Environment-friendly dust removal device for barite powder processing and crushing device

Abstract

The invention relates to the technical field of barite production equipment, in particular to an environment-friendly dust removal device for a barite powder processing and crushing device. The filter unit comprises two filter cavities distributed in the width direction of the shell, a filter screen is rotationally arranged in each filter cavity, the rotating axis of each filter screen is parallel to the vertical direction, an air inlet is formed in the connecting position of the shell and the crushing device, and an opening is formed in the side, facing the air inlet, of each filter cavity; a baffle is movably arranged at an opening of the filter cavity in the width direction of the shell, the size of the baffle is the same as that of the opening of the single filter cavity, a driving unit for driving the baffle to move in the width direction of the shell is arranged on the baffle, and an air exhaust unit for exhausting air in the filter cavity is arranged in the filter cavity; and air entering the filter cavity from the opening of the filter cavity passes through the filter screen and then is exhausted by the air exhaust unit. The service life of the filter screen is prolonged, and the dust removal efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of barite production equipment, and in particular to an environmentally friendly dust removal device for a barite powder processing and crushing device. Background Art

[0002] At present, the traditional grinding mill is mainly composed of a grinding barrel and a grinding device located in the grinding barrel. Large pieces of barite enter the grinding barrel through the feeding port and are ground into powder under the action of the grinding device, and then discharged from the discharge port. Although the above operation is convenient and fast, the surface of the block of barite placed in the grinding barrel is covered with dust. Although some grinding mills are equipped with dust removal devices, most of the barite is irregular in shape. The dust removal device only removes dust from a part of the barite, and the dust removal is incomplete and the dust removal effect is not good, resulting in dust still being attached to the barite, resulting in the ground barite powder containing dust, affecting the quality of the barite powder.

[0003] Chinese patent announcement number CN115283393B discloses an environmentally friendly dust removal device for a barite powder processing and crushing device, including a dust removal box, an exhaust device and a dust collecting box; the upper end of the dust removal box is provided with a feed port, the lower end of the dust removal box is provided with a discharge port, and the inner cavity of the dust removal box is provided with a crushing assembly, a guide plate, a first dust removal and conveying assembly and a second dust removal and conveying assembly from top to bottom in sequence; the crushing assembly is used to crush large pieces of barite blocks and remove dust thereon by extrusion force; the guide plate is tilted downward to convey the barite blocks to the feed end of the first dust removal and conveying assembly; the first dust removal and conveying assembly is used to convey the crushed barite blocks, and flip and clean the dust on the surface of the barite blocks; the second dust removal and conveying assembly is used to convey the barite blocks after being conveyed by the first dust removal and conveying assembly, and at the same time, remove the dust remaining on the surface of the barite blocks by vibration, and convey the barite blocks to the discharge port.

[0004] Although the above scheme realizes the collection and filtration of dust, in the process of barite powder being crushed, part of the barite powder will also be sucked into the dust removal device, and the content of barite powder is much greater than the amount of dust attached to the barite. The above scheme sets a nozzle on one side of the filter net, and the dust and barite powder attached to the filter net are cleaned by the nozzle. However, since the exhaust device is in a continuous operation state, dust and barite powder will be mixed with water and stick to the filter net, which makes the filtering effect of the filter net continue to decrease, and the volume in the dust collecting chamber is limited. The dust collecting chamber cannot discharge water in time, and dust and barite powder cannot be discharged in time, so the staff needs to clean the dust collecting chamber regularly. Summary of the invention

[0005] In view of the above problems, an environmentally friendly dust removal device for a barite powder processing and crushing device is provided, by setting two filter chambers in the shell along the width direction of the shell, and a rotatable filter screen is set in each filter chamber. During each filtration, the opening of one of the filter chambers is blocked by a baffle, so that only one filter chamber is in a filtering state at a time. When filtering, the opening of the filter chamber where the filter screen to be cleaned is located is first blocked by the baffle of the driving unit, and then the filter screen in the filter chamber will rotate 180 degrees with the continued operation of the driving unit. Finally, the switch valve is opened, and the air extraction unit can act on the filter screen that needs to be cleaned, that is, the outside air flows into the filter chamber through the switch valve, and the flowing air passes through the filter screen that needs to be cleaned and is discharged by the air extraction unit, so that the dust attached to the filter screen can be cleaned.

