Granule size adjustable ring die granulator and grain size adjusting method

Abstract

The invention relates to the technical field of ring die granulation, in particular to a particle size adjustable ring die granulator and a particle size adjusting method.The particle size adjustable ring die granulator comprises a truss and a protection box fixedly installed on the truss, a cover plate is rotationally installed on the protection box, and a conveying pipe is fixed to the cover plate; the outer ring mold is rotationally mounted on the side wall of the protection box, and a plurality of granulation holes which are circumferentially distributed at equal intervals are formed in the circumferential outer wall of the outer ring mold; the mixing and conveying mechanism is arranged on the protection box and is communicated and matched with the conveying pipe; the granulation mechanism is arranged in the protection box and connected with the outer ring mold, and the granulation mechanism is connected with compression rollers which are symmetrically arranged; and the cutting mechanism is arranged in the protection box and connected with the granulating mechanism, cutting knives which are symmetrically arranged are connected to the cutting mechanism, and a centrifugal regulation and control mechanism connected with the cutting mechanism is further arranged in the protection box. Therefore, the granulating size is always kept within a certain range.

Description

Technical Field

[0001] The invention relates to the technical field of ring die granulation, in particular to a ring die granulator with adjustable particle size and a particle size adjustment method. Background Art

[0002] The ring die pelletizer uses roller extrusion and continuously extrudes through the die holes to form columnar particles. The particles rotate with the die ring and are cut into finished products of a certain length by a cutter fixed on the outside of the die.

[0003] When granulating raw materials, the length of pellets is an important quality evaluation index. The factors that affect the pellets are mainly the following: the influence of ring die speed and rotation speed. The particle size and ring die speed are inversely proportional to the particle length. When the output is certain, if the ring die speed is faster, the transient time of the generated particles is shorter, and the particle length is smaller. On the other hand, if the ring die speed is slower, the transient time of the generated particles is longer, and the particle length is larger. The influence of ring die aperture and opening rate. The larger the aperture and the more openings, the smaller the particles. The influence of ring die inner diameter, effective ring die width and particle density on particle size. The density is related to the granulation raw material and the ring die compression rate, but the particle density is not much different. For the same granulation raw material, the larger the particle size, the shorter the particle length.

[0004] Since the raw material density and ring die shape are basically adjusted before production, they will not affect the production process. If the ring die speed needs to be adjusted, the machine needs to be stopped to adjust the position of the cutting knife to ensure that the size of the product remains within a certain range, which affects the production efficiency and also causes problems such as uneven product size and poor product quality. Summary of the invention

[0005] The object of the present invention is to provide a ring die pelletizing machine with adjustable particle size and a particle size adjustment method to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A particle size adjustable ring die pelletizer, comprising:

[0008] A truss, and a protection box fixedly mounted on the truss, a cover plate rotatably mounted on the protection box, and a conveying pipe fixed on the cover plate;

[0009] Also includes:

[0010] An outer ring die is rotatably mounted on the side wall of the protection box, and a plurality of granulation holes equidistantly distributed in a circumference are opened on the circumferential outer wall of the outer ring die;

[0011] A mixing and conveying mechanism, which is arranged on the protection box and is in communication with the conveying pipe, and is used to mix the materials and convey them into the outer ring mold through the conveying pipe;

[0012] A granulating mechanism is arranged in the protective box and connected to the outer ring die, the granulating mechanism is connected to symmetrically arranged pressing rollers, and the granulating mechanism can drive the outer ring die and the pressing rollers to rotate synchronously;

[0013] A cutting mechanism is arranged in the protective box and connected to the granulating mechanism. The cutting mechanism is connected to symmetrically arranged cutting knives. A centrifugal regulating mechanism connected to the cutting mechanism is also arranged in the protective box. The cutting mechanism can operate when the granulating mechanism moves, and the distance between the cutting knife and the outer ring mold can be adjusted by the centrifugal regulating mechanism.

