent detachable blocks located in the inner ring of the ring die body can be closely attached, ensuring good close adhesion between two adjacent modules and two adjacent detachable blocks, further enhancing the stability of the overall structure, and at the same time avoiding the material in the inner ring from being squeezed into the gaps between the components.

[0018] Optionally, in the above-mentioned ring die, the inner wall of the material inlet hole is smoothly connected to the inner wall of the die hole. In this way, the smoothness of the material passing through the detachable block into the die hole is improved, which is beneficial to improving the working efficiency of the briquetting and discharging.

[0019] Optionally, in the above ring die, the side of the detachable block close to the inner ring of the ring die body is recessed outward in the direction of the outer ring to form a recessed portion, and a plurality of the recessed portions together form an annular groove. In this way, along the circumferential direction of the ring die body, an annular groove is formed on the wall surface of the inner ring of the ring die body. During the extrusion process of the material, the material in the inner ring is first extruded into the annular groove on the inner wall, which plays a role in preliminary compression. The material preliminarily compressed in the annular groove is then extruded into the die holes through the detachable block, which not only improves the production efficiency but also helps to improve the compactness of the biomass briquette.

[0020] Optionally, in the above ring die, multiple sets of die holes are arranged along the axis direction of the ring die body. Each set of die holes has a plurality of the die holes arranged in the circumferential direction, and each die hole corresponds to and matches a detachable block. In this way, by setting multiple layers of die hole sets, the production efficiency of the biomass briquette can be significantly improved.

[0021] Optionally, in the above ring die, the die holes in any two adjacent sets of die holes are arranged staggered in the circumferential direction of the ring die body. In this way, during the extrusion process of the material in the inner ring of the ring die body, compared with the die holes arranged vertically corresponding to each other, the staggered die holes can improve the uniformity of the force on the entire ring die body, thereby reducing the impact force and alternating pressure suffered by each module and the detachable block, and thus being beneficial to improving the service life of the detachable block and the module.

[0022] A biomass fuel forming machine includes a ring die, and the ring die is the ring die as described in any one of the above.

[0023] The biomass fuel forming machine provided by the present invention has all the technical effects of the above ring die due to having the above ring die, and will not be elaborated herein again. Description of the Drawings

[0024] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0025] Figure 1 It is a schematic structural diagram of the ring die body disclosed in the embodiment of the present invention;

[0026] Figure 2 It is a schematic structural diagram of the detachable block disclosed in the embodiment of the present invention;

[0027] Figure 3 It is a schematic structural diagram of the module disclosed in the embodiment of the present invention;

[0028] Figure 4This is a schematic structural diagram of a biomass fuel forming machine disclosed in an embodiment of the present utility model.

[0029] Reference numerals:

[0030] 100 is a ring die body, 110 is a die hole, 120 is a detachable block, 121 is a positioning step, 122 is a recessed part, 130 is a mounting groove, 140 is a fixing groove, 141 is a fixing hole, 150 is a module, 151 is a partition plate, 152 is an axial fixing hole;

[0031] 10 is a driving motor, 20 is a pressing roller, 21 is a pressing roller bracket, 22 is a pressing roller shaft, 30 is a main shaft, 40 is a speed reducer, 50 is a frame, 60 is a base, 70 is an upper pressing plate, 80 is a feeding protective cover. Detailed implementation manners

[0032] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0033] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0034] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more, unless otherwise specifically defined. "Several" means one or more, unless otherwise specifically defined.

[0035] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model.

[0036] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" 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 an indirect connection through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0037] The core of the present utility model is to provide a ring die for improving the convenience of ring die maintenance and reducing replacement costs;

[0038] Another core of the present utility model is to provide a biomass fuel briquetting machine having the above ring die.

[0039] As Figure 1 and Figure 3 shown, an embodiment of the present utility model discloses a ring die, which includes an annular ring die body 100, a detachable block 120, and a fixing member. Among them, die holes 110 are arranged along the circumferential direction of the ring die body 100, and a detachable block 120 is installed on the ring die body 100 by being embedded in an installation groove 130, and a detachable block 120 corresponds to a die hole 110. The material inlet hole of the detachable block 120 is communicated with the die hole 110. That is, after the material enters the inner ring of the ring die body 100, it then enters the die hole 110 through the material inlet hole of the detachable block 120 for briquetting. And the fixing member located on the inner ring of the ring die body 100 limits and fixes the detachable block 120 along the axial direction of the die hole 110. The direction from the feed port to the discharge port of the die hole 110 is the axial direction of the die hole 110. Thus, during the material extrusion process, the detachable block 120 is prevented from falling out of the installation groove 130, ensuring the stability of the installation of the detachable block 120, and realizing a detachable structure in which the detachable block 120 and the ring die body 100 are separated. Therefore, when the detachable block 120 is damaged under long-term huge impact and alternating pressure, the detachable block 120 can be directly disassembled from the installation groove 130 of the ring die body 100 for replacement and maintenance, without replacing and maintaining the entire ring die body 100, significantly improving the maintenance work efficiency, reducing material waste and production costs, and reducing the labor intensity of operators. And only by removing the fixing member located in the inner ring of the ring die body 100 along the axial direction of the die hole 110, the detachable block 120 can be disassembled from the ring die body 100, without the need to frequently change the disassembly actions and directions, making it more convenient for the staff to disassemble and assemble.

