Lightweight Cyclone Filter

Abstract

This utility model discloses a lightweight cyclone filter, including a housing. The housing forms an upper chamber and a lower chamber in a vertical direction. The side of the housing has a positive pressure inlet communicating with the upper chamber, and the top of the housing has a negative pressure outlet communicating with the upper chamber. A filter assembly is rotatably connected to the upper chamber and located below the negative pressure outlet. Airflow carrying lightweight materials and dust enters the upper chamber. The airflow passes through the filter assembly, causing the dust and lightweight materials to separate at the filter assembly. The lightweight materials fall from the outside of the filter assembly into the lower chamber, while the dust is discharged from the inside of the filter assembly through the negative pressure outlet. The lower chamber is equipped with a filter element for collecting lightweight materials. Dust that falls into the lower chamber with the lightweight materials is separated from the lightweight materials at the filter element. This utility model of a lightweight cyclone filter separates and collects lightweight materials and dust, preventing the lightweight materials from clogging the filter and causing filter failure.

Description

Technical Field

[0001] This utility model relates to the field of construction solid waste treatment technology, specifically to dust filtration in construction solid waste, and particularly to a lightweight cyclone filter. Background Technology

[0002] The construction solid waste raw material processing production line will generate a lot of fugitive dust emissions, so a dust collection system is needed for fixed-point collection.

[0003] However, due to the large amount of lightweight materials contained in the raw materials, especially lightweight plastic sheets, these lightweight materials are captured by the dust collection system along with the dust during the dust collection process. These lightweight materials enter the dust collector and adhere to the filter components, causing clogging and adversely affecting the operation of the dust collection system. In the later dust collection stage, the collected dust and lightweight materials are discharged as a mixture, making sorting impossible and increasing the difficulty of solid waste treatment. Utility Model Content

[0004] The technical problem to be solved by this utility model is: in order to solve the technical problem that lightweight materials and dust cannot be separated after mixing in the prior art, this utility model provides a lightweight material cyclone filter that separates and collects lightweight materials and dust, thereby avoiding the clogging of the filter by lightweight materials and causing the filter to fail.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a lightweight cyclone filter, including a housing, wherein the housing forms an upper cavity and a lower cavity in the vertical direction, the side of the housing has a positive pressure inlet communicating with the upper cavity, and the top of the housing has a negative pressure outlet communicating with the upper cavity;

[0006] The upper cavity is rotatably connected to a filter assembly located at the lower end of the negative pressure outlet. An airflow carrying light materials and dust enters the upper cavity. The airflow passes through the filter assembly, causing the dust and light materials to separate at the filter assembly. The light materials fall from the outside of the filter assembly into the lower cavity, while the dust follows the airflow from the inside of the filter assembly and is discharged from the negative pressure outlet.

[0007] The lower cavity is equipped with a filter for collecting lightweight materials. Dust that falls into the lower cavity along with the lightweight materials is separated from the lightweight materials at the filter.

[0008] This utility model of a lightweight cyclone filter utilizes cyclone centrifugal force and negative pressure to separate lightweight materials and dust, enabling lightweight material recovery and dust filtration, thus solving the problem of filter failure caused by lightweight materials clogging the filter.

[0009] Furthermore, in order to collect the dust after secondary separation, the bottom of the lower chamber has a dust discharge port, which is connected to the negative pressure outlet through a dust discharge pipe. The dust after secondary separation flows back to the negative pressure outlet along the dust discharge pipe and is then discharged.

[0010] Furthermore, in order to ensure that the dust moves smoothly in the dust discharge pipe, a notch is provided at the bottom of the dust discharge pipe, and external air enters the dust discharge pipe through the notch, forming an airflow that flows to the negative pressure outlet.

[0011] Furthermore, in order to ensure that the dust in the lower cavity can enter the negative pressure outlet, the air pressure at the bottom of the lower cavity is slightly greater than the air pressure in the area of ​​the upper cavity near the negative pressure outlet.

[0012] Furthermore, in order to reduce the airflow between the upper and lower cavities, the upper and lower cavities are connected by a connecting cavity, which is a conical cavity that is wider at the top and narrower at the bottom.

[0013] Furthermore, in order to achieve the separation of lightweight materials and dust, the filter assembly includes a filter cylinder spaced apart from the inner wall of the housing. The inner cavity of the filter cylinder faces the negative pressure outlet. The filter cylinder is provided with filter holes in its circumferential direction. The dust follows the airflow through the filter holes and is discharged from the negative pressure outlet. The lightweight materials fall into the lower cavity along the area between the filter cylinder and the upper cavity.

