A quick and dust-free powder feeding station

Abstract

The application relates to the technical field of powder processing, and particularly discloses a quick dust-free powder feeding station, which comprises a first connecting support and a feeding outer shell arranged on the first connecting support. The upper end of the feeding outer shell is connected with a dust collector, the upper end of the dust collector is connected with a dust suction pump, the dust suction pump is connected with a control mechanism outside the feeding outer shell through a connecting line arranged on the dust suction pump, and the bottom of the first connecting support is provided with a screening hopper which is in communication with the feeding outer shell. The quick dust-free powder feeding station can adjust the coincident pore size of the powder screening mesh by rotating the screening mesh sleeve, can screen the powder with different particle sizes, can automatically clean and discharge the residual granular powder after adjusting the diameter, prevents the first, second and third screening meshes from being blocked and affecting the later use, reduces the manual operation time, and improves the work efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of powder processing, in particular to a rapid dust-free powder feeding station. BACKGROUND

[0002] The dust-free feeding station, also known as a dust-free vibrating screen, is a screening device that achieves dust suppression through closed design and negative pressure airflow control. Its core features are the fully enclosed structure and dust emission control technology, making it suitable for industries with high cleanliness requirements such as food and medicine.

[0003] The existing dust-free vibrating screen pours the raw materials into the interior of the vibrating screen, performs vibrating screening, and discharges and collects the screened particles from the screen mesh. By replacing the screen mesh, different particle size powder materials can be screened, such as:

[0004] The environmental protection type dust-free feeding station provided in the publication No. CN113120644A includes a dust-free feeding station body, a feeding cavity is arranged on the dust-free feeding station body, a feeding preliminary screening device is arranged on the feeding cavity, a buffer filtering screening device is arranged in the feeding cavity, the feeding preliminary screening device includes a feeding box, the feeding box is arranged at the top of the feeding cavity, the top of the feeding box is open, the bottom of the feeding box is in communication with the feeding cavity, a box cover is hingedly arranged on the top opening of the feeding box, a grid-shaped conveyor belt and a screen plate are sequentially arranged in the feeding box from top to bottom, left and right material pouring plates are arranged on the inner wall of the feeding cavity above the grid-shaped conveyor belt, and a plurality of upper oscillation rod groups are arranged on the inner wall of the feeding box between the left and right material pouring plates. The present application has the advantages of effectively removing dust generated during feeding through layer-by-layer screening of the material, reducing environmental pollution, etc.

[0005] The existing technical solution has the following defects: the existing dust-free feeding station needs to replace the screen mesh when screening different particle size powder materials, which is not convenient for automatic adjustment of the mesh, and the adjusted screen mesh cannot automatically collect the remaining powder, and the mesh is easily blocked during screening. Therefore, the present application provides a rapid dust-free powder feeding station to solve the above problems. SUMMARY

[0006] The present application aims to provide a rapid dust-free powder feeding station to solve the problems of replacing the screen mesh when screening different particle size powder materials, which is not convenient for automatic adjustment of the mesh, and the adjusted screen mesh cannot automatically collect the remaining powder, and the mesh is easily blocked during screening.

[0007] In order to achieve the above object, the present application provides the following technical scheme: a kind of powder quick dust-free feeding station, comprising: first connecting support, and the outer shell of material inlet is arranged on the first connecting support, the upper end of the outer shell of material inlet is connected with dust collector, and the upper end of dust collector is connected with dust collection pump, and dust collection pump is connected with the control mechanism outside the outer shell of material inlet by the connecting line on it;

[0008] The bottom of the first connecting support is provided with a sieve hopper communicated with the outer shell of material inlet, and the outer side of the sieve hopper is provided with a second connecting support, the outer surface of the sieve hopper is provided with an adapter plate, and the outer end of the adapter plate is fixed with a vibrator by bolts, the inside of the sieve hopper is superimposed with a first sieve net sleeve and a second sieve net sleeve, the inside of the first sieve net sleeve and the second sieve net sleeve is respectively provided with a first sieve net hole and a second sieve net hole, wherein the first sieve net sleeve and the second sieve net sleeve are relatively rotated by the adapter assembly arranged at the bottom to adjust the overlapping range of the first sieve net hole and the second sieve net hole.

[0009] As a preferred technical scheme of the present application, the outer end of the sieve hopper is provided with a first motor, and the output end of the first motor is connected with an adapter disc, and the outer side of the adapter disc is provided with a limiting block connected to the outer surface of the second sieve net sleeve.