[0014] As a further solution of the present invention: the mixing and conveying mechanism includes a modulator fixedly mounted on the protective box and communicated with the conveying pipe, a feeder is fixed on the top of the modulator, a first motor is fixed on the modulator, a spiral dragon connected to the output shaft of the first motor is rotatably mounted in the feeder, and a stirring assembly is arranged in the modulator.

[0015] As a further solution of the present invention: the stirring assembly includes a second motor fixedly mounted on the side wall of the modulator, a transmission rod connected to the output shaft of the second motor is rotatably mounted on the modulator, and a plurality of stirring blades equidistantly distributed are fixedly mounted on the transmission rod.

[0016] As a further solution of the present invention: the granulating mechanism comprises a first rotating rod rotatably mounted on the protective box, the first rotating rod is fixedly connected to the outer ring die, a fixed rod penetrating the outer ring die is fixed in the protective box, and a separating ring rotatably sealed and connected to the outer ring die is fixed at the end of the fixed rod;

[0017] It also includes a second rotating rod rotatably mounted on the separation ring and symmetrically arranged, the second rotating rod is fixedly connected to the pressure roller, and a belt connected to the first rotating rod is sleeved on the second rotating rod.

[0018] As a further solution of the present invention: the cutting mechanism includes a movable sleeve slidably mounted on the first rotating rod, a limiting groove is provided on the inner wall of the movable sleeve, a limiting rod slidably connected to the limiting groove is fixed on the first rotating rod, and a supporting assembly connected to the movable sleeve is fixed on the first rotating rod.

[0019] As a further solution of the present invention: the support assembly includes a movable plate rotatably mounted on the movable sleeve, the first rotating rod is sleeved with a spring abutting against the movable plate, symmetrical support rods are fixed to the movable plate, a support sleeve is slidably mounted on the support rods, and a sliding structure connected to the support sleeve is provided on the protective box.

[0020] As a further solution of the present invention: the sliding structure includes through grooves opened on the protective box and symmetrically arranged, a movable block is slidably installed in the through groove, the movable block is fixedly connected to the supporting sleeve, a support plate is fixed to the side wall of the movable block, and the support plate is fixedly connected to the cutting knife.

[0021] As a further solution of the present invention: the centrifugal control mechanism includes a fixed ring fixedly installed in the protective box, the fixed ring is provided with a tapered groove, and the movable sleeve is provided with a follower component connected to the tapered groove.

[0022] As a further solution of the present invention: the follower assembly includes a push plate fixedly installed on the movable sleeve, the push plate is provided with symmetrically arranged sliding grooves, a sliding block is slidably installed in the sliding groove, a limiting wheel is fixed on the side wall of the sliding block, and the limiting wheel is slidably connected to the conical groove.

[0023] A method for adjusting the particle size of a ring die pelletizer comprises the following steps:

[0024] Step 1: Put the raw materials to be granulated into the mixing and conveying mechanism, and mix the raw materials under the action of the mixing and conveying mechanism;

[0025] Step 2: After the mixing is completed, the raw materials will be transported to the outer ring die through the conveying pipe. At the same time, under the action of the granulating mechanism, the outer ring die and the pressure roller are driven to rotate synchronously to extrude the raw materials placed in the outer ring die through the granulating hole;

[0026] Step 3: Since the outer ring die is always rotating, the extruded raw material will be cut into the required size by the cutting knife, and then discharged through the cover plate;

[0027] Step 4: If the speed of the outer ring die and the pressure roller increases, the size of the raw material extruded through the granulation hole will be reduced accordingly. Under the action of the granulation mechanism, the centrifugal control mechanism will be synchronously operated, thereby reducing the distance between the cutting knife and the outer ring die to ensure that the cut raw material always remains within a certain size range;

