A particle size adjustable ring die granulator and particle size adjustment method

Abstract

The present invention relates to the technical field of ring die granulation, and specifically relates to a ring die granulator with adjustable particle size and a particle size adjustment method, including: a truss, and a protective box fixedly installed on the truss. A cover plate is rotatably installed on the protective box, and a conveying pipe is fixed on the cover plate; an outer ring die is rotatably installed on the side wall of the protective box, and a plurality of granulation holes are arranged on the circumferential outer wall of the outer ring die at equal circumferential intervals; a mixing and conveying mechanism is arranged on the protective box and is in conduction cooperation with the conveying pipe; a granulation mechanism is arranged in the protective box and is connected to the outer ring die, and a pair of pressure rollers are symmetrically arranged and connected to the granulation mechanism; a cutting mechanism is arranged in the protective box and is connected to the granulation mechanism, and a pair of cutting knives are symmetrically arranged and connected to the cutting mechanism. An eccentric control mechanism connected to the cutting mechanism is also arranged in the protective box. This application can automatically adjust the distance between the cutting knife and the outer ring die according to the rotational speeds of the outer ring die and the pressure rollers to ensure that the granulation size always remains within a certain range.

Description

Technical Field

[0001] The present invention relates to the technical field of ring die granulation, and specifically to a ring die granulator with adjustable particle size and a method for adjusting particle size. Background Art

[0002] A ring die granulator forms columnar particles by extrusion through a pressure roller and continuous extrusion through the die holes of a ring die, and as the ring die rotates, the formed columnar particles are cut into finished products of a certain length by a cutter fixedly installed outside the ring die.

[0003] When granulating raw materials, the length of the granulated material is an important quality evaluation index. The main factors affecting the particles include: the influence of the ring die speed and rotational speed. The particle size is inversely proportional to the ring die speed and the particle length. 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. Conversely, 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 the ring die aperture and the opening rate. The larger the aperture and the more the number of openings, the smaller the resulting particles; the influence of the inner diameter of the ring die, the effective width of the ring die, and the particle density on the particle size. The density is related to the granulation raw materials and also to the ring die compression ratio, but the difference in particle density is not significant. For the same granulation raw material, the larger the obtained particle size, the shorter the particle length.

[0004] Since the raw material density and the ring die shape are basically adjusted before production, they do not affect the production process. However, if the ring die speed needs to be adjusted, it is necessary to stop the machine to adjust the position of the cutting knife to ensure that the size of the manufactured product is within a certain range. This affects the production efficiency and may also cause problems such as uneven product size and poor product quality. Summary of the Invention

[0005] The purpose of the present invention is to provide a ring die granulator with adjustable particle size and a method for adjusting particle size to solve the problems raised in the above background art.

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

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

[0008] A truss, and a protective box fixedly installed on the truss. A cover plate is rotatably installed on the protective box, and a conveying pipe is fixed on the cover plate;

[0009] Further comprising:

[0010] An outer ring die, rotatably installed on the side wall of the protective box. A plurality of granulation holes are arranged on the circumferential outer wall of the outer ring die at equal circumferential intervals;

[0011] A mixing and conveying mechanism is arranged on the protective box and is in conduction cooperation with the conveying pipe, and is used for mixing materials and conveying them into the outer ring die through the conveying pipe;

[0012] A granulation mechanism is arranged in the protective box and is connected to the outer ring die. Symmetrically arranged pressure rollers are connected to the granulation mechanism, and the granulation mechanism can drive the outer ring die and the pressure rollers to rotate synchronously;

[0013] A cutting mechanism is arranged in the protective box and is connected to the granulation mechanism. Symmetrically arranged cutting knives are connected to the cutting mechanism. A centrifugal regulation mechanism connected to the cutting mechanism is also arranged in the protective box. The cutting mechanism can act when the granulation mechanism moves, and the distance between the cutting knives and the outer ring die can be adjusted through the centrifugal regulation mechanism.

