Drum-type polyurethane powder screening device with dispersing tool bits

Abstract

The utility model discloses a drum-type polyurethane powder screening device with a dispersing tool bit, which comprises a shell and a dispersing device, and a drum-type screen is mounted in the shell; the dispersing device is arranged in the drum-type screen and comprises a rotating shaft and a plurality of dispersing tool bits sequentially arranged in the axis direction of the rotating shaft, and when the rotating shaft rotates, the multiple dispersing tool bits rotate so as to disperse materials in the drum-type screen; according to the drum-type screen, continuous shearing force is applied to materials in the drum-type screen, the speed of the materials passing through the drum-type screen is greatly increased, agglomeration of large materials can be prevented, and therefore the situation that the drum-type screen is blocked is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of powder screening, and more specifically to a drum-type polyurethane powder screening device with a dispersing cutter head. Background Art

[0002] Polyurethane foam (PUF) is widely used in the manufacture of automotive seats, furniture mattresses, crash padding, and thermal insulation materials due to its numerous advantages, including adjustable hardness and softness, and easy production. Currently, global annual production of PUF exceeds 12 million tons (approximately 400 million cubic meters), resulting in significant waste and serious environmental problems. Traditional methods primarily involve incineration or landfill disposal, resulting in secondary environmental pollution and waste of resources.

[0003] At present, the recycling of polyurethane waste is mainly divided into physical recycling and chemical recycling; among them, physical recycling includes crushing method, screening method, etc., which is to grind the waste polyurethane products into powder, and then screen the powder with different mesh sizes and recycle the powder.

[0004] However, polyurethane recycling typically requires the polyurethane foam to be reduced to a powder for subsequent processing. Fine powders are easier to store and process. Traditional screening equipment cannot disperse the material properly during screening, leading to accumulation and reduced screening efficiency. Furthermore, improper feeding can cause the polyurethane foam powder to clump and clog the screen. Utility Model Content

[0005] In order to overcome the deficiencies of the prior art, the utility model provides a drum-type polyurethane powder screening device with a dispersing cutter head to solve the problems of the prior art screening device easily generating heat accumulation, agglomeration and screen clogging during the screening process.

[0006] The technical solution of the utility model is as follows: A drum-type polyurethane powder screening device with a dispersing cutter head comprises:

[0007] a housing, wherein a drum-type screen is installed in the housing;

[0008] A dispersion device is arranged in the drum-type screen, and the dispersion device includes a rotating shaft and a plurality of dispersion blades arranged in sequence along the axial direction of the rotating shaft. When the rotating shaft rotates, the plurality of dispersion blades rotate to break up the material in the drum-type screen.

[0009] Furthermore, the drum-type screen includes a first screen and a leakage net, which are arranged in sequence along the forward direction of the material, a screening cavity is formed between the first screen and the dispersion head, and a waste cavity is formed between the leakage net and the dispersion head, and the screening cavity and the waste cavity are connected to allow large particle materials to be transported from the screening cavity to the waste cavity.

[0010] Furthermore, one end of the rotating shaft is connected to the first motor through a coupling, and the other end of the rotating shaft is connected to the bearing connecting seat, and the first motor is used to drive the rotating shaft to rotate.

[0011] Furthermore, the inner wall of the first screen is provided with a spiral annular convex portion and an annular screen, a plurality of screening holes are provided in the annular screen, and the annular convex portion cooperates with the dispersing cutter head to disperse the material in the screening cavity.

[0012] Furthermore, it also includes a feeding device, a discharging device and a frame. The feeding device and the frame are arranged at one end of the shell, and the discharging device is arranged below the shell.

[0013] Furthermore, the feeding device includes a feeding hopper, a driving motor and a conveying device. The conveying device is connected to the driving motor. The inner cavity of the feeding hopper is connected to the inner cavity of the conveying device. The material flows from the feeding hopper into the inner cavity of the conveying device. The conveying device pushes the material into the drum-type screen under the driving action of the driving motor.