[0028] Step 5: Similarly, if the speed decreases, the distance between the cutting knife and the outer ring die increases, thereby ensuring that the particle size remains within a certain range.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows: the present application can automatically adjust the distance between the cutting knife and the outer ring die according to the rotation speed of the outer ring die and the pressure roller to ensure that the granulation size is always kept within a certain range. Before granulation, the raw materials can be conveyed to the mixing and conveying mechanism. Under the action of the mixing and conveying mechanism, the raw materials are ensured to be evenly mixed and conveyed to the outer ring die through the conveying pipe. At this time, under the action of the granulation mechanism, the outer ring die and the pressure roller are controlled to rotate synchronously to extrude the raw materials in the outer ring die through the granulation hole. At the same time, under the action of the cutting knife, the extruded raw materials are evenly cut. If the rotation speed of the outer ring die and the pressure roller changes, the length of the raw materials extruded through the granulation hole will change accordingly. At this time, the granulation mechanism will control the movement of the cutting mechanism through the centrifugal control mechanism, so that the distance between the cutting knife and the outer ring die is adaptively adjusted, thereby ensuring that the particle size of the product is always kept within a certain range. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 The figure is a schematic structural diagram of an embodiment of a ring die pelletizing machine with adjustable particle size.

[0031] Figure 2 This is a structural schematic diagram from another angle of an embodiment of the particle size adjustable ring die pelletizer.

[0032] Figure 3 This is a schematic diagram of the structure of a partial mixing and conveying mechanism in an embodiment of a ring die granulator with adjustable particle size.

[0033] Figure 4 This is a schematic diagram of the structure of a partial mixing and conveying mechanism in an embodiment of a ring die granulator with adjustable particle size.

[0034] Figure 5 The figure is a schematic diagram of the structure of the granulating mechanism, the outer ring die, the cutting knife and the protective box in one embodiment of the ring die granulator with adjustable particle size.

[0035] Figure 6 It is a schematic diagram of a partially half-section structure of an embodiment of a ring die pelletizing machine with adjustable particle size.

[0036] Figure 7 for Figure 6 A schematic diagram of the enlarged structure at point A in the middle.

[0037] Figure 8 The figure is a schematic diagram of the connection relationship among the centrifugal control mechanism, the partial granulation mechanism and the cutting mechanism in one embodiment of the ring die granulator with adjustable particle size.

[0038] Fig. 9 It is a structural schematic diagram of a granulating mechanism, a part of a centrifugal regulating mechanism, and a part of a cutting mechanism in one embodiment of a ring die granulator with adjustable particle size.

[0039] Fig.10The figure is a schematic diagram of the exploded structure of the centrifugal control mechanism and part of the granulation mechanism in one embodiment of the ring die granulator with adjustable particle size.

[0040] Fig.11 The figure is a schematic diagram of the exploded structure of a part of the cutting mechanism in one embodiment of a ring die pelletizing machine with adjustable particle size.

[0041] In the figure: 1. truss; 2. protection box; 3. cover plate; 4. conveying pipe; 5. modulator; 6. feeder; 7. first motor; 8. spiral dragon; 9. second motor; 10. transmission rod; 11. stirring blade; 12. first rotating rod; 13. outer ring mold; 1301. granulation hole; 14. fixed rod; 15. separation ring; 16. belt; 17. second rotating rod; 18. pressure roller; 19. fixed ring; 1901. conical groove; 20. movable sleeve; 21. push plate; 2101. slide groove; 22. sliding block; 23. limiting wheel; 24. movable plate; 25. spring; 26. support rod; 27. support sleeve; 28. through groove; 29. ​​movable block; 30. support plate; 31. cutting knife. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0044] See also Figures 1 to 11 In an embodiment of the present invention, a ring die pelletizing machine with adjustable particle size comprises:

[0045] A truss 1, and a protection box 2 fixedly mounted on the truss 1, a cover plate 3 rotatably mounted on the protection box 2, and a conveying pipe 4 fixed on the cover plate 3;

