Dust removal equipment and process suitable for wind power dry separator

Abstract

The invention relates to the technical field of dust removal of wind power dry separators, one embodiment of the invention provides dust removal equipment and process suitable for a wind power dry separator, the dust removal equipment suitable for the wind power dry separator is applied to the wind power dry separator, and the dust removal equipment suitable for the wind power dry separator further comprises a multi-layer platform, a dust suction hood, a bag type dust collector and a dust suction mechanism; the pneumatic dry separator is installed on the multi-layer platform, the dust hood is arranged in the pneumatic dry separator through a lifting mechanism, the multi-layer platform is fixedly connected with a top frame capable of supporting the dust hood to ascend and descend, and the bag type dust collector is located on one side of the multi-layer platform. The technical problems that negative pressure is only formed on the periphery of the machine surface of the sorting machine, a sorted product blanking point is far away from a dust hood, the height difference is large, a large amount of dust is generated in the material falling process, dust on an overhaul platform is not cleaned in time, vibration is generated in the equipment operation process, and dusting and secondary pollution are caused are solved.

Description

TECHNICAL FIELD

[0001] Embodiments of the present disclosure relate to the technical field of dust removal of wind dry sorting machines, in particular, to a dust removal device and process suitable for a wind dry sorting machine. BACKGROUND

[0002] A wind dry sorting machine is a device that realizes sorting by using wind power, gravity and material characteristic differences, and is composed of a wind supply device, a sorting device, a dust removal and collection device and the like. The wind dry sorting machine has the characteristics of no water use, low energy consumption and small land occupation, can be adapted to different materials by adjusting the wind speed or vibration parameters, and is widely used in ore pre-sorting, coal sorting and waste residue recycling fields.

[0003] The existing wind sorting machine sets a dust hood on the upper part of the sorting bed surface and uses a bag-type dust collector for negative pressure dust removal. However, in actual use, a large amount of dust pollution is still generated around the wind sorting machine, and the reasons are mainly as follows: the dust hood is set on the upper part of the sorting machine bed surface, only negative pressure is formed around the sorting machine bed surface, the sorting product dropping point is far away from the dust hood and has a large height difference, a large amount of dust is generated during the falling of the material, the dust on the maintenance platform is not cleaned in time, and vibration is generated during the operation of the equipment, which leads to dust raising and secondary pollution. SUMMARY

[0004] To overcome the above defects, embodiments of the present disclosure provide a dust removal device and process suitable for a wind dry sorting machine, which solves the technical problem that in the prior art, the dust hood is set on the upper part of the sorting machine bed surface, only negative pressure is formed around the sorting machine bed surface, the sorting product dropping point is far away from the dust hood and has a large height difference, a large amount of dust is generated during the falling of the material, the dust on the maintenance platform is not cleaned in time, vibration is generated during the operation of the equipment, which leads to dust raising and secondary pollution.

[0005] According to one aspect, at least one embodiment of the present disclosure provides a dust removal device suitable for a wind dry sorting machine, which is applied to the wind dry sorting machine and further comprises a multi-layer platform, a dust hood, a bag-type dust collector and a dust suction mechanism. The wind dry sorting machine is installed on the multi-layer platform, the dust hood is arranged in the wind dry sorting machine through a lifting mechanism, a top frame capable of supporting the lifting of the dust hood is fixedly connected to the multi-layer platform, the lifting mechanism is used to drive the lifting and movement of the dust hood on the top frame, the bag-type dust collector is located on one side of the multi-layer platform, an input end of the bag-type dust collector is communicated with the dust hood through a dust removal mechanism, the dust removal mechanism is used to absorb and remove the dust stirred up in the wind dry sorting machine, and the dust suction mechanism is arranged on the dust removal mechanism and used to absorb the dust on the multi-layer platform.

[0006] In order to drive the dust cover to move up and down in the wind power dry cleaning machine, the lifting mechanism comprises: sliding ring, connecting frame and sealing assembly, the sliding ring is provided with multiple, multiple sliding ring is slidably connected on the top frame, each sliding ring is fixedly connected with the connecting frame, the bottom end of each adjacent two connecting frames is fixedly connected with the connecting plate capable of connecting the dust cover, two connecting plates are fixedly connected with the dust cover, the sealing assembly is arranged on the multiple connecting frames, and the dust cover and the inner wall of the wind power dry cleaning machine are sealed.

