Cloth bag dust removal device for sand blasting and polishing of large butterfly valve
By designing a large butterfly valve bag filter dust collector for sandblasting and polishing, the problem of mixing sandblasting materials and dust is solved by using baffles and cylinder piston rods to separate dust and raw materials, thus realizing the reuse of raw materials.
Patent Information
- Application Number
- CN202511803965.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-03
- Publication Date
- 2026-01-23
AI Technical Summary
After existing butterfly valves are sandblasted and polished, the sandblasting material mixes with dust and enters the bag filter, making the material unusable.
A large-scale bag filter dust collector for sandblasting and polishing of butterfly valves was designed. Through the cooperation of baffles, cylinders and piston rods, dust and raw materials are separated. The dust is lifted by gas blowing and sucked into the dust collection chamber, while the raw materials fall back to the bottom of the processing chamber under the action of gravity, realizing the reuse of raw materials.
It effectively separates dust and raw materials, enabling the reuse of sandblasting materials and improving resource utilization.
Smart Images
Figure CN121374435A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of cloth bag dust removal, in particular to a cloth bag dust removal device for large butterfly valve sand blasting and polishing. BACKGROUND
[0002] Sand blasting and polishing is a process of surface treatment by high-speed impact of abrasive particles on the surface of the workpiece. The core principle is to use the kinetic energy of the abrasive to remove impurities, scale and burrs on the surface of the workpiece, while forming a uniform rough or smooth surface texture, with the dual functions of "cleaning" and "modification".
[0003] In the prior art, patent No. CN110075626B, named cloth bag dust collector, relates to the technical field of dust removal, which solves the problem of uneven air intake in the prior art. The technical solution is as follows: a box body and a plurality of cloth bags arranged in the box body, a partition plate fixedly connected to the inner wall of the box body, an air inlet pipe arranged on one side of the box body, a fan fixedly connected to the air inlet pipe, two first shunt pipes fixedly connected to the air inlet pipe, a first connecting pipe fixedly connected to the first shunt pipe, two second shunt pipes fixedly connected to the two sides of the first connecting pipe, and a second connecting pipe fixedly connected to the second shunt pipe. The box body is divided into four chambers by three partition plates, and the air inlet pipe sends the air containing dust into the first shunt pipes on both sides.
[0004] However, the existing butterfly valve sand blasting and polishing is removed by the cloth bag dust collector, and since the air contains the raw materials for sand blasting, the raw materials and dust are mixed into the dust collector, and the raw materials for sand blasting cannot be reused. SUMMARY
[0005] The present application aims to provide a cloth bag dust removal device for large butterfly valve sand blasting and polishing to solve the problems raised in the background art.
[0006] To achieve the above-mentioned purpose, the present application provides the following technical solution: a cloth bag dust removal device for large butterfly valve sand blasting and polishing, comprising: The bottom of the supporting bracket is provided with a connecting pipe, the end of the connecting pipe is fixed with a dust removal bin, the bottom of the dust removal bin is fixed with a supporting rod, the inside of the supporting bracket is provided with a stand, the top of the stand is provided with a first sealing ring and a baffle, the inside of the stand is provided with an L-shaped rod, the end of the L-shaped rod is fixed with a connecting rod, the surface of the connecting rod is fixed with a ring plate, the bottom of the supporting bracket is fixed with an extension ring, the surface of the extension ring is fixed with a butt joint pipe, the bottom of the extension ring is fixed with a lower extension ring, and the bottom of the lower extension ring is connected to the end of the connecting pipe.
[0007] Preferably, the inside of the support frame is provided with an inner groove, the top of the inner groove is fixedly provided with a partition plate, the surface of the partition plate is provided with a discharging hole, the top of the support frame is connected with a spraying and polishing device, the surface of the support frame is fixedly provided with an extension plate, the inside of the extension plate is provided with a driving device, the bottom of the partition plate is provided with a turnover plate, the turnover plate is provided in multiple groups, the surface of the turnover plate is fixedly provided with a rotating shaft, one end of the rotating shaft is inserted into the baffle, the driving device in the baffle drives the rotating shaft to rotate, the turnover plate rotates with the rotating shaft, the bottom of the partition plate is provided with a treatment bin, and the turnover plate and the rotating shaft are located in the treatment bin.
