A feedstuff grinding device

Abstract

The present application relates to a kind of feed raw material grinding device, effectively solve the problem that feed grinding equipment material is easy to form circulation, material falls too fast, equipment function is single or integration is not high;Solving technical scheme includes outer cylinder, filter cartridge, inner cylinder and grinding assembly, filter cartridge is coaxially installed in outer cylinder, inner cylinder is coaxially installed in filter cartridge, grinding assembly includes a shaft mounted at the axis of inner cylinder, and grinding unit is installed on the shaft;Outer cylinder top is equipped with feed inlet, bottom is equipped with discharge port, inner cylinder bottom is equipped with drop port, the outer wall of the inner cylinder is equipped with helical conveying blade;The inner wall of the inner cylinder is uniformly distributed with a plurality of spoiler blades, and the spiral direction of the helical conveying blade of the outer wall is the same as that of the helical conveying blade;The present application improves the grinding efficiency, compact structure, high space utilization, and simplifies the number and volume of equipment, reduces the cost of equipment.

Description

Technical Field

[0001] This invention relates to the field of feed processing equipment, specifically a feed raw material crushing device. Background Technology

[0002] Feed grinders typically use a main shaft to drive the grinding blades to grind raw materials, relying on the impact and cutting action of the collision between the blades and the material. However, as the blades rotate, the material gradually forms a circulating state in the same direction as the blades, which reduces the relative speed between the material and the blades, resulting in a decrease in grinding efficiency. The invention patent with application number CN200810197629.4 sets multiple protrusions on the inner wall of the shell to disrupt the circulating layer and form a turbulent layer to improve the impact effect. However, the protrusions are like rocks in a water flow; although they can create turbulence locally, they cannot change the overall flow field. Therefore, from an overall perspective, the material still has the tendency to form a circulating layer, meaning that the setting of protrusions cannot completely disrupt the circulating layer.

[0003] In addition, the material falls rapidly to the bottom after being fed into the equipment, resulting in a short interaction time between the material and the crushing blades and insufficient material crushing rate.

[0004] Furthermore, raw material crushing is generally accompanied by grinding and screening processes, usually completed by grinding mills and screening machines respectively. This involves a large number of devices, high equipment costs, and a large production space requirement. The material transfer between devices also reduces production efficiency. Although there are some crushing devices with grinding or screening functions, most of them are simply a series of devices and processes with low integration and low space utilization, resulting in complex equipment structures and large volumes. Summary of the Invention

[0005] This invention provides a feed ingredient crushing device, which aims to solve the problems of feed crushing equipment having easy material circulation, excessively fast material falling, and single or low integration of equipment functions.

[0006] The technical solution includes an outer cylinder, a filter cylinder, an inner cylinder, and a crushing assembly. The filter cylinder is coaxially installed in the outer cylinder, and the inner cylinder is coaxially installed in the filter cylinder. The crushing assembly includes a rotating shaft installed at the axis of the inner cylinder, on which a crushing unit is mounted. The top of the outer cylinder has a feed inlet and the bottom has a discharge outlet, and the bottom of the inner cylinder has a discharge outlet. The outer wall of the inner cylinder is provided with spiral conveying blades. The inner wall of the inner cylinder is evenly distributed with several turbulence-dispersing blades, which are spiral in direction and have the same spiral direction as the spiral conveying blades on the outer wall.

[0007] Both the inner cylinder and the filter cylinder are conical in shape, with the top being larger than the bottom.

[0008] The outer cylinder is fitted with a top cover via a flange. The top cover is an inverted funnel shape, and the upper end of the filter cylinder contacts the side wall of the top cover.

[0009] The crushing unit is arranged in multiple sets along the axial direction on the rotating shaft. From top to bottom, the radial dimension of the crushing unit gradually decreases. The multiple sets of crushing units are arranged in a cone shape consistent with the inner cylinder. A limiting cylinder fitted on the rotating shaft is provided between adjacent crushing units to limit the axial distance between the crushing units.

[0010] Each of the aforementioned crushing units includes multiple circumferentially distributed crushing blades and an annular mounting plate. The inner end of each crushing blade is fixed to the mounting plate with screws, and the mounting plate is engaged with the rotating shaft via a spline.

[0011] The lower end of the inner cylinder is coaxially provided with a connecting cylinder, the lower end of which penetrates the bottom of the outer cylinder. The connecting cylinder and the outer cylinder are connected by a bearing. A first gear set is installed at the lower end of the connecting cylinder. The motor drives the connecting cylinder to rotate through the first gear set, thereby driving the inner cylinder to rotate.

