Classification wheel capable of preventing materials from caking

Abstract

The utility model discloses a grading wheel capable of preventing materials from caking, which comprises an annular upper plate, a circular lower plate, a main framework concentrically arranged with the upper plate and the lower plate, a transmission shaft sleeved in the main framework, n blades connected with the annular upper plate and the circular lower plate, and a blade support tube connected with the blades and the main framework, the transmission shaft is provided with a main gas path and a plurality of branch gas paths, the branch gas paths are communicated with the M branch paths, the blade supporting pipe comprises a hollow supporting pipe and a solid supporting pipe, m through holes are formed in the blade, m is larger than or equal to n, and the branch gas paths are communicated with the through holes formed in the blade through the hollow supporting pipe. An external air source can blow and sweep material particles hovering around the blades of the grading wheel for a long time, rapid friction between the hovering particles and the blades of the grading wheel is avoided, and then heat generation caused by long-time friction between the blades of the grading wheel and the hovering material particles is effectively avoided; therefore, the materials with low melting points enter a molten state during grading or crushing so as to be caked and further adhered to the blades of the grading wheel.

Description

Technical Field

[0001] This utility model relates to the field of material crushing, and in particular to a grading wheel for preventing material agglomeration. Background Technology

[0002] Classifying wheels, as a common tool for material classification, are widely used in the crushing and classification of polymer materials. During normal operation, ordinary classifying wheels often experience situations where low-weight, small-diameter materials remain suspended on the outer side of the wheel. In this case, prolonged friction between the classifying wheel blades and the suspended material particles generates heat. If the material has a low melting point, the suspended particles may melt or clump together and adhere to the classifying wheel blades. This increases the weight of the classifying wheel, raises the energy consumption of the classifying motor, and reduces classification capacity. Furthermore, during tangential cutting, incomplete cleaning of the adhered parts can lead to potential material contamination.

[0003] Therefore, there is an urgent need for a classifying wheel that can improve or prevent material particles from lingering on the outside of the classifying wheel for too long. Summary of the Invention

[0004] Force analysis of the material particles located outside the classifier wheel reveals the following general force distribution: ① The upward buoyancy force provided by the fan is greater than or equal to the downward gravity force, and the inward centripetal force provided by the fan is greater than the outward centrifugal force exerted by the classifier wheel blades on the material. ② The upward buoyancy force provided by the fan is greater than or equal to the downward gravity force, and the inward centripetal force provided by the fan is less than or equal to the outward centrifugal force exerted by the classifier wheel blades on the material. In case ①, the material particles are drawn into the classifier wheel, thus achieving the coarse-fine classification of solid particles. In case ②, because the material particles cannot escape the centrifugal force exerted by the classifier wheel blades, this results in a prolonged suspension outside the classifier wheel.

[0005] This utility model discloses a classifying wheel to prevent material agglomeration. By setting an air passage in the drive shaft of the classifying wheel and setting through holes in the blades, the two are connected to the air passage through the main frame branch and hollow support pipe. This allows an external air source to blow away material particles that have been suspended around the classifying wheel blades for a long time, avoiding rapid friction between the suspended particles and the classifying wheel blades. This effectively prevents the classifying wheel blades from generating heat due to prolonged friction between the suspended material particles and the classifying wheel blades, which would otherwise cause materials with low melting points to enter a melting or molten state during classification or crushing, thus causing agglomeration and adhesion to the classifying wheel blades.

[0006] A classifying wheel for preventing material agglomeration, characterized in that it comprises:

[0007] The main framework, which includes N branches;

[0008] A drive shaft is fitted inside the main frame. The drive shaft includes a main air passage and branch air passages. The main air passage is a single-opening structure. The branch air passages and M branch air passages are connected.

[0009] An annular upper plate, the center of which is concentric with the center of the main frame;

[0010] A circular lower plate, the center of which is concentric with the center of the main frame;

[0011] The n blades are respectively fixedly connected to the annular upper plate and the circular lower plate;

[0012] The blade support tube includes a hollow support tube and a solid support tube, the blade support tube being connected to the blade and the main frame respectively, wherein the branch air passage passes through the interior of the hollow support tube;

[0013] m of the blades are provided with through holes, where m ≥ n.

[0014] Preferably, the through hole is connected to the branch air passage to ensure that the external air source gas can be blown from the inside to the outside along the air passage channel, the main air passage of the drive shaft, the branch air passage, the main frame branch passage, the hollow support tube, and the blade through hole.