[0014] Furthermore, the discharging device is connected to the shell, and the discharging device includes a first discharging port and a second discharging port that are isolated from each other, the first discharging port is located below the screening cavity, and the second discharging port is located below the waste cavity.

[0015] Furthermore, the bearing connecting seat is sleeved on the conveying device, and a feed cavity is provided in the bearing connecting seat, the feed cavity is communicated with the inner cavity of the conveying device, and the feed cavity is communicated with the screening cavity.

[0016] Furthermore, a gear set and a second motor are provided at one end of the drum screen, the second motor is connected to the drum screen through the gear set, and the second motor is used to drive the drum screen to rotate around the rotating shaft.

[0017] Furthermore, the conveying device includes a casing and a feed shaft arranged in the casing, one end of the feed shaft is connected to the drive motor, and the feed shaft is provided with a spirally distributed feed sheet. When the drive motor drives the feed shaft to rotate, the feed sheet rotates accordingly to push the material into the feed chamber.

[0018] According to the above-mentioned scheme, the utility model has the beneficial effects that: the utility model provides a drum-type polyurethane powder screening device with a dispersing blade head, comprising a shell and a dispersing device, a drum-type screen being installed in the shell; the dispersing device is arranged in the drum-type screen, and the dispersing device comprises a rotating shaft and a plurality of dispersing blade heads arranged in sequence along the axial direction of the rotating shaft. When the rotating shaft rotates, the plurality of dispersing blade heads rotate to break up the material in the drum-type screen, so that the material is subjected to continuous shear force in the drum-type screen, which greatly accelerates the speed at which the material passes through the drum-type screen. Secondly, it can also prevent the agglomeration of large pieces of material, thereby avoiding the clogging of the drum screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of a drum-type polyurethane powder screening device in an embodiment of the present utility model;

[0021] Figure 2 This is a front view of a drum-type polyurethane powder screening device in an embodiment of the present utility model;

[0022] Figure 3 Schematic diagram of the internal structure of the drum-type polyurethane powder screening device in an embodiment of the present utility model;

[0023] Figure 4 for Figure 3 A local enlarged schematic diagram;

[0024] Figure 5 for Figure 3 B is a partial enlarged schematic diagram.

[0025] In the figure, 1. Shell; 11. Screening chamber; 12. Waste chamber; 2. Drum screen; 21. First screen; 211. Annular protrusion; 212. Annular screen; 2121. Screening hole; 22. Leakage net; 3. Dispersing device; 31. Rotating shaft; 32. Dispersing cutter head; 33. Coupling; 34. First motor; 4. Bearing connector; 41. Feed chamber; 5. Feeding device; 51. Feed hopper; 52. Driving motor; 53. Conveying device; 531. Casing; 532. Feeding shaft; 533. Feeding sheet; 6. Discharging device; 61. First discharge port; 62. Second discharge port; 7. Frame; 8. Gear set; 9. Second motor. DETAILED DESCRIPTION

[0026] The following detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention. That is, the present invention is not limited to the described embodiments.

[0027] In order to better understand the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments:

[0028] See also Figures 1 and 2 As shown, the present embodiment provides a drum-type polyurethane powder screening device with a dispersing blade head, comprising a shell 1 and a dispersing device 3, wherein a drum-type screen 2 is installed in the shell 1; the dispersing device 3 is arranged in the drum-type screen 2, and the dispersing device 3 comprises a rotating shaft 31 and a plurality of dispersing blade heads 32 arranged in sequence along the axial direction of the rotating shaft 31. When the rotating shaft 31 rotates, the plurality of dispersing blade heads 32 rotate to break up the material in the drum-type screen 2, so that the material is subjected to continuous shear force in the drum-type screen 2, which greatly accelerates the speed at which the material passes through the drum-type screen 2. Secondly, it can also prevent the agglomeration of large pieces of material, thereby avoiding the clogging of the drum-type screen 2.

