Sealing structure of filter screen assembly of light object separator and light object separator

Abstract

The light object separator is provided with a machine shell with a feeding cavity and an air outlet cavity, the machine shell is provided with the filter screen assembly and an air sealing assembly, the filter screen assembly is arranged on an air flow path formed by the feeding cavity and the air outlet cavity, the filter screen assembly is rotationally connected into the machine shell, and the air sealing assembly is arranged in the machine shell. An airflow sealing cavity is formed between the outer side of the filter screen assembly and the machine shell, a through hole for communicating the airflow sealing cavity with the atmosphere is formed in the machine shell, one side of the airflow sealing cavity is separated from the air outlet cavity, the other side of the airflow sealing cavity is communicated with the feeding cavity, the air pressure of the airflow sealing cavity is larger than that of the feeding cavity, and therefore sealing airflow flowing to the feeding cavity from the airflow sealing cavity is formed. According to the sealing structure of the filter screen assembly of the light object separator and the light object separator, an airflow sealing mode replaces an existing mechanical sealing mode, the sealing effect is good, the problem that the sealing structure is damaged cannot occur, and the using effect of the light object separator is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of air separation equipment, and in particular to a sealing structure of a filter assembly of a light matter separator and the light matter separator. Background Art

[0002] In construction solid waste treatment equipment, negative pressure air separation devices are commonly used. Air separation equipment can separate light waste from heavy waste in construction solid waste.

[0003] CN202211191590.1 discloses a light material air separator for construction waste or demolition waste, and the shell of the light material separator has three channels, namely, a feed chamber, an air outlet chamber and a bottom outlet. A filtering mechanism is installed on the shell and located at the air outlet, and a wind mechanism is provided at the outlet, and the filtering mechanism includes a reduction motor and a filter screen driven by the reduction motor. Since the filter screen needs to isolate the feed chamber and the air outlet chamber, a mechanical contact seal must be used between the filter screen and the shell. However, since the airflow will flow from the feed chamber to the outlet chamber, and the fine impurities such as dust in the light garbage will also flow with the airflow, resulting in the accumulation of impurities such as dust at the mechanical seal. Long-term use will cause the mechanical seal to be worn, and the filter screen will be stuck or even the seal will fail. Summary of the invention

[0004] The technical problem to be solved by the present invention is: the present invention provides a sealing structure of a filter assembly of a light object separator and a light object separator, which replaces the existing mechanical seal with an airflow seal, has a good sealing effect, does not cause the problem of sealing structure damage, and ensures the use effect of the light object separator.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a sealing structure of a filter assembly of a light material separator, comprising a casing having a feed chamber and an air outlet chamber, a filter assembly is provided on the airflow path formed by the feed chamber and the air outlet chamber, the filter assembly is rotatably connected in the casing, an airflow sealing chamber is formed between the outer side of the filter assembly and the casing, a through hole is provided on the casing to connect the airflow sealing chamber with the atmosphere, one side of the airflow sealing chamber is separated from the air outlet chamber, and the other side is connected to the feed chamber, the air pressure of the airflow sealing chamber is greater than the air pressure of the feed chamber, thereby forming a sealed airflow flowing from the airflow sealing chamber to the feed chamber.

[0006] Furthermore, in order to prevent the gas in the airflow sealing chamber from flowing to the air outlet chamber, the filter assembly has a blocking member, and the blocking member is dynamically sealed to the casing to block the airflow from the airflow sealing chamber to the air outlet chamber.

[0007] Furthermore, in order to stably form a sealed airflow flowing toward the feed chamber, an airflow opening is formed between the filter assembly and the casing to connect the airflow sealing chamber and the feed chamber, and the width of the airflow opening is smaller than the width of the airflow sealing chamber.

[0008] Furthermore, in order to form an air flow port and an air flow sealing cavity, the filter assembly includes a connecting plate, the connecting plate includes a left side edge, a right side edge and a middle ring, an air flow port is formed between the outer edge of the left side edge and the inner wall of the casing, and an air flow sealing cavity is formed in the area between the casing, the left side edge, the right side edge and the middle ring.

[0009] Furthermore, in order to block light garbage, the filter of the filter assembly is installed on the left side, and the blocking member of the filter assembly is installed on the right side.