[0014] As a further scheme of the present invention: The mixing and conveying mechanism includes a conditioner fixedly installed on the protective box and in conduction cooperation with the conveying pipe. A feeder is fixed on the top of the conditioner. A first motor is fixed on the conditioner. A spiral auger connected to the output shaft of the first motor is rotatably installed in the feeder, and a stirring assembly is arranged in the conditioner.

[0015] As a further scheme of the present invention: The stirring assembly includes a second motor fixedly installed on the side wall of the conditioner. A transmission rod connected to the output shaft of the second motor is rotatably installed on the conditioner. A plurality of stirring blades are fixedly installed on the transmission rod at equal intervals.

[0016] As a further scheme of the present invention: The granulation mechanism includes a first rotating rod rotatably installed on the protective box. The first rotating rod is fixedly connected to the outer ring die. A fixed rod passing through the outer ring die is fixed in the protective box, and a partition ring rotatably and sealingly connected to the outer ring die is fixed at the end of the fixed rod;

[0017] It also includes second rotating rods rotatably installed on the partition ring and arranged symmetrically. The second rotating rods are fixedly connected to the pressure rollers, and a belt connected to the first rotating rod is sleeved on the second rotating rods.

[0018] As a further scheme of the present invention: The cutting mechanism includes a movable sleeve slidably installed on the first rotating rod. A limiting groove is formed in 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 support 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. A spring abutting against the movable plate is sleeved on the first rotating rod. Symmetrically arranged support rods are fixed on the movable plate. A support sleeve is slidably mounted on the support rods. 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 symmetrically arranged and opened on the protective box. Movable blocks are slidably mounted in the through grooves. The movable blocks are fixedly connected to the support sleeves. A support plate is fixed on the side wall of the movable block. The support plate is fixedly connected to the cutting knife.

[0021] As a further solution of the present invention: The centrifugal regulation mechanism includes a fixed ring fixedly mounted in the protective box. A conical groove is opened on the fixed ring. A follower assembly connected to the conical groove is provided on the movable sleeve.

[0022] As a further solution of the present invention: The follower assembly includes a push plate fixedly mounted on the movable sleeve. Symmetrically arranged sliding grooves are opened on the push plate. Sliding blocks are slidably mounted in the sliding grooves. A limiting wheel is fixed on the side wall of the sliding block. The limiting wheel is slidably connected to the conical groove.

[0023] A method for adjusting the particle size of a ring die granulator, comprising the following steps:

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

[0025] Step 2: After mixing, the raw materials will be conveyed through the conveying pipe into the outer ring die. At the same time, under the action of the granulating mechanism, drive the outer ring die and the pressing roller to rotate synchronously to extrude the raw materials placed in the outer ring die through the granulating holes.

[0026] Step 3: Since the outer ring die is always rotating, therefore, under the action of the cutting knife, the extruded raw materials will be cut into the required size, and then discharged through the cover plate.

[0027] Step 4: If the rotational speeds of the outer ring die and the pressing roller increase, the size of the raw materials extruded through the granulating holes will correspondingly decrease. Under the action of the granulating mechanism, the centrifugal regulation mechanism will act synchronously, thereby reducing the distance between the cutting knife and the outer ring die to ensure that the cut raw materials always remain within a certain size range.

[0028] Step 5: Similarly, if the rotational 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: This application can automatically adjust the distance between the cutting knife and the outer ring die according to the rotational speeds of the outer ring die and the pressing roller to ensure that the granulation size always remains within a certain range. Before granulation, the raw materials can be conveyed into 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 into the outer ring die through the conveying pipe. At this time, under the action of the granulation mechanism, the outer ring die and the pressing roller are controlled to rotate synchronously to extrude the raw materials in the outer ring die through the granulation holes. Meanwhile, under the action of the cutting knife, the extruded raw materials are evenly cut. If the rotational speeds of the outer ring die and the pressing roller change, the length of the raw materials extruded through the granulation holes will change correspondingly. At this time, the granulation mechanism will control the movement of the cutting mechanism through the centrifugal regulation 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 manufactured product always remains within a certain range. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic structural diagram of an embodiment of a ring die granulator with adjustable particle size.