[0006] To solve the problems of the prior art, the present invention provides an environmentally friendly dust removal device for a barite powder processing and crushing device, comprising a shell interconnected with the crushing device, and a filter unit arranged in the shell; the filter unit comprises two filter chambers arranged along the width direction of the shell, a filter screen is rotatably arranged in each filter chamber, and the rotation axis of the filter screen is parallel to the vertical direction, the connection between the shell and the crushing device is an air inlet, an opening is provided on the side of the filter chamber facing the air inlet, a baffle is movably arranged at the opening of the filter chamber along the width direction of the shell, the size of the baffle is the same as the size of a single filter chamber opening, a driving unit for driving the baffle to move along the width direction of the shell is provided on the baffle, an exhaust unit for extracting air from the filter chamber is provided in the filter chamber, the air entering the filter chamber from the filter chamber opening passes through the filter screen and is discharged by the exhaust unit, the driving unit is started once every rated time, and the driving unit drives the baffle to move between the two filter chambers along the width direction of the shell, when the baffle moves, the baffle can only block one of the filter chamber openings at a time, and then the filter screen in the blocked filter chamber rotates 180 degrees.

[0007] Preferably, two extension plates are horizontally fixed on the baffle, and the two extension plates are respectively arranged on both sides of the baffle along the width direction of the shell, and a sliding block is arranged between the two extension plates so as to be movable along the width direction of the shell, and there are first and second gaps between the two sides of the sliding block and the two extension plates, respectively, and the distances between the first and second gaps are equal, and a spring is respectively arranged in the first gap and the second gap, and both ends of the spring are respectively fixedly connected to the sliding block and the extension plate.

[0008] Preferably, a transmission unit connected to the filter screen is provided on one side of the sliding block, and a first rack is provided on the side of the sliding block facing the transmission unit. The transmission unit can engage with the first rack, and when the baffle just covers the opening of the filter chamber under the drive of the driving unit, the transmission unit does not contact the sliding block.

[0009] Preferably, the transmission unit includes a first gear arranged on one side of the first rack and meshing with the first rack, a synchronous wheel is respectively arranged on the upper end of the first gear and the filter screen, a synchronous belt is sleeved on the outside of the two synchronous wheels, and the synchronous belt cooperates with the synchronous wheel for transmission.

[0010] Preferably, a switch valve is provided on the side wall of the filter chamber, and the switch valve is opened after the baffle blocks the opening of the filter chamber.

[0011] Preferably, a cleaning unit for cleaning the mesh surface of the filter is provided on the side of the filter away from the opening of the filter chamber, the cleaning unit includes a cleaning frame which moves along the width direction of the outer shell, a cleaning roller is vertically rotatably provided on the cleaning frame, a second threaded rod is rotatably provided in the filter chamber along the width direction of the outer shell, the second threaded rod passes through the cleaning frame and cooperates with the cleaning frame thread, and a second rotating driver for driving the second threaded rod to rotate is provided at the end of the second threaded rod.

[0012] Preferably, a second gear is provided at the end of the cleaning roller, and a second rack is fixedly provided at the upper part of the filter cavity along the width direction of the shell, and the second rack is meshed with the second gear.

[0013] Preferably, the exhaust unit includes a filter box arranged at the lower part of the outer shell, the filter box is filled with water, a feed opening is opened at the bottom of the filter cavity on the side of the filter screen away from the filter cavity opening, an extension pipe is vertically arranged on the feed opening, the extension pipe extends to below the water surface in the filter box, an outlet is arranged on the upper part of the filter box, an exhaust fan is arranged on the outlet, and a sponge is arranged at the front end of the exhaust fan.

[0014] Preferably, a filter cover is provided on the side wall of the filter box, the filter cover and the side wall of the filter box form a clean chamber, an atomization chamber is present between the sponge and the liquid level of water in the filter box, an atomization nozzle is provided on the side wall of the atomization chamber, the atomization nozzle is located above the liquid level of water in the filter box, a circulation pipe is provided between the atomization nozzle and the clean chamber to connect the two, and a water pump is provided on the circulation pipe.

[0015] Preferably, a snap-in block is arranged at the upper part of the filter chamber for movement in the vertical direction, the snap-in block passes through the top of the filter chamber, and an electric push rod is arranged vertically at the upper part of the snap-in block, the electric push rod is used to drive the snap-in block to move, and after the snap-in block slides into the filter chamber, the snap-in block slides with the side wall of the filter net.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention sets two filter chambers in the shell along the width direction of the shell, and sets a rotatable filter in each filter chamber. During each filtration, the opening of one of the filter chambers is blocked by a baffle, so that only one filter chamber is in a filtering state at a time. During the filtration, the opening of the filter chamber where the filter to be cleaned is located is first blocked by the baffle of the driving unit, and then the filter in the filter chamber will rotate 180 degrees with the continued operation of the driving unit. Finally, the switch valve is opened, and the air extraction unit can act on the filter to be cleaned, that is, the outside air flows into the filter chamber through the switch valve, and the flowing air passes through the filter to be cleaned and is discharged by the air extraction unit. In this way, the dust attached to the filter can be cleaned, so that the filter can be used for a long time, and the dust removal efficiency of the dust removal device is improved.

