Wet shearing granulator
By using a movable sealing plate and spray gun structure in the wet shearing pellet mill, the problems of dust flying and production discontinuity caused by poor sealing of the discharge port were solved, the cleaning of residues was automated, and the performance of the equipment was improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-11
- Publication Date
- 2026-03-13
AI Technical Summary
In the wet granulation process, poor sealing at the discharge port can lead to material spraying, which affects the on-site environment and personnel health, reduces production continuity, and increases labor intensity.
A wet shearing granulator was designed, which adopts a movable sealing plate and spray gun structure. The sealing plate seals the mixing chamber when not discharging material, and switches to the conducting state when discharging material. The spray gun blows the material out of the discharge port to clean the residue and prevent dust from flying.
It effectively prevents dust from flying, reduces the labor intensity of personnel, ensures production continuity, improves the durability of equipment, and avoids the occurrence of material spraying.
Smart Images
Figure CN223988443U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of wet granulation equipment, and in particular relates to a wet shear granulator. Background Technology
[0002] In wet granulation processes, high-speed shear granulators are often used to prepare the soft material before extrusion granulation. In a high-speed shear granulator, the main material (nutrients) and auxiliary materials are mixed evenly under dry conditions by a stirring paddle. Then, a wetting agent or binder solution is sprayed onto the mixed dry powder through a spray gun. Under the action of the stirring paddle and shear blades, the dry powder forms a wet soft material with good plasticity under the liquid bridging effect of the wetting agent or binder solution. After mixing, the soft material is discharged through the discharge port.
[0003] High-speed shear granulators are intermittently operating equipment, repeatedly executing the process of "dry powder feeding → dry powder mixing → binder solution or wetting agent atomization → wet shear mixing → unloading" in continuous production. During the discharge process, due to the poor flowability of the wet soft material, it easily accumulates at the connection between the discharge port and the discharge valve. After discharge, the discharge valve closes, squeezing and deforming the remaining wet material at the discharge port, causing the valve to not seal properly. When the next round of dry powder feeding occurs, the dry powder will leak from the poorly sealed discharge valve, resulting in a spray phenomenon and dust pollution on site. This spray phenomenon on site first affects the on-site environment and occupational health of personnel. Second, due to the poor seal, the dry powder leaks into the next process before wet mixing, which not only affects the one-time pelleting rate but may also clog the granulation screen and cause screen damage. Third, due to the poor seal, the discharge port needs to be cleaned frequently by hand, affecting production continuity and increasing the labor intensity of personnel. Utility Model Content
[0004] The purpose of this invention is to provide a wet shearing granulator to solve the problems existing in the prior art.
[0005] To achieve the above objectives, this utility model provides a wet shearing granulator, comprising a cylinder, a discharge pipe, and a sealing plate; the cylinder has a stirring chamber for stirring materials inside, and a discharge port is provided at the bottom of the inner wall of the cylinder; the discharge pipe has a discharge channel inside, and the inlet end of the discharge channel is connected to the discharge port of the cylinder; the sealing plate is disposed on the outside of the cylinder, and a spray gun is disposed on the sealing plate, with one end of the spray gun having a nozzle penetrating the sealing plate and facing the discharge port; the sealing plate includes a sealed state and an open state.
[0006] When the sealing plate is in a sealed state, the sealing plate and the cylinder form a complete stirring chamber, and the discharge channel and the stirring chamber are separated by the sealing plate; when the sealing plate is in an open state, the sealing plate and the cylinder are spaced apart, and the discharge channel and the stirring chamber are connected; the sealing plate is driven to move by a driving element, and the sealing plate switches between a sealed state and an open state based on the driving element driving the sealing plate to move.
[0007] Optionally, the spray gun includes a spray gun body, a nozzle, a first conduit, and a drive assembly. The spray gun body has an internal mounting cavity, and the nozzle is located at one end of the mounting cavity. The nozzle is slidably disposed within the mounting cavity, and the nozzle is located on the sliding trajectory of the nozzle. The end of the nozzle near the nozzle is a sealed end, and the nozzle is detachably connected to the sealed end. The nozzle and the spray gun body together form a conductive cavity on the side near the nozzle, and the conductive cavity is connected to the first conduit. The drive assembly is used to drive the nozzle to slide within the mounting cavity.
[0008] Optionally, the gun needle and the spray gun body form a sealed cavity on the side away from the spray nozzle. The drive assembly includes a second pipe communicating with the sealed cavity. The connecting cavity is a sealed chamber. Based on the pressure difference between the sealed cavity and the connecting cavity, the gun needle slides within the mounting cavity.