[0031] Figure 2 It is a schematic structural diagram of another angle in an embodiment of a ring die granulator with adjustable particle size.

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

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

[0034] Figure 5 It is a schematic structural diagram of the granulation mechanism, outer ring die, cutting knife, and protective box in an embodiment of a ring die granulator with adjustable particle size.

[0035] Figure 6 It is a schematic diagram of a partial half-sectional structure in an embodiment of a ring die granulator with adjustable particle size.

[0036] Figure 7 For Figure 6 The enlarged schematic structural diagram of part A in

[0037] Figure 8 It is a schematic diagram of the connection relationship of the centrifugal regulation mechanism, part of the granulation mechanism, and cutting mechanism in an embodiment of a ring die granulator with adjustable particle size.

[0038] Figure 9 It is a schematic structural diagram of the granulation mechanism, part of the centrifugal regulation mechanism, and part of the cutting mechanism in an embodiment of a ring die granulator with adjustable particle size.

[0039] Figure 10Schematic explosion structure diagram of the centrifugal control mechanism and part of the granulation mechanism in an embodiment of a particle size adjustable ring die granulator.

[0040] Figure 11 Schematic explosion structure diagram of part of the cutting mechanism in an embodiment of a particle size adjustable ring die granulator.

[0041] In the figure: 1, truss; 2, protective box; 3, cover plate; 4, conveying pipe; 5, conditioner; 6, feeder; 7, first motor; 8, screw conveyor; 9, second motor; 10, transmission rod; 11, stirring blade; 12, first rotating rod; 13, outer ring die; 1301, granulation holes; 14, fixed rod; 15, separating ring; 16, belt; 17, second rotating rod; 18, pressing roller; 19, fixed ring; 1901, conical groove; 20, movable sleeve; 21, push plate; 2101, chute; 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 implementation manners

[0042] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0043] In addition, an element in the present invention is referred to as being "fixed to" or "disposed on" another element, which can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manners.

[0044] Please refer to Figures 1 to 11 , in an embodiment of the present invention, a particle size adjustable ring die granulator includes:

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

[0046] It further includes:

[0047] An outer ring die 13, rotatably installed on the side wall of the protective box 2, and a plurality of granulation holes 1301 are provided on the circumferential outer wall of the outer ring die 13 and are circumferentially equidistantly distributed;

[0048] Preferably, when granulating raw materials, the pellet length is an important quality evaluation index. The following are the main factors affecting the pellets, including:

[0049] The influence of the ring die speed and rotation speed. The particle size, ring die speed and pellet length are inversely proportional. When the output is constant, if the ring die speed is faster, the transient time of the particles generated is shorter, and the pellet length is smaller. Conversely, if the ring die speed is slower, the transient time of the particles generated is longer, and the pellet length is larger. The influence of the ring die aperture and the opening rate. The larger the aperture and the more the number of openings, the smaller the resulting pellets. The influence of the inner diameter of the ring die, the effective width of the ring die and the pellet density on the pellet size. The density is related to the granulating raw materials and also to the ring die compression ratio, but the difference in pellet density is not significant. For the same granulating raw material, the larger the diameter of the pellets produced, the shorter the pellet length. Since the raw material density and the ring die shape are basically adjusted before production, this application mainly improves the influence of the ring die speed on the pellets to ensure that the particle size remains within a certain range under different ring die speeds.

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

[0051] Please refer to Figures 1 - 4 , the mixing and conveying mechanism, which is arranged on the protective box 2 and is in conduction cooperation with the conveying pipe 4, is used to mix the materials and convey them into the outer ring die 13 through the conveying pipe 4. The mixing and conveying mechanism includes a conditioner 5 fixedly installed on the protective box 2 and in conduction cooperation with the conveying pipe 4. A feeder 6 is fixed on the top of the conditioner 5. A first motor 7 is fixed on the conditioner 5. A spiral auger 8 connected to the output shaft of the first motor 7 is rotatably installed in the feeder 6. A stirring assembly is arranged in the conditioner 5. Among them, the stirring assembly includes a second motor 9 fixedly installed on the side wall of the conditioner 5. A transmission rod 10 connected to the output shaft of the second motor 9 is rotatably installed on the conditioner 5. A plurality of stirring blades 11 are fixedly installed on the transmission rod 10 at equal intervals.