[0017] 2. The present invention also provides a sliding block, and springs are provided on both sides of the sliding block, a first rack is provided on the sliding block, and a first gear is provided on one side of the first rack, the first gear and the first rack are meshed with each other, when the filter screen in one of the filter chambers needs to be cleaned, the sliding block moves toward one side of the filter chamber, and the sliding block pushes the baffle to move through the spring, when the baffle moves to the front end of the filter screen that needs to be cleaned, the baffle blocks the filter chamber opening corresponding to the filter screen, but the filter screen does not rotate at this time, as the first threaded rod continues to rotate, the sliding block squeezes the spring toward the filter screen that needs to be cleaned, so that the baffle no longer moves, but the sliding block can still move. When the baffle just blocks the filter chamber opening, the first rack provided on the sliding block does not mesh with the first gear, as the sliding block continues to move, the first rack provided on the sliding block can mesh with the first gear, the moving first rack drives the first gear to rotate, and through the transmission of the synchronous wheel and the synchronous belt, the filter screen rotates 180 degrees after the baffle stops moving. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional schematic diagram of an environmentally friendly dust removal device for a barite powder processing and crushing device of the present invention.

[0019] Figure 2 This is a cutaway perspective diagram of an environmentally friendly dust removal device for a barite powder processing and crushing device of the present invention. Figure 1 .

[0020] Figure 3 It is a side view of an environmentally friendly dust removal device for a barite powder processing and crushing device of the present invention.

[0021] Figure 4 The invention discloses an environmentally friendly dust removal device for a barite powder processing and crushing device. Figure 3 Schematic cross-sectional view at AA in the middle.

[0022] Figure 5 This is a three-dimensional schematic diagram of an environmentally friendly dust removal device for a barite powder processing and crushing device of the present invention after removing part of the outer shell Figure 1 .

[0023] Figure 6 The invention discloses an environmentally friendly dust removal device for a barite powder processing and crushing device. Figure 5 A local enlarged schematic diagram of point B in the middle.

[0024] Figure 7 This is a cutaway perspective diagram of an environmentally friendly dust removal device for a barite powder processing and crushing device of the present invention. Figure 2 .

[0025] Figure 8 The invention discloses an environmentally friendly dust removal device for a barite powder processing and crushing device. Figure 7 A partial enlarged schematic diagram of point C in the middle.

[0026] Fig. 9 This is a three-dimensional schematic diagram of an environmentally friendly dust removal device for a barite powder processing and crushing device of the present invention after removing part of the outer shell Figure 2 .

[0027] Fig.10 The invention discloses an environmentally friendly dust removal device for a barite powder processing and crushing device. Fig. 9 A partial enlarged schematic diagram of point D in the middle.

[0028] Fig.11 This is a cutaway perspective diagram of an environmentally friendly dust removal device for a barite powder processing and crushing device of the present invention. Figure 3 .

[0029] The numbers in the figure are: 1. Shell; 2. Filter unit; 21. Filter screen; 22. Filter chamber; 221. Clamping block; 222. Electric push rod; 23. Baffle; 231. Extension plate; 232. Sliding block; 233. Spring; 234. Transmission unit; 2341. First gear; 2342. Synchronous wheel; 2343. Synchronous belt; 235. First rack; 24. Driving unit; 241. First rotary driver; 242. First threaded rod; 2 5. Exhaust unit; 251. Exhaust fan; 252. Filter box; 253. Sponge; 254. Dropping port; 255. Extension pipe; 256. Filter cover; 257. Circulation pipe; 258. Water pump; 259. Atomizing nozzle; 26. Switch valve; 27. Cleaning unit; 271. Cleaning roller; 272. Cleaning rack; 273. Second threaded rod; 274. Second rotary drive; 275. Second gear; 276. Second rack. DETAILED DESCRIPTION