[0014] Furthermore, in order to form an airflow sealing structure, the upper end of the filter cartridge has a partition, which includes a vertical section and a radial section. Both the vertical section and the radial section are spaced apart from the housing and form an airflow cavity. The housing has an air inlet in the part corresponding to the airflow cavity. External air enters the air inlet, making the pressure in the airflow cavity greater than that in the upper cavity.

[0015] Furthermore, in order to prevent small, lightweight objects from entering the negative pressure outlet, a portion of the airflow in the airflow chamber flows through the radial section into the area between the filter cartridge and the upper chamber to block the lightweight objects, while another portion of the airflow flows through the vertical section into the negative pressure outlet.

[0016] Furthermore, in order to drive the filter cartridge to rotate by airflow, the filter cartridge is rotatably connected to the housing via a rotating shaft. Baffles are evenly distributed on the outer periphery of the filter cartridge in a vertical direction. The baffles are set at an angle to the radial direction of the filter cartridge. The airflow blows the baffles to make the filter screen rotate.

[0017] Furthermore, to prevent dust from entering the transmission components, a connecting frame is provided inside the housing, and both ends of the rotating shaft are connected to the connecting frame via bearings. A sealing ring is also provided between the rotating shaft and the connecting frame.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. This utility model of a lightweight cyclone filter separates dust and lightweight materials through a filter screen assembly by creating negative pressure in the upper chamber and using centrifugal force. In the lower chamber, the lightweight materials and dust are separated a second time by gravity and inertia, thus achieving the separation and collection of dust and lightweight materials.

[0020] 2. The lightweight cyclone filter of this utility model connects the dust discharge port of the lower chamber to the negative pressure outlet through the dust discharge pipe. Under the action of pressure difference, the dust separated in the second stage flows back to the negative pressure outlet through the dust discharge pipe and is discharged in a concentrated manner, so as to avoid dust remaining inside the filter.

[0021] 3. The lightweight cyclone filter of this utility model forms an airflow sealing structure between the shell and the filter screen assembly, which prevents small lightweight materials from entering the gap between the filter cartridge and the shell and being sucked out from the negative pressure outlet. At the same time, it does not require the addition of a sealing element between the filter cartridge and the shell, ensuring that the airflow entering from the positive pressure inlet can drive the filter cartridge to rotate. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Figure 1 This is a schematic diagram of the structure of the lightweight cyclone filter of this utility model;

[0024] Figure 2 for Figure 1 Internal structure diagram;

[0025] Figure 3 for Figure 1 A bottom view;

[0026] Figure 4 for Figure 1 A sectional view;

[0027] Figure 5 for Figure 4 A partial structural diagram.

[0028] In the picture:

[0029] 1. Shell; 11. Upper cavity; 12. Lower cavity; 121. Dust outlet; 13. Positive pressure inlet; 14. Negative pressure outlet; 15. Connecting cavity; 16. Connecting frame; 17. Bearing; 18. Sealing ring; 19. Air inlet.

[0030] 2. Filter assembly; 21. Filter cartridge; 22. Rotating shaft; 23. Baffle; 24. Separator; 241. Vertical section; 242. Radial section; 243. Airflow chamber;

[0031] 3. Filter components;

[0032] 4. Dust exhaust pipe; 41. Notch. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0034] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] Example 1, as Figures 1 to 5 As shown, a lightweight cyclone filter includes a housing 1, which forms an upper chamber 11 and a lower chamber 12 in a vertical direction. The side of the housing 1 has a positive pressure inlet 13 communicating with the upper chamber 11, and the inlet 13 is located tangentially to the housing 1. The top of the housing 1 has a negative pressure outlet 14 communicating with the upper chamber 11. The negative pressure outlet 14 is connected to an external exhaust fan, thereby creating negative pressure within the upper chamber 11. This structure is not related to the concept of this utility model and is therefore omitted in the figure.

[0037] like Figure 2 As shown, specifically, a filter assembly 2 is rotatably connected inside the upper cavity 11 and located at the lower end of the negative pressure outlet 14. Airflow carrying light materials and dust enters the upper cavity 11. The airflow passes through the filter assembly 2, causing the dust and light materials to separate at the filter assembly 2. The light materials fall from the outside of the filter assembly 2 into the lower cavity 12, while the dust follows the airflow from the inside of the filter assembly 2 and is discharged from the negative pressure outlet 14. Figure 2The middle arrow 'a' indicates the direction of movement of lightweight materials, and the arrow 'b' indicates the direction of movement of dust.