[0040] In a specific embodiment, a fixing groove 140 is jointly formed at the position where the ring die body 100 is adjacent to the detachable block 120, and a fixing hole 141 is formed at the bottom of the groove of the part of the fixing groove 140 located in the ring die body 100. The fixing member includes a fastener. After the fastener is installed into the fixing hole 141, it limits and fixes the ring die body 100 and the detachable block 120. At the same time, the fastener is located in the fixing groove 140, and being embedded in the fixing groove 140 avoids the interference between the fastener protruding from the inner wall surface of the ring die body 100 and the pressure roller 20 in the inner ring of the ring die body 100, and also improves the simplicity and aesthetics of the whole structure. In a specific embodiment, the fastener is a bolt, and the fixing hole 141 is a bolt hole that matches the bolt. The nut installed into the bolt hole abuts against the ring die body 100 and the detachable block 120 at the same time, realizing the limiting and fixing of the detachable block 120 on the ring die body 100.

[0041] As Figure 2 shown, a fixing groove 140 is jointly formed at the positions where the ring die body 100 is adjacent to two adjacent detachable blocks 120, that is, the fixing groove 140 is divided into three parts. The first part of the fixing groove 140 is formed on the ring die body 100, and the second and third parts of the fixing groove 140 are respectively formed on two adjacent detachable blocks 120. The fixing hole 141 is also formed in the part of the fixing groove 140 on the ring die body 100. After the fastener is installed into the fixing groove 140 through the fixing hole 141, the fastener abuts against the ring die body 100 and two adjacent detachable blocks 120 at the same time, limiting and fixing the two adjacent detachable blocks 120 to the ring die body 100. This fixing method significantly reduces the number of the fixing holes 141, fasteners and fixing grooves 140, reduces the number of overall parts, reduces the production and manufacturing cost, further improves the simplicity of the overall structure, further improves the disassembly and assembly convenience of the detachable block 120, and improves the working efficiency. Of course, fasteners with other structures can also be selected, as long as they can achieve the purpose of pressing and fastening. In addition, both the detachable block 120 and the die hole 110 provided in this embodiment are square holes. Therefore, in order to ensure the stability of the installation of the detachable block 120, fixing members are provided at the four corners of the detachable block 120 for limiting and fixing.

[0042] Exemplarily, the cross-sectional shape of the fixing groove 140 can be circular, rectangular, etc., as long as the nut can be placed in it. The cross-sectional shape of the fixing groove is not specifically limited. The depth of the fixing groove 140 is determined according to the axial thickness of the nut. The depth of the fixing groove 140 is greater than or equal to the nut, so as to facilitate the complete sinking of the nut into the fixing groove 140 and avoid the interference between the nut protruding from the inner wall surface of the ring die body 100 and the pressure roller 20 in the inner ring of the ring die body 100.

[0043] As Figure 1 、 Figure 2 and Figure 3As shown, the ring die body 100 is formed by combining multiple modules 150 in the circumferential direction. Along the circumferential direction of the ring die body 100, the ring die body 100 is formed by splicing multiple modules 150 together, which further reduces the production and processing difficulty and cost of the ring die body 100, improves the disassembly and assembly convenience of the ring die body 100, and increases the efficiency of maintenance work. A partition 151 is also provided between any two adjacent modules 150. The partition 151 is located at one end of the module 150 close to the inner ring of the ring die body 100. Therefore, after two adjacent modules 150 are spliced and combined, an installation groove 130 is formed around between the two adjacent partitions 151 and the modules 150. Furthermore, when multiple modules 150 are spliced and combined to form the ring die body 100, the installation and fixation between the detachable block 120 and the module 150 are realized.