[0009] Optionally, a sliding plate is detachably connected to the outer circumference of the gun needle, and the sliding plate is slidably disposed in the mounting cavity; the sealing cavity and the conducting cavity are respectively disposed on both sides of the sliding plate, and the conducting cavity and the first conducting port of the first pipeline, and the sealing cavity and the second conducting port of the second pipeline are respectively disposed on both sides of the sliding plate.
[0010] Optionally, a first sealing ring is fitted on the side of the gun needle away from the sealing end, and the first sealing ring is sealed to the spray gun body and detachably connected.
[0011] Optionally, the end of the spray gun body away from the nozzle is an open end, and a stop block is detachably connected to the side of the open end of the spray gun body away from the nozzle. The distance between the stop block and the gun needle is not greater than the distance between the first guide port and the second guide port.
[0012] Optionally, a second sealing ring is provided between the sliding plate and the inner wall of the spray gun body, and the second sealing ring and the sliding plate are detachably connected.
[0013] Optionally, the first pipeline is provided with a first control valve and a first pressure regulating valve; the second pipeline is provided with a second control valve and a second pressure regulating valve.
[0014] Optionally, the discharge pipe body has a T-shaped structure, and the discharge pipe body is provided with mutually perpendicular and interconnected through channels and blind channels. The through channels are distributed radially along the cylinder body, the sealing plate is slidably disposed in the through channels, and the driving element is disposed in the through channels. The discharge channel includes blind channels and through channels near the discharge port, and the outlet end of the blind channel is lower than the height of the discharge port.
[0015] Optionally, the driving element is a cylinder, the fixed end of the cylinder is detachably connected to the end of the through channel away from the discharge port, and the telescopic end of the cylinder is detachably connected to the sealing plate.
[0016] Compared with the prior art, the present invention has the following advantages and technical effects:
[0017] In the non-discharge state, the sealing plate of the wet shear granulator provided by this utility model is in a sealed state, that is, the sealing plate and the cylinder form a complete mixing chamber, and the discharge channel and the mixing chamber are separated by the sealing plate. After the preparation of wet soft material is completed inside the mixing chamber, the driving element drives the sealing plate to move, and the sealing plate switches from the sealed state to the open state. The sealing plate and the cylinder are spaced apart, and the discharge channel and the mixing chamber are connected. The wet soft material enters the discharge channel through the discharge port and then exits the cylinder. After the wet soft material is discharged, the spray gun on the sealing plate blows the wet soft material accumulated at the discharge port into the mixing chamber inside the cylinder, preventing the wet soft material from accumulating at the discharge port. The driving element drives the sealing plate to move, and the sealing plate switches from the open state to the sealed state, completing the discharge work. This invention solves the problems of dust flying caused by the residual material not sealing the outlet and the sealing plate properly, which affects the subsequent granulation process and increases the labor intensity of personnel by setting a spray gun on the sealing plate. After the wet soft material is discharged, the spray gun blows away the residual material on the outlet. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of the structure of the wet shear granulator of this utility model;
[0020] Figure 2 for Figure 1 A magnified view of part A in the image;
[0021] Figure 3This is a schematic diagram of the discharge valve structure of this utility model.
[0022] Figure 4 This is a schematic diagram of the spray gun structure of this utility model;
[0023] Figure 5 This is a schematic diagram of the internal structure of the spray gun of this utility model.
[0024] The components include: 1. Powder inlet; 3. Liquid storage tank; 4. Compressed air inlet pipe; 5. Compressed air inlet valve; 6. Liquid outlet valve; 7. Liquid inlet pipe; 9. Dust collector filter cartridge; 10. Viewing window; 11. Top cover; 12. Cylinder body; 13. Agitator; 14. Shearing blade; 15. Outlet; 16. Outlet valve; 16.1. Spray gun; 16.1.1. Spray gun body; 16.1.2. Spray needle; 16.1.3. Second pipeline; 16.1.4. First pipeline; 16.1.5. First sealing ring. 16.1.6, Stop block; 16.1.7, Second sealing ring; 16.1.8, Second control valve; 16.1.9, Second pressure regulating valve; 16.1.10, First control valve; 16.1.11, First pressure regulating valve; 16.1.12, Injection nozzle; 16.1.13, Conducting cavity; 16.1.14, Sealing cavity; 16.1.15, Sliding plate; 16.2, Sealing plate; 17, Stirring motor; 18, Shearing blade motor; 19, Control panel; 20, Cylinder; 21, Discharge pipe body. Detailed Implementation
[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this utility model can be combined with each other. The described embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.