[0052] Specifically, before granulating the raw materials, it is necessary to ensure that all the raw materials are fully mixed to meet the required quality for granulation. Therefore, before granulation, first close the cover plate 3 to make the conveying pipe 4 in conduction cooperation with the conditioner 5. 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 into the conditioner 5 through the spiral auger 8. During the conveying process, the spiral auger 8 can also preliminarily mix the raw materials. When the raw materials enter the conditioner 5, the second motor 9 works and drives the transmission rod 10 to rotate, thereby driving the stirring blades 11 to rotate. Under the action of the stirring blades 11, all the raw materials can be fully mixed.

[0053] Preferably, after the raw materials are mixed, they need to be transported into the conveying pipe 4. Therefore, an air supply pipe can be connected to the end of the modulator 5. This air supply pipe is used to blow the raw materials towards the conveying pipe 4. At the same time, under the action of the gas flow, the mixing between the raw materials is further accelerated. The mixed raw materials will be transported into the outer ring die 13 through the conveying pipe 4. By repeating the above steps, the effect of continuous mixing and transportation can be achieved.

[0054] Please refer to Figure 5 、 Figure 6 、 Figures 8 - 10 A granulation mechanism is provided inside the protective box 2 and is connected to the outer ring die 13. Symmetrically arranged pressure rollers 18 are connected to the granulation mechanism. The granulation mechanism can drive the outer ring die 13 and the pressure rollers 18 to rotate synchronously. The granulation mechanism includes a first rotating rod 12 rotatably installed on the protective box 2. The first rotating rod 12 is fixedly connected to the outer ring die 13. A fixed rod 14 passing through the outer ring die 13 is fixed inside the protective box 2. A partition ring 15 that is rotatably and sealingly connected to the outer ring die 13 is fixed at the end of the fixed rod 14. It also includes second rotating rods 17 that are rotatably installed on the partition ring 15 and are symmetrically arranged. The second rotating rods 17 are fixedly connected to the pressure rollers 18. A belt 16 connected to the first rotating rod 12 is sleeved on the second rotating rods 17.

[0055] It should be noted that when granulating the raw materials, it is necessary to extrude the raw materials placed inside the outer ring die 13 through the mutual extrusion and cooperation of the pressure rollers 18 and the outer ring die 13. The partition 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 it is necessary to granulate the raw materials, under the action of the modulator 5, the raw materials are transported into 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 rods 17 to rotate through the belt 16 to ensure that the two pressure rollers 18 rotate synchronously. Under the cooperation of the pressure rollers 18 and the outer ring die 13, the raw materials inside the outer ring die 13 will be evenly discharged through the granulation holes 1301. When the extruded raw materials pass through the cutting knife 31, the effect of equal-size cutting is obtained, ensuring that the extruded raw materials always remain within a certain size range.

[0056] Please refer to Figure 5 、 Figure 6 、 Figures 8 - 11, a cutting mechanism, is arranged in the protection box 2 and connected to the granulation mechanism. Symmetrically arranged cutting knives 31 are connected to the cutting mechanism. The cutting mechanism includes a movable sleeve 20 slidably mounted on the first rotating rod 12. A limiting groove is formed in the inner wall of the movable sleeve 20, and a limiting rod slidably connected to the limiting groove is fixed on the first rotating rod 12. A supporting component connected to the movable sleeve 20 is fixed on the first rotating rod 12. Among them, the supporting component includes a movable plate 24 rotatably mounted on the movable sleeve 20. A spring 25 abutted against the movable plate 24 is sleeved on the first rotating rod 12. Symmetrically arranged support rods 26 are fixed on the movable plate 24. A support sleeve 27 is slidably mounted on the support rod 26. A sliding structure connected to the support sleeve 27 is arranged on the protection box 2. The above-mentioned sliding structure includes through grooves 28 symmetrically formed in the protection box 2. An activity block 29 is slidably mounted in the through groove 28. The activity block 29 is fixedly connected to the support sleeve 27. A support plate 30 is fixed on the side wall of the activity block 29. The support plate 30 is fixedly connected to the cutting knife 31.