[0044] In some embodiments, when the ring die body 100 is formed by combining multiple modules 150 in the circumferential direction, the die holes 110 are divided into two parts. The two parts of the die holes 110 are respectively formed on two adjacent modules 150 and are in a groove structure on the module 150. That is, after two adjacent modules 150 are spliced, the two groove structures are combined to form the die holes 110. In this way, the groove structure has a lower processing difficulty compared to the die hole structure, which can reduce the processing difficulty of the module 150.

[0045] As Figure 3 shown, along the circumferential direction of the ring die body 100, positioning steps 121 are provided on both outer sides of the detachable block 120. When any two adjacent modules 150 are combined, the positioning steps 121 of two adjacent detachable blocks 120 and the side surfaces of the detachable blocks 120 where the positioning steps 121 are located enclose a receiving groove, and the partition 151 is embedded in the receiving groove. The positioning steps 121 are in contact with the partition 151 along the axial direction of the die hole 110. Therefore, during the installation process of the detachable block 120, the cooperation between the partition 151 and the positioning steps 121 not only plays a role in positioning the detachable block 120, realizing rapid installation between the detachable block 120 and the module 150 and improving the installation accuracy, but also after two adjacent detachable blocks 120 are installed, the partition 151 is embedded in the receiving groove formed by the positioning steps 121 and the side surfaces where the positioning steps 121 are located of the detachable block 120, which can make one end of two adjacent detachable blocks 120 located in the inner ring of the ring die body 100 fit tightly, ensuring good fitting tightness between two adjacent modules 150 and two adjacent detachable blocks 120, further enhancing the stability of the overall structure, and at the same time avoiding the material in the inner ring from being squeezed into the gaps between components.

[0046] In addition, the radial cross-sectional shape of the feeding hole of the detachable block 120 is the same as that of the die hole 110, so that the inner wall of the feeding hole is smoothly connected to the inner wall of the die hole 110. During the material pressing process, the smoothness of the material entering the die hole 110 through the detachable block 120 is improved, which is conducive to improving the working efficiency of the briquette forming and discharging. Or the radial cross-sectional shape of the feeding hole of the detachable block 120 may also be different from that of the die hole 110, and only the smooth connection between the inner wall of the feeding hole and the inner wall of the die hole 110 needs to be realized. Those skilled in the art can design according to actual needs.

[0047] As Figure 2 shown, a recessed portion 122 is formed by the inner ring side of the detachable block 120 close to the ring die body 100 being recessed outward in the direction of the outer ring. Therefore, for the end faces of the detachable blocks 120 evenly spaced on the same circumference, along the circumferential direction of the ring die body 100, the recessed portions 122 cooperate with each other to jointly form a ring-shaped groove on the inner ring wall surface of the ring die body 100. During the extrusion of the material, the material in the inner ring is first extruded into the ring-shaped groove on the inner wall, playing a role of preliminary compression. Then, the material preliminarily compressed in the ring-shaped groove is extruded into the die hole 110 through the detachable block 120, which not only improves the production efficiency but also helps to improve the density of the biomass briquette.

[0048] In another specific embodiment, multiple sets of die holes are arranged along the axial direction of the ring die body 100. Each set of die holes includes multiple die holes 110 arranged in the circumferential direction, and one die hole 110 cooperates with one detachable block 120. The die holes 110 in each set of die holes are evenly spaced on the same circumference. By arranging multiple sets of die holes on the ring die body 100, without affecting the diameter size of the entire ring die body 100, the number of die holes 110 is significantly increased, and thus the production efficiency of the biomass briquette can be significantly improved.

[0049] As Figure 1 shown, the die holes 110 in any two sets of die holes are arranged staggeredly in the circumferential direction of the ring die body 100. For the ring die body 100 with the die holes 110 arranged staggeredly provided in this embodiment, compared with the die holes 110 arranged corresponding to each other up and down on the same axis, the staggeredly arranged die holes 110 can improve the uniformity of the force on the entire ring die body 100 during the material extrusion process, thereby reducing the impact force and alternating pressure suffered by each module 150 and the detachable block 120, which is conducive to improving the service life of the detachable block 120 and the module 150.