[0029] See also Figure 3 As shown, the drum screen 2 includes a first screen 21 and a leakage net 22. The first screen 21 and the leakage net 22 are arranged in sequence along the forward direction of the material. A screening chamber 11 is formed between the first screen 21 and the dispersing blade head 32, and a waste chamber 12 is formed between the leakage net 22 and the dispersing blade head 32. The screening chamber 11 and the waste chamber 12 are connected to allow large particles of material to be transported from the screening chamber 11 to the waste chamber 12. This design allows the material to pass through two screens of different sizes in sequence to achieve graded screening. The first screen 21 is used to screen out smaller-sized material particles, and the leakage net 22 is used to screen out larger-sized material particles.

[0030] See also Figure 3As shown, one end of the rotating shaft 31 is connected to the first motor 34 through a coupling 33, and the other end of the rotating shaft 31 is connected to the bearing connection seat 4. The first motor 34 is used to drive the rotating shaft 31 to rotate. In this embodiment, one end of the drum screen 2 is provided with a gear set 8 and a second motor 9. The second motor 9 is connected to the drum screen 2 through the gear set 8. The second motor 9 is used to drive the drum screen 2 to rotate around the rotating shaft 31. With this design, the rotating shaft 31 can be driven to rotate by the first motor 34, and the drum screen 2 can be driven to rotate by the second motor 9, so that differential rotation is formed between the rotating shaft 31 and the drum screen 2, which helps to evenly break up the material and avoid the phenomenon of material agglomeration in the drum screen 2, thereby preventing the screening holes 2121 of the drum screen 2 from being blocked.

[0031] Preferably, the central axis of the rotating shaft 31 coincides with the central axis of the drum screen 2. With this design, when the rotating shaft 31 and the drum screen 2 rotate at differential speeds, the stability of the drum screen 2 during rotation can be ensured, and the drum screen 2 is prevented from tilting or shaking, thereby preventing the material in the drum screen 2 from piling up due to tilting or shaking, thereby improving the screening efficiency.

[0032] See also Figure 4 As shown, the inner wall of the first screen 21 is provided with a spiral annular protrusion 211 and an annular screen 212. A plurality of screening holes 2121 are provided in the annular screen 212. The annular protrusion 211 and the dispersion blade head 32 cooperate to disperse the material in the screening chamber 11. Specifically, the annular protrusion 211 located in the first screen 21 and the dispersion blade head 32 located on the rotating shaft 31 are tangent. When the rotating shaft 31 and the drum-type screen 2 rotate at a differential speed, the annular protrusion 211 and the dispersion blade head 32 can cooperate with each other, so that the material in the screening chamber 11 is subjected to a continuous shear force, which greatly accelerates the speed at which the material passes through the first screen 21. At the same time, it can also avoid the phenomenon of material agglomeration in the drum-type screen 2, thereby preventing the screening holes 2121 of the drum-type screen 2 from being blocked.

[0033] It is worth noting that the annular protrusion 211 located in the first screen 21 has a spiral structure. When the first screen 21 rotates, the annular protrusion 211 can also push the material forward, so that the large particle material can move along the axial direction of the drum screen 2 to the waste chamber 12, and then the large particle material can be discharged from the shell 1 through the waste chamber 12.

[0034] In this embodiment, the dispersing cutter head 32 and the rotating shaft 31 are key-connected. Compared with the integrated structure design, this design allows for the replacement of only the dispersing cutter head 32 when one of the dispersing cutter heads 32 is damaged, without replacing the entire dispersing device 3, thereby reducing maintenance costs.

[0035] See also Figures 1 and 2 As shown, the drum-type polyurethane powder screening device provided in this embodiment further includes a feeding device 5, a discharging device 6 and a frame 7. The feeding device 5 and the frame 7 are arranged at one end of the shell 1, and the discharging device 6 is arranged below the shell 1.

[0036] Specifically, the feeding device 5 includes a feeding hopper 51, a driving motor 52, and a conveying device 53. The conveying device 53 is connected to the driving motor 52. The inner cavity of the feeding hopper 51 and the inner cavity of the conveying device 53 are connected. The material is collected from the feeding hopper 51 into the inner cavity of the conveying device 53. The conveying device 53 pushes the material into the drum screen 2 under the driving action of the driving motor 52. In this embodiment, the inner diameter of the feeding hopper 51 gradually decreases from top to bottom along the vertical direction, so that the feeding hopper 51 has a trumpet-shaped structure. This design helps the material to flow smoothly into the inner cavity of the conveying device 53 under the action of gravity. As the diameter of the feeding hopper 51 gradually decreases, the material is gradually compressed during the flow process and guided to the conveying device 53, reducing the accumulation and blockage of the material in the feeding hopper 51 and improving the continuity and stability of the material flow.