[0057] Furthermore, since there is a certain relationship between the ring die speed and the granulation size, in order to ensure that the size of the produced particles will not change due to the change of 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 at the end of the stroke in the direction away from the separation ring 15. At this time, the compression amount of the spring 25 is the smallest. Under the action of the movable sleeve 20, the size of the mutual nesting of 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 activity blocks 29 to be at the end of the stroke on one side of the through groove 28, and the distance between the two activity blocks 29 is the largest. The distance between the cutting knife 31 and the outer ring die 13 is the largest. At this time, the size of the cutting knife 31 cutting and extruding the granulation hole 1301 is the smallest. When the first rotating rod 12 rotates, under the action of the limiting rod and the limiting groove, the movable sleeve 20 rotates synchronously, thereby driving the centrifugal regulation mechanism to move. Under the action of centrifugal force, the movable sleeve 20 moves towards the separation ring 15 direction and compresses the spring 25. At the same time, the movable sleeve 20 also drives the movable plate 24 to move, so that the support rod 26 moves a certain distance into the support sleeve 27. Since the size of the mutual nesting of the support rod 26 and the support sleeve 27 increases, the two activity blocks 29 are controlled to move along the length direction of the through groove 28 and move towards the direction of approaching each other, so as to reduce the distance between the cutting knife 31 and the outer ring die 13. Therefore, the size of the produced particles increases correspondingly and is within the required size range.

[0058] Preferably, when the rotation speed of the first rotating rod 12 increases, the length of the raw material extruded through the granulation holes 1301 decreases. At the same time, under the action of the centrifugal regulation mechanism, the movable sleeve 20 continues to move towards the partition ring 15 to further reduce the distance between the cutting knife 31 and the outer ring die 13, so as to ensure 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 holes 1301 increases, and under the action of the centrifugal regulation mechanism, the distance between the cutting knife 31 and the outer ring die 13 increases, so as to adaptively adjust the distance between the cutting knife 31 and the outer ring die 13 according to the change of the ring die speed, ensuring that the granulation size always remains within a certain range and avoiding the problem that the traditional granulation requires stopping the machine to adjust the position of the cutting knife 31. Among them, 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 bolts to ensure that the cutting knife 31 adaptively changes its position at different rotation speeds and obtains products of the required size.

[0059] Please refer to Figures 5 - 10 , a centrifugal regulation mechanism connected to the cutting mechanism is further arranged in the protection box 2. The cutting mechanism can act when the granulation mechanism moves, and the distance between the cutting knife 31 and the outer ring die 13 is adjusted through the centrifugal regulation mechanism. The centrifugal regulation mechanism includes a fixed ring 19 fixedly installed in the protection box 2. A conical groove 1901 is formed in the fixed ring 19. A follower assembly connected to the conical groove 1901 is arranged on the movable sleeve 20. Among them, the follower assembly includes a push plate 21 fixedly installed on the movable sleeve 20. Symmetrically arranged sliding grooves 2101 are formed in the push plate 21. A sliding block 22 is slidably installed in the sliding grooves 2101. A limiting wheel 23 is fixedly arranged on the side wall of the sliding block 22. The limiting wheel 23 is slidably connected to the conical groove 1901.