[0010] Furthermore, in order to form a relatively sealed state between the blocking member and the casing, the outer ring of the blocking member fits against the inner wall of the casing, and the inner ring of the blocking member fits against the outer wall of the connecting flange of the casing, thereby blocking the airflow from the airflow sealing cavity to the air outlet cavity.

[0011] Furthermore, in order to prevent dust impurities in the airflow from entering the airflow sealing chamber, a baffle is further provided in the feed chamber. The baffle is arranged at intervals on the side of the airflow opening and blocks the airflow opening in the axial direction.

[0012] Furthermore, in order to enable the annular baffle to block dust from entering the airflow sealing cavity and not interfere with the filtering of the filter screen, the baffle is an annular baffle arranged along the outer circle of the filter screen.

[0013] Furthermore, in order to make the airflow inside the airflow sealing cavity uniform, the through holes are evenly spaced and arranged in the circumferential direction of the housing.

[0014] The technical solution adopted by the present invention to solve its technical problem is: a light matter separator, including a casing, on which a filter assembly and an air shut-off assembly are arranged, and a sealing structure of the filter assembly is arranged inside the casing.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The sealing structure of the filter assembly of the light object separator and the light object separator of the present invention realizes the sealing of the filter assembly through airflow sealing, thereby preventing dust and impurities in solid waste from damaging the sealing structure, achieving good sealing effect and ensuring the service life of the light object separator.

[0016] 2. The sealing structure of the filter assembly of the light object separator of the present invention and the light object separator prevent the gas in the airflow sealing chamber from entering the air outlet chamber through the blocking member, ensure that the airflow sealing chamber and the feed chamber have a stable air pressure difference, realize constant airflow to the feed chamber, and ensure the airflow sealing effect.

[0017] 3. The sealing structure of the filter assembly of the light matter separator and the light matter separator of the present invention prevent dust and impurities in the solid waste from entering the airflow sealing cavity through the baffle, thereby further ensuring the effectiveness of the airflow sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0019] Figure 1 It is a structural schematic diagram of the sealing structure of the filter assembly of the light matter separator of the present invention; Figure 2 for Figure 1 A magnified schematic diagram of the local structure; Figure 3 A three-dimensional schematic diagram of the sealing structure of the filter assembly of the light matter separator; In the figure: 1. casing, 11. feed chamber, 12. air outlet chamber, 13. through hole, 14. baffle, 2. filter assembly, 21. air flow sealing chamber, 22. connecting plate, 23. filter, 24. blocking member, 25. air flow port, 3. air shut-off assembly. DETAILED DESCRIPTION

[0020] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] like Figure 1 As shown, a light material separator includes a housing 1, which has a feed chamber 11 and an air outlet chamber 12, and a filter assembly 2 and an air shutoff assembly 3. The air outlet chamber 12 is connected to an external exhaust device. The external exhaust device makes the feed chamber 11 and the air outlet chamber 12 negative pressure, and the construction solid waste thrown from the feed chamber 11 is collected from the air shutoff assembly 3 below. The air flow carries light materials in the construction solid waste, including plastic belts, leaves, PVC pipes, etc., which are blocked by the filter 23 and discharged from the lower air shutoff assembly 3. The filter assembly 2 is connected and rotated through an external power component, and the mesh on the filter 23 ensures that the feed chamber 11 and the air outlet chamber 12 are connected, and at the same time, the construction waste is blocked from entering the air outlet chamber 12. The air shutoff assembly 3 and other structures of the light material separator can select the structure in the patent (CN202211191590.1) previously applied by the applicant or the conventional structure in the field.

[0024] The filter assembly 2 rotates in the housing 1 , and the airflow accompanied by impurities will also pass through the filter 23 , so a corresponding sealing structure must be provided between the filter assembly 2 and the housing 1 .

[0025] Therefore, the present application adopts the airflow sealing principle to replace the conventional mechanical sealing structure. The airflow sealing principle will be described in detail below.

