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

Abstract

The present invention discloses a sealing structure of a filter screen assembly of a light material separator and a light material separator. The housing has a feed chamber and an air outlet chamber. A filter screen assembly and an air shut-off assembly are provided on the housing. The filter screen assembly is provided on the air flow path formed by the feed chamber and the air outlet chamber. The filter screen assembly is rotatably connected in the housing. An air flow sealing chamber is formed between the outer side of the filter screen assembly and the housing. The housing is provided with a through hole communicating the air flow sealing chamber with the atmosphere. One side of the air flow sealing chamber is separated from the air outlet chamber, and the other side is communicated with the feed chamber. The air pressure in the air flow sealing chamber is greater than the air pressure in the feed chamber, so as to form a sealed air flow flowing from the air flow sealing chamber to the feed chamber. The sealing structure of the filter screen assembly of the light material separator and the light material separator of the present invention replace the existing mechanical seal with an air flow seal form, have a good sealing effect, will not have problems with damage to the sealing structure, and ensure the use effect of the light material separator.

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 screen assembly of a light material separator and a light material separator. Background Art

[0002] In construction waste treatment equipment, a negative pressure air separation device is generally commonly used. The air separation equipment can separate light waste and heavy waste in construction waste.

[0003] CN202211191590.1 discloses a light material air separator for construction waste or demolition waste. The housing of the light material separator has three channels: a feed chamber, an air outlet chamber, and a bottom discharge port. A filtering mechanism is installed on the housing at the air extraction port, and a wind closing mechanism is provided at the discharge port. The filtering mechanism includes a reduction motor and a filter screen driven by the reduction gear. Since the filter screen needs to isolate the feed chamber and the air outlet chamber, mechanical contact sealing must be adopted between the filter screen and the housing. However, since the air flow will flow from the feed chamber to the discharge chamber, and fine impurity wastes such as dust in the light waste will also flow along with the air flow, resulting in the accumulation of dust and other impurities at the mechanical seal. Long-term use will cause wear of the mechanical seal, resulting in problems such as the filter screen being stuck or even the seal failing. 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 screen assembly of a light material separator and a light material separator. By replacing the existing mechanical seal with an air flow sealing form, the sealing effect is good, and there will be no problem of damage to the sealing structure, ensuring the use effect of the light material separator.

[0005] The technical solution adopted by the present invention to solve its technical problems is: A sealing structure of a filter screen assembly of a light material separator, including a housing having a feed chamber and an air outlet chamber. A filter screen assembly is provided on the air flow path formed by the feed chamber and the air outlet chamber. The filter screen assembly is rotatably connected in the housing. An air flow sealing chamber is formed between the outer side of the filter screen assembly and the housing. The housing is provided with a through hole communicating the air flow sealing chamber with the atmosphere. One side of the air flow sealing chamber is separated from the air outlet chamber, and the other side is communicated with the feed chamber. The air pressure in the air flow sealing chamber is greater than the air pressure in the feed chamber, so as to form a sealing air flow flowing from the air flow sealing chamber to the feed chamber.

[0006] Further, in order to prevent the gas in the air flow sealing chamber from flowing into the air outlet chamber, the filter screen assembly has a blocking member, and the blocking member is dynamically sealed with the housing to block the air flow flowing from the air flow sealing chamber to the air outlet chamber.

[0007] Further, in order to stably form a sealed air flow towards the feed chamber, an air flow port that communicates the air flow seal chamber and the feed chamber is formed between the filter screen assembly and the casing, and the width of the air flow port is smaller than the width of the air flow seal chamber.

[0008] Further, in order to form the air flow port and the air flow seal chamber, the filter screen assembly includes a connecting disk, the connecting disk includes a left side, a right side and a middle ring, an air flow port is formed between the outer edge of the left side and the inner wall of the casing, and the area between the casing, the left side, the right side and the middle ring forms an air flow seal chamber.

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

[0010] Further, in order to form a relatively sealed state between the blocking member and the casing, the outer ring of the blocking member fits with the inner wall of the casing, and the inner ring of the blocking member fits with the outer wall of the connecting flange of the casing, thereby blocking the air flow from the air flow seal chamber to the air outlet chamber.

[0011] Further, in order to prevent dust impurities in the air flow from entering the air flow seal chamber, a baffle is further provided in the feed chamber, the baffle is arranged at intervals on the side of the air flow port and axially blocks the air flow port.

[0012] Further, in order to enable the annular baffle to block dust from entering the air flow seal chamber 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] Further, in order to make the air flow inside the air flow seal chamber uniform, the through holes are evenly arranged at intervals in the circumferential direction of the casing.

[0014] The technical solution adopted by the present invention to solve its technical problems is: a light object separator, including a casing, a filter screen assembly and an air shut-off assembly are provided on the casing, and a sealing structure of the above-mentioned filter screen assembly is provided inside the casing.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The sealing structure of the filter screen assembly of the light object separator of the present invention and the light object separator realize the sealing of the filter screen assembly through air flow sealing, preventing dust and impurities in solid waste from damaging the sealing structure, with good sealing effect and ensuring the service life of the light object separator.