[0060] Furthermore, in the initial state, the first rotating rod 12 is not rotated, and the spring 25 is in a compressed state, so that the movable sleeve 20 is at the end of the stroke in the direction towards the fixed ring 19. Under the action of the push plate 21, the two sliding blocks 22 are at the end of the stroke on one side of the chute 2101, and the distance between the two sliding blocks 22 is the smallest, so that the limiting wheel 23 is at the end of the stroke in the direction of the center position of the conical groove 1901 towards 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 as to drive the limiting block 23 to move through the push plate 21. The limiting block 23 will be subjected to centrifugal force and move in the direction away from each other, so as to drive the limiting wheel 23 to slide in the conical groove 1901. Since the conical groove 1901 is arranged in a conical shape, under the action of the conical groove 1901 and the limiting wheel 23, the movable sleeve 20 is pushed by the push plate 21 to move in the direction away from the fixed ring 19, so as to adjust the distance between the cutting knife 31 and the outer ring die 13. Among them, since the centrifugal force received by the limiting block 23 is related to the rotation speed of the first rotating rod 12, when the rotation speed of the first rotating rod 12 changes, the position of the cutting knife 31 changes correspondingly, so as to ensure that the granulation size always remains within a certain range.

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

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

[0063] Step 2: After mixing, the raw materials will be conveyed into 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 pressure roller 18 are driven to rotate synchronously, so as to extrude the raw materials placed in the outer ring die 13 through the granulation holes 1301.

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

[0065] Step 4: If the rotation speeds of the outer ring die 13 and the pressure roller 18 increase, the size of the raw materials extruded through the granulation holes 1301 will decrease correspondingly. Under the action of the granulating mechanism, the centrifugal regulation mechanism is made to act synchronously, so as to reduce the distance between the cutting knife 31 and the outer ring die 13, so as to ensure that the cut raw materials always remain within a certain size range.

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

[0067] It is obvious to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Accordingly, all changes that fall within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0068] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only one independent technical solution. This narrative manner of the specification is merely for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A ring die pelletizer with adjustable particle size, comprising: 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; It is characterized by further comprising: 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; 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; 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; A cutting mechanism is arranged in the protection box and connected to the granulating mechanism, the cutting mechanism is connected to symmetrically arranged cutting knives, and a centrifugal regulating mechanism connected to the cutting mechanism is also arranged in the protection box, the cutting mechanism can be operated when the granulating mechanism moves, and the distance between the cutting knives and the outer ring die can be adjusted by the centrifugal regulating mechanism; The granulating mechanism comprises a first rotating rod rotatably mounted on the protective box; The cutting mechanism comprises a movable sleeve slidably mounted on the first rotating rod; The centrifugal control mechanism comprises 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 assembly connected with the tapered groove; The follower assembly includes a push plate fixedly mounted on the movable sleeve, the push plate is provided with symmetrically arranged sliding grooves, a sliding block is slidably mounted 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.

2. The particle size adjustable ring die pelletizer according to claim 1, characterized in that: The mixing and conveying mechanism includes a modulator fixedly mounted on the protective box and connected and coordinated 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.

3. The particle size adjustable ring die pelletizer according to claim 2, characterized in that: The stirring assembly comprises 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.

4. The particle size adjustable ring die pelletizer according to claim 1, characterized in that ,, the first rotating rod is fixedly connected to the outer ring die, a fixing rod penetrating the outer ring die is fixed in the protection box, and a separating ring which is rotatably sealed and connected to the outer ring die is fixed at the end of the fixing rod; 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.

5. The particle size adjustable ring die pelletizer according to claim 4, characterized in that: The inner wall of the movable sleeve is provided with a limiting groove, the first rotating rod is fixed with a limiting rod slidably connected with the limiting groove, and the first rotating rod is fixed with a supporting assembly connected with the movable sleeve.

6. The particle size adjustable ring die pelletizer according to claim 5, characterized in that: 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.

7. The particle size adjustable ring die pelletizer according to claim 6, characterized in that: The sliding structure includes through grooves opened on the protection box and arranged symmetrically, a movable block is slidably installed in the through groove, the movable block is fixedly connected to the supporting sleeve, a supporting plate is fixed to the side wall of the movable block, and the supporting plate is fixedly connected to the cutting knife.

8. 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 7, 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 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; 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; 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; 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.

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