A wet granulator with convenient stirring

Abstract

This invention provides a wet granulation machine that facilitates stirring, comprising a frame, a shell, a stirring drive mechanism, a stirring paddle mechanism, a shearing mechanism, and a connecting mechanism. The shell is mounted on the frame, and the stirring drive mechanism is mounted on the frame and passes through the shell. Multiple sets of stirring paddle mechanisms are provided and rotatably connected to the stirring drive mechanism. The shearing mechanism is vertically mounted on the frame and passes through the shell. The stirring paddle mechanism and the shearing mechanism are connected by the connecting mechanism, and the vertical movement of the shearing mechanism drives the rotation of the stirring paddle mechanism. This wet granulation machine, which facilitates stirring, is suitable for stirring materials of varying viscosities.

Description

Technical Field

[0001] This invention relates to the field of granulator technology, and more specifically to a wet granulator that is easy to stir. Background Technology

[0002] Under the "dual-carbon" strategy, biomass dense pellet fuel, as a renewable, low-carbon and environmentally friendly new energy source, has become an important alternative to fossil fuels. It is mainly made from biomass such as forestry waste (logs, branches, sawdust, etc.) and agricultural waste (straw, peanut shells, corn cobs, etc.) through crushing, mixing and pelleting processes. It has the advantages of high energy density, convenient storage and transportation, high combustion efficiency and low pollution. It is widely used in residential heating, industrial boilers, power generation and other fields, and is of great significance to promoting the efficient use of resources and environmental protection.

[0003] Wet pelleting is a core process in the processing of dense biomass fuel. It involves mixing pulverized biomass raw materials with appropriate binders and water to form a wet material with a certain degree of viscosity and plasticity. This wet material is then extruded to form uniform and dense pellet fuel. The uniformity of material mixing directly determines the strength, density, and combustion performance of the pellets, while material viscosity is a key factor affecting mixing efficiency and pellet quality. Biomass raw materials are widely available, and different types and pre-treated materials exhibit drastically different viscosity characteristics due to differences in moisture content, organic matter content, and fiber structure. These range from loose, easily dispersed, low-viscosity materials to viscous, easily agglomerated, high-viscosity materials, placing extremely high demands on the mixing adaptability of wet pellet mills.

[0004] Currently, the wet pellet mills used in the biomass densification fuel processing process mostly have fixed structure designs for their mixing mechanisms. The mixing speed, mixing blade structure, and mixing angle are usually not adjustable, and they can only be adapted to materials with a single or narrow range of viscosities. This makes it difficult to meet the mixing requirements of biomass materials with different viscosities, resulting in many technical defects. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention proposes a wet granulation machine that facilitates stirring, thereby solving the technical problem mentioned in the background that existing wet granulation machines are unable to meet the requirements of materials with different viscosities.

[0006] To solve this technical problem, the technical solution adopted by the present invention is as follows: A wet granulation machine that is easy to stir includes a frame, a shell, a stirring drive mechanism, a stirring paddle mechanism, a shearing mechanism, and a connecting mechanism; The housing is mounted on the frame, and the stirring drive mechanism is mounted on the frame and passes through the housing; The stirring paddle mechanism is provided in multiple sets and is rotatably connected to the stirring drive mechanism; The shearing mechanism is vertically mounted on the frame and passes through the housing; The stirring paddle mechanism and the shearing mechanism are connected by the connecting mechanism, and the lifting and lowering of the shearing mechanism can drive the stirring paddle mechanism to rotate.

[0007] Furthermore, the stirring drive mechanism includes a motor assembly, a drive shaft assembly, and a stirring shaft; the stirring shaft is rotatably disposed within the housing, and the stirring paddle mechanism is rotatably disposed on the stirring shaft; the drive shaft assembly is rotatably disposed on the frame and coaxially disposed within the housing, and the rotation of the drive shaft assembly can drive the stirring shaft to rotate; the motor assembly is disposed on the frame and can drive the drive shaft assembly to rotate.

[0008] Furthermore, the drive shaft assembly includes a drive shaft body and a drive shaft gear ring. The drive shaft body is rotatably mounted on the frame and passes through and is connected to the stirring shaft. The drive shaft gear ring is coaxially fixed on the drive shaft body, and the motor assembly can drive the stirring shaft gear ring to rotate.