[0026] Reference Figures 1-5 This embodiment provides a wet shearing granulator, including a cylinder 12, a discharge pipe 21, and a sealing plate 16.2. The cylinder 12 has a mixing chamber for stirring materials, and a discharge port 15 is provided at the bottom of its inner wall. The discharge pipe 21 has a discharge channel, with the inlet end of the channel communicating with the discharge port 15 of the cylinder 12. The sealing plate 16.2 is located on the outside of the cylinder 12, and a spray gun 16.1 is mounted on it. One end of the spray gun 16.1 with a nozzle 16.1.12 penetrates the sealing plate 16.2 and faces the discharge port 15. The sealing plate 16.2 has both a sealed state and an open state.
[0027] When the sealing plate 16.2 is in the sealed state, the sealing plate 16.2 and the cylinder 12 form a complete stirring chamber, and the discharge channel and the stirring chamber are separated by the sealing plate 16.2; when the sealing plate 16.2 is in the open state, the sealing plate 16.2 and the cylinder 12 are spaced apart, and the discharge channel and the stirring chamber are connected; the sealing plate 16.2 is driven to move by a driving element, and the sealing plate 16.2 switches between the sealed state and the open state based on the driving element driving the sealing plate 16.2 to move.
[0028] In this embodiment, when the wet shear granulator is not discharging, the sealing plate 16.2 is in a sealed state, that is, the sealing plate 16.2 and the cylinder 12 form a complete stirring chamber. The discharge channel and the stirring chamber are separated by the sealing plate 16.2. At this time, the state of the cylinder 12 is any one or more of the following: non-working state, feeding state, and stirring state. After the preparation of the wet soft material is completed inside the mixing chamber, the driving element drives the sealing plate 16.2 to move, and the sealing plate 16.2 switches from the sealed state to the open state. The sealing plate 16.2 and the cylinder 12 are spaced apart, and the discharge channel is connected to the mixing chamber. The wet soft material enters the discharge channel through the discharge port 15 and is then discharged from the cylinder 12. After the wet soft material is discharged, the spray gun 16.1 on the sealing plate 16.2 blows the wet soft material accumulated at the discharge port 15 into the mixing chamber inside the cylinder 12, preventing the wet soft material from accumulating at the discharge port 15. The driving element drives the sealing plate 16.2 to move, and the sealing plate 16.2 switches from the open state to the sealed state, completing the material discharge. This embodiment solves the problems of dust flying caused by the residual material not sealing the outlet 15 properly and affecting the subsequent granulation process, and increasing the labor intensity of personnel by setting a spray gun 16.1 on the sealing plate after the wet soft material is discharged. After the wet soft material is discharged, the spray gun 16.1.12 on the spray gun 16.1 blows away the residual material on the outlet 15. This is achieved by setting a spray gun 16.1 on the sealing plate after the wet soft material is discharged.
[0029] In this embodiment, the discharge valve 16 includes a spray gun 16.1 and a sealing plate 16.2. The discharge valve 16 controls the connection between the discharge channel and the mixing chamber through the sealing plate 16.2. In this embodiment, the number of spray guns 16.1 on the sealing plate 16.2 can be set according to actual conditions. In this embodiment, it is preferred to have 8 spray guns. The residual material on the discharge port 15 is blown away by the spray nozzles 16.1.12 on the spray guns 16.1, which solves the problem of dust flying caused by the residual material not sealing the discharge port 15 and the sealing plate 16.2 tightly. By cleaning the residual material online, the phenomenon of the production line being unable to continue production due to personnel stopping the machine for cleaning is avoided. At the same time, it can also reduce the labor intensity of personnel cleaning and ensure the safety and occupational health of personnel. Moreover, this utility model can ensure the durability of the high-speed shearing granulator without changing the thickness of the cylinder wall, and completely solves the problem of residual material affecting the sealing of the high-speed shearing granulator during the unloading process, thereby causing the spraying phenomenon.
[0030] Further optimizing the design, the spray gun 16.1 includes a spray gun body 16.1.1, a nozzle 16.1.2, a first conduit 16.1.4, and a drive assembly. The spray gun body 16.1.1 has an internal mounting cavity, and a spray nozzle 16.1.12 is provided at one end of the mounting cavity. The nozzle 16.1.2 is slidably disposed within the mounting cavity, and the spray nozzle 16.1.12 is positioned along the sliding trajectory of the nozzle 16.1.2. Furthermore, the end of the gun needle 16.1.2 near the nozzle 16.1.12 is a sealed end, and the nozzle 16.1.12 is detachably connected to the sealed end; the gun needle 16.1.2 and the spray gun body 16.1.1 together form a guiding cavity 16.1.13 on the side near the nozzle 16.1.12, and the guiding cavity 16.1.13 is connected to the first pipeline 16.1.4; the drive assembly is used to drive the gun needle 16.1.2 to slide in the mounting cavity.
