Biomass pellet fuel forming mold

Abstract

The utility model discloses a biomass pellet fuel forming die which comprises an inner ring die and an outer ring die, feeding holes are evenly formed in the inner ring die, forming holes corresponding to the feeding holes are evenly formed in the outer ring die, the feeding holes are conical holes with large openings facing inwards, the forming holes are cylindrical holes with equal diameters, and the diameter of the forming holes is larger than that of the inner ring die. The ends, deviating from the inner wall of the inner ring mold, of the feeding holes and the forming holes are obliquely arranged in the rotating advancing direction of the pressing rollers in the inner ring mold. The die hole is designed into the conical feeding hole and the cylindrical forming hole, the conical hole is beneficial for biomass powder raw materials to enter the die hole, and the ends, deviating from the inner wall of the inner ring die, of the feeding hole and the forming hole are obliquely arranged in the rotation advancing direction of a compression roller in the inner ring die and form acute angles with the inner wall of the inner ring die; biomass powder raw materials enter the die holes more smoothly, so that the granulation efficiency is improved; and on the premise that the wall thickness of the inner ring mold and the outer ring mold is limited, the length of the mold holes is increased, so that the compactness of the prepared biomass pellet fuel is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of biomass pellet machines, in particular to a biomass pellet fuel forming die. Background Art

[0002] The biomass pellet machine is the main process equipment for biomass pellet fuel molding. The biomass powder raw material is squeezed out through the die by the pressing roller of the biomass pellet machine, and cut by the cutter to complete the pelletizing process of the biomass pellet fuel. Among them, the ring die is an important component of pelletizing. The biomass pellet powder raw material can only be formed after being extruded through the die hole. The die holes on the existing ring die are all set radially. When the pressing roller rotates to extrude the biomass powder raw material, it is relatively difficult for the biomass powder raw material to enter the die hole. The die hole can only enter a little material for each rotation of the pressing roller, which limits the pelletizing efficiency of the biomass pellet machine. In order to further improve the efficiency on the basis of the existing biomass pellet machine, a new biomass pellet fuel molding die is designed and proposed. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a biomass pellet fuel forming die, which is used to further improve the efficiency on the basis of the existing biomass pellet machine.

[0004] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0005] A biomass pellet fuel forming die comprises an inner ring die and an outer ring die, wherein the outer ring die is movably sleeved on the outside of the inner ring die, and fixing plates are arranged above and below the inner ring die and the outer ring die, and the fixing plates are fixedly mounted on the top and bottom of the inner ring die and the outer ring die by fixing bolts;

[0006] The inner ring die is evenly provided with feed holes, and the outer ring die is evenly provided with forming holes corresponding to the feed holes. The feed holes are tapered holes with large mouths facing inward, and the forming holes are cylindrical holes of equal diameter. The feed holes and the forming holes are coaxially arranged, and the ends of the feed holes and the forming holes that are away from the inner wall of the inner ring die are inclined toward the direction in which the pressure roller inside the inner ring die rotates forward.

[0007] Preferably, the top and bottom of the outer ring mold are both provided with annular ridges, the opposing surfaces of the two fixed disks are provided with outer limit grooves corresponding to the positions of the annular ridges, and the opposing surfaces of the two fixed disks are provided with inner limit grooves for installing the inner ring mold at positions corresponding to the inner walls.

[0008] Preferably, the top and bottom of the inner ring mold and the top and bottom of the annular ridge away from the outer ring mold are provided with positioning thread sleeves, and the inner walls of the outer limit groove and the inner limit groove are provided with positioning grooves corresponding to the positioning thread sleeves.

[0009] Preferably, the fixed disk is provided with countersunk bolt holes, the fixing bolts pass through the countersunk bolt holes and are threadedly connected to the positioning threaded sleeve and the inner ring die, the annular convex rib and the outer ring die are of an integral structure, and the fixing bolts pass through the countersunk bolt holes and are threadedly connected to the positioning threaded sleeve, the annular convex rib and the outer ring die.

[0010] Preferably, the fixed disk is further provided with mounting holes for overall installation and fixation.