[0009] Furthermore, the motor assembly includes a motor body and a drive gear; the motor body is mounted on the frame, and the drive gear is coaxially fixed on the output end of the motor body, and the rotation of the drive gear can drive the drive shaft assembly to rotate.

[0010] Furthermore, the stirring paddle mechanism includes a stirring paddle body, a stirring paddle shaft, and a stirring paddle gear; the stirring paddle body is rotatably mounted on the stirring shaft via the stirring paddle shaft, and the stirring paddle gear is coaxially fixed on the stirring paddle shaft at one end inside the stirring shaft; the lifting and lowering of the connecting mechanism can drive the rotation of the stirring paddle gear.

[0011] Furthermore, the connecting mechanism includes a first connecting plate, a rotating rod, a second connecting plate, a connecting ring, and a drive rack; the first connecting plate is connected to the shearing mechanism, one end of the rotating rod is connected to the first connecting plate, and the other end is rotatably connected to the second connecting plate, the second connecting plate is connected to the connecting ring, the connecting ring is connected to the drive shaft assembly, and is connected to the drive rack, the lifting and lowering of the drive rack can drive the stirring paddle mechanism to rotate.

[0012] Furthermore, the shearing mechanism includes a lifting rod, a fixed plate, and a shearing assembly; the fixed plate is fixedly mounted on the frame, the shearing assembly is slidably connected to the fixed plate, the lifting rod is fixedly mounted on the frame and connected to the shearing assembly; the housing is provided with an elongated hole, and the shearing assembly is slidably inserted into the elongated hole.

[0013] Furthermore, the shearing assembly includes a shearing motor, a shearing blade, and a shearing baffle; the shearing motor is vertically mounted on the fixed plate and connected to the telescopic end of the lifting rod; the shearing blade is coaxially fixed on the output shaft of the shearing motor, and the shearing baffle is vertically mounted inside the housing and rotatably passes through the shearing blade.

[0014] Furthermore, a scraper is provided at the end of the agitator near the bottom of the shell via a driven shaft. The agitator shaft has an arc-shaped groove through which the driven shaft can rotate. An arc-shaped plate is also provided on the driven shaft to close the arc-shaped groove. A driven gear is also coaxially provided at the end of the driven shaft located inside the agitator shaft. An arc-shaped rack is also fixed inside the agitator shaft and meshes with the driven gear. This structure facilitates the adjustment of the scraper angle, allowing it to rotate independently to the required angle as needed, thus achieving no scraping at low viscosity and scraping action of the scraper on the material at higher viscosity.

[0015] The advancements of this application compared to existing technologies are as follows: In this application, when dealing with materials of different viscosities, the angle of the stirring paddle mechanism and the height of the shearing mechanism can be changed. When dealing with materials with higher viscosities, the angle of the shearing mechanism is raised and the angle of the stirring paddle mechanism is lowered. When dealing with materials with lower viscosities, the angle of the shearing mechanism is lowered and the angle of the stirring paddle mechanism is increased. This allows the mechanism of this application to be applicable to materials of different viscosities, thus broadening its application range. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of the present invention, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0017] Figure 1 This is a schematic diagram of a wet granulation machine that is easy to stir, according to an embodiment of the present invention; Figure 2 for Figure 1 A cross-sectional schematic diagram of a wet granulation machine that facilitates stirring is shown. Figure 3 for Figure 1 A further cross-sectional schematic diagram of a wet granulation machine that facilitates stirring is shown. Figure 4 This is a schematic diagram of the agitator mechanism.

[0018] Figure label: Frame 1, Housing 2, Stirring drive mechanism 3, Motor assembly 31, Motor body 311, Drive gear 312, Drive shaft assembly 32, Drive shaft body 321, Drive shaft gear ring 322, Stirring shaft 33, Stirring paddle mechanism 4, Stirring paddle body 41, Stirring paddle rotating shaft 42, Stirring paddle gear 43, Shearing mechanism 5, Lifting rod 51, Fixing plate 52, Shearing assembly 53, Shearing motor 531, Shearing blade 532, Shearing baffle 533, Connecting mechanism 6, First connecting plate 61, Rotating rod 62, Second connecting plate 63, Connecting ring 64, Drive rack 65, Scraper 71, Driven rotating shaft 72, Arc plate 73, Driven gear 74, Arc rack 75. Detailed Implementation

[0019] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0020] Please refer to the following: Figures 1-4 This embodiment provides a wet granulation machine that is easy to stir, including a frame 1, a shell 2, a stirring drive mechanism 3, a stirring paddle mechanism 4, a shearing mechanism 5, and a connecting mechanism 6; The shell 2 is mounted on the frame 1, and the stirring drive mechanism 3 is mounted on the frame 1 and passes through the shell 2; The stirring paddle mechanism 4 is provided in multiple sets and is rotatably connected to the stirring drive mechanism 3; specifically, the stirring drive assembly drives the stirring paddle mechanism 4 to rotate around the Z-axis, and the stirring paddle mechanism 4 can rotate radially along the stirring drive mechanism 3, thereby changing its own angle.