[0031] Compared with existing ordinary nozzles, the spray gun 16.1 in this embodiment is provided with a gun needle 16.1.2 inside. When the spray gun 16.1 is not in operation, the sealing end of the gun needle 16.1.2 and the spray nozzle 16.1.12 are in a connected state, that is, a sealed state, to prevent the material in the mixing chamber from entering the mounting cavity inside the spray gun 16.1, which would affect the sliding of the gun needle 16.1.2 and the unobstructed flow of the guide cavity 16.1.13. When the spray gun 16.1 needs to start working, the drive assembly drives the needle 16.1.2 to slide within the mounting cavity, separating the sealing end of the needle 16.1.2 from the nozzle 16.1.12, creating a spraying space between them. The nozzle 16.1.12, the guiding cavity 16.1.13, and the first pipe 16.1.4 are connected, and compressed air or high-pressure airflow is supplied to the guiding cavity 16.1.13 through the first pipe 16.1.4. The compressed air or high-pressure airflow is then ejected through the nozzle 16.1.12, thus achieving the spraying function. After the spraying operation is completed, the first pipe 16.1.4 stops supplying fluid to the guiding cavity 16.1.13, and the drive assembly drives the needle 16.1.2 to slide within the mounting cavity, connecting the sealing end of the needle 16.1.2 with the nozzle 16.1.12 to form a sealed state.
[0032] In this embodiment, the drive assembly can be mechanically driven, hydraulically driven, or pneumatically driven. When the drive assembly is mechanically driven, it can be a screw-nut combination transmission, where the screw drives the nut to move along the screw axis. The nut is detachably connected to the gun needle 16.1.2, thereby driving the gun needle 16.1.2 to slide within the mounting cavity. When the drive assembly is hydraulically driven, it uses a cylinder or hydraulic cylinder, where the telescopic end of the cylinder or hydraulic cylinder is connected to the gun needle 16.1.2, driving the gun needle 16.1.2 to slide within the mounting cavity. However, both of these drive methods require a large installation space and are costly.
[0033] In a further optimized design, the drive assembly is pneumatically driven. Specifically, the gun needle 16.1.2 and the spray gun body 16.1.1 enclose a sealed cavity 16.1.14 on the side away from the nozzle 16.1.12. The drive assembly includes a second pipe 16.1.3 that communicates with the sealed cavity 16.1.14. The connecting cavity 16.1.13 is a sealed chamber. Based on the pressure difference between the sealed cavity 16.1.14 and the connecting cavity 16.1.13, the gun needle 16.1.2 slides within the mounting cavity.
[0034] In this embodiment, compressed air is supplied to the through cavity 16.1.13 through the first pipe 16.1.4, and compressed air is supplied to the sealing cavity 16.1.14 through the second pipe 16.1.3. When it is necessary to open the nozzle 16.1.12, compressed air is supplied to the through cavity 16.1.13 through the first pipe 16.1.4. At this time, the through cavity 16.1.13 is still in a sealed state. When the air pressure in the through cavity 16.1.13 is greater than the air pressure in the sealing cavity 16.1.14, the gun needle 16.1.2 slides away from the nozzle 16.1.12 in the mounting cavity. Pipeline 16.1.4 continuously supplies compressed air to the guiding cavity 16.1.13 until the air pressure in the guiding cavity 16.1.13 and the air pressure in the sealing cavity 16.1.14 are the same. At this point, the needle 16.1.2 stops moving. Due to the sliding of the needle 16.1.2, the sealing end of the needle 16.1.2 and the spray port 16.1.12 are separated, creating a spray space between them. The compressed air in the guiding cavity 16.1.13 is sprayed from the spray space to blow away the residual material on the discharge port 15, thus solving the problem of dust flying caused by the residual material not sealing the discharge port 15 and the sealing plate 16.2 properly.
[0035] When the blowing operation is completed and the blowing port 16.1.12 needs to be closed, the first pipeline 16.1.4 stops supplying compressed air to the guiding cavity 16.1.13, and supplies compressed air to the sealing cavity 16.1.14 through the second pipeline 16.1.3. When the air pressure in the sealing cavity 16.1.14 is greater than the air pressure in the guiding cavity 16.1.13, the gun needle 16.1.2 slides towards the side closer to the blowing port 16.1.12 in the mounting cavity until the sealing end of the gun needle 16.1.2 and the blowing port 16.1.12 are in a connected state, i.e., a sealed state. Compared with mechanical and hydraulic drives, the pneumatic transmission used in this embodiment occupies less space and has stronger controllability. Furthermore, the drive assembly in this embodiment utilizes the original first pipeline 16.1.4 and the conducting cavity 16.1.13, combined with the second pipeline 16.1.3 and the sealing cavity 16.1.14, to enable the gun needle 16.1.2 to slide within the mounting cavity, further reducing the size of the drive assembly.