[0026] like Figures 2 to 3 As shown, an airflow sealing chamber 21 is formed between the outer side of the filter assembly and the housing 1. The housing 1 is provided with a through hole 13 that connects the airflow sealing chamber 21 with the atmosphere. One side of the airflow sealing chamber 21 is separated from the air outlet chamber 12, and the other side is connected to the feed chamber 11. The air pressure of the airflow sealing chamber 21 is greater than the air pressure of the feed chamber 11, thereby forming a sealed airflow flowing from the airflow sealing chamber 21 to the feed chamber 11. The filter assembly 2 has a blocking member 24, and the blocking member 24 is dynamically sealed to the housing 1 to block the airflow from the airflow sealing chamber 21 to the air outlet chamber 12. An airflow port 25 that connects the airflow sealing chamber 21 and the feed chamber 11 is formed between the filter assembly and the housing 1.

[0027] The basic principle of airflow sealing is as follows: when the light material separator is working, the external exhaust device is started, the feed chamber 11 and the outlet chamber 12 are both in a negative pressure state, and the airflow flows along the feed chamber 11, the filter assembly and the outlet chamber. Since the airflow sealing chamber 21 is connected to the external atmosphere, the external airflow will enter the airflow sealing chamber 21, so the pressure of the airflow sealing chamber 21 is greater than that of the feed chamber 11 and the outlet chamber, so the airflow in the airflow sealing chamber 21 will flow to the feed chamber 11 and the outlet chamber 12. At this time, since the airflow sealing chamber 21 and the air outlet chamber 12 are separated by the blocking member 24, the airflow in the airflow sealing chamber 21 cannot enter the air outlet chamber 12, so the airflow in the airflow sealing chamber 21 can only enter the feed chamber 11. Therefore, a stable airflow will be formed on the path from the airflow sealing chamber 21 to the airflow port 25. The pressure of the airflow here is greater than the airflow pressure from the feed chamber 11 to the air outlet chamber 12, so that the airflow between the feed chamber 11 and the air outlet chamber 12 will not enter the airflow sealing chamber 21, thereby forming an effective seal between the filter assembly 2 and the housing 1, and the sealed airflow direction is as follows: Figure 2 As shown by the arrow a, the airflow direction of the feed chamber 11 and the air outlet chamber 12 is as follows: Figure 2 As shown by arrow b.

[0028] The filter assembly 2 includes a connecting plate 22, and the connecting plate 22 includes a left side, a right side and an intermediate ring. The filter 23 is installed on the left side, and the blocking member 24 is installed on the right side. An airflow port 25 is formed between the outer edge of the left side and the inner wall of the casing 1, and the area between the casing 1, the left side, the right side and the intermediate ring forms an airflow sealing chamber 21. The airflow sealing chamber 21 is an annular cavity formed between the connecting plate 22 and the shell, and the through holes 13 are evenly arranged at intervals in the circumferential direction of the casing 1, so that the external air can evenly enter the airflow seal. The width of the airflow port 25 is smaller than the width of the airflow sealing chamber 21. Since the airflow port 25 is narrower than the airflow sealing chamber 21, the flow rate of the gas flowing out of the airflow port 25 becomes smaller than the atmospheric pressure. There will be a pressure difference in the airflow on the path from the airflow sealing chamber 21 to the airflow port 25 and then to the feed chamber 11, making it easier for the external air to enter the airflow sealing chamber 21, thereby ensuring the effect of the airflow sealing.

[0029] The outer ring of the blocking member 24 fits with the inner wall of the housing 1, and the inner ring of the blocking member 24 fits with the outer wall of the connecting flange of the housing 1, thereby blocking the airflow from the airflow sealing chamber 21 to the air outlet chamber 12. In this embodiment, the blocking member 24 can be a flexible sealing baffle 14. Under the blocking effect of the sealing baffle 14, the resistance of the airflow entering the air outlet chamber 12 is relatively large, so the airflow in the airflow sealing chamber 21 will automatically flow to the feed chamber 11 with low air pressure. At the same time, the sealing baffle 14 also plays a role in sealing between the filter assembly 2 and the housing 1. Under the blocking of the airflow sealing chamber 21, external dust and impurities will not enter the blocking member 24, avoiding dust and impurities from wearing the blocking member 24.

[0030] A baffle 14 is also provided in the feed chamber 11, and the baffle 14 is arranged at intervals on the side of the air flow opening 25, and blocks the air flow opening 25 in the axial direction. The baffle 14 is an annular baffle arranged along the outer circle of the filter screen 23. The annular baffle plays a certain shielding role on the air flow opening 25, blocks the inflow of the feed chamber 11 in the circumferential direction, prevents the air flow of the feed chamber 11 from flowing directly toward the air flow opening 25, and prevents very small dust and impurities from mistakenly entering the air flow sealing chamber 21, further ensuring the sealing effect.

