Double-cavity type flour mill

Abstract

The utility model discloses a double-cavity type flour mill, which relates to the field of flour mills and comprises a box body, a crushing bin is arranged in the middle of the interior of the box body, discharge bins are arranged at two ends of the box body, the crushing bin is provided with a feed hopper, each discharge bin is provided with a discharge port, a main shaft rotatably penetrates through the crushing bin and the discharge bins, and a crushing cutter and a centrifugal wind wheel are respectively arranged in the crushing bin and the discharge bins. The main shaft can drive the smashing cutter and the centrifugal wind wheel to rotate synchronously, a plurality of toothed plates are evenly arranged on the inner wall of the smashing bin, and the toothed plates gradually deviate in the rotating direction of the smashing cutter from the two ends to the middle. In the crushing process, the materials rotating along with the crushing cutter tend to gather towards the middle of the crushing bin under the guide of the toothed plate and are used for balancing lateral suction force generated by airflow to the materials, the problem that the materials are crushed insufficiently due to premature lateral deviation is avoided, and the situation that the materials which are crushed insufficiently block a filter screen is also avoided.

Description

Technical Field

[0001] This utility model relates to the field of grinding mills, and more particularly to a dual-chamber grinding mill. Background Technology

[0002] The grinding mill is used for fine crushing of straw. The crushing blades and the toothed plates in the crushing chamber crush the straw into a fine powder. The double-chamber grinding mill has symmetrically set air discharge channels on both sides of the crushing chamber. The two air discharge channels can quickly discharge the fine powder, which helps to improve the crushing efficiency. However, the air discharge channels on both sides will create an adsorption force on the material in the crushing chamber. This can easily cause the material that has not been fully crushed to move to the side prematurely due to the airflow, making it impossible to quickly and fully crush the straw. Utility Model Content

[0003] The purpose of this invention is to provide a dual-chamber grinding mill to solve the problem that the airflow generated by the blower discharge of the grinding mill can easily affect the lateral displacement of insufficiently ground materials, making it impossible to quickly and fully grind the materials.

[0004] To address the problems existing in the prior art, the technical solution of this utility model is as follows:

[0005] A dual-chamber grinding mill includes a housing. The middle part of the housing is a grinding chamber, and the two ends are discharge chambers. The grinding chamber has a feed hopper, and the discharge chamber has a discharge port. A main shaft rotates through the grinding chamber and the discharge chamber. Grinding blades and centrifugal impellers are respectively installed in the grinding chamber and the discharge chamber. The main shaft can drive the grinding blades and centrifugal impellers to rotate synchronously. Several toothed plates are evenly arranged on the inner wall of the grinding chamber. The toothed plates gradually shift from both ends to the middle in the direction of rotation of the grinding blades.

[0006] Preferably, the toothed plate is V-shaped, with the V-shaped tip pointing in the rotation direction of the crushing blade.

[0007] Preferably, the toothed plate is arc-shaped, with the arc-shaped protrusion in the middle pointing in the rotation direction of the crushing tool.

[0008] Preferably, the toothed plate has two staggered split plates, which are inclined from the edge to the center in the direction of rotation of the crushing tool.

[0009] Preferably, the toothed plate is composed of several arranged plates, and the arrangement direction of the plates protrudes from the edge to the center in the rotation direction of the crushing tool.

[0010] Preferably, a flow-gathering ring is provided on the inner wall of the box at the junction of the crushing chamber and the discharge chamber, and the inner surface of the flow-gathering ring gradually converges from the inside of the crushing chamber toward the discharge chamber.

[0011] Preferably, a filter screen is provided on the side of the flow-gathering ring near the crushing chamber.

[0012] Preferably, the filter screen is sleeved on the outside of the main shaft, and the main shaft surface is provided with limit plates on both sides of the filter screen.

[0013] Compared with related technologies, this utility model has the following beneficial effects:

[0014] This invention uses a toothed plate offset in the center towards the rotation direction of the crushing blade to crush materials. During the crushing process, the materials rotating with the crushing blade tend to gather towards the center of the crushing chamber under the guidance of the toothed plate. This balances the lateral suction force generated by the airflow on the materials, avoids the problem of insufficient crushing caused by premature lateral offset of the materials, and also avoids the problem of insufficiently crushed materials clogging the filter screen. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall external structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the internal structure of the box of this utility model.

[0017] Figure 3 This is a schematic diagram of the toothed plate of the present invention, according to embodiment one.

[0018] Figure 4 This is a schematic diagram of the toothed plate of Embodiment 2 of this utility model.

[0019] Figure 5 This is a schematic diagram of the toothed plate of embodiment three of this utility model.

[0020] Figure 6 This is a schematic diagram of the toothed plate of embodiment four of this utility model.

[0021] Figure 7 This is a schematic diagram of the positioning filter structure of the limiting plate of this utility model.