[0008] Preferably, the bottom of the partition plate is fixedly provided with a conical cylinder, the conical cylinder is fixedly provided in multiple groups, the bottom of the conical cylinder is provided with a butt joint hole, the butt joint hole is communicated with the discharging hole, the bottom of the downward extending ring is provided with a discharging groove, the discharging groove is fixedly provided with multiple second horizontal rods, the end of the second horizontal rod is fixedly provided with a stand, and the stand is located in the discharging groove and connected with the end of the connecting pipe.
[0009] Preferably, the top of the stand is fixedly provided with multiple vertical rods, the top of the vertical rod is fixedly provided with a baffle, the inside of the stand is provided with a through groove, the through groove is provided with a first air cylinder, the surface of the first air cylinder is fixedly provided with a first horizontal rod, the other end of the first horizontal rod is fixedly connected to the inner wall of the through groove, so that the first air cylinder is fixedly connected to the through groove, the top of the first air cylinder is provided with a first piston rod, the first air cylinder can drive the first piston rod to move up and down, the top of the first piston rod is fixedly provided with an L-shaped rod, and the L-shaped rod moves with the first piston rod.
[0010] Preferably, the other end of the L-shaped rod is fixedly provided with a connecting rod, the connecting rod moves up and down with the L-shaped rod, the surface of the connecting rod is fixedly provided with a ring plate, the ring plate is provided in multiple groups, the ring plate moves up and down with the connecting rod, and the ring plate and the connecting rod are located in the treatment bin and move up and down in the treatment bin.
[0011] Preferably, the inside of the downward extending ring is provided with a storage interval, the storage interval is communicated with the treatment bin, the bottom of the downward extending ring is fixedly provided with a second air cylinder, the end of the second air cylinder is provided with a second piston rod, the second air cylinder can drive the second piston rod to move up and down, the second piston rod is located in the storage interval, the end of the second piston rod is fixedly provided with a second sealing ring, the second sealing ring moves up and down with the second piston rod, and the second sealing ring is supported in the discharging groove after rising.
[0012] Preferably, the surface of the downward extending ring is provided with a material taking hole, the material taking hole communicates the storage interval with the outside, the raw material in the treatment bin can enter the storage interval through the discharging groove, and the raw material in the storage interval can be taken out through the material taking hole.
[0013] Preferably, the dust removal bin can suck the air and dust in the treatment bin into the inside of the dust removal bin through the connecting pipe, the dust removal bin is provided with a dust removal cloth bag, and the air is dedusted through the dust removal cloth bag.
[0014] Preferably, one end of the docking pipe is communicated with the processing bin, the other end of the docking pipe is connected with the blowing device, the blowing device blows air into the processing bin through the docking pipe, and the dust and raw materials at the bottom of the processing bin are lifted up during the rising of the ring plate and the connecting rod, the air blown through the docking pipe is blown on the surface of the dust and raw materials, so that the dust is mixed in the air, and the raw materials are heavier than the dust, and the raw materials fall to the bottom of the processing bin under the action of gravity.
[0015] Preferably, the top of the first sealing ring is provided with a rubber ring, and the top of the first sealing ring is supported at the bottom of the baffle during the rising of the first piston rod, so that the rubber ring at the top of the first sealing ring is supported at the bottom of the baffle, and the gap between the baffle and the column is sealed by the first sealing ring.
[0016] Compared with the prior art, the beneficial effects of the present application are: The baffle prevents the raw materials from directly falling into the interior of the column, the first piston rod drives the L-shaped rod and the first sealing ring to rise by the driving of the first cylinder, the first sealing ring blocks between the baffle and the column after rising, and the ring plate is lifted up by the connecting rod driven by the L-shaped rod, the dust and raw materials at the bottom of the processing bin are lifted up after the ring plate rises, and the docking pipe is connected with the blowing device, the gas enters the processing bin through the docking pipe, the gas is blown between the dust and raw materials, the dust is lifted in the air, and the raw materials are heavier and fall to the bottom of the processing bin, so that the dust and the raw materials are separated, and the raw materials are recycled. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is a structural schematic view of the present application.
[0018] Figure 2 It is another perspective structural schematic view of the present application.
[0019] Figure 3 It is a structural schematic view of the present application.
[0020] Figure 4 It is another perspective structural schematic view of the present application.
[0021] Figure 5 It is a structural schematic view of the present application.
[0022] Figure 6 It is a structural schematic view of the present application.
[0023] Figure 7 It is another perspective structural schematic view of the present application.
[0024] Figure 8 As Figure 5 The structure amplification schematic view at A in the figure.