[0007] In order to seal between the dust cover and the wind power dry cleaning machine, the sealing assembly comprises: sealing frame, sliding frame and support assembly, the sealing frame is arranged in the wind power dry cleaning machine, and the inner wall of the sealing frame is in contact with the dust cover, the top end of the sealing frame is fixedly connected with multiple sliding frames, the top end of each sliding frame is slidably connected with the corresponding connecting frame, and the support assembly is fixedly connected on each adjacent two sliding frames, for supporting the sealing frame to abut against the dust cover.

[0008] In order to support the sealing frame to abut against the gap between the dust cover and the wind power dry cleaning machine, the support assembly comprises: support frame, slide rod and supporting spring, the support frame is fixedly connected at the top end of the two adjacent sliding frames, the slide rod is provided with two, the two slide rods are fixedly connected at the top end of the support frame, the limiting plate is fixedly connected on the two adjacent connecting frames, two slide holes are formed in the limiting plate, the two slide rods are slidably connected in the two slide holes, the supporting spring is sleeved on the two slide rods, and the two ends of the two supporting springs are fixedly connected with the limiting plate and the support frame.

[0009] In order to increase the stability of the sliding frame when sliding on the connecting frame, the sliding groove is formed in the connecting frame, the top end of the sliding frame is fixedly connected with the sliding block, and the sliding block is slidably connected in the sliding groove.

[0010] In order to produce negative pressure in the dust cover and collect dust, the dust removal mechanism comprises: dust removal pipe, hose net and air outlet assembly, the dust removal pipe is communicated with the input end of the bag type dust collector, the bottom end of the hose net is communicated with the dust cover, the other end of the hose net is communicated with the dust removal pipe, and the air outlet assembly is arranged on one side of the bag type dust collector.

[0011] In order to produce negative pressure in the bag type dust collector, the air outlet assembly comprises: air inlet pipe and air inlet fan, one end of the air inlet pipe is communicated with the bag type dust collector, the bottom end of the air inlet pipe is communicated with the input end of the air inlet fan, and the output end of the air inlet fan is communicated with the air outlet pipe capable of discharging the gas in the bag type dust collector.

[0012] In order to absorb and remove dust on the multi-layer platform, the dust collection mechanism comprises a dust collection pipe and platform cleaning branch valve, the top end of the dust collection pipe is communicated with a dust removal pipe, and a plurality of platform cleaning branch valves are arranged.

[0013] In order to drive the limiting plate and the connecting frame to move up and down, the top end of the top frame is provided with a driving mechanism, the driving mechanism comprises a driving screw, a driving plate and a motor, the driving screw is rotatably connected to the top frame, the driving plate is fixedly connected to the limiting plate, a screw hole is formed in the driving plate, the driving screw is threadedly connected to the screw hole, the motor is installed at the top end of the top frame, and the output end of the motor penetrates through the top frame and is fixedly connected with the driving screw.

[0014] A dust removal process suitable for a wind dry separator uses a dust removal device suitable for a wind dry separator according to the above scheme, and comprises the following steps. Step one, lifting and dust removal, when the dust collection cover is far away from the product falling point, the motor drives the driving screw to rotate, the driving screw drives the limiting plate and the connecting frame to descend when rotating, the sliding ring on the top frame slides downward at this time, thereby driving the dust collection cover and the wind dry separator to descend, so that the dust collection cover is close to the product falling point, and the dust generated during the product falling is absorbed; Step two, dust collection cover dust collection, the air is blown out through the air outlet pipe of the induced draft fan box, and the dust in the dust collection cover is sucked into the bag type dust collector through the hose net and the dust collection pipe; Step three, dust collection cover sealing, the supporting frame is supported downward by the supporting spring, the sliding rod on the limiting plate slides at this time, and the sliding frame on the connecting frame slides downward, thereby driving the sealing frame to abut against the dust collection cover and the wind dry separator, and sealing the dust collection cover and the wind dry separator.

[0015] The embodiments of the present disclosure have the following beneficial effects: In the present disclosure, through the arrangement of the multi-layer platform, the dust collection cover, the bag type dust collector, the lifting mechanism, the dust removal mechanism and the dust collection mechanism, a large amount of dust generated during the falling of the material can be absorbed and removed, the labor intensity of the worker platform and ground cleaning is reduced, and the vibration generated during the operation of the equipment is effectively prevented, the dusting caused by the vibration is prevented, and the secondary pollution is prevented. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed in the description of the embodiments of the present disclosure will be briefly introduced. Obviously, the drawings in the following description are only some example embodiments of the present disclosure. Those skilled in the art can obtain other drawings according to the content of the example embodiments of the present disclosure and the drawings without creating any creative labor.