[0021] The shearing mechanism 5 is vertically mounted on the frame 1 and passes through the housing 2; specifically, the shearing mechanism 5 moves up and down along the Z-axis, and the housing 2 maintains its sealing during the lifting process.

[0022] The stirring paddle mechanism 4 and the shearing mechanism 5 are connected by a connecting mechanism 6. The lifting and lowering of the shearing mechanism 5 can drive the stirring paddle mechanism 4 to rotate. Specifically, the lifting of the shearing mechanism 5 causes the stirring paddle mechanism 4 to rotate downward and reduce the angle with the bottom surface of the housing 2, thereby adapting to its adjustable tilt angle range of 15°~60°, which is further explained below: At low viscosity, the stirring paddle mechanism 4 is adjusted to 45°~60°, which greatly increases the axial circulation force, enhances the turbulence effect in the pot, and drives the powder to be fully suspended and rolled, so as to solve the problems of stratification, uneven dispersion, poor granulation, and excessive fine powder in low viscosity materials; at the same time, the shearing mechanism 5 is lowered to the lower part of the pot (flush with the plane of the main stirring paddle), aligned with the main circulation channel of the low viscosity material, maximizing the contact frequency between the material and the shearing field, improving the shearing efficiency, so as to solve the problems of uneven dispersion of binders, inability to break up micro-agglomerates, and difficulty in granulation; At medium viscosity, the stirring paddle mechanism 4 is adjusted to 30°~45° to balance axial circulation and radial shearing, forming a stable material flow throughout the pot to adapt to small fluctuations in the prescription viscosity and ensure mixing uniformity and particle size controllability; at the same time, the shearing mechanism 5 moves to the lower middle section of the pot for fine adjustment, forming a vertically intersecting shearing field with the main stirring paddle, taking into account both agglomeration and particle size control to adapt to fluctuations in the prescription viscosity and balance particle formation and fine powder ratio. At higher viscosity conditions, the stirring paddle mechanism 4 is adjusted to a smaller angle of 15°~30° to reduce axial lifting resistance, decrease stirring torque load, and enhance radial flow and wall adhesion, thereby alleviating the problems of slippage, torque overload, and localized agglomeration of high-viscosity materials. At the same time, the shearing mechanism 5 is raised to the upper middle part of the pot body, away from the high material density and high resistance area at the bottom of the pot, reducing torque load and avoiding the risk of high-viscosity materials sticking to the blades and causing blockage, thus solving the problems of high-viscosity materials enveloping the blade head, shearing failure, and localized overheating and degradation.

[0023] It should be understood that the viscosity range that this application can handle is also limited. In the low to medium viscosity range and in scenarios where the viscosity of the formulation fluctuates slightly, it can be adapted by changing the tilt angle of the stirring paddle and the height of the shearing mechanism 5. When dealing with extremely low or extremely high viscosity, other methods need to be applied for adaptation.

[0024] In this application, when dealing with materials of different viscosities, the angle of the stirring paddle mechanism 4 and the height of the shearing mechanism 5 can be changed. When dealing with materials with higher viscosities, the angle of the shearing mechanism 5 is raised and the angle of the stirring paddle mechanism 4 is lowered. When dealing with materials with lower viscosities, the angle of the shearing mechanism 5 is lowered and the angle of the stirring paddle mechanism 4 is increased. This allows the mechanism of this application to be applicable to materials of different viscosities, thus broadening its application range.