[0025] Figure 9 As Figure 6 The structure amplification schematic view at B in the figure.
[0026] Figure 10 As Figure 7 The structure amplification schematic view at C in the figure.
[0027] In the figure: support frame 1, connecting pipe 2, dust removal bin 3, support rod 4, extension ring 5, blanking hole 6, inner groove 7, partition plate 8, extension plate 9, lower extension ring 10, butt joint pipe 11, processing bin 12, ring plate 13, connecting rod 14, conical cylinder 15, butt joint hole 16, turnover plate 17, rotating shaft 18, baffle 19, stand column 20, first sealing ring 21, L-shaped rod 22, vertical rod 23, first piston rod 24, through groove 25, first air cylinder 26, material taking hole 27, second piston rod 28, second air cylinder 29, first cross rod 30, second sealing ring 31, second cross rod 32, storage room 33, blanking groove 34. DETAILED DESCRIPTION
[0028] In order to make the purpose, technical scheme of the present application clear, complete and the advantages more clear and obvious, the following will be further described in detail by combining with the drawings. It should be understood that the specific embodiments described here are part of the embodiments of the present application, not all the embodiments, only to explain the embodiments of the present application, and not for limiting the embodiments of the present application, all other embodiments obtained by the ordinary skilled in the art without doing creative work, belong to the scope of protection of the present application.
[0029] Please refer to Figures 1 to 10 , the present application provides a kind of technical scheme: Embodiment 1: a cloth bag dust removal device for sand blasting and polishing of large butterfly valves, comprising: a support frame 1, the bottom of the support frame 1 is provided with a connecting pipe 2, the end of the connecting pipe 2 is fixedly provided with a dust removal bin 3, the bottom of the dust removal bin 3 is fixedly provided with a supporting rod 4, the inside of the support frame 1 is provided with a stand 20, the top of the stand 20 is provided with a first sealing ring 21 and a baffle 19, the inside of the stand 20 is provided with an L-shaped rod 22, the end of the L-shaped rod 22 is fixedly provided with a connecting rod 14, the surface of the connecting rod 14 is fixedly provided with a ring plate 13, the bottom of the support frame 1 is fixedly provided with an extension ring 5, the surface of the extension ring 5 is fixedly provided with a butt joint pipe 11, the bottom of the extension ring 5 is fixedly provided with a lower extension ring 10, the bottom of the lower extension ring 10 is connected with the end of the connecting pipe 2, the dust removal bin 3 can suck the air and dust in the treatment bin 12 into the inside of the dust removal bin 3 through the connecting pipe 2, the dust removal bin 3 is provided with a dust removal cloth bag, the air is dusted through the dust removal cloth bag, the butt joint pipe 11 is connected with a gas blowing equipment, the gas enters the treatment bin 12 through the butt joint pipe 11, the gas blows between the dust and the raw material, the dust is blown in the air, due to the weight of the raw material is larger, the raw material will fall on the bottom of the treatment bin 12 faster.
[0030] The embodiment 2 is based on the embodiment 1, the inner part of the support frame 1 is provided with an inner groove 7, the top of the inner groove 7 is fixed with a partition plate 8, the surface of the partition plate 8 is provided with a discharging hole 6, the top of the support frame 1 is connected with a spraying polishing device, the surface of the support frame 1 is fixed with an extension plate 9, the inner part of the extension plate 9 is provided with a driving device, the bottom of the partition plate 8 is provided with a plurality of overturning plates 17, the surface of the overturning plate 17 is fixed with a rotating shaft 18, one end of the rotating shaft 18 is inserted into the baffle 19, the driving device in the baffle 19 drives the rotating shaft 18 to rotate, the overturning plate 17 rotates with the rotating shaft 18, the bottom of the partition plate 8 is provided with a treatment bin 12, the overturning plate 17 and the rotating shaft 18 are located in the treatment bin 12, one end of the connecting pipe 11 communicates with the treatment bin 12, the other end of the connecting pipe 11 is connected with a blowing device, the blowing device blows air into the treatment bin 12 through the connecting pipe 11, and the air blown out of the connecting pipe 11 blows on the surface of the dust and the raw material in the treatment bin 12, so that the dust is mixed in the air and is sucked into the connecting pipe 2 and the dust removal bin 3 with the through groove 25, the weight of the raw material is greater than the weight of the dust, under the action of