[0022] Reference numerals in the attached drawings: 1. Housing; 2. Main shaft; 3. Feed hopper; 4. Discharge port; 5. Centrifugal impeller; 6. Crushing blade; 7. Filter screen; 8. Condensing ring; 9. Toothed plate; 10. Limiting plate. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0024] Example 1: As Figure 1 , Figure 2As shown, a dual-chamber grinding mill includes a housing 1 with a cylindrical chamber. Two converging rings 8 are symmetrically fixed inside the housing 1. The inside of the housing 1, between the two converging rings 8, is a crushing chamber. The end face of the housing 1 and the converging rings 8 are a discharge chamber. The inner surface of the converging rings 8 gradually converges from the crushing chamber to the discharge chamber. The feed hopper 3 passes through the crushing chamber, and the discharge port 4 passes through the discharge chamber. The main shaft 2 rotates through the crushing chamber, the discharge chamber, and the end face of the housing 1. One end of the main shaft 2 is connected to a drive device via a belt drive. Crushing blades 6 and centrifugal impellers 5 are respectively installed in the crushing chamber and the discharge chamber. The crushing blades 6 and the centrifugal impellers 5 are connected to the main shaft 2. A filter screen 7 is installed on the side of the converging rings 8 near the crushing chamber. The middle part of the filter screen 7 is rotated and sleeved on the outside of the main shaft 2.

[0025] like Figure 3 As shown, several toothed plates 9 are evenly arranged on the inner wall of the crushing chamber. The toothed plates 9 are V-shaped, and the V-shaped tips point to the rotation direction of the crushing blades 6.

[0026] The straw material is fed into the crushing chamber through the feed hopper 3. The main shaft 2 drives the crushing blades 6 and the centrifugal impeller 5 to rotate synchronously. The crushing blades 6, together with the toothed plate 9, crush the straw. The centrifugal impeller 5 drives the airflow in the crushing chamber to carry the crushed material to the discharge chamber, and then discharges it through the discharge port 4. The material that is not fully crushed is filtered through the filter screen 7 to ensure that the material is fully crushed before being discharged.

[0027] During the process of the pulverizing blade 6 rotating and pulverizing the straw, the straw material is struck by the pulverizing blade 6 and can rotate with the pulverizing blade 6. The straw is guided by the toothed plate 9 and tends to gather towards the center of the pulverizing chamber. This is used to balance the lateral suction force generated by the airflow on the material, avoid the material from shifting to the side too early and causing insufficient pulverization, and also avoid the insufficiently pulverized material from clogging the filter screen 7.

[0028] like Figure 7 As shown, the filter screen 7 is sleeved on the outside of the main shaft 2, and the surface of the main shaft 2 is provided with limit plates 10 on both sides of the filter screen 7 to position the main shaft 2.

[0029] Example 2: Figure 4 As shown, the toothed plate 9 is arc-shaped, and the arc-shaped protrusion of the toothed plate 9 points in the direction of rotation of the crushing blade 6. The material driven to rotate by the crushing blade 6 can gather in the middle of the crushing chamber along the arc-shaped surface of the toothed plate 9 to balance the lateral suction force on the material.

[0030] Example 3: Figure 5 As shown, the toothed plate 9 has two staggered split plates. The split plates are inclined from the edge to the middle in the direction of rotation of the crushing blade 6, so that all the toothed plates 9 are distributed in a "wheat ear" shape. The material driven to rotate by the crushing blade 6 can be guided along the split plates to the middle of the crushing chamber to balance the lateral suction force on the material.

[0031] Example 4: Figure 6 As shown, the toothed plate 9 is composed of several arranged plates. The arrangement of the plates protrudes from the edge to the center in the direction of rotation of the crushing blade 6. The material driven to rotate by the crushing blade 6 can be guided along the arranged plates to the center of the crushing chamber to balance the lateral suction force on the material. In addition, the arranged plates have a more complex outer surface profile, which improves the efficiency of straw crushing.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dual-chamber grinding mill, comprising: The box (1) has a crushing chamber in the middle and a discharge chamber at both ends. The crushing chamber has a feed hopper (3) and the discharge chamber has a discharge port (4). The main shaft (2) rotates through the crushing chamber and the discharge chamber. The crushing chamber and the discharge chamber are respectively equipped with crushing blades (6) and centrifugal impellers (5). The main shaft (2) can drive the crushing blades (6) and centrifugal impellers (5) to rotate synchronously. The characteristic is that a number of toothed plates (9) are evenly arranged on the inner wall of the crushing chamber. The toothed plates (9) gradually shift from both ends to the middle towards the rotation direction of the crushing blades (6).

2. The dual-chamber grinding mill according to claim 1, characterized in that, The toothed plate (9) is V-shaped, with the V-shaped tip pointing in the rotation direction of the crushing tool (6).

3. The dual-chamber grinding mill according to claim 1, characterized in that, The toothed plate (9) is arc-shaped, and the arc-shaped protrusion of the toothed plate (9) points in the direction of rotation of the crushing tool (6).

4. The dual-chamber grinding mill according to claim 1, characterized in that, The toothed plate (9) has two staggered split plates, which are inclined from the edge to the middle in the direction of rotation of the crushing tool (6).

5. The dual-chamber grinding mill according to claim 1, characterized in that, The toothed plate (9) is composed of several arranged plates, and the arrangement of the plates protrudes from the edge to the center in the rotation direction of the crushing tool (6).

6. The dual-chamber grinding mill according to claim 1, characterized in that, The inner wall of the box (1) is provided with a flow-gathering ring (8) at the junction of the crushing chamber and the discharge chamber. The inner surface of the flow-gathering ring (8) gradually converges from the crushing chamber to the discharge chamber.

7. The dual-chamber grinding mill according to claim 6, characterized in that, The flow-gathering ring (8) is provided with a filter screen (7) on the side near the crushing chamber.

8. The dual-chamber grinding mill according to claim 7, characterized in that, The filter screen (7) is sleeved on the outside of the main shaft (2), and the surface of the main shaft (2) is provided with limit plates (10) on both sides of the filter screen (7).

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