[0036] In a further optimized design, a sliding plate 16.1.15 is detachably connected to the outer circumference of the gun needle 16.1.2, and the sliding plate 16.1.15 is slidably disposed within the mounting cavity; the sealing cavity 16.1.14 and the conducting cavity 16.1.13 are respectively disposed on both sides of the sliding plate 16.1.15, and the first conducting port of the conducting cavity 16.1.13 and the first conducting port of the first pipeline 16.1.4, and the second conducting port of the sealing cavity 16.1.14 and the second pipeline 16.1.3 are respectively disposed on both sides of the sliding plate 16.1.15. The sealing cavity 16.1.14 and the conducting cavity 16.1.13 are separated by a sliding plate 16.1.15, which also enables relative sliding between the gun needle 16.1.2 and the mounting cavity. The movement generated by the pressure difference between the conducting cavity 16.1.13 and the sealing cavity 16.1.14 is also transmitted to the gun needle 16.1.2 via the sliding plate 16.1.15. In this embodiment, the gun needle 16.1.2 and the sliding plate 16.1.15 can be an integral structure or a separate structure. When it is a separate structure, the gun needle 16.1.2 and the sliding plate 16.1.15 are detachably connected.
[0037] Preferably, a first sealing ring 16.1.5 is fitted on the side of the gun needle 16.1.2 away from the sealing end. The first sealing ring 16.1.5 is sealed to the spray gun body 16.1.1 and is detachably connected. The first sealing ring 16.1.5, the gun needle 16.1.2, the sliding plate 16.1.15 and the spray gun body 16.1.1 together form a sealing cavity 16.1.14. The end of the gun needle 16.1.2 away from the nozzle 16.1.12 passes through the first sealing ring 16.1.5, and the sealing performance of the sealing cavity 16.1.14 is enhanced by the first sealing ring 16.1.5.
[0038] In this embodiment, the end of the spray gun body 16.1.1 away from the nozzle 16.1.12 can be either an open end or a sealed end. When the end of the spray gun body 16.1.1 away from the nozzle 16.1.12 is a sealed end, a certain moving distance is provided between the spray gun body 16.1.1 and the needle 16.1.2 at that end position to ensure that the needle 16.1.2 can slide normally. In this case, the first sealing ring 16.1.5 can be omitted, but it can also be arranged.
[0039] In a further optimized design, the end of the spray gun body 16.1.1 furthest from the nozzle 16.1.12 is an open end. A stop block 16.1.6 is detachably connected to the side of the open end of the spray gun body 16.1.1 facing away from the nozzle 16.1.12. The distance between the stop block 16.1.6 and the needle 16.1.2 is no greater than the distance between the first and second guide ports. The stop block 16.1.6 restricts the movement distance of the needle 16.1.2. Since the end of the spray gun body 16.1.1 furthest from the nozzle 16.1.12 is an open end, the side of the first sealing ring 16.1.5 facing away from the sealing cavity 16.1.14 is at atmospheric pressure. When it is necessary to close the nozzle 16.1.12, only a small pressure airflow is needed to move the needle 16.1.2, without needing additional pressure to overcome the pressure on the side of the first sealing ring 16.1.5 facing away from the sealing cavity 16.1.14.
[0040] Preferably, a second sealing ring 16.1.7 is provided between the sliding plate 16.1.15 and the inner wall of the spray gun body 16.1.1. The second sealing ring 16.1.7 and the sliding plate 16.1.15 are detachably connected, and the sealing between the guide cavity 16.1.13 and the sealing cavity 16.1.14 is ensured by the second sealing ring 16.1.7.
[0041] To further optimize the design, a first control valve 16.1.10 and a first pressure regulating valve 16.1.11 are installed on the first pipeline 16.1.4; a second control valve 16.1.8 and a second pressure regulating valve 16.1.9 are installed on the second pipeline 16.1.3. The first control valve 16.1.10 controls the supply of compressed air from the first pipeline 16.1.4 to the passage cavity 16.1.13, and the first pressure regulating valve 16.1.11 regulates the pressure of the compressed air in the first pipeline 16.1.4. Similarly, the second control valve 16.1.8 controls the supply of compressed air from the second pipeline 16.1.3 to the sealing cavity 16.1.14, and the second pressure regulating valve 16.1.9 regulates the pressure of the compressed gas supplied to the passage cavity 16.1.13 and the sealing cavity 16.1.14, thereby further controlling the pressure of the compressed gas supplied to both the passage cavity 16.1.13 and the sealing cavity 16.1.14.