[0010] As a preferred technical scheme of the present application, the limiting block and the adapter disc are connected in meshing mode.

[0011] As a preferred technical scheme of the present application, the first sieve net hole and the second sieve net hole are uniformly opened at equal angles on the outer surfaces of the first sieve net sleeve and the second sieve net sleeve, respectively, and the outer surface of the first sieve net sleeve is attached to the inner wall of the second sieve net sleeve, and the first sieve net sleeve is connected by clamping the positioning block and the second sieve net sleeve;

[0012] The top outer end of the first sieve net sleeve is connected with a positioning block, and the outer end of the second sieve net sleeve is provided with a limiting rod.

[0013] As a preferred technical scheme of the present application, the adapter assembly comprises a first sieve net plate arranged at the bottom of the first sieve net sleeve, the bottom of the second sieve net sleeve is provided with a second sieve net plate, the upper end of the first sieve net plate is symmetrically provided with a first auxiliary block, the upper end of the second sieve net plate is symmetrically connected with a second auxiliary block, the inside of the first sieve net plate and the second sieve net plate is uniformly provided with a third sieve net hole, the shaft center of the second sieve net plate is provided with a mounting shell, and the inside of the mounting shell is mounted with a second motor;

[0014] The first sieve net sleeve is connected by clamping the first auxiliary block and the first sieve net plate;

[0015] The second motor is connected with the first sieve net sleeve through the output end to play the role of adjusting the gap.

[0016] As a preferred technical scheme of the present application, the inner side of the screening hopper is provided with a mounting groove, and a third electric mounting telescopic rod is arranged inside the mounting groove.

[0017] As a preferred technical scheme of the present application, the inner wall of the screening hopper is provided with a second electric mounting telescopic rod, and a first cleaning brush is connected to the outer side of the second electric mounting telescopic rod.

[0018] As a preferred technical scheme of the present application, the second screening net sleeve is oppositely clamped with the second screening net plate through a second auxiliary block, the lower surface of the second screening net plate is arranged in abutment with the upper surface of the abutment bottom plate, and the abutment bottom plate is provided with a hole structure at equal angles inside.

[0019] As a preferred technical scheme of the present application, the abutment plate is connected with the second connecting support through the telescopic spring at the lower end thereof, the outer end of the inlet casing is rotatably connected with a casing cover, and the outer end of the casing cover is rotatably connected with a first electric mounting telescopic rod.

[0020] As a preferred technical scheme of the present application, the limiting rods are symmetrically arranged at the outer end of the second screening net sleeve, and the limiting rods are slidably connected with the screening hopper through the abutment grooves at the outer sides thereof.

[0021] Compared with the prior art, the present application has the following beneficial effects: the powder rapid dust-free feeding station can adjust the overlapping pore size of the powder screening mesh by rotating the screening net sleeve, can screen the powder with different particle sizes, can automatically clean and discharge the remaining particle powder after adjusting the diameter, prevents the first screening mesh and the second screening mesh and the third screening mesh from being blocked inside to affect the later use, reduces the manual operation time, and improves the work efficiency.

[0022] 1. The bottom of the first screening net sleeve and the second screening net sleeve is provided with an adjustable abutment assembly, the first screening net sleeve is clamped and connected with the first screening net plate through a first auxiliary block, the first screening net plate drives the first auxiliary block to rotate the first screening net sleeve, the first screening mesh and the second screening mesh are evenly arranged at equal angles on the outer surfaces of the first screening net sleeve and the second screening net sleeve, the outer surface of the first screening net sleeve is arranged in abutment with the inner wall of the second screening net sleeve, the overlapping pores of the first screening mesh and the second screening mesh adjust the size of the screening pores, and the first screening net sleeve and the second screening net sleeve can be used for screening the powder with different particles under the cooperation of rotation.

[0023] 2. The limiting block and the connecting plate are connected by meshing. The limiting block drives the second screen sleeve to rotate. When the second screen sleeve rotates, the bottom of the second screen sleeve is fixed with the mounting housing by bolts. Thus, the rotation of the second screen sleeve causes the first screen sleeve to rotate as well. The powder in the first screen sleeve is screened and rotated through the screen holes in the first and second screen holes and discharged to the outside of the first screen holes. The limiting rod is symmetrically arranged at the outer end of the second screen sleeve, and the limiting rod is slidably connected to the screen hopper through the connecting groove on its outer side. When the second screen sleeve rotates, the limiting rod slides inside the connecting groove, thereby moving the second screen sleeve stably.