[0050] As Figure 4As shown in the figure, the present utility model also discloses a biomass fuel briquetting machine, which includes a driving motor 10, a pressing roller 20, a pressing roller bracket 21, a pressing roller shaft 22, a main shaft 30, a feeding protective cover 80, and a ring die. Since this biomass fuel briquetting machine has the above-mentioned ring die, it has all the technical effects of the above-mentioned ring die, and will not be elaborated herein. Among them, multiple pressing rollers 20 are provided, and each pressing roller 20 is arranged in the inner ring of the ring die body 100. There is an extrusion gap between the circumferential surface of each pressing roller 20 and the inner wall of the inner ring of the ring die body 100, so that each pressing roller 20 can rotate smoothly in the inner ring of the ring die body 100. Each pressing roller 20 is rotatably connected to the pressing roller bracket 21 through the pressing roller shaft 22. The main shaft 30 is connected to the pressing roller bracket 21. The driving motor 10 drives the main shaft 30 to rotate around its own axis through a speed reducer 40. Along the axial direction of the ring die, axial fixing holes 152 are provided on the upper and lower end faces of the ring die block 150. Each ring die block 150 is respectively connected to the base 60 of the frame 50 and the upper pressing plate 70 through the axial fixing holes 152 and bolts, and the feeding protective cover 80 is installed on the ring die body 100 through the upper pressing plate 70.

[0051] In addition, along the direction from the feeding port of the feeding protective cover 80 to the ring die body 100, the aperture of the feeding protective cover 80 gradually increases, so that the diameter of the feeding port of the feeding protective cover 80 is smaller. During the process of feeding materials through the feeding port, if the feeding amount of materials is large, there will be more materials that cannot be extruded into blocks in time, resulting in excessive accumulation of materials in the extrusion working area between the pressing roller 20 and the ring die body 100, thus affecting the extrusion work. Therefore, the aperture of the feeding port in the feeding protective cover 80 is smaller, preventing a large amount of materials from being fed during feeding. And the aperture size near the inner ring of the ring die body 100 is larger, having a larger material buffer space, reducing the adverse impact of material accumulation on the extrusion work.

[0052] In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in a suitable manner in any one or more embodiments or examples.

[0053] The above is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model can easily think of changes or substitutions, which should all be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claimed rights.

Claims

1. A ring die, characterized in that: include: A ring die body, wherein die holes are arranged along the circumferential direction of the ring die body, the die holes penetrate the outer ring and the inner ring of the ring die body, and the inner ring of the ring die body is provided with mounting grooves corresponding to the positions of the die holes; A detachable block is provided with a material feeding hole for feeding materials, the detachable block is embedded in the mounting groove, and the material feeding hole is connected with the die hole; A fixing component is used to limit and fix the detachable block along the axial direction of the die hole.

2. The ring die according to claim 1, characterized in that: A fixing groove is formed at a position where the ring die body and the detachable block are adjacent to each other, and a fixing hole extending along the axial direction of the die hole is formed at a position of the ring die body located at the fixing groove; The fixing component includes a fastener, and the detachable block is fixed to the ring die body by the fastener cooperating with the fixing hole.

3. The ring die according to claim 2, characterized in that: The fixing groove is formed by the ring die body and the grooves opened at the adjacent positions of the two adjacent detachable blocks.

4. The ring die according to claim 2, characterized in that: The depth of the fixing groove is greater than or equal to the length of the portion of the fastener that does not extend into the fixing hole; and / or the cross-sectional shape of the fixing groove is circular, elliptical or polygonal.

5. The ring die according to claim 1, characterized in that: The ring die body is composed of a plurality of modules spliced ​​and assembled along the circumferential direction. A partition is arranged at one end of each module close to the inner circle of the ring die body, and the mounting groove is formed between two adjacent partitions.

6. The ring die according to claim 5, characterized in that: Along the circumferential direction of the ring mold body, positioning steps are arranged on both side surfaces of the detachable block, and the positioning steps are abutted against the partition along the axial direction of the mold hole, and the two positioning steps on the adjacent sides of the two detachable blocks and the side surfaces of the detachable blocks where the positioning steps are located form a receiving groove, and the partition is embedded in the receiving groove.

7. The ring die according to claim 1, characterized in that: The inner wall of the feed hole is smoothly connected to the inner wall of the die hole.

8. The ring die according to claim 1, characterized in that: The inner ring side of the detachable block close to the ring die body is recessed toward the outer ring to form a recessed portion, and a plurality of recessed portions together form an annular groove.

9. The ring die according to any one of claims 1 to 8, characterized in that: A plurality of circles of die hole groups are arranged along the axial direction of the ring die body, each circle of die hole groups has a plurality of die holes arranged along the circumferential direction, and each of the die holes corresponds to and matches one of the detachable blocks.

10. The ring die according to claim 9, characterized in that: The die holes in any two adjacent circles of the die hole groups are arranged alternately in the circumferential direction of the ring die body.

11. A biomass fuel molding machine, characterized in that: The invention comprises a ring mold, and the ring mold is the ring mold as described in any one of claims 1 to 10.

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