[0037] See also Figure 5 As shown, the conveying device 53 includes a housing 531 and a feed shaft 532 disposed within the housing 531. One end of the feed shaft 532 is connected to the drive motor 52. The feed shaft 532 is provided with spirally distributed feed pieces 533. When the drive motor 52 drives the feed shaft 532 to rotate, the feed pieces 533 rotate accordingly to push the material into the feed chamber 41. With this design, the conveying device 53 can effectively push the material from one end to the other, ensuring the continuity of the material during the conveying process. Under the drive action of the drive motor 52, the feed shaft 532 drives the spirally connected feed pieces 533 to rotate, so that the material is subjected to uniform and continuous thrust during the conveying process, avoiding accumulation and blockage of the material during the conveying process, thereby improving the material conveying efficiency.

[0038] See also Figure 3 As shown, the discharging device 6 is connected to the shell 1, and the discharging device 6 includes a first discharge port 61 and a second discharge port 62 isolated from each other. The first discharge port 61 is located below the screening chamber 11, and the second discharge port 62 is located below the waste chamber 12.

[0039] See also Figure 5 As shown, the bearing connecting seat 4 is sleeved on the conveying device 53, and a feed cavity 41 is provided in the bearing connecting seat 4. The feed cavity 41 is connected to the inner cavity of the conveying device 53, and the feed cavity 41 is connected to the screening cavity 11.

[0040] In this embodiment, the materials include but are not limited to powdery materials such as polyurethane soft foam powder and polyurethane rigid foam powder.

[0041] In another embodiment, in order to prevent the material in the drum screen 2 from softening, agglomerating or burning due to heat accumulation during the screening process and failure to dissipate heat in time, the following structure is also provided:

[0042] A hollow cavity is provided in the shell 1 and is arranged around the outer periphery of the drum-type screen 2, thereby constituting a circulation channel for the circulation of cooling liquid in the shell 1. The cooling liquid is introduced through the circulation channel. When the cooling liquid flows through the circulation channel, the wall surface of the circulation channel (metal material) absorbs the heat in the screening cavity 11 and transfers the heat to the flowing cooling liquid through heat conduction, thereby effectively absorbing and taking away the heat generated during the screening process, so as to control the temperature of the material to be maintained at a low level, thereby effectively controlling the material temperature of the material powder obtained by screening.

[0043] Preferably, the dispersing blade head 32 is a flat disc serrated dispersing disc, a three-paddle dispersing disc, a dish dispersing disc, a multi-tooth dispersing disc or a three-tooth dispersing disc.

[0044] Preferably, the conveying device 53 can be a screw conveying system, a pneumatic conveying system, or other powder material conveying systems. These conveying systems will not compact and agglomerate the polyurethane foam during the material conveying process, thereby reducing the difficulty of dispersing the polyurethane foam powder, reducing the output of screening residues, and improving the screening rate of the polyurethane foam powder.

[0045] Preferably, the distribution of the sieve holes 2121 can be array-type, random-type or combined-type.

[0046] It should be noted that the indicated orientation or position relationship is based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the application product is usually placed when in use, or the orientation or position relationship commonly understood by those skilled in the art, or the orientation or position relationship in which the application product is usually placed when in use. It is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0047] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all such improvements and changes should fall within the scope of protection of the claims attached to this utility model.

[0048] The above is an exemplary description of the present utility model patent in conjunction with the accompanying drawings. It is obvious that the implementation of the present utility model patent is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the present utility model patent, or the concept and technical solution of the present utility model patent are directly applied to other occasions without improvement, they are all within the scope of protection of the present utility model.