[0017] Figure 1 Structure diagram of the whole for one embodiment of the present disclosure; Figure 2 Structure diagram of the whole for one embodiment of the present disclosure from another angle; Figure 3 Structure diagram of the top frame and lifting mechanism for one embodiment of the present disclosure; Figure 4 Structure diagram of the lifting mechanism for one embodiment of the present disclosure; Figure 5 Structure diagram of the dust removal mechanism and dust suction mechanism for one embodiment of the present disclosure; Figure 6 Structure diagram of the dust suction mechanism for one embodiment of the present disclosure; Figure 4 Structure diagram of the local enlargement at A in the above figure; Figure 7 Structure diagram of the dust suction mechanism for one embodiment of the present disclosure; Figure 4 Structure diagram of the local enlargement at B in the above figure.

[0018] In the figure: 1, wind dry separator; 2, multi-layer platform; 3, dust suction cover; 4, top frame; 5, bag-type dust collector; 6, sliding ring; 7, connecting frame; 8, connecting plate; 9, sealing frame; 10, sliding frame; 11, support frame; 12, sliding rod; 13, limiting plate; 14, support spring; 15, sliding block; 16, dust removal pipe; 17, hose net; 18, air duct; 19, air blower; 20, air outlet pipe; 21, dust suction pipe; 22, platform cleaning branch valve; 23, drive screw; 24, drive plate; 25, motor. DETAILED DESCRIPTION The present disclosure will be further described below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present disclosure, but not to limit the present disclosure.

[0019] In order to make the drawing simple, only the parts related to the disclosure are shown in each figure, which does not represent the actual structure of the product. In addition, in order to make the drawing simple and easy to understand, in some figures, only one of the parts with the same structure or function is shown, or only one of them is marked. In this paper, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0020] In this document, unless otherwise indicated and limited, the terms "mount", "connect", "connection" should be understood broadly, for example, it can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0021] In the present disclosure, unless otherwise specified and limited, the "upper" or "lower" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "under" and "under" of the first feature to the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0022] In the description of the present embodiment, the orientation or position relationship of the terms "upper", "lower", "left", "right" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present disclosure.

[0023] In addition, in the description of the present application, the terms "first", "second" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0024] Embodiment one, such as Figures 1-7As shown, it shows a dust removal device suitable for a wind dry separator 1 in an embodiment of the present disclosure, which is applied to the wind dry separator 1, and further comprises: a multi-layer platform 2, a dust suction cover 3, a bag type dust collector 5 and a dust suction mechanism, the wind dry separator 1 is installed on the multi-layer platform 2, the dust suction cover 3 is arranged in the wind dry separator 1 through a lifting mechanism, the multi-layer platform 2 is fixedly connected with a top frame 4 capable of supporting the lifting of the dust suction cover 3, the lifting mechanism is used to drive the lifting movement of the dust suction cover 3 on the top frame 4, the bag type dust collector 5 is located on one side of the multi-layer platform 2, the input end of the bag type dust collector 5 is communicated with the dust suction cover 3 through a dust removal mechanism, the dust removal mechanism is used to absorb the dust stirred up in the wind dry separator 1, the dust suction mechanism is arranged on the dust removal mechanism and is used to absorb the dust on the multi-layer platform 2, through the arrangement of the multi-layer platform 2, the dust suction cover 3, the bag type dust collector 5, the lifting mechanism, the dust removal mechanism and the dust suction mechanism, a large amount of dust generated in the falling process of the material can be absorbed and removed, the labor intensity of the worker platform and the ground cleaning is reduced, and the vibration generated in the operation process of the equipment is effectively prevented, the dusting caused by the vibration is prevented, and the phenomenon of secondary pollution is caused.