[0030] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0031] Reference Figure 1-Figure 3 and Figure 7 : An environmental protection device for a barite powder processing and crushing device, comprising a shell 1 interconnected with the crushing device, and a filter unit 2 arranged in the shell 1; the filter unit 2 comprises two filter chambers 22 arranged along the width direction of the shell 1, and a filter screen 21 is rotatably arranged in each filter chamber 22, and the rotation axis of the filter screen 21 is parallel to the vertical direction. The connection between the shell 1 and the crushing device is an air inlet, and an opening is provided on the side of the filter chamber 22 facing the air inlet. A baffle 23 is movably provided at the opening of the filter chamber 22 along the width direction of the shell 1, and the size of the baffle 23 is the same as the size of the opening of a single filter chamber 22. A driving unit 24 is provided on 23 for driving the baffle 23 to move along the width direction of the shell 1, and an exhaust unit 25 for extracting the air in the filter chamber 22 is provided in the filter chamber 22. The air entering the filter chamber 22 from the opening of the filter chamber 22 passes through the filter screen 21 and is discharged by the exhaust unit 25. The driving unit 24 is started once at a rated time interval. The driving unit 24 drives the baffle 23 to move between the two filter chambers 22 along the width direction of the shell 1. When the baffle 23 moves, the baffle 23 can only block one of the openings of the filter chamber 22 at a time, and then the filter screen 21 in the blocked filter chamber 22 rotates 180 degrees.

[0032] In the process of crushing barite powder, a large amount of dust will be generated in the crushing device, so it is necessary to remove dust in the crushing device in time, otherwise the dust in the crushing device will overflow from the feeding port of the crushing device, resulting in a high dust concentration in the surrounding environment of the crushing device. The existing dust removal method mostly extracts the air in the crushing device through a fan, and sets a filter 21 at the front end of the fan, but after a period of use, more dust will be attached to the filter 21, which will cause the filter 21 to be blocked, thus causing the filtering performance of the filter 21 to decrease. In order to avoid the occurrence of the above situation, the existing solution is to set a water spray unit at the front end of the filter 21, and intercept the dust by water mist, but the dust still needs to pass through the filter 21 after being intercepted by the water mist, so that the dust mixed with the water mist will stick to the filter 21 after being attached to the filter 21, and the filter 21 will still be blocked by dust.

[0033] In order to avoid the above situation, the filter unit 2 is redesigned so that the filter screen 21 in the filter unit 2 can be used for a long time and the filter screen 21 has a self-cleaning function. The specific structure and working process of the filter unit 2 are as follows: Two filter chambers 22 are arranged in the housing 1 along the width direction of the housing 1, and a rotatable filter screen 21 is arranged in each filter chamber 22. During each filtering, the opening of one of the filter chambers 22 is blocked by the baffle 23, so that only one filter chamber 22 is in the filtering state at a time. During filtering, the air extraction unit 25 arranged in the filter chamber 22 is started, and the air extraction unit 25 extracts the air in the filter chamber 22, so that the dust in the crushing device enters the housing 1 from the air inlet of the housing 1, enters the filter chamber 22 not blocked by the baffle 23, and is discharged by the air extraction unit 25 after passing through the filter screen 21. A rated time is preset for the rotation of the filter screen 21, and the drive unit 24 is started once every rated time. When the filter chamber 22 not blocked by the baffle 23 is used for a rated time, a large amount of dust is attached to the filter screen 21 in the filter chamber 22, so the filter screen 21 needs to be cleaned. First, the driving unit 24 is started, and the baffle 23 moves toward one side of the filter chamber 22. Before the baffle 23 completely blocks the opening of the filter chamber 22, the filter screen 21 in the filter chamber 22 will not rotate. Only after the baffle 23 blocks the opening of the filter chamber 22, as the driving unit 24 continues to operate, the filter screen 21 in the filter chamber 22 will rotate 180 degrees. A switch valve 26 is provided on one side of each filter chamber 22. The switch valve 26 will only open when the baffle 23 blocks the filter chamber 22. If the baffle 23 does not block the filter chamber 22, the switch valve 26 is in a closed state. And the switch valve 26 will only open after the filter screen 21 completely rotates 180 degrees. As the filter 21 to be cleaned completes a 180-degree rotation and the switch valve 26 is opened, the air extraction unit 25 can act on the filter 21 to be cleaned, that is, the outside air flows into the filter chamber 22 through the switch valve 26, and the flowing air passes through the filter 21 to be cleaned and is discharged by the air extraction unit 25, so that the dust attached to the filter 21 can be cleaned, so that the filter 21 can be used for a long time, thereby improving the dust removal efficiency of the dust removal device.