[0012] The lower end of the rotating shaft is coaxially inserted into the connecting cylinder, and the lower end of the rotating shaft extends out of the connecting cylinder. The rotating shaft and the connecting cylinder are connected by a bearing. The upper end of the rotating shaft is connected to the top of the outer cylinder by a bearing. A second gear set is installed at the lower end of the rotating shaft. The motor drives the crushing component to rotate through the second gear set.

[0013] A grinding rotor is installed on the rotating shaft below the crushing unit. The grinding rotor is conical, and a grinding gap is left between the outer wall of the grinding rotor and the inner wall of the inner cylinder.

[0014] The grinding rotor is splined to the shaft, and a compression spring is installed on the upper end of the grinding rotor.

[0015] The outer wall of the grinding rotor is provided with oblique or spiral patterns.

[0016] This invention utilizes the turbulent airflow generated by the turbulent blades on the inner wall of the inner cylinder when the inner cylinder rotates in opposite directions with the crushing component, as well as the impact between the turbulent blades and the material, to completely disrupt the circulation formed by the material with the crushing component, thereby ensuring that the material and the crushing blades always maintain a high relative speed and improving crushing efficiency.

[0017] The upward airflow generated by the turbulence blades as they rotate with the inner cylinder, as well as the upward force generated on the material when the turbulence blades impact the material, have the effect of slowing down the falling speed of the material, thereby extending the crushing time of the material so that the material can be more fully crushed.

[0018] This invention uses spiral conveying blades on the outer wall of the inner cylinder to circulate and crush materials, and during the material circulation process, the materials are screened by a conical filter cylinder. After crushing, the materials are ground by a grinding rotor. This invention integrates crushing, grinding, screening and circulation, resulting in a compact structure, high space utilization, and a reduction in the number and size of equipment, thus lowering equipment costs. Attached Figure Description

[0019] Figure 1 This is the front view of the present invention.

[0020] Figure 2 This is a front sectional view of the present invention.

[0021] Figure 3 This is a schematic diagram of the assembly relationship of the present invention.

[0022] Figure 4 This is a front sectional view of the outer cylinder and filter cylinder.

[0023] Figure 5 Three-dimensional inner cylinder Figure 1 .

[0024] Figure 6 Three-dimensional inner cylinder Figure 2 .

[0025] Figure 7 This is a three-dimensional view of the crushing unit. Detailed Implementation

[0026] Referring to the accompanying drawings, the present invention includes an outer cylinder 1, a filter cylinder 2, an inner cylinder 3, and a crushing assembly. The filter cylinder 2 is coaxially installed in the outer cylinder 1, and the inner cylinder 3 is coaxially installed in the filter cylinder 2. The crushing assembly includes a rotating shaft installed at the axis of the inner cylinder 3, on which a crushing unit is mounted. The upper ends of the inner cylinder 3 and the filter cylinder 2 are open. The outer cylinder 1 and the filter cylinder 2 are fixed, and the inner cylinder 3 can rotate relative to the outer cylinder 1 and the filter cylinder 2, with the rotation direction of the inner cylinder 3 opposite to that of the rotating shaft. The outer cylinder 1 has a feed inlet 4 at the top and a discharge outlet 5 at the bottom. The inner cylinder 3 has a discharge outlet 6 at the bottom. Material is fed into the inner cylinder 3 through the feed inlet 4, crushed by the crushing unit, and then falls into the bottom of the filter cylinder 2 through the discharge outlet 6 at the bottom of the inner cylinder 3. The outer wall of the inner cylinder 3 is provided with spiral conveying blades 7, the outer edge of which contacts the inner wall of the filter cylinder 2. The material falling into the bottom of the filter cylinder 2 is conveyed by the spiral conveyor. The blades 7 convey upwards. During the upward conveying process, fine materials with the required particle size fall from the filter cylinder 2 into the outer cylinder 1 and are finally discharged through the discharge port 5. Coarse materials with the required particle size return from the top of the inner cylinder 3 to the inner cylinder 3 for further crushing. The inner wall of the inner cylinder 3 is evenly distributed with several turbulence-disrupting blades 8. The turbulence-disrupting blades 8 are spiral in direction and rotate in the same direction as the spiral conveying blades 7 on the outer wall. During crushing, the inner cylinder 3 rotates in the opposite direction to the shaft. The turbulence-disrupting blades 8 generate airflow in the opposite direction to the crushing unit. At the same time, the turbulence-disrupting blades 8 collide with the material to prevent the material from forming a circulation in the same direction as the crushing unit, thereby improving the crushing efficiency. Meanwhile, when the inner cylinder 3 rotates, the turbulence-disrupting blades 8 generate an upward airflow. When the turbulence-disrupting blades 8 collide with the material, they apply an upward component force to the material, slowing down the falling speed of the material in the inner cylinder 3, so that the material is crushed more thoroughly.