[0025] The lifting mechanism comprises sliding rings 6, connecting frames 7 and a sealing assembly. The sliding rings 6 are provided in plurality, and each of the sliding rings 6 is slidingly connected to the top frame 4. Each of the sliding rings 6 is fixedly connected with a connecting frame 7. The bottom end of each adjacent two connecting frames 7 is fixedly connected with a connecting plate 8 capable of connecting the dust cover 3. The two connecting plates 8 are fixedly connected with the dust cover 3. The sealing assembly is arranged on the connecting frames 7, and is used for sealing the dust cover 3 and the inner wall of the wind force dry cleaning machine 1. The sealing assembly comprises a sealing frame 9, sliding frames 10 and a supporting assembly. The sealing frame 9 is arranged in the wind force dry cleaning machine 1, and the inner wall of the sealing frame 9 is in contact with the dust cover 3. The top end of the sealing frame 9 is fixedly connected with the sliding frames 10 in plurality. The top end of each of the sliding frames 10 is slidingly connected with the corresponding connecting frame 7. A sliding groove is arranged on the connecting frame 7. The top end of the sliding frame 10 is fixedly connected with a sliding block 15. The sliding block 15 is slidingly connected in the sliding groove. The supporting assembly is fixedly connected with the sliding frames 10 in adjacent two. The supporting assembly is used for supporting the sealing frame 9 to abut against the dust cover 3. The supporting assembly comprises a supporting frame 11, sliding rods 12 and supporting springs. The supporting frame 11 is fixedly connected with the top end of the sliding frames 10 in adjacent two. The sliding rods 12 are provided in two. The two sliding rods 12 are fixedly connected with the top end of the supporting frame 11. Limiting plates 13 are fixedly connected with the connecting frames 7 in adjacent two. Two sliding holes are arranged on the limiting plate 13. The two sliding rods 12 are slidingly connected in the two sliding holes. The two sliding rods 12 are sleeved with the supporting springs 14 in two. The two ends of the supporting springs 14 are fixedly connected with the limiting plate 13 and the supporting frame 11 respectively. The top end of the top frame 4 is provided with a driving mechanism. The driving mechanism comprises a driving screw 23, a driving plate 24 and a motor 25. The driving screw 23 is rotatably connected with the top frame 4. The driving plate 24 is fixedly connected with the limiting plate 13. A screw hole is arranged on the driving plate 24. The driving screw 23 is threadedly connected with the screw hole. The motor 25 is installed at the top end of the top frame 4. The output end of the motor 25 penetrates through the top frame 4 and is fixedly connected with the driving screw 23. The motor 25 drives the driving screw 23 to rotate. When the driving screw 23 rotates, the driving plate 24 and the limiting plate 13 are driven to move up and down. When the limiting plate 13 moves up and down, the connecting frames 7 and the sliding rings 6 are driven to slide up and down on the top frame 4, thereby driving the dust cover 3 to move up and down in the wind force dry cleaning machine 1, so as to adjust the dust cleaning height of the dust cover 3 in the wind force dry cleaning machine 1. When the dust cover 3 moves up and down, the supporting springs 14 continuously press the supporting frame 11 downward. At this time, the sliding rods 12 are adaptively slid in the sliding holes arranged on the limiting plate 13, thereby driving the sealing frame 9 to abut against the dust cover 3 and the inner wall of the wind force dry cleaning machine 1, so as to seal between the dust cover 3 and the wind force dry cleaning machine 1.

[0026] The dust removal mechanism comprises a dust removal pipe 16, a hose network 17 and an air outlet assembly. The dust removal pipe 16 is connected to the input end of the bag-type dust collector 5. The bottom end of the hose network 17 is connected to the dust suction cover 3. The other end of the hose network 17 is connected to the dust removal pipe 16. The air outlet assembly is arranged on one side of the bag-type dust collector 5 and is used for guiding the air in the bag-type dust collector 5 to the outside. The air outlet assembly comprises an air guiding pipe 18 and an air guiding fan 19. One end of the air guiding pipe 18 is connected to the bag-type dust collector 5. The bottom end of the air guiding pipe 18 is connected to the input end of the air guiding fan 19. The output end of the air guiding fan 19 is connected to an air outlet pipe 20 which is used for discharging the gas in the bag-type dust collector 5. The air outlet pipe 20 is used for discharging the air by the air guiding fan 19, so that the air suction negative pressure is generated in the dust removal pipe 16 and the hose network 17, thereby the dust in the wind power dry cleaning machine 1 is sucked and removed by the dust suction cover 3.