[0034] It is worth noting that, during the switching process of the baffle 23 , the filter screens 21 in the two filter chambers 22 filter the dust flowing into the housing 1 at the same time.

[0035] Reference Figure 2 , Figure 5 , Figure 8 and Fig.10Two extension plates 231 are horizontally fixed on the baffle 23, and the two extension plates 231 are respectively arranged on both sides of the baffle 23 along the width direction of the shell 1. A sliding block 232 is movable along the width direction of the shell 1 between the two extension plates 231. There are first gaps and second gaps between the two sides of the sliding block 232 and the two extension plates 231, respectively. The distances between the first gap and the second gap are equal. A spring 233 is respectively arranged in the first gap and the second gap, and both ends of the spring 233 are fixedly connected to the sliding block 232 and the extension plate 231, respectively.

[0036] The driving unit 24 includes a first rotation driver 241 and a first threaded rod 242. The first threaded rod 242 is arranged above the filter chamber 22 along the width direction of the shell 1. The first threaded rod 242 passes through the two extension plates 231 in sequence along the width direction of the shell 1 and slides with the two extension plates 231 respectively. The first threaded rod 242 also passes through the sliding block 232. The first threaded rod 242 is threadedly engaged with the sliding block 232. The first rotation driver 241 is preferably a servo motor.

[0037] Reference Fig. 9 and Fig.10 A transmission unit 234 connected to the filter screen 21 is provided on one side of the sliding block 232, and a first rack 235 is provided on the side of the sliding block 232 facing the transmission unit 234. The transmission unit 234 can engage with the first rack 235. When the baffle 23 just covers the opening of the filter chamber 22 under the drive of the driving unit 24, the transmission unit 234 does not contact the sliding block 232.

[0038] Reference Fig. 9 and Fig.10 The transmission unit 234 includes a first gear 2341 arranged on one side of the first rack 235 and meshing with the first rack 235. A synchronous wheel 2342 is respectively arranged at the upper end of the first gear 2341 and the filter screen 21. A synchronous belt 2343 is sleeved on the outer side of the two synchronous wheels 2342, and the synchronous belt 2343 cooperates with the synchronous wheel 2342 for transmission.

[0039] When the filter screen 21 in one of the filter chambers 22 needs to be cleaned, the first rotation driver 241 drives the sliding block 232 to rotate through the first threaded rod 242, so that the sliding block 232 moves toward one side of the filter chamber 22, and the sliding block 232 pushes the baffle 23 through the spring 233. When the baffle 23 moves to the front end of the filter screen 21 that needs to be cleaned, the baffle 23 covers the opening of the filter chamber 22 corresponding to the filter screen 21, but the filter screen 21 does not rotate at this time. As the first threaded rod 242 continues to rotate, the sliding block 232 squeezes the spring 233 on the side of the filter screen 21 that needs to be cleaned, thereby achieving the effect that the baffle 23 no longer moves but the sliding block 232 can still move. When the baffle 23 just blocks the opening of the filter chamber 22, the first rack 235 arranged on the sliding block 232 is not meshed with the first gear 2341. As the sliding block 232 continues to move, the first rack 235 arranged on the sliding block 232 can mesh with the first gear 2341. The moving first rack 235 drives the first gear 2341 to rotate. Through the transmission of the synchronous wheel 2342 and the synchronous belt 2343, the filter screen 21 rotates 180 degrees only after the baffle 23 stops moving. When the filter screen 21 in another filter chamber 22 needs to be cleaned, the first threaded rod 242 rotates in the opposite direction under the action of the first rotating driver 241, and the sliding block 232 moves in the opposite direction. The cleaned filter screen 21 rotates in the opposite direction by 180 degrees under the meshing action of the first rack 235 and the first gear 2341. After the spring 233 squeezed by the sliding block 232 is restored, the sliding block 232 can drive the baffle 23 to move in the opposite direction through the spring 233 on the other side thereof.

[0040] Reference Figure 3 and Figure 4 : A switch valve 26 is provided on the side wall of the filter chamber 22. After the baffle 23 blocks the opening of the filter chamber 22, the switch valve 26 is opened.