[0038] Under negative pressure, lightweight materials and dust enter the upper chamber 11 with the airflow. Since the outer side of the filter assembly 2 is connected to the lower chamber 12, and the inner side of the filter assembly 2 is connected to the negative pressure outlet 14, lightweight materials will fall into the lower chamber 12 after colliding with the filter assembly 2. Since the filter assembly 2 has multiple through holes, dust will enter its interior through the filter assembly 2 and flow upward with the airflow to the negative pressure outlet 14, and then be discharged from the negative pressure outlet 14.

[0039] Specifically, the lower chamber 12 is equipped with a filter element 3 for collecting lightweight materials. Dust that falls into the lower chamber 12 along with the lightweight materials is separated from them a second time at the filter element 3. Since a small amount of dust will settle into the lower chamber 12 with the lightweight materials, when the lightweight materials collide with the filter element 3, the filter element 3 collects the lightweight materials, while the dust continues to settle downwards through the filter element 3, thus achieving a secondary separation of dust and lightweight materials. After these two separations, there is almost no dust on the lightweight materials, allowing them to be recycled.

[0040] It should be noted that the arrangement of the mesh openings of the filter element 3 in the attached diagram is for illustrative purposes only. To avoid ambiguity, only a portion of the mesh openings are shown in the diagram; the actual mesh openings are denser. In practical use, a filter element 3 similar to a metal woven mesh can be selected, allowing dust to pass through the filter element 3 more effectively and preventing it from accumulating on it. Preferably, the lower chamber 12 has an openable door, allowing the filter element 3 to be replaced after it has collected a certain amount of lightweight material.

[0041] Specifically, the bottom of the lower chamber 12 has a dust discharge port 121, which is connected to the negative pressure outlet 14 through the dust discharge pipe 4. The dust after secondary separation flows back to the negative pressure outlet 14 along the dust discharge pipe 4 and is then discharged. Since the lightweight cyclone filter is always in operation, if the dust in the lower chamber 12 is not discharged, dust will accumulate in the lower chamber 12 as the working time increases, causing dust to overflow when the filter element 3 is replaced.

[0042] Because the upper end of the filter assembly is closer to the negative pressure outlet 14, the air pressure in the upper part of the upper chamber 11 is lower, while the bottom of the lower chamber 12 is much farther from the upper part of the upper chamber 11. Therefore, the air pressure at the bottom of the lower chamber 12 is slightly greater than the air pressure at the upper part of the upper chamber 11. As a result, under the action of the pressure difference, the dust deposited at the bottom of the lower chamber 12 will enter the dust discharge pipe 4. Through the dust discharge pipe 4, the dust in the lower chamber 12 and the dust in the upper chamber 11 can be merged and discharged from the negative pressure outlet 14, thus preventing dust from remaining inside the filter.

[0043] Preferred, such as Figure 3As shown, a notch 41 is provided at the bottom of the dust exhaust pipe 4. External air enters the dust exhaust pipe 4 through the notch 41, forming an airflow that flows to the negative pressure outlet 14. In order to further ensure that an airflow for conveying dust is formed inside the dust exhaust pipe 4, a notch 41 is provided on the dust exhaust pipe 4. Since the upper end of the dust exhaust pipe 4 is close to the negative pressure outlet 14, and the bottom of the dust exhaust pipe 4 is connected to the external air due to the notch 41, the pressure difference between the bottom and the upper end of the dust exhaust pipe 4 is further increased. Under the action of the external airflow, the dust flows upward along the dust exhaust pipe 4 to the negative pressure outlet 14, and is then discharged from the negative pressure outlet 14.

[0044] Preferably, the notch 41 is close to the dust discharge port 121 of the lower cavity 12, and the notch 41 is small in size, only opened on the bottom end face of the dust discharge pipe 4, forming a small-sized notch 41, so the airflow entering the dust discharge pipe 4 is not very large. At the same time, since the external air pressure is greater than the air pressure at the bottom of the lower cavity 12 (the air pressure inside the dust discharge pipe 4), and the air pressure at the bottom of the lower cavity 12 is slightly greater than the air pressure in the negative pressure outlet 14 area, the airflow will flow upward along the dust discharge pipe 4 instead of entering the lower cavity 12.