[0027] Both the inner cylinder 3 and the filter cylinder 2 are conical with a larger upper part and a smaller lower part. The material has a downward force on the inner wall of the filter cylinder 2, which allows the filter cylinder 2 to discharge material better. On the other hand, the conical inner cylinder 3 has the function of gathering the material.

[0028] The outer cylinder 1 is fitted with a top cover 9 via a flange. The top cover 9 is designed to be detachable so that the inner cylinder 3 and the crushing assembly can be assembled into the outer cylinder 1. The top cover 9 is an inverted funnel shape. The upper end of the filter cylinder 2 is in contact with the side wall of the top cover 9. After the material is lifted to the top of the filter cylinder 2 by the spiral conveying blades 7, it is flipped inward into the inner cylinder 3 under the guidance of the side wall of the top cover 9.

[0029] The crushing unit is arranged in multiple sets along the axial direction on the rotating shaft. From top to bottom, the radial dimension of the crushing unit gradually decreases. The multiple sets of crushing units are arranged in a cone shape consistent with the inner cylinder 3. A limiting cylinder 10 fitted on the rotating shaft is provided between adjacent crushing units to limit the axial distance between the crushing units.

[0030] Each of the aforementioned crushing units includes multiple circumferentially distributed crushing blades 11 and an annular mounting plate 12. The inner end of each crushing blade 11 is fixed to the mounting plate 12 by screws, and the mounting plate 12 is engaged with the rotating shaft via a spline.

[0031] The lower end of the inner cylinder 3 is coaxially provided with a connecting cylinder 13, the lower end of the connecting cylinder 13 penetrates the bottom of the outer cylinder 1, and the connecting cylinder 13 and the outer cylinder 1 are connected by a bearing. The lower end of the connecting cylinder 13 is equipped with a first gear set 14, and the motor drives the connecting cylinder 13 to rotate through the first gear set 14, thereby driving the inner cylinder 3 to rotate.

[0032] The lower end of the rotating shaft is coaxially inserted into the connecting cylinder 13, and the lower end of the rotating shaft extends out of the connecting cylinder 13. The rotating shaft and the connecting cylinder 13 are connected by a bearing. The upper end of the rotating shaft is connected to the top of the outer cylinder 1 by a bearing. Both ends are installed with bearings to give the rotating shaft good stability. A second gear set 15 is installed at the lower end of the rotating shaft. The motor drives the crushing component to rotate through the second gear set 15.

[0033] A grinding rotor 16 located below the crushing unit is installed on the rotating shaft. The grinding rotor 16 is conical, and a grinding gap is left between the outer wall of the grinding rotor 16 and the inner wall of the inner cylinder 3. The crushed material after being crushed by the crushing unit is ground by the grinding rotor 16 so that it can quickly reach the required particle size.

[0034] The grinding rotor 16 is splined to the shaft, and a compression spring 17 is installed on the upper end of the grinding rotor 16. When the grinding resistance is high, the grinding rotor 16 will push the compression spring 17 upward under the action of the resistance, thereby increasing the grinding gap and promoting the rapid discharge of materials.

[0035] The outer wall of the grinding rotor 16 is provided with oblique or spiral patterns, which can promote the downward discharge of materials in the grinding gap when the grinding rotor 16 rotates.

[0036] In the crushing operation, the material to be crushed is fed into the inner cylinder 3 from the feed port 4 at the top of the outer cylinder 1. The rotating shaft and the inner cylinder 3 rotate simultaneously in opposite directions. The crushing blades 11 on the rotating shaft crush the material. The turbulence blades 8 on the inner wall of the inner cylinder 3 generate an airflow that is opposite to the direction of the crushing unit. At the same time, the turbulence blades 8 collide with the material to prevent the material from forming a circulation in the same direction as the crushing unit, thereby improving the crushing efficiency. Meanwhile, when the inner cylinder 3 rotates, the turbulence blades 8 generate an upward airflow, which slows down the falling speed of the material in the inner cylinder 3, so that the material is crushed more thoroughly.