[0046] Also includes:

[0047] The outer ring die 13 is rotatably mounted on the side wall of the protection box 2, and a plurality of granulation holes 1301 equidistantly distributed around the circumference are formed on the circumferential outer wall of the outer ring die 13;

[0048] Preferably, when granulating the raw material, the pellet length is an important quality evaluation index, and the factors affecting the pellets are mainly the following, including:

[0049] The influence of ring die speed and rotation speed, particle size, ring die speed and particle length are inversely proportional. When the output is constant, if the ring die speed is faster, the transient time of the generated particles is shorter, and the particle length is smaller. On the contrary, if the ring die speed is slower, the transient time of the generated particles is longer, and the particle length is larger. The influence of ring die aperture and opening rate, the larger the aperture and the more openings, the smaller the particles. The influence of ring die inner diameter, effective ring die width and particle density on particle size, the density is related to the granulation raw material and the ring die compression rate, but the particle density is not much different. For the same granulation raw material, the larger the particle size, the shorter the particle length. Since the raw material density and ring die morphology are basically adjusted before production, this application mainly improves the influence of ring die speed on particles to ensure that the particle size is always kept within a certain range at different ring die speeds.

[0050] Among them, the ring die pelletizer can be used for the production of feed, and can also be used for extrusion pelletizing of other materials, which is not limited in this application.

[0051] See also Figure 1-Figure 4 , a mixing and conveying mechanism is arranged on the protective box 2 and is connected and coordinated with the conveying pipe 4, and is used to mix the materials and convey them to the outer ring mold 13 through the conveying pipe 4. The mixing and conveying mechanism includes a modulator 5 fixedly mounted on the protective box 2 and connected and coordinated with the conveying pipe 4, a feeder 6 is fixed on the top of the modulator 5, a first motor 7 is fixed on the modulator 5, a spiral dragon 8 connected to the output shaft of the first motor 7 is rotatably installed in the feeder 6, and a stirring assembly is arranged in the modulator 5, wherein the stirring assembly includes a second motor 9 fixedly mounted on the side wall of the modulator 5, a transmission rod 10 connected to the output shaft of the second motor 9 is rotatably installed on the modulator 5, and a plurality of stirring blades 11 distributed equidistantly are fixedly installed on the transmission rod 10.

[0052] In detail, before granulating the raw materials, it is necessary to ensure that the raw materials are fully mixed to achieve the required quality for granulation. Therefore, before granulation, the cover plate 3 is first closed to make the conveying pipe 4 and the modulator 5 conductive and coordinated. The raw materials can be added into the feeder 6 according to the required proportion of the product. At this time, the first motor 7 works and conveys the raw materials to the modulator 5 through the spiral dragon 8. The spiral dragon 8 can also perform preliminary mixing of the raw materials during the conveying process. When the raw materials enter the modulator 5, the second motor 9 works and drives the transmission rod 10 to rotate, thereby driving the stirring blade 11 to rotate. Under the action of the stirring blade 11, the raw materials can be fully mixed.

[0053] Preferably, after the raw materials are mixed, they need to be transported to the delivery pipe 4. Therefore, an air supply pipe can be connected to the end of the modulator 5, and the air supply pipe is used to blow the raw materials to the direction of the delivery pipe 4. At the same time, under the action of gas circulation, the mixing of the raw materials is further accelerated. The mixed raw materials will be transported to the outer ring mold 13 through the delivery pipe 4, and the above steps are repeated to achieve the effect of continuous mixing and transportation.