[0045] In Example 2, based on Example 1, the upper cavity 11 and the lower cavity 12 are connected by a connecting cavity 15, which is a conical cavity that is wider at the top and narrower at the bottom. Under the action of the conical cavity, lightweight materials can be collected and enter the lower cavity 12 below along the connecting cavity 15. Simultaneously, due to the conical cavity's narrowing structure, airflow between the upper cavity 11 and the lower cavity 12 is minimal, preventing convection and dust disturbance, while ensuring that the air pressure at the bottom of the lower cavity 12 is slightly higher than that at the negative pressure outlet 14.

[0046] In Example 3, based on Example 2, the filter assembly 2 includes a filter cylinder 21 spaced apart from the inner wall of the housing 1. The filter cylinder 21 has filter holes on its circumference. Dust follows the airflow through the filter holes and is discharged from the negative pressure outlet 14. Lighter materials fall into the lower cavity 12 along the area between the filter cylinder 21 and the upper cavity 11. In this example, a cylindrical filter is used to separate lighter materials and dust; other shapes can also be selected. The arrangement of the filter holes in the figure is only for illustrative purposes.

[0047] Preferably, the filter cartridge 21 is rotatably connected to the housing 1 via a rotating shaft 22. Baffles 23 are evenly distributed along the vertical direction on the outer periphery of the filter cartridge 21, with the baffles 23 set at an angle to the radial direction of the filter cartridge 21. Airflow enters the housing 1 through the tangential inlet 13, blowing the baffles 23 and causing the filter cartridge 21 to rotate rapidly. The airflow entering from the positive pressure inlet 13 pushes the baffles 23, and the force on the baffles 23 drives the rotating shaft 22 of the filter cartridge 21. At this time, the filter cartridge 21 can achieve automatic rotation without external power. During normal operation, due to the high rotation speed of the filter cartridge, light materials will not adhere to the filter cartridge. Instead, under the combined action of wind force and the centrifugal force of the rotating filter cartridge 21, the light materials are thrown outwards and fall into the lower chamber 12, while dust passes through the filter holes and is discharged with the airflow.

[0048] Specifically, the housing 1 contains a connecting frame 16, and both ends of the rotating shaft 22 are connected to the connecting frame 16 via bearings 17. A sealing ring 18 is also provided between the rotating shaft 22 and the connecting frame 16. This prevents dust from entering between the rotating shaft 22 and the bearings 17, thus avoiding wear on the transmission mechanism. The bearings can be designed with commonly used lubrication devices, which will not be shown or described in detail in this example.

[0049] In Example 4, based on Example 3, since the filter cartridge 21 and the housing 1 need to rotate relative to each other and have a gap, under the action of airflow, some small and lightweight materials may rise with the airflow and enter the negative pressure outlet 14 through the gap between the filter cartridge 21 and the housing 1. Therefore, a sealing structure needs to be designed to block these lightweight materials. However, setting conventional mechanical seals (such as sealing rings) on the filter cartridge 21 or the housing 1 will increase the resistance to the rotation of the filter cartridge 21. Since the filter cartridge 21 rotates by airflow, the resistance of the seal will prevent the filter cartridge 21 from rotating normally.

[0050] Preferably, the upper end of the filter cartridge 21 has a baffle 24, which includes a vertical section 241 and a radial section 242. Both the vertical section 241 and the radial section 242 have a gap with the housing 1 and form an airflow cavity 243. The housing 1 has an air inlet 19 in the part corresponding to the airflow cavity 243. External air enters the air inlet 19, making the pressure in the airflow cavity 243 greater than that in the upper cavity 11. As shown in the figure, there is a gap between the radial section 242 and the side wall of the housing 1. There is a gap between the vertical section 241 and the upper end face of the housing 1, and there is also a gap between the right side of the vertical section 241 and the side plate at the air pressure outlet. The airflow through the vertical section 241 will form a reversible airflow path, increasing the flow time of the airflow from the airflow cavity 243 to the negative pressure outlet 14, prolonging the time of the airflow in the airflow cavity 243, and ensuring the pressure in the airflow cavity 243.

[0051] Part of the airflow within the airflow chamber 243 flows through the radial section 242 into the area between the filter cartridge 21 and the upper chamber 11 to block lightweight materials, while the other part of the airflow flows through the vertical section 241 into the negative pressure outlet 14. For example... Figure 5 As shown, under the action of the airflow chamber 243, external air enters the airflow chamber 243 through the air inlet 19. The airflow chamber 243 is under positive pressure, while the upper chamber 11 is under negative pressure. Therefore, the airflow will flow along the vertical section 241 and the radial section 242. The airflow through the radial section 242 will create resistance, thus preventing lightweight materials from entering the airflow chamber. The airflow through the vertical section 241 will enter the negative pressure outlet 14. Therefore, during rotation, an airflow seal is formed through the airflow chamber 243, which replaces the mechanical seal and avoids the resistance of the mechanical seal affecting the rotation of the filter cartridge 21. At the same time, the airflow chamber 243 can prevent lightweight materials from flowing upward, preventing small and light materials from entering the negative pressure outlet 14 through the filter cartridge 21.