[0025] In other embodiments, the stirring drive mechanism 3 includes a motor assembly 31, a drive shaft assembly 32, and a stirring shaft 33. The stirring shaft 33 is rotatably disposed within the housing 2, and the stirring paddle mechanism 4 is rotatably mounted on the stirring shaft 33. The drive shaft assembly 32 is rotatably disposed on the frame 1 and coaxially disposed within the housing 2, and the rotation of the drive shaft assembly 32 can drive the stirring shaft 33 to rotate. The motor assembly 31 is disposed on the frame 1 and can drive the drive shaft assembly 32 to rotate. Specifically, the stirring shaft 33 is a hollow shaft, and the drive shaft assembly 32 is coaxially fixed inside it.

[0026] In other embodiments, the drive shaft assembly 32 includes a drive shaft body 321 and a drive shaft gear ring 322. The drive shaft body 321 is rotatably mounted on the frame 1 and passes through and is connected to the stirring shaft 33. The drive shaft gear ring 322 is coaxially fixed to the drive shaft body 321, and the motor assembly 31 can drive the gear ring of the stirring shaft 33 to rotate. It should be understood that one end of the drive shaft body 321 is located inside the stirring shaft 33, and the other end is located outside the stirring shaft 33, with its middle portion coaxially fixed to the stirring shaft 33, so that the rotation of the drive shaft body 321 can drive the rotation of the stirring shaft 33.

[0027] In other embodiments, the motor assembly 31 includes a motor body 311 and a drive gear 312; the motor body 311 is mounted on the frame 1, and the drive gear 312 is coaxially fixed on the output end of the motor body 311, and the rotation of the drive gear can drive the drive shaft assembly 32 to rotate. Specifically, the drive gear 312 meshes with the drive shaft ring gear 322.

[0028] In other embodiments, the impeller mechanism 4 includes an impeller body 41, an impeller shaft 42, and an impeller gear 43. The impeller body 41 is rotatably mounted on the impeller shaft 33 via the impeller shaft 42. The impeller gear 43 is coaxially fixed on the impeller shaft 42 at one end inside the impeller shaft 33. The lifting and lowering of the connecting mechanism 6 can drive the rotation of the impeller gear 43. Specifically, the connecting mechanism 6 can fix the angle of the impeller gear 43, keeping it at the desired angle.

[0029] In other embodiments, the connecting mechanism 6 includes a first connecting plate 61, a rotating rod 62, a second connecting plate 63, a connecting ring 64, and a drive rack 65. The first connecting plate 61 is connected to the shearing mechanism 5. One end of the rotating rod 62 is connected to the first connecting plate 61, and the other end is rotatably connected to the second connecting plate 63. The second connecting plate 63 is connected to the connecting ring 64, which is connected to the drive shaft assembly 32 and the drive rack 65. The lifting and lowering of the drive rack 65 can drive the stirring paddle mechanism 4 to rotate. Specifically, the rotating rod 62 passes through the housing 2 and is placed inside the stirring shaft 33. The connecting ring 64 is connected to the drive shaft body 321 via a spline. The rotation of the drive shaft body 321 drives the connecting ring 64 to rotate, while the lifting and lowering of the connecting ring 64 does not drive the lifting and lowering of the drive shaft body 321. The drive rack 65 is fixedly connected to the connecting ring 64 via the connecting rod, and the drive rack 65 meshes with the stirring paddle gear 43.

[0030] In other embodiments, the shearing mechanism 5 includes a lifting rod 51, a fixed plate 52, and a shearing assembly 53. The fixed plate 52 is fixed to the frame 1, and the shearing assembly 53 is slidably connected to the fixed plate 52. The lifting rod 51 is fixed to the frame 1 and connected to the shearing assembly 53. The housing 2 has an elongated hole through which the shearing assembly 53 is slidably inserted. It should be understood that the lifting of the shearing assembly 53 does not affect the sealing performance of the housing 2, and the lifting rod 51 is preferably an electrically telescopic rod.

[0031] In other embodiments, the shearing assembly 53 includes a shearing motor 531, a shearing blade 532, and a shearing baffle 533. The shearing motor 531 is vertically mounted on the fixed plate 52 and connected to the telescopic end of the lifting rod 51. The shearing blade 532 is coaxially fixed on the output shaft of the shearing motor 531. The shearing baffle 533 is vertically mounted inside the housing 2 and rotatably passes through the shearing blade 532. It should be understood that the rotation of the shearing blade 532 does not drive the rotation of the shearing baffle 533, and a spacer is preferably provided between the shearing baffle 533 and the shearing blade 532.