[0054] See also Figure 5 , Figure 6 , Figure 8-Figure 10 , a granulating mechanism is arranged in the protective box 2 and connected to the outer ring mold 13, and a symmetrically arranged pressure roller 18 is connected to the granulating mechanism. The granulating mechanism can drive the outer ring mold 13 and the pressure roller 18 to rotate synchronously. The granulating mechanism includes a first rotating rod 12 rotatably mounted on the protective box 2, and the first rotating rod 12 is fixedly connected to the outer ring mold 13. A fixed rod 14 penetrating the outer ring mold 13 is fixed in the protective box 2, and a separating ring 15 rotatably sealed and connected to the outer ring mold 13 is fixed at the end of the fixed rod 14; it also includes a second rotating rod 17 rotatably mounted on the separating ring 15 and symmetrically arranged, and the second rotating rod 17 is fixedly connected to the pressure roller 18, and a belt 16 connected to the first rotating rod 12 is sleeved on the second rotating rod 17.

[0055] It should be noted that when granulating the raw materials, the pressing roller 18 and the outer ring die 13 need to be squeezed and cooperated with each other to extrude the raw materials placed in the outer ring die 13 through the granulation hole 1301. The separating ring 15 divides the outer ring die 13 into two spaces, which can ensure that the raw materials will not interfere with the belt 16, resulting in the inability to granulate the raw materials. When the raw materials need to be granulated, under the action of the modulator 5, the raw materials are transported to the outer ring die 13 through the conveying pipe 4. At this time, the first rotating rod 12 rotates and drives the outer ring die 13 to rotate. At the same time, the first rotating rod 12 will also drive the second rotating rod 17 to rotate through the belt 16 to ensure that the two pressing rollers 18 rotate synchronously. With the cooperation of the pressing roller 18 and the outer ring die 13, the raw materials in the outer ring die 13 will be evenly discharged through the granulation hole 1301, and when the extruded raw materials pass through the cutting knife 31, an equal-size cutting effect is obtained, ensuring that the extruded raw materials always remain within a certain size range.

[0056] See also Figure 5 , Figure 6 , Figure 8-Figure 11, a cutting mechanism is arranged in the protective box 2 and connected to the granulating mechanism, the cutting mechanism is connected to a symmetrically arranged cutting knife 31, the cutting mechanism includes a movable sleeve 20 slidably mounted on the first rotating rod 12, a limiting groove is provided on the inner wall of the movable sleeve 20, a limiting rod slidably connected to the limiting groove is fixed on the first rotating rod 12, a supporting assembly connected to the movable sleeve 20 is fixed on the first rotating rod 12, wherein the supporting assembly includes a movable plate 24 rotatably mounted on the movable sleeve 20, and a movable plate 24 is sleeved on the first rotating rod 12. There is a spring 25 abutting against the movable plate 24, and a symmetrically arranged support rod 26 is fixed on the movable plate 24. A support sleeve 27 is slidably installed on the support rod 26, and a sliding structure connected to the support sleeve 27 is provided on the protective box 2. The above-mentioned sliding structure includes a through groove 28 opened on the protective box 2 and symmetrically arranged, and a movable block 29 is slidably installed in the through groove 28. The movable block 29 is fixedly connected to the support sleeve 27, and a support plate 30 is fixed to the side wall of the movable block 29, and the support plate 30 is fixedly connected to the cutting knife 31.

[0057] Furthermore, since the ring die speed has a certain relationship with the pelletizing size, in order to ensure that the size of the pellets produced will not change due to the change in the ring die speed, it is necessary to adjust the distance between the cutting knife 31 and the outer ring die 13. Therefore, in the initial state, the spring 25 is in a compressed state, and the movable sleeve 20 is controlled by the movable plate 24 to be located at the end of the stroke away from the separating ring 15. At this time, the compression of the spring 25 is the smallest. Under the action of the movable sleeve 20, the size of the mutual fit between the support rod 26 and the support sleeve 27 is controlled by the movable plate 24 to be the smallest, so as to control the two movable blocks 29 to be located at the end of the stroke on one side of the through groove 28, and the distance between the two movable blocks 29 is the largest, and the distance between the cutting knife 31 and the outer ring die 13 is the largest. At this time, the extruded pellets cut by the cutting knife 31 are The size of the granulation hole 1301 is the smallest. When the first rotating rod 12 rotates, the movable sleeve 20 rotates synchronously under the action of the limit rod and the limit groove, thereby driving the centrifugal control mechanism to move. Under the action of centrifugal force, the movable sleeve 20 moves toward the separating ring 15 and compresses the spring 25. At the same time, the movable sleeve 20 will also drive the movable plate 24 to move, so that the support rod 26 moves a certain distance toward the support sleeve 27. As the size of the mutual fit of the support rod 26 and the support sleeve 27 increases, the two movable blocks 29 are controlled to move along the length direction of the through groove 28 and move in a direction close to each other to reduce the distance between the cutting knife 31 and the outer ring mold 13. Therefore, the size of the produced particles increases accordingly and is within the required size range.