[0041] Since the air extraction unit 25 is always in operation, when the baffle 23 blocks the opening of the filter chamber 22, the air at the air inlet of the housing 1 cannot flow into the filter chamber 22. After the switch valve 26 is opened, under the action of the air extraction unit 25, the outside air can flow into the filter chamber 22 through the switch valve 26, and the dust attached to the filter 21 can be blown off when the air passes through the filter 21. It is worth noting that before the switch valve 26 is opened, the filter 21 in the filter chamber 22 needs to be rotated 180 degrees in advance, so that the side of the filter 21 with dust attached faces the side away from the opening of the filter chamber 22.

[0042] Reference Figure 5 , Fig. 9 and Fig.11A cleaning unit 27 for cleaning the mesh surface of the filter 21 is provided on the side of the filter 21 away from the opening of the filter chamber 22. The cleaning unit 27 includes a cleaning frame 272 which moves along the width direction of the outer shell 1. A cleaning roller 271 is vertically rotatably provided on the cleaning frame 272. A second threaded rod 273 is rotatably provided in the filter chamber 22 along the width direction of the outer shell 1. The second threaded rod 273 penetrates the cleaning frame 272 and is threadedly matched with the cleaning frame 272. A second rotating driver 274 for driving the second threaded rod 273 to rotate is provided at the end of the second threaded rod 273.

[0043] Reference Figure 6 A second gear 275 is provided at the end of the cleaning roller 271 , and a second rack 276 is fixedly provided at the upper part of the filter chamber 22 along the width direction of the shell 1 , and the second rack 276 and the second gear 275 are meshed with each other.

[0044] When the baffle 23 blocks the opening of the filter chamber 22, the filter screen 21 in the filter chamber 22 is in a cleaned state. At this time, the switch valve 26 is opened, and the second rotary driver 274 is also started. The second rotary driver 274 is preferably a servo motor. The second rotary driver 274 drives the cleaning frame 272 to reciprocate in the filter chamber 22 along the width direction of the shell 1 through the second threaded rod 273. The cleaning frame 272 drives the cleaning roller 271 to move synchronously. A second gear 275 is provided at the end of the cleaning roller 271. The second gear 275 and the second rack 276 are engaged with each other. In the process of the cleaning frame 272 moving along the width direction of the shell 1, the second gear 275 drives the cleaning roller 271 to rotate, and the cleaning roller 271 sweeps the mesh surface of the filter screen 21, thereby improving the cleaning effect of the filter screen 21.

[0045] Reference Figure 4 and Figure 7 The exhaust unit 25 includes a filter box 252 arranged at the lower part of the shell 1, and water is contained in the filter box 252. A drop-out port 254 is provided at the bottom of the filter cavity 22 on the side of the filter screen 21 away from the opening of the filter cavity 22. An extension pipe 255 is vertically provided on the drop-out port 254. The extension pipe 255 extends to below the water surface in the filter box 252. An outlet is provided at the upper part of the filter box 252, and an exhaust fan 251 is provided on the outlet. A sponge 253 is provided at the front end of the exhaust fan 251.

[0046] Reference Figure 4 and Figure 5: A filter cover 256 is arranged on the side wall of the filter box 252, and the filter cover 256 and the side wall of the filter box 252 form a clean chamber. There is an atomization chamber between the sponge 253 and the liquid level of water in the filter box 252. An atomization nozzle 259 is arranged on the side wall of the atomization chamber. The atomization nozzle 259 is located above the liquid level of water in the filter box 252. A circulation pipe 257 is arranged between the atomization nozzle 259 and the clean chamber to connect the two, and a water pump 258 is arranged on the circulation pipe 257.

[0047] The dust floating in the air is collected through the filter 21. When the exhaust fan 251 is running, the dust can adhere to the filter 21. As the dust on the filter 21 accumulates more and more, when the filter 21 rotates in the opposite direction, a large amount of dust gathered together will fall into the filter box 252 through the extension tube 255. Only a small part of the dust can rise again with the flowing air, and most of the dust sinks directly to the bottom of the filter box 252. If the filter 21 is not set, the volume of dust floating in the air is small, which will cause a large amount of dust to flow into the atomization chamber, and then cause a large amount of dust to quickly accumulate at the bottom of the sponge 253. By arranging a sponge 253 at the front end of the exhaust fan 251, it is ensured that the air exhausted by the exhaust fan 251 is always clean. At the same time, by arranging a circulation pipe 257 to supply water to the atomizing nozzle 259, the water source in the filter box 252 can achieve self-circulation. Since a filter cover 256 is provided at the water inlet end of the circulation pipe 257, the situation in which the circulation pipe 257 is blocked by suspended dust in the filter box 252 is avoided.