[0042] In this embodiment, the driving element is driven in the radial direction of the cylinder 12, such as... Figure 2As shown, this state is a sealed state. When the sealing plate 16.2 switches from the sealed state to the open state, the driving element drives the sealing plate 16.2 to move radially away from the cylinder 12. The discharge pipe 21 can adopt a T-shaped structure, a bent structure (similar to a number 7 shape), etc. Preferably, the discharge pipe 21 is a T-shaped structure, and the discharge pipe 21 is provided with mutually perpendicular and interconnected through channels and blind channels. The through channels are distributed radially along the cylinder 12. The sealing plate 16.2 is slidably disposed in the through channels, and the driving element is disposed in the through channels. The discharge channel includes a blind channel and a through channel near the discharge port 15. The outlet end of the blind channel is lower than the height of the discharge port 15. In this embodiment, the driving element is disposed in the through channel, and the sealing plate 16.2 is slidably disposed in the through channel. The driving element drives the sealing plate 16.2 to slide in the through channel, realizing the switching between the sealed state and the open state of the sealing plate 16.2. In this embodiment, the exit end of the tactile paving is 15 cm lower than the discharge port, that is, the vertical section of the T-shaped structure is inclined downward or arranged vertically to ensure that the wet soft material can be discharged normally.
[0043] In a further optimized design, the driving element is a cylinder 20. The fixed end of the cylinder 20 is detachably connected to the end of the through channel away from the discharge port 15, and the telescopic end of the cylinder 20 is detachably connected to the sealing plate 16.2. Of course, the driving element can also be a hydraulic cylinder or other components.
[0044] In this embodiment, the wet shear granulator also includes a top cover 11 detachably connected to the top of the cylinder 12. The top cover 11 has a viewing window 10, through which the operator can observe the conditions inside the mixing chamber. The top cover 11 is connected to and communicates with a feeding mechanism. The feeding mechanism includes a powder feeding assembly and a liquid feeding assembly. The powder feeding assembly includes a powder inlet 1, which is fixedly located at the top of the top cover 11. A powder feeding valve is provided at the powder inlet 1, controlling the entry of powder into the cylinder 12. The liquid feeding assembly includes a liquid feeding pipe 7, one end of which is fixedly connected to the top of the top cover 11, and the end of the liquid feeding pipe 7 extending into the mixing chamber is also equipped with a nozzle 8. The other end of the liquid feeding pipe 7 is connected to and communicates with a liquid storage tank 3. A liquid feeding valve 6 is provided between the liquid storage tank 3 and the liquid feeding pipe 7. The liquid storage tank 3 is also connected to and communicates with a compressed air inlet pipe 4, and a compressed air inlet valve 5 is provided between the compressed air inlet pipe 4 and the liquid storage tank 3. Compressed air is added to the liquid storage tank 3 through the compressed air inlet pipe 4 and the compressed air inlet valve 5. When the liquid feeding valve 6 is in the open state, the liquid is rapidly sprayed into the mixing chamber through the liquid feeding pipe 7 and the nozzle 8 under the action of compressed air, thus realizing liquid feeding. A dust removal filter cartridge 9 is provided on the top cover 11 to balance the pressure in the mixing chamber, prevent the pressure in the mixing chamber from increasing and causing an explosion, and prevent dust from flowing out of the mixing chamber during the process of adding powder into the mixing chamber and during the powder mixing process.
[0045] A stirring paddle 13 is rotatably connected to the bottom of the mixing chamber of the cylinder 12. The stirring paddle 13 is driven by a stirring motor 17, which is located on the outer bottom of the cylinder 12. The stirring motor 17 drives the stirring paddle 13 to rotate, thus mixing the powder and, later, the powder and liquid. A shearing blade 14 is rotatably mounted on the side wall of the mixing chamber of the cylinder 12. The shearing blade 14 is driven by a shearing blade motor 18, which is located on the outer side of the cylinder 12. The wet shearing granulator discharges material through the discharge port 15 under the action of centrifugal force, caused by the stirring action of the stirring paddle 13, so that the wet soft material enters the next process.
[0046] The wet shearing granulator also includes a control panel 19, which is electrically connected to components such as a compressed air inlet valve 5, a liquid outlet valve 6, a powder inlet valve, an outlet valve 16 (second control valve 16.1.8, first control valve 16.1.10, second pressure regulating valve 16.1.9, and first pressure regulating valve 16.1.11), a stirring motor 17, a shearing blade motor 18, and a cylinder 20. The control panel 19 is programmed with an automatic control system to control the compressed air pressure and spraying time of the spray gun 16.1. The spraying start-up and closing times and spraying pressure are designed and implemented by the automatic control program. The specific times and spraying pressures are obtained through experimental verification based on the fluidity and residual amount of the soft material.