[0024] 3. The second screen sleeve is engaged with the second screen plate via the second auxiliary block, causing the connecting base plate to disengage from the first and second screen plates. This disengages the first and second auxiliary blocks from the first and second screen sleeves, respectively. Activation of the second electric installation telescopic rod moves the first cleaning brush, bringing it into contact with the outer surface of the second screen sleeve. The rotation of the connecting plate causes the second screen sleeve to rotate, wiping and cleaning the powder inside the first and second screen holes to prevent blockage. Activation of the electric telescopic rod also moves the second cleaning brush downwards, bringing it into contact with the surface of the first screen plate. The rotation of the second screen sleeve then concentrates and cleans any remaining large particles of powder from the surface of the first screen plate, discharging them from the bottom of the sieve hopper for simultaneous cleaning. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a schematic cross-sectional view of the connection between the second screen sleeve and the first screen plate of the present invention.

[0027] Figure 3 This is a schematic diagram of the overall cross-sectional structure of the first screen plate and the second screen plate of the present invention;

[0028] Figure 4 For the present invention Figure 2 Enlarged structural diagram at point A in the middle;

[0029] Figure 5 This is a schematic diagram of the overall cross-sectional structure of the connection between the limiting rod and the second screen sleeve in this invention;

[0030] Figure 6 This is a schematic cross-sectional view of the connection between the limiting block and the second screen sleeve in this invention.

[0031] Figure 7The second motor of the application is connected with the first screen plate, and the overall section structure schematic diagram is shown in the figure;

[0032] Figure 8 The first screen sleeve of the application is connected with the second screen sleeve, and the overall explosion structure schematic diagram is shown in the figure. Figure 6 The enlarged structure schematic diagram of B in the application is shown in the figure.

[0033] Figure 9 The first screen sleeve of the application is connected with the second screen sleeve, and the overall explosion structure schematic diagram is shown in the figure.

[0034] In the figure: 1, first connecting support; 2, feeding outer shell; 3, dust collector; 4, dust suction pump; 5, connecting line; 6, control mechanism; 7, outer shell cover; 8, first electrically installed telescopic rod; 9, feeding port; 10, screening hopper; 11, second connecting support; 12, telescopic spring; 13, linking plate; 14, vibrator; 15, first motor; 16, linking disc; 17, linking groove; 18, first cleaning brush; 19, second electrically installed telescopic rod; 20, first screen sleeve; 21, first screen hole; 22, positioning block; 23, second screen sleeve; 24, second screen hole; 25, first screen plate; 26, second screen plate; 27, first auxiliary block; 28, second auxiliary block; 29, third screen hole; 30, installation shell; 31, second motor; 32, linking bottom plate; 33, third electrically installed telescopic rod; 34, installation groove; 35, limiting block; 36, limiting rod; 37, bearing plate; 38, second cleaning brush. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0036] Please refer to Figures 1-9The application provides a technical scheme: a powder rapid dust-free feeding station, which comprises a first connecting support 1, an inlet shell 2, a dust collector 3, a dust suction pump 4, a connecting line 5, a control mechanism 6, a shell cover 7, a first electrically installed telescopic rod 8, an inlet 9, a screening hopper 10, a second connecting support 11, a telescopic spring 12, a linking plate 13, a vibrator 14, a first motor 15, a linking disc 16, a linking groove 17, a first cleaning brush 18, a second electrically installed telescopic rod 19, a first screen sleeve 20, a first screen hole 21, a positioning block 22, a second screen sleeve 23, a second screen hole 24, a first screen plate 25, a second screen plate 26, a first auxiliary block 27, a second auxiliary block 28, a third screen hole 29, a mounting shell 30, a second motor 31, a linking bottom plate 32, a third electrically installed telescopic rod 33, a mounting groove 34, a limiting block 35, a limiting rod 36, a bearing plate 37 and a second cleaning brush 38.