[0058] Preferably, if the rotation speed of the first rotating rod 12 increases, the length of the raw material extruded through the granulation hole 1301 decreases. At the same time, under the action of the centrifugal control mechanism, the movable sleeve 20 continues to move toward the separating ring 15 to further reduce the distance between the cutting knife 31 and the outer ring die 13, thereby ensuring that the cutting size of the raw material by the cutting knife 31 always remains within a certain range. Similarly, if the rotation speed of the first rotating rod 12 decreases, the length of the raw material extruded through the granulation hole 1301 increases. Under the action of the centrifugal control mechanism, the distance between the cutting knife 31 and the outer ring die 13 increases, thereby achieving adaptive adjustment of the distance between the cutting knife 31 and the outer ring die 13 according to the change of the ring die speed to ensure that the granulation size always remains within a certain range, avoiding the problem of traditional granulation requiring shutdown to adjust the position of the cutting knife 31. The cutting knife 31 is fixed on the support plate 30. Before starting granulation, the position of the cutting knife 31 can be adjusted by controlling the tightness of the bolt to ensure that the cutting knife 31 adaptively changes its position at different rotation speeds and obtains a product of the required size.

[0059] See also Figure 5-Figure 10 The protective box 2 is also provided with a centrifugal control mechanism connected to the cutting mechanism, and the cutting mechanism can be operated when the granulating mechanism moves, and the distance between the cutting knife 31 and the outer ring mold 13 can be adjusted by the centrifugal control mechanism. The centrifugal control mechanism includes a fixed ring 19 fixedly installed in the protective box 2, and a conical groove 1901 is opened on the fixed ring 19, and a follower component connected to the conical groove 1901 is arranged on the movable sleeve 20, wherein the follower component includes a push plate 21 fixedly installed on the movable sleeve 20, and a symmetrically arranged slide groove 2101 is opened on the push plate 21, and a sliding block 22 is slidably installed in the slide groove 2101, and a limiting wheel 23 is fixed on the side wall of the sliding block 22, and the limiting wheel 23 is slidably connected to the conical groove 1901.

[0060] Furthermore, in the initial state, the first rotating rod 12 does not rotate, and the spring 25 is in a compressed state, so that the movable sleeve 20 is located at the end of the stroke toward the fixed ring 19. Under the action of the push plate 21, the two sliding blocks 22 are located at the end of the stroke on one side of the slide groove 2101, and the distance between the two sliding blocks 22 is minimized, so that the limiting wheel 23 is located at the end of the stroke in the direction of the tapered groove 1901 toward the center position of the fixed ring 19. When the first rotating rod 12 rotates, the movable sleeve 20 is controlled to rotate synchronously through the limiting rod and the limiting groove, so that the limiting block 23 is driven to move through the push plate 21, and the limiting block 23 will be affected. The movable sleeve 20 is pushed by the push plate 21 to move away from the fixed ring 19 to adjust the distance between the cutting knife 31 and the outer ring mold 13. The centrifugal force exerted on the limit block 23 is related to the rotation speed of the first rotating rod 12. Therefore, when the rotation speed of the first rotating rod 12 changes, the position of the cutting knife 31 changes accordingly, thereby ensuring that the granulation size is always maintained within a certain range.