gravity, the raw material falls to the bottom of the treatment bin 12, the top of the first sealing ring 21 is provided with a rubber ring, the top of the first sealing ring 21 abuts against the bottom of the baffle 19 during the rising process of the first piston rod 24, so that the rubber ring at the top of the first sealing ring 21 abuts against the bottom of the baffle 19, the gap between the baffle 19 and the stand column 20 is sealed by the first sealing ring 21, the first piston rod 24 is driven to descend by the first cylinder 26, so that the first sealing ring 21 descends, the dust and the air enter the inner part of the stand column 20 and are sucked into the dust removal bin 3 through the connecting pipe 2 for dust removal, the remaining raw material is located at the bottom of the treatment bin 12, the second piston rod 28 is driven to descend by the second cylinder 29, so that the second sealing ring 31 descends and the raw material at the bottom of the treatment bin 12 enters the storage room 33. The bottom of the partition plate 8 is fixed with a plurality of groups of conical cylinders 15, the bottom of the conical cylinder 15 is provided with a butt joint hole 16, the butt joint hole 16 is communicated with the blanking hole 6, the bottom of the downward ring 10 is provided with a blanking groove 34, a plurality of groups of second horizontal rods 32 are fixed in the blanking groove 34, the end of the second horizontal rod 32 is fixed with a stand column 20, the stand column 20 is located in the blanking groove 34, and the bottom of the stand column 20 is connected with the end of the connecting pipe 2, the inside of the downward ring 10 is provided with a storage interval 33, the storage interval 33 is communicated with the processing bin 12, the bottom of the downward ring 10 is fixed with a second cylinder 29, the end of the second cylinder 29 is provided with a second piston rod 28, the second cylinder 29 can drive the second piston rod 28 to move up and down, the second piston rod 28 is located in the storage interval 33, the end of the second piston rod 28 is fixed with a second sealing ring 31, the second sealing ring 31 moves up and down with the second piston rod 28, the second sealing ring 31 is supported in the blanking groove 34 after rising, the surface of the downward ring 10 is provided with a material taking hole 27, the material taking hole 27 makes the storage interval 33 communicated with the outside, the raw materials in the processing bin 12 can enter the storage interval 33 through the blanking groove 34, the raw materials in the storage interval 33 can be taken out through the material taking hole 27, the remaining raw materials are located at the bottom of the processing bin 12, the second piston rod 28 is driven to descend by the second cylinder 29, the second piston rod 28 drives the second sealing ring 31 to descend, so that the raw materials at the bottom of the processing bin 12 enter the storage interval 33, and the raw materials in the storage interval 33 can be taken out through the material taking hole 27.
[0031] The top of the stand column 20 is fixed with a plurality of groups of vertical rods 23, the top of the vertical rod 23 is fixed with a baffle plate 19, the inside of the stand column 20 is provided with a through groove 25, the through groove 25 is provided with a first cylinder 26, the surface of the first cylinder 26 is fixed with a first horizontal rod 30, the other end of the first horizontal rod 30 is fixed on the inner wall of the through groove 25, so that the first cylinder 26 is fixed in the through groove 25, the top of the first cylinder 26 is provided with a first piston rod 24, the first cylinder 26 can drive the first piston rod 24 to move up and down, the top of the first piston rod 24 is fixed with an L-shaped rod 22, the L-shaped rod 22 moves with the first piston rod 24, the other end of the L-shaped rod 22 is fixed with a connecting rod 14, the connecting rod 14 moves up and down with the L-shaped rod 22, the surface of the connecting rod 14 is fixed with a ring plate 13, the ring plate 13 is provided with a plurality of groups, the ring plate 13 moves up and down with the connecting rod 14, the ring plate 13 and the connecting rod 14 are located in the processing bin 12, and the ring plate 13 and the connecting rod 14 move up and down in the processing bin 12, the first sealing ring 21 is blocked between the baffle plate 19 and the stand column 20 after rising, and the L-shaped rod 22 drives the ring plate 13 to rise through the connecting rod 14, the ring plate 13 rises to stir up the dust and raw materials at the bottom of the processing bin 12, and the butt joint pipe 11 is connected with the air blowing equipment, the gas enters the processing bin 12 through the butt joint pipe 11, and the gas is blown between the dust and the raw materials to stir up the dust in the air.