[0011] Preferably, a circle of reinforcing convex ribs is provided in the middle of the circumferential outer wall of the outer ring die, the reinforcing convex ribs and the outer ring die are of an integral structure, and the forming holes and the feeding holes are arranged above and below the reinforcing convex ribs.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1. By designing the die holes into two parts, namely a conical feeding hole and a cylindrical forming hole, the conical hole is beneficial for the biomass powder raw material to enter the die hole, and the ends of the feeding hole and the forming hole away from the inner wall of the inner ring die are inclined in the advancing direction of the pressing roller inside the inner ring die, forming an acute angle with the inner wall of the inner ring film, so that the biomass powder raw material enters the die hole more smoothly, improving the granulation efficiency.

[0014] 2. On the premise of the limited wall thickness of the inner ring die and the outer ring die, the inclined die holes increase the length of the die holes, thereby improving the compactness of the produced biomass pellet fuel, making it not easy to loosen during later transportation and storage, and improving the product quality.

[0015] 3. The inner ring die and the outer ring die together form a split ring die fixed by the fixed disk. Since the inner ring film is usually more easily damaged, the split ring die can be replaced separately when severely worn, with lower usage costs.

[0016] 4. A reinforcing convex rib is provided in the middle of the circumferential outer wall of the outer ring die to improve the structural strength of the ring die. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the front view of the utility model;

[0018] Figure 2 is the top view of the utility model;

[0019] Figure 3 is the top view cross-sectional view at the corresponding position of the feeding hole of the utility model;

[0020] Figure 4 is the front sectional view of the utility model;

[0021] Figure 5 is the utility model Figure 4 the enlarged view of the structure at A in

[0022] Figure 6 This is the front sectional view of the fixed disk of the present utility model;

[0023] Figure 7 This is the bottom view of the fixed disk of the present utility model.

[0024] In the figure: 1, inner ring die; 101, feed hole; 2, outer ring die; 201, forming hole; 202, annular convex rib; 203, reinforcing convex rib; 3, fixed disk; 301, outer limiting groove; 302, inner limiting groove; 303, positioning groove; 304, countersunk bolt hole; 305, mounting hole; 4, fixing bolt; 5, pressure roller; 6, positioning threaded sleeve. Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0026] As Figure 1-7 shown, the present utility model provides a technical solution: a biomass pellet fuel forming die, including an inner ring die 1 and an outer ring die 2. The outer ring die 2 is movably sleeved outside the inner ring die 1. Fixed disks 3 are arranged above and below both the inner ring die 1 and the outer ring die 2. The fixed disks 3 are fixedly installed on the top and bottom of the inner ring die 1 and the outer ring die 2 through fixing bolts 4. The fixed disks 3 are also provided with mounting holes 305 for overall installation and fixation;

[0027] Positioning threaded sleeves 6 are arranged at the top and bottom of the inner ring die 1 and at the top and bottom of the annular convex rib 202 facing away from the outer ring die 2. Positioning grooves 303 corresponding to the positioning threaded sleeves 6 are arranged on the inner walls of the outer limiting groove 301 and the inner limiting groove 302. Countersunk bolt holes 304 are arranged on the fixed disks 3. The fixing bolts 4 pass through the countersunk bolt holes 304 and are threadedly connected to the positioning threaded sleeves 6 and the inner ring die 1. The annular convex rib 202 and the outer ring die 2 are of an integral structure. The fixing bolts 4 pass through the countersunk bolt holes 304 and are threadedly connected to the positioning threaded sleeves 6, the annular convex rib 202, and the outer ring die 2;

[0028] Feed holes 101 are uniformly arranged on the inner ring die 1. Forming holes 201 corresponding to the feed holes 101 are uniformly arranged on the outer ring die 2. The feed holes 101 are tapered holes with large openings facing inwards. The forming holes 201 are equal-diameter cylindrical holes. The feed holes 101 and the forming holes 201 are coaxially arranged, and the ends of the feed holes 101 and the forming holes 201 facing away from the inner wall of the inner ring die 1 are inclined towards the direction in which the pressure roller 5 rotates and advances inside the inner ring die 1;

[0029] Annular ridges 202 are provided at both the top and bottom of the outer ring die 2. Outer limiting grooves 301 corresponding to the positions of the annular ridges 202 are provided on the opposite surfaces of the two fixing plates 3. Inner limiting grooves 302 for installing the inner ring die 1 are provided at the positions corresponding to the inner walls of the opposite surfaces of the two fixing plates 3. A reinforcing rib 203 is provided in the middle of the circumferential outer wall of the outer ring die 2. The reinforcing rib 203 and the outer ring die 2 are of an integral structure, and the forming holes 201 and the feeding holes 101 are provided above and below the reinforcing rib 203.