[0027] The dust removal mechanism comprises a dust removal pipe 16, a hose network 17 and an air outlet assembly. The dust removal pipe 16 is connected to the input end of the bag-type dust collector 5. The bottom end of the hose network 17 is connected to the dust suction cover 3. The other end of the hose network 17 is connected to the dust removal pipe 16. The air outlet assembly is arranged on one side of the bag-type dust collector 5 and is used for guiding the air in the bag-type dust collector 5 to the outside. The air outlet assembly comprises an air guiding pipe 18 and an air guiding fan 19. One end of the air guiding pipe 18 is connected to the bag-type dust collector 5. The bottom end of the air guiding pipe 18 is connected to the input end of the air guiding fan 19. The output end of the air guiding fan 19 is connected to an air outlet pipe 20 which is used for discharging the gas in the bag-type dust collector 5. The air outlet pipe 20 is used for discharging the air by the air guiding fan 19, so that the air suction negative pressure is generated in the dust removal pipe 16 and the hose network 17, thereby the dust in the wind power dry cleaning machine 1 is sucked and removed by the dust suction cover 3.

[0028] Further based on the embodiment one, the dust removal process suitable for the wind power dry cleaning machine 1 is disclosed, which uses the dust removal equipment suitable for the wind power dry cleaning machine 1 and comprises the following steps. Step one, lifting and dust removal. When the dust suction cover 3 is far away from the product falling point, the driving screw 23 is driven to rotate by the motor 25. When the driving screw 23 rotates, the limiting plate 13 and the connecting frame 7 are driven to descend. At this time, the sliding ring 6 slides downward on the top frame 4, thereby driving the dust suction cover 3 to descend in the wind power dry cleaning machine 1, so that the dust suction cover 3 is close to the product falling point and the dust generated when the product falls is sucked. Step two, dust suction by the dust suction cover 3. The air is blown out of the air outlet pipe 20 by the air guiding fan 19, and the dust in the dust suction cover 3 is sucked into the bag-type dust collector 5 through the hose network 17 and the dust suction pipe 21. Step three, sealing of the dust suction cover 3. The supporting frame 11 is supported downward by the supporting spring 14. At this time, the sliding rod 12 slides on the limiting plate 13 and drives the sliding frame 10 to slide downward on the connecting frame 7, thereby driving the sealing frame 9 to abut against the dust suction cover 3 and the wind power dry cleaning machine 1, so that the dust suction cover 3 and the wind power dry cleaning machine 1 are sealed.

[0029] It should be noted that the above examples are only used to illustrate the technical solutions of the present disclosure rather than limit the present disclosure. Although the present disclosure is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present disclosure can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present disclosure, and all should be covered in the scope of the claims of the present disclosure.

Claims

1. A dust removal device suitable for a wind force dry separator, which is applied on a wind force dry separator (1), characterized in that, Also include: Multi-layer platform (2), the wind dry separator (1) is installed on the multi-layer platform (2); Dust cover (3), the dust cover (3) is arranged in the wind dry separator (1) by lifting mechanism, the multi-layer platform (2) is fixedly connected with top frame (4) capable of supporting the lifting of dust cover (3), and the lifting mechanism is used to drive the lifting movement of dust cover (3) on top frame (4); Bag type dust collector (5), the bag type dust collector (5) is located on one side of the multi-layer platform (2), and the input end of the bag type dust collector (5) is communicated with the dust cover (3) through the dust removal mechanism, and the dust removal mechanism is used to absorb the dust stirred in the wind dry separator (1); Dust removal mechanism, the dust removal mechanism is arranged on the dust removal mechanism, and is used to absorb the dust on the multi-layer platform (2).

2. A dust removal apparatus suitable for a wind sifter according to claim 1, characterized in that, The lifting mechanism comprises: Slide ring (6), a plurality of slide rings (6) are provided, and the plurality of slide rings (6) are all slidably connected on the top frame (4); Connecting frame (7), the connecting frame (7) is fixedly connected on each slide ring (6), and the bottom end of each adjacent two connecting frames (7) is fixedly connected with connecting plate (8) capable of connecting dust cover (3), and the two connecting plates (8) are fixedly connected with dust cover (3); Sealing assembly, the sealing assembly is arranged on a plurality of connecting frames (7), and is used to seal the inner wall of dust cover (3) and wind dry separator (1).

3. A dust extraction apparatus suitable for use in a pneumatic dry separator according to claim 2, wherein, The sealing assembly comprises: Sealing frame (9), the sealing frame (9) is arranged in the wind dry separator (1), and the inner wall of the sealing frame (9) is in contact with the dust cover (3); Slide frame (10), a plurality of slide frames (10) are fixedly connected to the top end of the sealing frame (9), and the top end of each slide frame (10) is slidably connected to the corresponding connecting frame (7); Support assembly, support assembly is fixedly connected on each adjacent two slide frames (10), and is used to support the sealing frame (9) and abut on the dust cover (3).