[0047] Working process of wet shear granulator:
[0048] Step 1: Set up the automated control program. On the control panel 19, set the dry powder mixing time (only the stirring paddle 13 operates), wet mixing time (the stirring paddle 13 and the shearing blade 14 operate simultaneously), discharge time, blowing time and blowing pressure, and closing time of the discharge gate.
[0049] Step 2: Open the powder feed valve. The main material (nutrients) and auxiliary materials enter the mixing chamber inside the cylinder through the powder feed port 1, and dry powder mixing begins under the action of the stirring paddle 13.
[0050] Step 3: After the dry powder mixing time is over, open the compressed air inlet valve 5. Compressed air enters the liquid storage tank 3 from the compressed air inlet pipe 4. When the pressure reaches 0.25MPa, open the liquid outlet valve 6. The adhesive solution enters the mixing chamber from the liquid inlet pipe 7 after being atomized by the nozzle and comes into contact with the dry powder. Under the action of the stirring paddle 13 and the shearing blade 14, the dry powder and the adhesive solution or wetting agent are wetted, agglomerated, and adhered to form a wet soft material with a certain plasticity.
[0051] Step 4: After the wet mixing time is over, the discharge valve 16 is opened, and the mixed soft material is discharged from the discharge port 15 under the action of the stirring paddle, and enters the next process.
[0052] The granulation methods widely used in production include wet granulation and dry granulation. The appropriate granulation method can be selected according to the characteristics of the required particles. Among them, wet granulation is the most widely used. In the feed additive industry, wet granulation technology can: (1) improve powder flowability and adjust powder bulk density, and prevent dust from flying and adhering to the container wall during use. (2) Through wet granulation technology, nutrients can be prepared into granules, which is convenient for subsequent controlled-release coating, thereby improving bioavailability and ensuring animal health.
[0053] The wet granulation process includes: dry powder mixing, soft material preparation, extrusion granulation, spheronization, drying, and sieving. Dry powder mixing and soft material preparation can be completed in a high-speed shear granulator. First, nutrients and excipients are mixed evenly by the agitator at the bottom of the high-speed shear granulator. Then, the binder solution or wetting agent is atomized into small droplets by a spray gun and sprayed onto the mixed dry powder. The dry powder is wetted, agglomerated, and adheres to form a wet material under the liquid bridging effect of the binder solution or wetting agent. The wet material is then cut into uniformly sized, plastic, wet soft materials by the shear blades on the side walls. The wet soft materials are discharged from the outlet under the centrifugal force of the agitator, completing the unloading process.
[0054] The above description of the embodiments is only for the purpose of helping to understand the method and core idea of this application; at the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of this application. Therefore, the content of this specification should not be construed as a limitation of this application.
[0055] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.
[0056] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0057] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.
Claims
1. A wet shear granulator, characterized in that, The utility model relates to a kind of agitator, including Cylinder (12), the stirring cavity for stirring material is arranged inside for the cylinder (12), the discharge port (15) is opened in the inner wall bottom of the cylinder (12); Discharge pipe body (21), the discharge passage is arranged inside in the discharge pipe body (21), the feed end of the discharge passage and the discharge port (15) of the cylinder (12) are communicated; Sealing plate (16.2), the sealing plate (16.2) is arranged outside the cylinder (12), the sealing plate (16.2) is provided with spray gun (16.1), one end of the spray gun (16.1) is provided with blowing port (16.1.12) and is arranged towards the discharge port (15) and penetrates the sealing plate (16.2);The sealing plate (16.2) includes sealing state and open state: When the sealing plate (16.2) is in sealing state, the sealing plate (16.2) forms a complete stirring cavity with cylinder (12), the discharge passage and the stirring cavity are arranged separately by sealing plate (16.2);When the sealing plate (16.2) is in open state, the sealing plate (16.2) and the cylinder (12) are arranged at intervals, the discharge passage and the stirring cavity are communicated;The sealing plate (16.2) is driven to move by driving element, based on the driving element driving the sealing plate (16.2) to move, the sealing plate (16.2) switches between sealing state and open state.