[0048] Reference Figure 8 A clamping block 221 is arranged vertically on the upper part of the filter chamber 22 for movement. The clamping block 221 passes through the top of the filter chamber 22. An electric push rod 222 is arranged vertically on the upper part of the clamping block 221 for driving the clamping block 221 to move. After the clamping block 221 slides into the filter chamber 22, the clamping block 221 slides with the side wall of the filter screen 21.

[0049] It is ensured that the clamping block 221 can clamp the filter 21 every time the filter 21 rotates 180 degrees, so as to prevent the filter 21 from shaking during the operation of the air extraction unit 25. When the filter 21 needs to rotate, the electric push rod 222 drives the clamping block 221 to retract, and the clamping block 221 slides out of the filter cavity 22, so that the filter 21 can rotate normally.

[0050] Working principle: two filter chambers 22 are arranged in the housing 1 along the width direction of the housing 1, and a rotatable filter screen 21 is arranged in each filter chamber 22. During each filtration, the opening of one of the filter chambers 22 is blocked by the baffle 23, so that only one filter chamber 22 is in the filtering state at a time. During the filtration, the air extraction unit 25 arranged in the filter chamber 22 is started, and the air extraction unit 25 extracts the air in the filter chamber 22, so that the dust in the crushing device enters the housing 1 from the air inlet of the housing 1, enters the filter chamber 22 not blocked by the baffle 23, and is discharged by the air extraction unit 25 after passing through the filter screen 21. A rated time is preset for the rotation of the filter screen 21, and the drive unit 24 is started once every rated time. When the filter chamber 22 not blocked by the baffle 23 is used for a rated time, a large amount of dust is attached to the filter screen 21 in the filter chamber 22, so the filter screen 21 needs to be cleaned. First, the driving unit 24 is started, and the baffle 23 moves toward one side of the filter chamber 22. Before the baffle 23 completely blocks the opening of the filter chamber 22, the filter screen 21 in the filter chamber 22 will not rotate. Only after the baffle 23 blocks the opening of the filter chamber 22, as the driving unit 24 continues to operate, the filter screen 21 in the filter chamber 22 will rotate 180 degrees. A switch valve 26 is provided on one side of each filter chamber 22. The switch valve 26 will only open when the baffle 23 blocks the filter chamber 22. If the baffle 23 does not block the filter chamber 22, the switch valve 26 is in a closed state. And the switch valve 26 will only open after the filter screen 21 completely rotates 180 degrees. As the filter 21 to be cleaned completes a 180-degree rotation and the switch valve 26 is opened, the exhaust unit 25 can act on the filter 21 to be cleaned, that is, the outside air flows into the filter chamber 22 through the switch valve 26, and the flowing air passes through the filter 21 to be cleaned and is discharged by the exhaust unit 25, so that the dust attached to the filter 21 can be cleaned.

[0051] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the protection scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. An environmentally friendly dust removal device for a barite powder processing and crushing device, comprising a housing (1) interconnected with the crushing device, and a filter unit (2) arranged in the housing (1); It is characterized in that The filter unit (2) comprises two filter chambers (22) arranged along the width direction of the housing (1), a filter screen (21) is rotatably arranged in each filter chamber (22), the rotation axis of the filter screen (21) is parallel to the vertical direction, the connection between the housing (1) and the crushing device is an air inlet, an opening is provided on the side of the filter chamber (22) facing the air inlet, a baffle (23) is movably arranged at the opening of the filter chamber (22) along the width direction of the housing (1), the size of the baffle (23) is the same as the size of the opening of a single filter chamber (22), and a driving mechanism for driving the baffle (23) to move along the width direction of the housing (1) is provided on the baffle (23). The unit (24) is provided in the filter chamber (22) with an exhaust unit (25) for extracting air from the filter chamber (22). The air entering the filter chamber (22) from the opening of the filter chamber (22) passes through the filter screen (21) and is then discharged from the exhaust unit (25). The drive unit (24) is started once at a rated time interval. The drive unit (24) drives the baffle (23) to move between the two filter chambers (22) along the width direction of the housing (1). When the baffle (23) moves, the baffle (23) can only block the opening of one of the filter chambers (22) at a time, and then the filter screen (21) in the blocked filter chamber (22) rotates 180 degrees.