[0015] In one embodiment, the relationship between the number of branches N and the blade height H is: N = H / 10 * 4, where N is a natural number and H is in centimeters.

[0016] In one embodiment, m of the blades are provided with the through holes, wherein n≤m≤3n.

[0017] In one embodiment, the N≤M <N。

[0018] In one embodiment, the hollow support tube and the solid support tube are arranged to cross each other in the vertical direction.

[0019] In one embodiment, the hollow support tubes and the solid support tubes are arranged intersectingly on the same horizontal plane around the main frame.

[0020] In one embodiment, there is an angle θ between a single blade and the support tube, where 0°≤θ≤75°.

[0021] In one embodiment, the annular upper plate includes a connector that connects the annular upper plate and the main frame.

[0022] In one embodiment, a first keyway is provided on the inner side of the main frame, and a second keyway is provided on the outer side of the drive shaft. Tangential keys are provided in the first keyway and the second keyway.

[0023] In one embodiment, the end of the drive shaft near the circular lower plate is provided with an external thread to prevent the drive shaft from slipping.

[0024] Technical effect

[0025] 1. This utility model prevents material particles suspended on the outside of the classifying wheel from melting and adhering to the classifying wheel blades after being melted by setting an air passage on the drive shaft and setting through holes on the blades. The air is transmitted through the air passage pipeline of the drive shaft main air passage - branch air passage - main frame branch passage - hollow support tube - blade through hole. This not only reduces the energy consumption of the motor and increases the production capacity of the classifying wheel, but also avoids incomplete cleaning caused by stubborn adhesion during the cutting process, effectively avoiding potential material contamination problems.

[0026] 2. To ensure that the classifier does not deform under strong rotation, solid support tubes and hollow support tubes are arranged in a longitudinal cross pattern; around the main frame, on the same horizontal plane, solid support tubes and hollow support tubes are also arranged in a cross pattern, thereby ensuring that gas is released outward from all sides of the classifier blades at the same time. Attached Figure Description

[0027] Figure 1 This is a front view of a grading wheel according to the present invention;

[0028] Figure 2 This is a top view of the annular upper plate of the graded wheel according to the present invention;

[0029] Figure 3 This is a top view of a grading wheel according to the present invention, as well as a partial enlarged view of the blades and blade support tubes;

[0030] Figure 4 This is a schematic diagram showing the main frame of a grading wheel and the keyway on the drive shaft according to this utility model. Detailed Implementation

[0031] To facilitate understanding of this utility model, a more comprehensive description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described below. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0032] like Figure 1As shown in the figure, the utility model discloses a classification wheel 100 for preventing material caking, which includes: a main skeleton 1, a transmission shaft 2 sleeved on the main skeleton 1, an annular upper plate 3, blades 4, a circular lower plate 5 and blade support pipes 6. The main skeleton 1 is located at the center of the annular upper plate 3 and the circular lower plate 5. The blades 4 are arranged between the annular upper plate 3 and the circular lower plate 5, and the blade support pipes 6 are arranged between the blades 4 and the main skeleton 1. There are N branch paths 11 on the main skeleton 1, where N is specified according to the height H of the blades 4 of the classification wheel 100, N = H / 10 * 4, N is a natural number, and if it cannot be divided evenly, it is directly rounded up. The unit of the height H of the classification wheel 100 is centimeter. The transmission shaft 2 sleeved on the main skeleton 1 includes a main air path 21 and branch air paths 22. The branch air paths 22 are distributed at intervals along the main air path 21 longitudinally, and the branch air paths 22 are distributed at intervals around the main air path 21 on a horizontal plane. The branch air paths 22 are connected to M branch paths 11, where N ≤ M < N. Please refer to Figure 2 , the annular upper plate 3 includes a connecting member 31, and the connecting member 31 is used to connect the annular upper plate 3 and the main skeleton 1 to facilitate fixing the annular upper plate 3. Through holes 41 are provided at positions corresponding to the branch air paths 22 on the blades 4, and both ends of the blades 4 are fixedly connected to the annular upper plate 3 and the lower plate 5 respectively. The blade support pipes 6 include a solid support pipe 61 and a hollow support pipe 62, and the blade support pipes 6 are fixedly connected to the main skeleton 1 by welding. One end of the hollow support pipe 62 is connected to the branch path 11 of the main skeleton, and the other end is connected to the through hole 41 provided on the blade 4, so as to facilitate the transmission of external gas to the outside of the blade to prevent the material hovering outside from caking.