[0061] A method for adjusting the particle size of a ring die pelletizer comprises the following steps:

[0062] Step 1: Put the raw materials to be granulated into the mixing and conveying mechanism, and mix the raw materials under the action of the mixing and conveying mechanism;

[0063] Step 2: After the mixing is completed, the raw materials will be transported to the outer ring die 13 through the conveying pipe 4. At the same time, under the action of the granulation mechanism, the outer ring die 13 and the pressure roller 18 are driven to rotate synchronously to extrude the raw materials placed in the outer ring die 13 through the granulation hole 1301;

[0064] Step 3: Since the outer ring die 13 is always rotating, the extruded raw material will be cut into the required size by the cutting knife 31, and then discharged through the cover plate 3;

[0065] Step 4: If the rotation speed of the outer ring die 13 and the pressure roller 18 increases, the size of the raw material extruded through the granulation hole 1301 will be reduced accordingly. Under the action of the granulation mechanism, the centrifugal control mechanism will be synchronously operated, thereby reducing the distance between the cutting knife 31 and the outer ring die 13, so as to ensure that the cut raw material is always kept within a certain size range;

[0066] Step 5: Similarly, if the rotation speed decreases, the distance between the cutting blade 31 and the outer ring die 13 increases, thereby ensuring that the particle size remains within a certain range.

[0067] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0068] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A ring die pelletizer with adjustable particle size, comprising: A truss (1), and a protection box (2) fixedly mounted on the truss (1), a cover plate (3) being rotatably mounted on the protection box (2), and a conveying pipe (4) being fixed on the cover plate (3); It is characterized by further comprising: An outer ring die (13) is rotatably mounted on the side wall of the protection box (2), and a plurality of granulation holes (1301) are provided on the circumferential outer wall of the outer ring die (13) and are equidistantly distributed around the circumference; A mixing and conveying mechanism, arranged on the protection box (2) and in communication with the conveying pipe (4), for mixing materials and conveying them into the outer ring mold (13) through the conveying pipe (4); A granulating mechanism is arranged in the protective box (2) and connected to the outer ring die (13), the granulating mechanism is connected to symmetrically arranged pressing rollers (18), and the granulating mechanism can drive the outer ring die (13) and the pressing rollers (18) to rotate synchronously; A cutting mechanism is arranged in the protective box (2) and connected to the granulating mechanism. The cutting mechanism is connected to symmetrically arranged cutting knives (31). The protective box (2) is also provided with a centrifugal regulating mechanism connected to the cutting mechanism. The cutting mechanism can be activated when the granulating mechanism moves, and the distance between the cutting knife (31) and the outer ring mold (13) can be adjusted by the centrifugal regulating mechanism.

2. The particle size adjustable ring die pelletizer according to claim 1, characterized in that: The mixing and conveying mechanism comprises a modulator (5) fixedly mounted on the protective box (2) and connected and coordinated with the conveying pipe (4), a feeder (6) being fixed on the top of the modulator (5), a first motor (7) being fixed on the modulator (5), a spiral dragon (8) connected to the output shaft of the first motor (7) being rotatably mounted in the feeder (6), and a stirring assembly being arranged in the modulator (5).

3. The particle size adjustable ring die pelletizer according to claim 2, characterized in that: The stirring assembly comprises a second motor (9) fixedly mounted on the side wall of the modulator (5); a transmission rod (10) connected to an output shaft of the second motor (9) is rotatably mounted on the modulator (5); and a plurality of stirring blades (11) equidistantly distributed are fixedly mounted on the transmission rod (10).