[0032] The sandblasted raw material and air and dust enter the feeding hole 6, pass through the butt joint hole 16 in the inside of the conical cylinder 15, enter the processing bin 12, the end of the rotating shaft 18 is connected with the driving device, the driving device drives the rotating shaft 18 to rotate, the end of the plurality of sets of turnover plates 17 is supported together, the top of the processing bin 12 is isolated, the turnover plate 17 is rotated to make the dust and raw material on the surface of the turnover plate 17 fall to the bottom of the processing bin 12, the top of the stand column 20 is provided with the baffle 19, the baffle 19 prevents the raw material from directly falling into the inside of the stand column 20, the first piston rod 24 is driven to rise by the first cylinder 26, the first piston rod 24 drives the L-shaped rod 22 and the first sealing ring 21 to rise, the first sealing ring 21 is blocked between the baffle 19 and the stand column 20 after rising, and the L-shaped rod 22 drives the ring plate 13 to rise through the connecting rod 14, the ring plate 13 rises to stir up the dust and raw material at the bottom of the processing bin 12, and the butt joint pipe 11 is connected with the blowing device, the gas enters the processing bin 12 through the butt joint pipe 11, the gas is blown between the dust and the raw material, the dust is stirred in the air, because the raw material is heavy, it will fall to the bottom of the processing bin 12 faster, the first piston rod 24 is driven to descend by the first cylinder 26, so that the first sealing ring 21 descends, the dust and air enter the inside of the stand column 20, and are sucked into the dust removal bin 3 through the connecting pipe 2, dust removal is carried out, the remaining raw material is at the bottom of the processing bin 12, the second piston rod 28 is driven to descend by the second cylinder 29, the second piston rod 28 drives the second sealing ring 31 to descend, so that the raw material at the bottom of the processing bin 12 enters the storage room 33, and the raw material in the storage room 33 can be taken out through the taking hole 27.
[0033] Although the foregoing describes the specific embodiments of the present application in detail, so that those skilled in the art can understand the present application, the present application is not limited to the scope of the specific embodiments, and for those skilled in the art, all application creations utilizing the concept of the present application are within the scope of the present application, as long as various changes are within the spirit and scope of the present application defined and determined by the appended claims.
Claims
1. A bag filter dust collector for sandblasting and polishing large butterfly valves, characterized in that: Include: The bottom of the support frame (1) is provided with a connecting pipe (2), the end of the connecting pipe (2) is fixed with a dust removal bin (3), the bottom of the dust removal bin (3) is fixed with a support rod (4), the inside of the support frame (1) is provided with a stand (20), the top of the stand (20) is provided with a first sealing ring (21) and a baffle (19), the inside of the stand (20) is provided with an L-shaped rod (22), the end of the L-shaped rod (22) is fixed with a connecting rod (14), the surface of the connecting rod (14) is fixed with a ring plate (13), the bottom of the support frame (1) is fixed with an extension ring (5), the surface of the extension ring (5) is fixed with a butt joint pipe (11), the bottom of the extension ring (5) is fixed with a lower extension ring (10), the bottom of the lower extension ring (10) is connected with the end of the connecting pipe (2).
2. The cloth bag dust collector for sand blasting and polishing of large butterfly valves according to claim 1, characterized in that: The inside of the support frame (1) is provided with an inner groove (7), the top of the inner groove (7) is fixed with a partition plate (8), the surface of the partition plate (8) is provided with a discharging hole (6), the top of the support frame (1) is connected with a spraying polishing equipment, the surface of the support frame (1) is fixed with an extension plate (9), the inside of the extension plate (9) is provided with a driving device, the bottom of the partition plate (8) is provided with a turnover plate (17), the turnover plate (17) is provided with a plurality of groups, the surface of the turnover plate (17) is fixed with a rotating shaft (18), one end of the rotating shaft (18) is inserted into the baffle (19), the driving device in the baffle (19) drives the rotating shaft (18) to rotate, the turnover plate (17) rotates with the rotating shaft (18), the bottom of the partition plate (8) is provided with a treatment bin (12), the turnover plate (17) and the rotating shaft (18) are located in the treatment bin (12).
3. The cloth bag dust collector for sand blasting and polishing of large butterfly valves according to claim 2, characterized in that: The bottom of the partition plate (8) is fixed with a conical cylinder (15), the conical cylinder (15) is fixed with a plurality of groups, the bottom of the conical cylinder (15) is provided with a butt joint hole (16), the butt joint hole (16) is communicated with the discharging hole (6), the bottom of the lower extension ring (10) is provided with a blanking groove (34), a plurality of second cross rods (32) are fixed in the blanking groove (34), the end of the second cross rod (32) is fixed with a stand (20), the stand (20) is located in the blanking groove (34), and the bottom of the stand (20) is connected with the end of the connecting pipe (2).