[0037] When the powder rapid dust-free feeding station is used, first, as shown in Figure 1 and Figure 2 , because the first connecting support 1 is provided with the inlet shell 2, the upper end of the inlet shell 2 is provided with the dust collector 3 in communication, the upper end of the dust collector 3 is connected with the dust suction pump 4, and the dust suction pump 4 is connected with the control mechanism 6 outside the inlet shell 2 through the connecting line 5 thereon, by starting the control mechanism 6, the dust collector 3 is opened, the first connecting support 1 is internally provided with the inlet 9, the powder is put into the inside of the inlet shell 2 through the inlet 9, when being put in, the outer end of the inlet shell 2 is rotationally connected with the shell cover 7, and the outer end of the shell cover 7 is rotationally connected with the first electrically installed telescopic rod 8, by starting the first electrically installed telescopic rod 8, the outer end of the first electrically installed telescopic rod 8 is rotated at the outer end of the shell cover 7 and the inlet shell 2, and the shell cover 7 is rotated at the outer end of the inlet shell 2, so that the outer end of the inlet shell 2 is closed by the shell cover 7, to prevent the powder dust from being discharged from the inlet 9 after the powder is sent into the inside of the inlet shell 2, to affect the environment, after the powder is put into the inside of the inlet shell 2, the control mechanism 6 is started, when the control mechanism 6 is started, the dust suction pump 4 is started by the control mechanism 6, the dust in the inlet shell 2 is sucked and discharged by the dust collector 3, so that the whole work is in a dust-free state.

[0038] Specifically, as shown in Figure 3 , Figure 4 and Figure 7The bottom of the first connecting support 1 is provided with a screening hopper 10 communicated with the feeding shell 2. When the dust is poured into the feeding shell 2, the dust enters the inside of the screening hopper 10 through the feeding shell 2. The inside of the screening hopper 10 is respectively provided with a first screen sleeve 20 and a second screen sleeve 23. The inside of the first screen sleeve 20 is provided with a first screen hole 21. The inside of the second screen sleeve 23 is provided with a second screen hole 24. The first screen sleeve 20 and the second screen sleeve 23 are respectively provided with adjustable connecting assemblies at the bottom. The connecting assembly comprises a first screen plate 25 arranged at the bottom of the first screen sleeve 20. The bottom of the second screen sleeve 23 is provided with a second screen plate 26. The upper end of the first screen plate 25 is symmetrically provided with a first auxiliary block 27. The upper end of the second screen plate 26 is symmetrically connected with a second auxiliary block 28. The inside of the first screen plate 25 and the second screen plate 26 is uniformly provided with a third screen hole 29. The first screen plate 25 and the second screen plate 26 are connected with the first screen sleeve 20. The shaft of the second screen plate 26 is provided with a mounting shell 30. The inside of the mounting shell 30 is mounted with a second motor 31. The first screen plate 25 is driven to rotate by the second motor 31. When the first screen plate 25 rotates, the first screen sleeve 20 is connected with the first screen plate 25 through the first auxiliary block 27. The first screen plate 25 drives the first auxiliary block 27 to rotate the first screen sleeve 20. The first screen hole 21 and the second screen hole 24 are uniformly arranged on the outer surface of the first screen sleeve 20 and the second screen sleeve 23 at equal angles. The outer surface of the first screen sleeve 20 is arranged in close contact with the inner wall of the second screen sleeve 23. The holes of the first screen hole 21 and the second screen hole 24 are staggered. The size of the screen hole is adjusted by the coincident holes of the first screen hole 21 and the second screen hole 24. The structure is ingenious, the operation is simple, and the screening efficiency is improved.