4. The particle size adjustable ring die pelletizer according to claim 1, characterized in that: The granulating mechanism comprises a first rotating rod (12) rotatably mounted on the protective box (2), the first rotating rod (12) being fixedly connected to the outer ring die (13), a fixed rod (14) penetrating the outer ring die (13) being fixed inside the protective box (2), a separating ring (15) being rotatably sealed and connected to the outer ring die (13) being fixed at the end of the fixed rod (14); It also comprises a second rotating rod (17) rotatably mounted on the separation ring (15) and symmetrically arranged, the second rotating rod (17) being fixedly connected to the pressure roller (18), and a belt (16) connected to the first rotating rod (12) being sleeved on the second rotating rod (17).

5. The particle size adjustable ring die pelletizer according to claim 4, characterized in that: The cutting mechanism comprises a movable sleeve (20) slidably mounted on the first rotating rod (12); a limiting groove is provided on the inner wall of the movable sleeve (20); a limiting rod slidably connected to the limiting groove is fixed on the first rotating rod (12); and a supporting assembly connected to the movable sleeve (20) is fixed on the first rotating rod (12).

6. The particle size adjustable ring die pelletizer according to claim 5, characterized in that: The support assembly comprises a movable plate (24) rotatably mounted on the movable sleeve (20); a spring (25) is sleeved on the first rotating rod (12) and abuts against the movable plate (24); symmetrically arranged support rods (26) are fixed on the movable plate (24); a support sleeve (27) is slidably mounted on the support rod (26); and a sliding structure connected to the support sleeve (27) is provided on the protective box (2).

7. The particle size adjustable ring die pelletizer according to claim 6, characterized in that: The sliding structure comprises a through groove (28) which is opened on the protective box (2) and is symmetrically arranged. A movable block (29) is slidably installed in the through groove (28). The movable block (29) is fixedly connected to the supporting sleeve (27). A supporting plate (30) is fixed to the side wall of the movable block (29). The supporting plate (30) is fixedly connected to the cutting knife (31).

8. The particle size adjustable ring die pelletizer according to claim 5, characterized in that: The centrifugal control mechanism comprises a fixed ring (19) fixedly installed in the protective box (2), the fixed ring (19) is provided with a conical groove (1901), and the movable sleeve (20) is provided with a follower component connected to the conical groove (1901).

9. The particle size adjustable ring die pelletizer according to claim 8, characterized in that: The follower assembly comprises a push plate (21) fixedly mounted on the movable sleeve (20), the push plate (21) being provided with symmetrically arranged sliding grooves (2101), a sliding block (22) being slidably mounted in the sliding groove (2101), a limiting wheel (23) being fixed on the side wall of the sliding block (22), and the limiting wheel (23) being slidably connected to the conical groove (1901).

10. A method for adjusting the particle size of a ring die pelletizer, using the particle size adjustable ring die pelletizer according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Put the raw materials to be granulated into the mixing and conveying mechanism, and mix the raw materials under the action of the mixing and conveying mechanism; Step 2: After the mixing is completed, the raw materials will be transported to the outer ring die (13) through the conveying pipe (4). At the same time, under the action of the granulating mechanism, the outer ring die (13) and the pressing roller (18) are driven to rotate synchronously to extrude the raw materials placed in the outer ring die (13) through the granulating hole (1301); Step 3: Since the outer ring die (13) is always rotating, the extruded raw material will be cut into the required size by the cutting knife (31), and then discharged through the cover plate (3); Step 4: If the rotation speeds of the outer ring die (13) and the pressure roller (18) increase, the size of the raw material extruded through the granulation hole (1301) will be correspondingly reduced. Under the action of the granulation mechanism, the centrifugal control mechanism will be synchronously actuated, thereby reducing the distance between the cutting knife (31) and the outer ring die (13), so as to ensure that the cut raw material always remains within a certain size range; Step 5: Similarly, if the rotation speed decreases, the distance between the cutting blade (31) and the outer ring die (13) increases, thereby ensuring that the particle size remains within a certain range.

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