2. The wet shear granulator of claim 1, wherein, The spray gun (16.1) includes: Spray gun body (16.1.1), the mounting cavity is arranged inside in the spray gun body (16.1.1), and the blowing port (16.1.12) is arranged at one end of the mounting cavity; Gun needle (16.1.2), the gun needle (16.1.2) is slidably arranged in the mounting cavity, the blowing port (16.1.12) is arranged on the sliding track of the gun needle (16.1.2), and one end of the gun needle (16.1.2) close to the blowing port (16.1.12) is a sealed end, and the blowing port (16.1.12) is detachably connected with the sealed end; First pipeline (16.1.4), the gun needle (16.1.2) and the spray gun body (16.1.1) are enclosed to form a through cavity (16.1.13) on the side close to the blowing port (16.1.12), and the through cavity (16.1.13) is communicated with the first pipeline (16.1.4); Driving assembly, the driving assembly is used to drive the gun needle (16.1.2) to slide in the mounting cavity.
3. The wet shear granulator of claim 2, wherein, The gun needle (16.1.2) and the spray gun body (16.1.1) are enclosed to form a sealing cavity (16.1.14) on the side away from the blowing port (16.1.12), the driving assembly includes the second pipeline (16.1.3) communicated with the sealing cavity (16.1.14), the through cavity (16.1.13) is a sealed chamber, based on the pressure difference of sealing cavity (16.1.14) and through cavity (16.1.13), the gun needle (16.1.2) slides in the mounting cavity.
4. The wet shear granulator of claim 3, wherein, The gun needle (16.1.2) is detachably connected with a sliding plate (16.1.15) on the outer side in the circumferential direction, the sliding plate (16.1.15) is slidingly arranged in the mounting cavity; the sealing cavity (16.1.14) and the conducting cavity (16.1.13) are arranged on the two sides of the sliding plate (16.1.15), and the conducting cavity (16.1.13) and the first conducting port of the first pipeline (16.1.4), the sealing cavity (16.1.14) and the second conducting port of the second pipeline (16.1.3) are arranged on the two sides of the sliding plate (16.1.15).
5. The wet shear granulator of claim 4, wherein, The gun needle (16.1.2) is detachably connected with a sliding plate (16.1.15) on the outer side in the circumferential direction, the sliding plate (16.1.15) is slidingly arranged in the mounting cavity; the sealing cavity (16.1.14) and the conducting cavity (16.1.13) are arranged on the two sides of the sliding plate (16.1.15), and the conducting cavity (16.1.13) and the first conducting port of the first pipeline (16.1.4), the sealing cavity (16.1.14) and the second conducting port of the second pipeline (16.1.3) are arranged on the two sides of the sliding plate (16.1.15).
6. The wet shear granulator of claim 5, wherein, The gun needle (16.1.2) is detachably connected with a sliding plate (16.1.15) on the outer side in the circumferential direction, the sliding plate (16.1.15) is slidingly arranged in the mounting cavity; the sealing cavity (16.1.14) and the conducting cavity (16.1.13) are arranged on the two sides of the sliding plate (16.1.15), and the conducting cavity (16.1.13) and the first conducting port of the first pipeline (16.1.4), the sealing cavity (16.1.14) and the second conducting port of the second pipeline (16.1.3) are arranged on the two sides of the sliding plate (16.1.15).
7. The wet shear granulator of claim 4, wherein, The gun needle (16.1.2) is detachably connected with a sliding plate (16.1.15) on the outer side in the circumferential direction, the sliding plate (16.1.15) is slidingly arranged in the mounting cavity; the sealing cavity (16.1.14) and the conducting cavity (16.1.13) are arranged on the two sides of the sliding plate (16.1.15), and the conducting cavity (16.1.13) and the first conducting port of the first pipeline (16.1.4), the sealing cavity (16.1.14) and the second conducting port of the second pipeline (16.1.3) are arranged on the two sides of the sliding plate (16.1.15).
8. The wet shear granulator of claim 4, wherein, The first pipeline (16.1.4) is provided with a first control valve (16.1.10) and a first pressure regulating valve (16.1.11); the second pipeline (16.1.3) is provided with a second control valve (16.1.8) and a second pressure regulating valve (16.1.9).
9. The wet shear granulator of claim 1, wherein, The discharge pipe body (21) is T-shaped structure, the discharge pipe body (21) is provided with through channel and blind way that are perpendicular and are conducted inside, the through channel is distributed along the cylinder (12) radially, the sealing plate (16.2) is slidingly arranged in the through channel, and the drive element is arranged in the through channel; the discharge channel includes blind way and the through channel close to the outlet (15) side, and the outlet end of the blind way is lower than the height of the outlet (15).
10. The wet shear granulator of claim 1, wherein, The drive element is a cylinder (20), and the fixed end of the cylinder (20) is detachably connected to one end of the through channel away from the outlet (15). The telescopic end of the cylinder (20) is detachably connected with the sealing plate (16.2).