[0017] 2. The sealing structure of the filter screen assembly of the light object separator of the present invention and the light object separator prevent the gas in the air flow seal chamber from entering the air outlet chamber through the blocking member, ensuring a stable air pressure difference between the air flow seal chamber and the feed chamber, realizing a constant air flow direction towards the feed chamber, and ensuring the air flow sealing effect.

[0018] 3. The sealing structure of the filter screen assembly of the light material separator of the present invention and the light material separator can prevent dust and impurities in solid waste from entering the airtight cavity through the baffle, further ensuring the effectiveness of airtightness. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the drawings and embodiments.

[0020] Figure 1 It is a schematic structural diagram of the sealing structure of the filter screen assembly of the light material separator of the present invention;

[0021] Figure 2 is Figure 1 a partially enlarged schematic structural diagram of

[0022] Figure 3 It is a three-dimensional schematic diagram of the sealing structure of the filter screen assembly of the light material separator;

[0023] In the figure: 1. Machine shell, 11. Feed cavity, 12. Air outlet cavity, 13. Through hole, 14. Baffle, 2. Filter screen assembly, 21. Airtight cavity, 22. Connection plate, 23. Filter screen, 24. Blocking member, 25. Air port, 3. Airtight component. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The present invention will now be described in further detail with reference to the drawings. These drawings are all simplified schematic diagrams, only showing the basic structure of the present invention in a schematic manner, so they only show the components related to the present invention.

[0025] In the description of the present invention, 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", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is 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, so it should not be construed as a limitation of the present invention. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0026] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "linkage" 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 an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0027] As Figure 1 shown, a lightweight separator includes a housing 1, which has a feed chamber 11 and an air outlet chamber 12, and a filter assembly 2 and an airtight component 3 are provided on the housing 1. The air outlet chamber 12 is communicated with an external air extraction device. The external air extraction device makes the feed chamber 11 and the air outlet chamber 12 in a negative pressure state. The construction solid waste input from the feed chamber 11 is collected from the airtight component 3 below. The air flow carries the light substances in the construction solid waste, including plastic strips, leaves, PVC pipes, etc., which are blocked by the filter screen 23 and discharged from the lower airtight component 3. The filter assembly 2 is connected and rotated by an externally connected power component. The mesh holes on the filter screen 23 ensure the air flow communication between the feed chamber 11 and the air outlet chamber 12, and at the same time prevent the construction waste from entering the air outlet chamber 12. The airtight component 3 and other structures of the lightweight separator can adopt the structures in the patent (CN202211191590.1) previously applied by the applicant or the conventional structures in the art.

[0028] The filter assembly 2 rotates in the housing 1, and the air flow accompanied by impurities will also pass through the filter screen 23. Therefore, a corresponding sealing structure must be provided between the filter assembly 2 and the housing 1.

[0029] Therefore, in this application, the air flow sealing principle is adopted to replace the conventional mechanical sealing structure. The air flow sealing principle will be described in detail below.

[0030] As Figures 2 to 3 shown, an air flow 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 communicates the air flow sealing chamber 21 with the atmosphere. One side of the air flow sealing chamber 21 is separated from the air outlet chamber 12, and the other side is communicated with the feed chamber 11. The air pressure in the air flow sealing chamber 21 is greater than the air pressure in the feed chamber 11, so as to form a sealing air flow flowing from the air flow sealing chamber 21 to the feed chamber 11. The filter assembly 2 has a blocking member 24, and the blocking member 24 is in a dynamic sealing connection with the housing 1 to block the air flow flowing from the air flow sealing chamber 21 to the air outlet chamber 12. An air flow port 25 that communicates the air flow sealing chamber 21 and the feed chamber 11 is formed between the filter assembly and the housing 1.

[0031] The basic principle of air flow sealing is as follows: When the lightweight separator is working, the external air extraction device is started, and both the feed chamber 11 and the air outlet chamber 12 are in a negative pressure state. The air flow moves along the direction of the feed chamber 11, the filter element assembly, and the discharge chamber. Since the air flow sealing chamber 21 is connected to the external atmosphere, the external air flow will enter the air flow sealing chamber 21. Therefore, the pressure in the air flow sealing chamber 21 is greater than that in the feed chamber 11 and the discharge chamber. So, the air flow in the air flow sealing chamber 21 will flow into the feed chamber 11 and the air outlet chamber 12. At this time, since the air flow sealing chamber 21 and the air outlet chamber 12 are separated by the partition 24, the air flow in the air flow sealing chamber 21 cannot enter the air outlet chamber 12. Therefore, the air flow in the air flow sealing chamber 21 can only enter the feed chamber 11. Thus, a stable air flow will be formed on the path of the air flow sealing chamber 21 towards the air outlet 25. The pressure of the air flow here is greater than the air flow pressure from the feed chamber 11 to the air outlet chamber 12, so that the air flow between the feed chamber 11 and the air outlet chamber 12 will not enter the air flow sealing chamber 21, thereby forming an effective seal between the filter element assembly 2 and the housing 1. The sealing air flow direction is as Figure 2 shown by the arrow a in Figure 2 and the air flow directions of the feed chamber 11 and the air outlet chamber 12 are as