[0033] In one embodiment, the number of blades 4 is n, and m of the blades 4 are provided with through holes 41, where m ≥ n, and further preferably, n ≤ m ≤ 3n.

[0034] It should be further noted that one end of the transmission shaft 2 away from the circular lower plate 5 is open, so as to facilitate the ventilation of the main air path 21 of the transmission shaft 2, through the branch air paths 22 to each branch path 11, and then through the hollow support pipe 62 and blown out through the through hole 41.

[0035] Please refer to Figure 4 , to prevent the classification wheel 100 from having longitudinal or tangential displacement during operation, a first keyway 12 is provided on the inner side of the main skeleton 1, and a second keyway 23 is provided on the outer side of the transmission shaft 2. When the two are sleeved, it is ensured that the first keyway 12 and the second keyway 23 are arranged opposite to each other, and then the tangential key is inserted into the gap between the first keyway 12 and the second keyway 23, so as to make the transmission shaft and the classification wheel be tangentially and firmly connected to avoid tangential displacement between the two;

[0036] In addition, the end of the drive shaft 2 near the circular lower plate 5 is provided with an external thread, and the drive shaft 2 is longitudinally fixedly connected to the classifying wheel 100 by means of screw fastening, so as to prevent the classifying wheel 100 from sliding off the drive shaft 2 during rotation.

[0037] Please see further. Figure 3 There is an angle θ between blade 4 and blade support tube 6, where 0°≤θ≤75°.

[0038] It should be further explained that, in order to ensure that the classifier does not deform under strong rotation, the solid support tube 61 and the hollow support tube 62 are arranged in a longitudinal cross configuration; around the main frame 1, on the same horizontal plane, the solid support tube 61 and the hollow support tube 62 are also arranged in a cross configuration, thereby ensuring that gas is released outward from all sides of the classifier blade at the same time.

[0039] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A grading wheel for preventing material agglomeration, characterized in that, It includes: The main framework, which includes N branches; A drive shaft is fitted inside the main frame. The drive shaft includes a main air passage and branch air passages. The main air passage is a single-opening structure. The branch air passages and M branch air passages are connected. An annular upper plate, the center of which is concentric with the center of the main frame; A circular lower plate, the center of which is concentric with the center of the main frame; The annular upper plate and the circular lower plate are provided with n blades, and the two ends of the n blades are fixedly connected to the annular upper plate and the circular lower plate respectively; The blade support tube includes a hollow support tube and a solid support tube, the blade support tube being connected to the blade and the main frame respectively, wherein the branch air passage passes through the interior of the hollow support tube; m of the blades are provided with through holes, where m ≥ n.

2. A grading wheel for preventing material agglomeration according to claim 1, characterized in that: The relationship between the number N of the main frame branches and the blade height H is: N = H / 10 * 4, where N is a natural number and H is in centimeters.

3. A classifying wheel for preventing material agglomeration according to claim 1, characterized in that: The m blades are provided with the through holes, wherein n≤m≤3n.

4. A grading wheel for preventing material agglomeration according to claim 1, characterized in that: The N≤M <N。 5. A grading wheel for preventing material agglomeration according to claim 1, characterized in that: The hollow support tube and the solid support tube are arranged to cross each other in the vertical direction.

6. A classifying wheel for preventing material agglomeration according to claim 1 or 5, characterized in that: Around the main frame, on the same horizontal plane, the hollow support tubes and the solid support tubes are arranged in a cross pattern.

7. A classifying wheel for preventing material agglomeration according to claim 1, characterized in that: An angle θ exists between each blade and the support tube, where 0°≤θ≤75°.

8. A grading wheel for preventing material agglomeration according to claim 1, characterized in that: The annular upper plate includes a connector that connects the annular upper plate and the main frame.

9. A classifying wheel for preventing material agglomeration according to claim 1, characterized in that: The main frame has a first keyway on its inner side and a second keyway on its outer side. Tangential keys are provided in the first keyway and the second keyway.

10. A classifying wheel for preventing material agglomeration according to claim 1, characterized in that: The drive shaft is provided with an external thread at one end near the circular lower plate to prevent the drive shaft from slipping.

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