Claims

1. A drum-type polyurethane powder screening device with a dispersing cutter head, characterized in that: include: A housing (1), wherein a drum-type screen (2) is installed in the housing (1); A dispersion device (3) is provided in the drum-type screen (2), and comprises a rotating shaft (31) and a plurality of dispersion blades (32) arranged in sequence along the axis of the rotating shaft (31). When the rotating shaft (31) rotates, the plurality of dispersion blades (32) rotate to disperse the material in the drum-type screen (2).

2. The drum-type polyurethane powder screening device with a dispersing blade according to claim 1, characterized in that: The drum-type screen (2) comprises a first screen (21) and a leakage net (22), wherein the first screen (21) and the leakage net (22) are arranged in sequence along the forward direction of the material, a screening chamber (11) is formed between the first screen (21) and the dispersing blade head (32), a waste chamber (12) is formed between the leakage net (22) and the dispersing blade head (32), and the screening chamber (11) and the waste chamber (12) are connected to each other so that large particles of material are transported from the screening chamber (11) to the waste chamber (12).

3. The drum-type polyurethane powder screening device with a dispersing blade according to claim 2, characterized in that: One end of the rotating shaft (31) is connected to a first motor (34) via a coupling (33), and the other end of the rotating shaft (31) is connected to a bearing connection seat (4). The first motor (34) is used to drive the rotating shaft (31) to rotate.

4. The drum-type polyurethane powder screening device with a dispersing blade according to claim 2, characterized in that: The inner wall of the first screen (21) is provided with a spiral annular protrusion (211) and an annular screen (212), and a plurality of screening holes (2121) are provided in the annular screen (212). The annular protrusion (211) cooperates with the dispersing blade head (32) to disperse the material in the screening chamber (11).

5. The drum-type polyurethane powder screening device with a dispersing blade according to claim 3, characterized in that: It also includes a feeding device (5), a discharging device (6) and a frame (7), wherein the feeding device (5) and the frame (7) are arranged at one end of the shell (1), and the discharging device (6) is arranged below the shell (1).

6. The drum-type polyurethane powder screening device with a dispersing blade according to claim 5, characterized in that: The feeding device (5) comprises a feeding hopper (51), a driving motor (52) and a conveying device (53); the conveying device (53) is connected to the driving motor (52); the inner cavity of the feeding hopper (51) and the inner cavity of the conveying device (53) are connected; the material flows from the feeding hopper (51) into the inner cavity of the conveying device (53); and the conveying device (53) pushes the material into the drum-type screen (2) under the driving action of the driving motor (52).

7. The drum-type polyurethane powder screening device with a dispersing blade according to claim 5, characterized in that: The discharge device (6) is connected to the shell (1), and comprises a first discharge port (61) and a second discharge port (62) that are isolated from each other, wherein the first discharge port (61) is located below the screening chamber (11), and the second discharge port (62) is located below the waste chamber (12).

8. The drum-type polyurethane powder screening device with a dispersing blade according to claim 6, characterized in that: The bearing connection seat (4) is sleeved on the conveying device (53), and a feed cavity (41) is provided in the bearing connection seat (4), the feed cavity (41) is communicated with the inner cavity of the conveying device (53), and the feed cavity (41) is communicated with the screening cavity (11).

9. The drum-type polyurethane powder screening device with a dispersing blade head according to claim 1, characterized in that: A gear set (8) and a second motor (9) are provided at one end of the drum-type screen (2); the second motor (9) is connected to the drum-type screen (2) via the gear set (8); and the second motor (9) is used to drive the drum-type screen (2) to rotate around the rotating shaft (31).

10. The drum-type polyurethane powder screening device with a dispersing blade according to claim 8, characterized in that: The conveying device (53) includes a housing (531) and a feeding shaft (532) arranged in the housing (531). One end of the feeding shaft (532) is connected to the driving motor (52). The feeding shaft (532) is provided with a feeding piece (533) distributed in a spiral shape. When the driving motor (52) drives the feeding shaft (532) to rotate, the feeding piece (533) rotates accordingly to push the material into the feeding chamber (41).

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