[0037] After being crushed by the crushing component, the material falls into the grinding gap between the grinding rotor 16 and the inner cylinder 3 for grinding. After grinding, the material is discharged into the filter cylinder 2 through the discharge port 6 at the bottom of the inner cylinder 3. Then, it is lifted upward by the spiral conveying blades 7 on the outer wall of the inner cylinder 3. During the lifting process, the fine material with the standard particle size falls into the outer cylinder 1 through the filter cylinder 2 and is finally discharged from the discharge port 5. The coarse material with the standard particle size is lifted to the upper port of the inner cylinder 3 and falls back into the inner cylinder 3 for crushing and grinding again.

[0038] A feeding pipe is connected to the feed inlet 4, and a discharge pipe is connected to the discharge outlet 5 to achieve continuous crushing operation.

Claims

1. A feed ingredient grinding device, comprising an outer cylinder (1), a filter cylinder (2), an inner cylinder (3), and a grinding assembly, characterized in that, The filter cylinder (2) is coaxially installed in the outer cylinder (1), and the inner cylinder (3) is coaxially installed in the filter cylinder (2). The crushing assembly includes a rotating shaft installed on the axis of the inner cylinder (3), and a crushing unit is installed on the rotating shaft. The outer cylinder (1) has a feed inlet (4) at the top and a discharge outlet (5) at the bottom. The inner cylinder (3) has a discharge outlet (6) at the bottom. The outer wall of the inner cylinder (3) is provided with spiral conveying blades (7). The inner wall of the inner cylinder (3) is evenly distributed with several turbulence-disrupting blades (8) around its circumference. The turbulence-disrupting blades (8) are spiral in direction and have the same spiral direction as the spiral conveying blades (7) on the outer wall. The inner cylinder (3) and the filter cylinder (2) are both cone-shaped with a larger upper part and a smaller lower part. The lower end of the inner cylinder (3) is coaxially provided with a connecting cylinder (13). The lower end of the connecting cylinder (13) penetrates the bottom of the outer cylinder (1). The connecting cylinder (13) and the outer cylinder (1) are connected by a bearing. The connecting cylinder (13) is equipped with a first gear set (14) at its lower end. The motor drives the connecting cylinder (13) to rotate through the first gear set (14), which in turn drives the inner cylinder (3) to rotate. The lower end of the rotating shaft is coaxially inserted inside the connecting cylinder (13) and the lower end of the rotating shaft extends out from inside the connecting cylinder (13). The rotating shaft and the connecting cylinder (13) are connected by a bearing. The upper end of the rotating shaft is connected to the top of the outer cylinder (1) through a bearing. The lower end of the rotating shaft is equipped with a second gear set (15). The motor drives the crushing component to rotate through the second gear set (15). A grinding rotor (16) located below the crushing unit is installed on the rotating shaft. The grinding rotor (16) is conical, and a grinding gap is left between the outer wall of the grinding rotor (16) and the inner wall of the inner cylinder (3). A feeding pipe is connected to the feed port (4), and a discharge pipe is connected to the discharge port (5) to realize continuous crushing operation.

2. The feed ingredient grinding device according to claim 1, characterized in that, The top of the outer cylinder (1) is fitted with a top cover (9) via a flange. The top cover (9) is an inverted funnel shape, and the upper end of the filter cylinder (2) is in contact with the side wall of the top cover (9).

3. The feed ingredient grinding device according to claim 2, characterized in that, The crushing unit is arranged in multiple sets along the axial direction on the rotating shaft. From top to bottom, the radial dimension of the crushing unit decreases step by step. The multiple sets of crushing units are arranged in a cone shape consistent with the inner cylinder (3). A limiting cylinder (10) is provided between adjacent crushing units and fitted on the rotating shaft to limit the axial distance between the crushing units.

4. The feed ingredient grinding device according to claim 1, characterized in that, Each of the aforementioned crushing units includes multiple circumferentially distributed crushing blades (11) and an annular mounting plate (12). The inner end of each crushing blade (11) is fixed to the mounting plate (12) by screws, and the mounting plate (12) is connected to the rotating shaft via a spline.

5. The feed ingredient grinding device according to claim 1, characterized in that, The grinding rotor (16) is splined to the shaft, and a compression spring (17) is installed on the upper end of the grinding rotor (16).

6. The feed ingredient grinding device according to claim 5, characterized in that, The outer wall of the grinding rotor (16) is provided with oblique or spiral patterns.

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