[0032] shown by the arrow b in

[0033] The outer ring of the partition 24 fits with the inner wall of the housing 1, and the inner ring of the partition 24 fits with the outer wall of the connecting flange of the housing 1, thereby blocking the air flow from the air flow sealing chamber 21 to the air outlet chamber 12. In this embodiment, the partition 24 can adopt a flexible sealing baffle. Under the blocking action of the sealing baffle, the resistance of the air flow entering the air outlet chamber 12 is large. Therefore, the air flow in the air flow sealing chamber 21 will automatically flow into the feed chamber 11 with a lower pressure. At the same time, the sealing baffle also plays a role in the sealing between the filter element assembly 2 and the housing 1. Under the blocking of the air flow sealing chamber 21, external dust and impurities will not enter the partition 24, avoiding the abrasion of the partition 24 by dust and impurities.

[0034] A baffle 14 is further provided in the feed cavity 11. The baffle 14 is disposed at intervals on the side of the air flow port 25 and axially shields the air flow port 25. 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 for the air flow port 25, blocks the inward flow of the feed cavity 11 in the circumferential direction, avoids the air flow in the feed cavity 11 flowing directly towards the air flow port 25, and prevents a very small amount of dust and impurities from entering the airtight cavity 21 by mistake, further ensuring the sealing effect.

[0035] When the light material separator of the present invention is working normally, the air outlet cavity 12 is connected to an external air suction device. At this time, the inside of the light material separator is under negative pressure. When solid waste is input into the feed cavity 11 from the feed port of the light material separator, the solid waste enters the lower air lock assembly 3 under the action of gravity and air flow. At the same time, due to the effect of airtight sealing, the light waste will not enter the gap between the filter screen 23 and the housing 1, ensuring the sealing effect of the light material separator and extending the service life of the light material separator.

[0036] In summary, the sealing structure of the filter screen assembly of the light material separator of the present invention and the light material separator replace the existing mechanical sealing in the form of airtight sealing, have a good sealing effect, will not have problems with damage to the sealing structure, and ensure the use effect of the light material separator.

[0037] Based on the ideal embodiments of the present invention as an inspiration, through the above description, relevant staff can completely make various changes and modifications within the scope not deviating from the technical idea of this invention. The technical scope of this 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 of a filter screen assembly of a light object separator, comprising a casing (1) having a feed chamber (11) and an air outlet chamber, a filter screen assembly (2) is provided on an air flow path formed by the feed chamber (11) and the air outlet chamber (12), and the filter screen assembly (2) is rotatably connected in the casing (1), characterized in that, An air flow sealing cavity (21) is formed between the outer side of the filter screen assembly (2) and the machine housing (1). The machine housing (1) is provided with a through hole (13) that communicates the air flow sealing cavity (21) with the atmosphere. One side of the air flow sealing cavity (21) is separated from the air outlet cavity (12), and the other side is communicated with the feed cavity (11). The air pressure in the air flow sealing cavity (21) is greater than the air pressure in the feed cavity (11), so as to form a sealed air flow flowing from the air flow sealing cavity (21) to the feed cavity (11). The filter screen assembly (2) has a blocking member (24). The blocking member (24) is dynamically sealed to the machine housing (1). The outer ring of the blocking member (24) fits against the inner wall of the machine housing (1), and the inner ring of the blocking member (24) fits against the outer wall of the connecting flange of the machine housing (1), so as to block the air flow flowing from the air flow sealing cavity (21) to the air outlet cavity (12). The filter screen assembly (2) includes a connecting disk (22). The connecting disk (22) includes a left side, a right side, and a middle ring. An air flow port (25) is formed between the outer edge of the left side and the inner wall of the machine housing (1). The area between the machine housing (1), the left side, the right side, and the middle ring forms the air flow sealing cavity (21). The filter screen (23) of the filter screen assembly (2) is installed on the left side, and the blocking member (24) of the filter screen assembly (2) is installed on the right side.

2. The sealing structure of the filter screen assembly of the light object separator according to claim 1, characterized in that, An air flow port (25) that communicates the air flow sealing cavity (21) and the feed cavity (11) is formed between the filter screen assembly (2) and the machine housing (1). The width of the air flow port (25) is smaller than the width of the air flow sealing cavity (21).

3. The sealing structure of the filter screen assembly of the light object separator according to claim 1, characterized in that, A baffle (14) is further provided in the feed cavity (11). The baffle (14) is arranged at intervals on the side of the air flow port (25) and axially blocks the air flow port (25).

4. The sealing structure of the filter screen assembly of the light object separator according to claim 3, characterized in that, The baffle (14) is an annular baffle arranged along the outer circle of the filter screen (23).

5. The sealing structure of the filter screen assembly of the lightweight separator according to claim 1, characterized in that, The through holes (13) are evenly arranged at intervals in the circumferential direction of the machine housing (1).

6. A lightweight object separator, characterized in that, It includes a machine housing (1). The machine housing (1) is provided with a filter screen assembly and a air shut-off assembly (3). The machine housing (1) is internally provided with the sealing structure of the filter screen assembly according to any one of claims 1-5.

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