[0031] When the light object separator of the present invention is working normally, the air outlet chamber 12 is connected to an external air suction device. At this time, the interior of the light object separator is under negative pressure. When solid waste is put into the feed chamber 11 from the feed port of the light object separator, the solid waste enters the air shut-off component 3 below under the action of gravity and airflow. At the same time, due to the effect of airflow sealing, the light waste will not enter the gap between the filter 23 and the casing 1, thereby ensuring the sealing effect of the light object separator and extending the service life of the light object separator.

[0032] In summary, the sealing structure of the filter assembly of the light object separator and the light object separator of the present invention replace the existing mechanical seal with an airflow seal, have a good sealing effect, will not cause the problem of sealing structure damage, and ensure the use effect of the light object separator.

[0033] The above description is based on the ideal embodiment of the present invention. Through the above description, relevant personnel can make various changes and modifications without departing from the technical concept of the present invention. The technical scope of the present invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A sealing structure for a filter assembly of a light matter separator, comprising a housing (1) having a feed cavity (11) and an air outlet cavity, a filter assembly (2) being arranged on an air flow path formed by the feed cavity (11) and the air outlet cavity (12), the filter assembly (2) being rotatably connected in the housing (1), characterized in that: An airflow sealing chamber (21) is formed between the outer side of the filter assembly (2) and the housing (1); a through hole (13) is provided on the housing (1) for connecting the airflow sealing chamber (21) with the atmosphere; one side of the airflow sealing chamber (21) is separated from the air outlet chamber (12), and the other side is connected to the feed chamber (11); the air pressure of the airflow sealing chamber (21) is greater than the air pressure of the feed chamber (11), thereby forming a sealed airflow flowing from the airflow sealing chamber (21) to the feed chamber (11).

2. The sealing structure of the filter assembly of the light matter separator according to claim 1 is characterized in that: The filter assembly (2) has a blocking member (24), and the blocking member (24) is dynamically sealed to the housing (1) to block the airflow from the airflow sealing chamber (21) to the air outlet chamber (12).

3. The sealing structure of the filter assembly of the light matter separator according to claim 1 is characterized in that: An air flow opening (25) is formed between the filter assembly (2) and the housing (1) to connect the air flow sealing chamber (21) and the feed chamber (11), and the width of the air flow opening (25) is smaller than the width of the air flow sealing chamber (21).

4. The sealing structure of the filter assembly of the light matter separator according to any one of claims 1 to 3, characterized in that: The filter assembly (2) comprises a connection plate (22), the connection plate (22) comprising a left side edge, a right side edge and a middle ring, an air flow opening (25) is formed between the outer edge of the left side edge and the inner wall of the housing (1), and an air flow sealing cavity (21) is formed in the area between the housing (1), the left side edge, the right side edge and the middle ring.

5. The sealing structure of the filter assembly of the light matter separator according to claim 4, characterized in that: The filter (23) of the filter assembly (2) is installed on the left side, and the blocking member (24) of the filter assembly (2) is installed on the right side.

6. The sealing structure of the filter assembly of the light matter separator according to claim 5, characterized in that: The outer ring of the blocking member (24) fits against the inner wall of the casing (1), and the inner ring of the blocking member (24) fits against the outer wall of the connecting flange of the casing (1), thereby blocking the airflow from the airflow sealing chamber (21) to the air outlet chamber (12).

7. The sealing structure of the filter assembly of the light matter separator according to claim 4, characterized in that: A baffle (14) is also provided in the feed cavity (11), and the baffle (14) is arranged at intervals on the side of the air flow opening (25) and blocks the air flow opening (25) in the axial direction.

8. The sealing structure of the filter assembly of the light matter separator according to claim 7, characterized in that: The baffle (14) is an annular baffle arranged along the outer circle of the filter screen (23).

9. The sealing structure of the filter assembly of the light matter separator according to claim 1, characterized in that: The through holes (13) are evenly spaced in the circumferential direction of the housing (1).

10. A light matter separator, characterized in that: It comprises a casing (1), on which a filter assembly and an air shut-off assembly (3) are provided, and inside of the casing (1) there is a sealing structure of the filter assembly according to any one of claims 1 to 9.

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