2. The environmentally friendly dust removal device for a barite powder processing and crushing device according to claim 1, characterized in that: Two extension plates (231) are fixedly arranged horizontally on the baffle plate (23); the two extension plates (231) are respectively arranged on both sides of the baffle plate (23) along the width direction of the housing (1); a sliding block (232) is movably arranged between the two extension plates (231) along the width direction of the housing (1); a first gap and a second gap are respectively provided between the two sides of the sliding block (232) and the two extension plates (231); the first gap and the second gap are equidistant; a spring (233) is respectively provided in the first gap and the second gap; two ends of the spring (233) are respectively fixedly connected to the sliding block (232) and the extension plate (231).

3. The environmentally friendly dust removal device for a barite powder processing and crushing device according to claim 2, characterized in that: A transmission unit (234) connected to the filter screen (21) is provided on one side of the sliding block (232), and a first rack (235) is provided on the side of the sliding block (232) facing the transmission unit (234). The transmission unit (234) can mesh with the first rack (235). When the baffle (23) is driven by the driving unit (24) to cover the opening of the filter chamber (22), the transmission unit (234) is not in contact with the sliding block (232).

4. The environmentally friendly dust removal device for a barite powder processing and crushing device according to claim 3, characterized in that: The transmission unit (234) comprises a first gear (2341) arranged on one side of the first rack (235) and meshing with the first rack (235); a synchronous wheel (2342) is respectively arranged on the upper end of the first gear (2341) and the filter screen (21); a synchronous belt (2343) is sleeved on the outside of the two synchronous wheels (2342); the synchronous belt (2343) and the synchronous wheel (2342) are in transmission cooperation.

5. The environmentally friendly dust removal device for a barite powder processing and crushing device according to claim 1, characterized in that: An on-off valve (26) is provided on the side wall of the filter chamber (22); after the baffle plate (23) blocks the opening of the filter chamber (22), the on-off valve (26) is opened.

6. The environmentally friendly dust removal device for a barite powder processing and crushing device according to claim 1, characterized in that: A cleaning unit (27) for cleaning the mesh surface of the filter screen (21) is arranged on a side of the filter screen (21) away from the opening of the filter chamber (22); the cleaning unit (27) comprises a cleaning frame (272) movable along the width direction of the housing (1); a cleaning roller (271) is arranged on the cleaning frame (272) to rotate vertically; a second threaded rod (273) is arranged in the filter chamber (22) to rotate along the width direction of the housing (1); the second threaded rod (273) passes through the cleaning frame (272) and is threadably engaged with the cleaning frame (272); and a second rotation driver (274) for driving the second threaded rod (273) to rotate is arranged at the end of the second threaded rod (273).

7. The environmentally friendly dust removal device for a barite powder processing and crushing device according to claim 6, characterized in that: A second gear (275) is provided at the end of the cleaning roller (271), and a second rack (276) is fixedly provided at the upper part of the filter cavity (22) along the width direction of the housing (1), and the second rack (276) and the second gear (275) are meshed with each other.

8. The environmentally friendly dust removal device for a barite powder processing and crushing device according to claim 1, characterized in that: The air extraction unit (25) comprises a filter box (252) arranged at the lower part of the housing (1), the filter box (252) containing water, a drop opening (254) is provided at the bottom of the filter cavity (22) on the side of the filter screen (21) away from the opening of the filter cavity (22), an extension pipe (255) is vertically arranged on the drop opening (254), the extension pipe (255) extends to below the water surface in the filter box (252), an outlet is provided at the upper part of the filter box (252), an exhaust fan (251) is provided on the outlet, and a sponge (253) is provided at the front end of the exhaust fan (251).

9. The environmentally friendly dust removal device for a barite powder processing and crushing device according to claim 8, characterized in that: A filter cover (256) is arranged on the side wall of the filter box (252), and the filter cover (256) and the side wall of the filter box (252) form a clean chamber. An atomizing chamber is present between the sponge (253) and the liquid surface of water in the filter box (252). An atomizing nozzle (259) is arranged on the side wall of the atomizing chamber. The atomizing nozzle (259) is located above the liquid surface of water in the filter box (252). A circulation pipe (257) is arranged between the atomizing nozzle (259) and the clean chamber to connect the two. A water pump (258) is arranged on the circulation pipe (257).

10. The environmentally friendly dust removal device for a barite powder processing and crushing device according to claim 1, characterized in that: A clamping block (221) is arranged at the top of the filter cavity (22) to move in the vertical direction. The clamping block (221) passes through the top of the filter cavity (22). An electric push rod (222) is arranged vertically at the top of the clamping block (221). The electric push rod (222) is used to drive the clamping block (221) to move. After the clamping block (221) slides into the filter cavity (22), the clamping block (221) and the side wall of the filter screen (21) are slidably matched.

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