[0039] The outer side of the screening hopper 10 is provided with a second connecting bracket 11, the outer surface of the screening hopper 10 is provided with an adapter plate 13, and the outer end of the adapter plate 13 is fixed with a vibrator 14 by bolts, the adapter plate 13 is connected with the second connecting bracket 11 through the extension spring 12 at the lower end thereof, and the vibrator 14 is started, at this time the extension spring 12 is extended and retracted, so that the adapter plate 13 shakes and screens the screening hopper 10, and at the same time of screening, the outer end of the screening hopper 10 is provided with a first motor 15, the output end of the first motor 15 is connected with an adapter disc 16, the outer side of the adapter disc 16 is provided with a limiting block 35 connected to the outer surface of the second screen sleeve 23, and the first motor 15 is started at the same time of screening, so as to drive the adapter disc 16 at the output end of the first motor 15 to rotate, when the adapter disc 16 rotates, the limiting block 35 is connected to the adapter disc 16 in a meshing manner, so as to drive the second screen sleeve 23 to rotate, the bottom of the second screen sleeve 23 is fixed with a mounting shell 30 by bolts, so that the second screen sleeve 23 drives the first screen sleeve 20 to rotate under the rotation of the second screen sleeve 23, the powder in the first screen sleeve 20 is screened and rotated to be discharged to the outside of the first screen hole 21 through the screen holes in the first screen hole 21 and the second screen hole 24, and at the same time of rotation of the second screen sleeve 23, the outer end of the second screen sleeve 23 is provided with a limiting rod 36, the limiting rod 36 is symmetrically arranged at the outer end of the second screen sleeve 23, and the limiting rod 36 is slidably connected with the screening hopper 10 through the adapter groove 17 at the outer side thereof, when the second screen sleeve 23 rotates, the limiting rod 36 slides in the adapter groove 17, so as to stably move the second screen sleeve 23, and the bottom of the second screen sleeve 23 is in abutment with the adapter bottom plate 32, and the lower surface of the second screen plate 26 is in abutment with the upper surface of the adapter bottom plate 32, so as to support the rotation of the second screen sleeve 23, and the adapter bottom plate 32 is provided with a hole structure at equal angles, the powder in the screening hole is discharged from the groove of the adapter bottom plate 32 to the bottom of the screening hopper 10, and the rotation of the first screen sleeve 20 and the second screen sleeve 23 can screen powder with different particles.

[0040] Specifically as Figure 5 、 Figure 6 、 Figure 8 and Figure 9The outer end of the top of the first screen sleeve 20 is connected with a positioning block 22, the second motor 31 is connected with the first screen sleeve 20 through an output end to play a role in adjusting the gap, when the second motor 31 is started, the first screen sleeve 20 is driven to rotate, at the same time, the positioning block 22 slides at the outer end of the second screen sleeve 23, and the first screen sleeve 20 is connected with the second screen sleeve 23 through the positioning block 22, the inside of the screening hopper 10 is provided with a mounting groove 34, and the inside of the mounting groove 34 is provided with a third electric mounting telescopic rod 33, the upper end of the third electric mounting telescopic rod 33 is provided with a connecting bottom plate 32, after the powder is screened, the powder not discharged from the inside of the first screen hole 21 and the second screen hole 24 is in the inside of the first screen sleeve 20 and the surface of the first screen plate 25, and the third electric mounting telescopic rod 33 is started, at this time, the third electric mounting telescopic rod 33 slides the connecting bottom plate 32 in the inside of the mounting groove 34, and the second screen sleeve 23 supports the first screen sleeve 20 through the positioning block 22;

[0041] Under the action of gravity, the second screen sleeve 23 is relatively clamped with the second screen plate 26 through the second auxiliary block 28, the connecting bottom plate 32 drives the first screen plate 25 and the second screen plate 26 to separate, so that the first auxiliary block 27 and the second auxiliary block 28 are separated from the first screen sleeve 20 and the second screen sleeve 23 respectively, the inner wall of the screening hopper 10 is provided with the second electric mounting telescopic rod 19, and the outer side of the second electric mounting telescopic rod 19 is connected with the first cleaning brush 18, the first cleaning brush 18 is moved by starting the second electric mounting telescopic rod 19, so that the first cleaning brush 18 is attached to the outer surface of the second screen sleeve 23, under the rotation of the connecting disc 16, the second screen sleeve 23 is driven to rotate, so that the powder in the first screen hole 21 and the second screen hole 24 is wiped and cleaned, to prevent the hole from being blocked, the inside of the first screen sleeve 20 is provided with a bearing plate 37, and the bearing plate 37 is connected with the second cleaning brush 38 through an electric telescopic rod, and under the action of the electric telescopic rod, the electric telescopic rod drives the second cleaning brush 38 to move downward, so that the second cleaning brush 38 is attached to the surface of the first screen plate 25, the remaining large particle powder on the surface of the first screen plate 25 is rotated and concentrated under the rotation of the second screen sleeve 23, and is discharged from the bottom of the screening hopper 10, which is convenient for simultaneous cleaning, convenient operation, reduces manual operation time, and improves the automation level, which is the use method of the powder rapid dust-free feeding station.

[0042] The standard parts used in the present application can be purchased from the market, and the special-shaped parts can be ordered according to the description and the drawings, the specific connection mode of each part adopts the conventional means such as bolt, rivet and welding in the prior art, the machinery, parts and equipment adopt the conventional type in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, which will not be described in detail here. The contents not described in detail in the specification belong to the prior art known to those skilled in the art.