[0030] Working principle:

[0031] One ends of the feeding holes 101 and the forming holes 201, which are away from the inner wall of the inner ring die 1, are inclined in the advancing direction of the pressing roller 5 rotating into the inner ring die 1, forming an acute angle with the inner wall of the inner ring film. The tapered holes are beneficial for the biomass powder raw materials to enter the die holes. When the pressing roller 5 rotates to extrude the biomass powder raw materials, the biomass powder raw materials can enter the die holes more smoothly, improving the granulation efficiency. On the premise of the limited wall thickness of the inner ring die 1 and the outer ring die 2, the inclined die holes increase the length of the die holes, thereby improving the compactness of the produced biomass pellet fuel. The inner ring die 1 and the outer ring die 2 together form a split ring die under the fixation of the fixing plates 3 and can be replaced separately when severely worn. The reinforcing rib 203 is provided in the middle of the circumferential outer wall of the outer ring die 2 to improve the structural strength of the ring die.

[0032] It should be noted that in this text, terms such as "including", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device.

[0033] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A biomass pellet fuel forming die, characterized in that: It includes an inner ring die (1) and an outer ring die (2). The outer ring die (2) is movably sleeved outside the inner ring die (1). Fixed disks (3) are arranged above and below both the inner ring die (1) and the outer ring die (2). The fixed disks (3) are fixedly installed on the top and bottom of the inner ring die (1) and the outer ring die (2) through fixing bolts (4). Feeding holes (101) are evenly arranged on the inner ring die (1). Forming holes (201) corresponding to the feeding holes (101) are evenly arranged on the outer ring die (2). The feeding holes (101) are tapered holes with large openings facing inwards. The forming holes (201) are equal-diameter cylindrical holes. The feeding holes (101) and the forming holes (201) are coaxially arranged, and the ends of the feeding holes (101) and the forming holes (201) facing away from the inner wall of the inner ring die (1) are inclined in the advancing direction of the pressing roller (5) inside the inner ring die (1).

2. The biomass pellet fuel forming die according to claim 1, characterized in that: Annular ridges (202) are arranged on both the top and bottom of the outer ring die (2). Outer limiting grooves (301) corresponding to the positions of the annular ridges (202) are arranged on the opposite surfaces of the two fixed disks (3). Inner limiting grooves (302) for installing the inner ring die (1) are arranged at the positions corresponding to the inner walls of the opposite surfaces of the two fixed disks (3).

3. A biomass pellet fuel forming die according to claim 2, characterized in that: Positioning threaded sleeves (6) are arranged on the top and bottom of the inner ring die (1) and on the top and bottom of the annular ridges (202) facing away from the outer ring die (2). Positioning grooves (303) corresponding to the positioning threaded sleeves (6) are arranged on the inner walls of the outer limiting grooves (301) and the inner limiting grooves (302).

4. A biomass pellet fuel forming die according to claim 3, characterized in that: Counterbore bolt holes (304) are arranged on the fixed disks (3). The fixing bolts (4) pass through the counterbore bolt holes (304) and are threadedly connected to the positioning threaded sleeves (6) and the inner ring die (1). The annular ridges (202) and the outer ring die (2) are of an integral structure. The fixing bolts (4) pass through the counterbore bolt holes (304) and are threadedly connected to the positioning threaded sleeves (6), the annular ridges (202), and the outer ring die (2).

5. A biomass pellet fuel forming die according to claim 1, characterized in that: Mounting holes (305) for overall installation and fixation are also arranged on the fixed disks (3).

6. The biomass pellet fuel forming die according to claim 1, wherein: A circle of reinforcing ridges (203) is arranged in the middle of the circumferential outer wall of the outer ring die (2). The reinforcing ridges (203) and the outer ring die (2) are of an integral structure, and the forming holes (201) and the feeding holes (101) are arranged above and below the reinforcing ridges (203).

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