[0052] In summary, this utility model of a lightweight cyclone filter separates and collects lightweight materials and dust, preventing lightweight materials from clogging the filter and causing it to fail.

[0053] The above description is based on the preferred embodiments of this utility model. Through the above description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined by the scope of the claims.

Claims

1. A cyclone filter for light objects, characterized in that Includes a housing (1), which forms an upper cavity (11) and a lower cavity (12) in the vertical direction. The side of the housing (1) has a positive pressure inlet (13) communicating with the upper cavity (11), and the top of the housing (1) has a negative pressure outlet (14) communicating with the upper cavity (11). The upper cavity (11) is rotatably connected to a filter assembly (2) located at the lower end of the negative pressure outlet (14). An airflow carrying light materials and dust enters the upper cavity (11). The airflow passes through the filter assembly (2), causing the dust and light materials to separate at the filter assembly (2). The light materials fall from the outside of the filter assembly (2) to the lower cavity (12), while the dust follows the airflow from the inside of the filter assembly (2) and is discharged from the negative pressure outlet (14). The lower cavity (12) is provided with a filter element (3) for collecting light materials. Dust that falls into the lower cavity (12) along with the light materials is separated from the light materials at the filter element (3).

2. The light object cyclone filter according to claim 1, wherein, The bottom of the lower cavity (12) has a dust discharge port (121), which is connected to the negative pressure outlet (14) through a dust discharge pipe (4). The dust after secondary separation flows back to the negative pressure outlet (14) along the dust discharge pipe (4) and is then discharged.

3. The light object cyclone filter according to claim 2, wherein, The bottom of the dust discharge pipe (4) has a notch (41) through which external air enters the dust discharge pipe (4) and forms an airflow that flows to the negative pressure outlet (14).

4. The light object cyclone filter according to claim 3, wherein, The air pressure at the bottom of the lower chamber (12) is slightly greater than the air pressure in the area of ​​the upper chamber (11) near the negative pressure outlet (14).

5. The light object cyclone filter according to claim 4, wherein, The upper cavity (11) and the lower cavity (12) are connected by a connecting cavity (15), which is a conical cavity that is wider at the top and narrower at the bottom.

6. The light object cyclone filter of claim 1, wherein, The filter assembly (2) includes a filter cylinder (21) spaced apart from the inner wall of the housing (1). The inner cavity of the filter cylinder (21) faces the negative pressure outlet (14). The filter cylinder (21) has filter holes in its circumferential direction. The dust follows the airflow through the filter holes and is discharged from the negative pressure outlet (14). The light material falls into the lower cavity (12) along the area between the filter cylinder (21) and the upper cavity (11).

7. The lightweight cyclone filter according to claim 6, characterized in that, The filter cartridge (21) has a partition (24) at its upper end. The partition (24) includes a vertical section (241) and a radial section (242). The vertical section (241) and the radial section (242) are spaced apart from the housing (1) and form an airflow cavity (243). The housing (1) has an air inlet (19) in the part corresponding to the airflow cavity (243). External air enters the air inlet (19), making the pressure in the airflow cavity (243) greater than that in the upper cavity (11).

8. The light object cyclone filter according to claim 7, wherein, A portion of the airflow in the airflow chamber (243) flows through the radial section (242) into the area between the filter cartridge (21) and the upper chamber (11) to block light materials, while another portion of the airflow flows through the vertical section (241) into the negative pressure outlet (14).

9. The lightweight cyclone filter according to claim 6, characterized in that, The filter cartridge (21) is rotatably connected to the housing (1) via a rotating shaft (22). Baffles (23) are evenly distributed on the outer periphery of the filter cartridge (21) in a vertical direction. The baffles (23) are set at an angle to the radial direction of the filter cartridge (21). The airflow blows the baffles (23) to make the filter screen rotate.

10. The lightweight cyclone filter according to claim 9, characterized in that, The housing (1) is provided with a connecting frame (16), and the two ends of the rotating shaft (22) are connected to the connecting frame (16) through bearings (17). A sealing ring (18) is also provided between the rotating shaft (22) and the connecting frame (16).

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