[0043] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacements for part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A fast dust-free powder dosing station, comprising: First connecting support (1), and the setting is in first connecting support (1) on the material inlet shell (2), the upper end of material inlet shell (2) is connected with dust catcher (3), and the upper end of dust catcher (3) is connected with dust pump (4), and dust pump (4) is connected with control mechanism (6) outside material inlet shell (2) through the connecting line (5) on it; It is characterized by further comprising: The bottom of first connecting support (1) is provided with sieve hopper (10) communicated with material inlet shell (2), and the outside of sieve hopper (10) is provided with second connecting support (11), the outer surface of sieve hopper (10) is provided with adapter plate (13), and the outer end of adapter plate (13) is fixed with vibrator (14) through bolt, the inside of sieve hopper (10) is provided with first screen sleeve (20) and second screen sleeve (23) in superposition, the inside of first screen sleeve (20) and second screen sleeve (23) is provided with first screen hole (21) and second screen hole (24) respectively, wherein first screen sleeve (20) and second screen sleeve (23) are relatively rotated by the adapter assembly arranged at the bottom to adjust the overlapping range of first screen hole (21) and second screen hole (24); The adapter assembly comprises first screen plate (25) arranged at the bottom of first screen sleeve (20), second screen plate (26) arranged at the bottom of second screen sleeve (23), and first auxiliary block (27) symmetrically arranged at the upper end of first screen plate (25), second auxiliary block (28) symmetrically connected to the upper end of second screen plate (26), third screen hole (29) uniformly arranged in the inside of first screen plate (25) and second screen plate (26), mounting housing (30) arranged at the shaft center of second screen plate (26), and second motor (31) mounted in the inside of mounting housing (30), first screen sleeve (20) connected to first screen plate (25) by clamping through first auxiliary block (27); Second motor (31) is connected to first screen sleeve (20) through output end to play the role of adjusting gap, mounting groove (34) is arranged in the inside of sieve hopper (10), and third electric mounting telescopic rod (33) is arranged in the inside of mounting groove (34), and adapter bottom plate (32) is mounted at the upper end of third electric mounting telescopic rod (33); Second screen sleeve (23) is relatively clamped to second screen plate (26) through second auxiliary block (28), the lower surface of second screen plate (26) is arranged in abutment with the upper surface of adapter bottom plate (32), and the inside of adapter bottom plate (32) is provided with hole structure at equal angles, adapter plate (13) is connected to second connecting support (11) through telescopic spring (12) at the lower end of adapter plate (13), and the outer end of material inlet shell (2) is rotatably connected with shell cover (7), and the outer end of shell cover (7) is rotatably connected with first electric mounting telescopic rod (8).

2. A quick dust-free powder feeding station according to claim 1, characterized in that: The outer end of the screening hopper (10) is provided with a first motor (15), and the output end of the first motor (15) is connected with a connecting disc (16), and the outer side of the connecting disc (16) is provided with a limiting block (35) connected to the outer surface of the second screen sleeve (23).

3. A quick dust-free powder feeding station according to claim 2, characterized in that: The limiting block (35) is connected with the connecting disc (16) in an engaged manner.

4. A quick dust-free powder feeding station according to claim 1, characterized in that: The first screen holes (21) and the second screen holes (24) are evenly arranged on the outer surfaces of the first screen sleeve (20) and the second screen sleeve (23) at equal angles, respectively, and the outer surface of the first screen sleeve (20) is attached to the inner wall of the second screen sleeve (23), and the first screen sleeve (20) is connected with the second screen sleeve (23) in a clamped manner through the positioning block (22). The outer end of the first screen sleeve (20) is connected with the positioning block (22), and the outer end of the second screen sleeve (23) is provided with a limiting rod (36).

5. A quick dust-free powder feeding station according to claim 1, characterized in that: The inner wall of the screening hopper (10) is provided with a second electrically-operated mounting telescopic rod (19), and the outer side of the second electrically-operated mounting telescopic rod (19) is connected with a first cleaning brush (18), the inner side of the first screen sleeve (20) is provided with a bearing plate (37), and the bearing plate (37) is connected with a second cleaning brush (38) through an electric telescopic rod.

6. A quick dust-free powder feeding station according to claim 4, characterized in that: The limiting rod (36) is symmetrically arranged at the outer end of the second screen sleeve (23), and the limiting rod (36) is connected with the screening hopper (10) in a sliding manner through the connecting groove (17) on the outer side of the limiting rod (36).

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