4. A dust extraction apparatus suitable for use in a wind sifter as claimed in claim 3, wherein, The support assembly comprises: Support frame (11), the support frame (11) is fixedly connected to the top end of the adjacent two slide frames (10); Slide rod (12), two slide rods (12) are provided, and the two slide rods (12) are fixedly connected to the top end of the support frame (11), and a limiting plate (13) is fixedly connected on the adjacent two connecting frames (7), two slide holes are formed in the limiting plate (13), and the two slide rods (12) are slidably connected in the two slide holes respectively; Support spring (14), the support spring (14) is sleeved on the two slide rods (12), and the two ends of the two support springs (14) are fixedly connected with the limiting plate (13) and the support frame (11) respectively.

5. A dust extraction apparatus suitable for use in a wind sifter as claimed in claim 3, wherein, The connecting frame (7) is provided with a sliding groove, the top end of the slide frame (10) is fixedly connected with a sliding block (15), and the sliding block (15) is slidably connected in the sliding groove.

6. A dust extraction apparatus suitable for use in a wind sifter as claimed in claim 1, characterised in that, The dust removal mechanism comprises: A dust removal pipe (16) is communicated with the input end of the bag type dust collector (5); A hose network (17) is communicated with the dust hood (3) at the bottom end, and the other end of the hose network (17) is communicated with the dust removal pipe (16); An air outlet assembly is arranged on one side of the bag type dust collector (5) and used for guiding air in the bag type dust collector (5) to the outside.

7. A dust extraction apparatus suitable for use in a wind sifter as claimed in claim 6, characterised in that, The air outlet assembly comprises: An air guide pipe (18) is communicated with the bag type dust collector (5) at one end; An air guide fan (19) is communicated with the input end of the air guide fan (19) at the bottom end of the air guide pipe (18), and the output end of the air guide fan (19) is communicated with an air outlet pipe (20) capable of discharging the gas in the bag type dust collector (5).

8. A dust extraction apparatus suitable for use in a wind sifter as claimed in claim 6, characterised in that, The dust suction mechanism comprises: A dust suction pipe (21) is communicated with the dust removal pipe (16) at the top end; A plurality of platform cleaning branch pipe valves (22) are arranged, and the platform cleaning branch pipe valves (22) are communicated with one side of the dust suction pipe (21).

9. A dust extraction apparatus suitable for use in a wind sifter as claimed in claim 4, characterised in that, A driving mechanism is arranged at the top end of the top frame (4), and the driving mechanism comprises: A driving screw (23) is rotationally connected to the top frame (4); A driving plate (24) is fixedly connected to the limiting plate (13), and a threaded hole is formed in the driving plate (24); and the driving screw (23) is threadedly connected to the threaded hole. A motor (25) is arranged at the top end of the top frame (4), and the output end of the motor (25) penetrates the top frame (4) and is fixedly connected to the driving screw (23).

10. A dedusting process for a pneumatic dry cleaning machine, using a dedusting apparatus for a pneumatic dry cleaning machine according to any one of claims 1 to 9, characterized in that, The method comprises the following steps: S1, dust removal, when the dust hood (3) is far away from the product sorting and discharging point, the motor (25) drives the driving screw (23) to rotate, the driving screw (23) drives the limiting plate (13) and the connecting frame (7) to descend when rotating, the sliding ring (6) slides downward on the top frame (4) at this time, thereby driving the dust hood (3) and the air selection machine (1) in the dust hood (3) to descend, so that the dust hood (3) is close to the product sorting and discharging point, and the dust generated when the product is discharged is absorbed; S2, dust suction of the dust hood (3), air is blown out of the air outlet pipe (20) of the air guide fan (19) box, and the dust in the dust hood (3) is sucked through the air guide pipe (18) and enters the bag type dust collector (5) through the hose network (17) and the dust suction pipe (21); S3, sealing of the dust hood (3), the supporting frame (11) is supported downward by the supporting spring (14), the sliding rod (12) slides on the limiting plate (13) at this time, and the sliding frame (10) slides downward on the connecting frame (7), thereby driving the sealing frame (9) to abut against the dust hood (3) and the air selection machine (1), and the dust hood (3) and the air selection machine (1) are sealed.

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