4. The cloth bag dust collector for sand blasting and polishing of large butterfly valves according to claim 3, characterized in that: The top of the stand (20) is fixed with a plurality of vertical rods (23), the top of the vertical rod (23) is fixed with a baffle (19), the inside of the stand (20) is provided with a through groove (25), the first cylinder (26) is arranged in the through groove (25), the surface of the first cylinder (26) is fixed with a first cross rod (30), the other end of the first cross rod (30) is fixed to the inner wall of the through groove (25), so that the first cylinder (26) is fixed in the through groove (25), the top of the first cylinder (26) is provided with a first piston rod (24), the first cylinder (26) can drive the first piston rod (24) to move up and down, the top of the first piston rod (24) is fixed with an L-shaped rod (22), the L-shaped rod (22) moves with the first piston rod (24).
5. The cloth bag dust collector for sand blasting and polishing of large butterfly valves according to claim 4, characterized in that: The other end of the L-shaped rod (22) is fixed with a connecting rod (14), the connecting rod (14) moves up and down with the L-shaped rod (22), the surface of the connecting rod (14) is fixed with a plurality of ring plates (13), the ring plates (13) move up and down with the connecting rod (14), the ring plates (13) and the connecting rod (14) are located in the processing bin (12), and the ring plates (13) and the connecting rod (14) move up and down in the processing bin (12).
6. The cloth bag dust collector for sand blasting and polishing of large butterfly valves according to claim 5, characterized in that: The inside of the downward ring (10) is provided with a storage interval (33), the storage interval (33) is communicated with the processing bin (12), the bottom of the downward ring (10) is fixedly connected with a second air cylinder (29), the end of the second air cylinder (29) is provided with a second piston rod (28), the second air cylinder (29) can drive the second piston rod (28) to move up and down, the second piston rod (28) is located in the storage interval (33), the end of the second piston rod (28) is fixedly connected with a second sealing ring (31), the second sealing ring (31) moves up and down with the second piston rod (28), and the second sealing ring (31) is supported in the dropping groove (34) after rising.
7. The cloth bag dust collector for sand blasting and polishing of large butterfly valves according to claim 6, characterized in that: The surface of the downward ring (10) is provided with a material taking hole (27), the material taking hole (27) communicates the storage interval (33) with the outside, the raw materials in the processing bin (12) can enter the storage interval (33) through the dropping groove (34), the raw materials in the storage interval (33) can be taken out through the material taking hole (27), the surface of the material taking hole (27) is provided with an opening and closing hatch, the raw materials can be taken out after the hatch is opened, and the storage interval (33) is in a sealed state when the hatch is closed.
8. The cloth bag dust collector for sand blasting and polishing of large butterfly valves according to claim 7, characterized in that: The dust removal bin (3) can suck the air and dust in the processing bin (12) into the inside of the dust removal bin (3) through the connecting pipe (2), the dust removal bin (3) is provided with a dust removal cloth bag, the air is dusted through the dust removal cloth bag, the dusted air is discharged from the air outlet pipe on the surface of the dust removal bin (3), and the dust can be taken out from the bottom of the dust removal bin (3).
9. The cloth bag dust collector for sand blasting and polishing of large butterfly valves according to claim 8, characterized in that: One end of the butt joint pipe (11) is communicated with the processing bin (12), the other end of the butt joint pipe (11) is connected with a blowing device, the blowing device blows the air into the processing bin (12) through the butt joint pipe (11), and the dust and raw materials in the processing bin (12) are blown up during the rising of the ring plates (13) and the connecting rod (14), the air blown out of the butt joint pipe (11) is blown on the surface of the dust and raw materials, so that the dust is mixed in the air, and the dust is sucked into the connecting pipe (2) and the dust removal bin (3) along with the through groove (25), the weight of the raw materials is greater than that of the dust, and the raw materials fall on the bottom of the processing bin (12) under the action of gravity.
10. The cloth bag dust collector for sand blasting and polishing of large butterfly valves according to claim 9, characterized in that: The top of the first sealing ring (21) is provided with a rubber ring, during the rising of the first sealing ring (21) along with the first piston rod (24), the top of the first sealing ring (21) is supported on the bottom of the baffle (19), so that the rubber ring on the top of the first sealing ring (21) is supported on the bottom of the baffle (19), and the gap between the baffle (19) and the stand column (20) is sealed through the first sealing ring (21).