[0032] In other designs, a scraper 71 is provided at the end of the agitator near the bottom of the housing 2 via a driven shaft 72. An arc-shaped groove is provided on the agitator shaft 33, through which the driven shaft 72 can rotatably pass. An arc-shaped plate 73 is also provided on the driven shaft 72 to close the arc-shaped groove. A driven gear 74 is coaxially provided at the end of the driven shaft 72 located inside the agitator shaft 33. An arc-shaped rack 75 is also fixed inside the agitator shaft 33 and meshes with the driven gear 74. This structure facilitates adjustment of the angle of the scraper 71, allowing it to rotate independently to the desired angle, thus achieving a scraping effect on materials at low viscosities (no scraping) and at higher viscosities (scraping).

[0033] The aforementioned wet granulation machine, which is easy to stir, can be used to stir materials of different viscosities.

[0034] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A wet granulation machine that facilitates stirring, characterized in that, It includes a frame, housing, stirring drive mechanism, stirring paddle mechanism, shearing mechanism, and connecting mechanism; The housing is mounted on the frame, and the stirring drive mechanism is mounted on the frame and passes through the housing; The stirring paddle mechanism is provided in multiple sets and is rotatably connected to the stirring drive mechanism; The shearing mechanism is vertically mounted on the frame and passes through the housing; The stirring paddle mechanism and the shearing mechanism are connected by the connecting mechanism, and the lifting and lowering of the shearing mechanism can drive the stirring paddle mechanism to rotate.

2. The wet granulation machine for easy stirring according to claim 1, characterized in that, The stirring drive mechanism includes a motor assembly, a drive shaft assembly, and a stirring shaft; the stirring shaft is rotatably disposed within the housing, and the stirring paddle mechanism is rotatably disposed on the stirring shaft; the drive shaft assembly is rotatably disposed on the frame and coaxially disposed within the housing, and the rotation of the drive shaft assembly can drive the stirring shaft to rotate; the motor assembly is disposed on the frame and can drive the drive shaft assembly to rotate.

3. The wet granulation machine for easy stirring according to claim 2, characterized in that, The drive shaft assembly includes a drive shaft body and a drive shaft gear ring. The drive shaft body is rotatably mounted on the frame and passes through and is connected to the stirring shaft. The drive shaft gear ring is coaxially fixed on the drive shaft body, and the motor assembly can drive the stirring shaft gear ring to rotate.

4. A wet granulation machine for easy stirring according to claim 2, characterized in that, The motor assembly includes a motor body and a drive gear; the motor body is mounted on the frame, and the drive gear is coaxially fixed to the output end of the motor body, and the rotation of the drive gear can drive the drive shaft assembly to rotate.

5. A wet granulation machine for easy stirring according to claim 2, characterized in that, The stirring paddle mechanism includes a stirring paddle body, a stirring paddle shaft, and a stirring paddle gear; the stirring paddle body is rotatably mounted on the stirring shaft via the stirring paddle shaft, and the stirring paddle gear is coaxially fixed on the stirring paddle shaft at one end inside the stirring shaft; the lifting and lowering of the connecting mechanism can drive the rotation of the stirring paddle gear.

6. A wet granulation machine for easy stirring according to claim 2, characterized in that, The connecting mechanism includes a first connecting plate, a rotating rod, a second connecting plate, a connecting ring, and a drive rack; the first connecting plate is connected to the shearing mechanism, one end of the rotating rod is connected to the first connecting plate, and the other end is rotatably connected to the second connecting plate, the second connecting plate is connected to the connecting ring, the connecting ring is connected to the drive shaft assembly, and is connected to the drive rack, the lifting and lowering of the drive rack can drive the stirring paddle mechanism to rotate.

7. A wet granulation machine for easy stirring according to claim 2, characterized in that, The shearing mechanism includes a lifting rod, a fixed plate, and a shearing assembly; the fixed plate is fixed to the frame, the shearing assembly is slidably connected to the fixed plate, the lifting rod is fixed to the frame and connected to the shearing assembly; the housing is provided with an elongated hole, and the shearing assembly is slidably inserted into the elongated hole.

8. A wet granulation machine for easy stirring according to claim 7, characterized in that, The shearing assembly includes a shearing motor, a shearing blade, and a shearing baffle; the shearing motor is vertically mounted on the fixed plate and connected to the telescopic end of the lifting rod; the shearing blade is coaxially fixed on the output shaft of the shearing motor, and the shearing baffle is vertically mounted inside the housing and rotatably passes through the shearing blade.

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