An environmental protection dust removal device for a barite powder processing and crushing device

Abstract

The present invention relates to the technical field of barite production equipment, and specifically relates to an environmental protection dust removal device for a barite powder processing and crushing device, which includes a housing and a filtering unit; the filtering unit includes two filtering chambers arranged along the width direction of the housing, and a filter screen is rotatably arranged in each filtering chamber. The rotation axis of the filter screen is parallel to the vertical direction. The connection between the housing and the crushing device is an air inlet. An opening is provided on the side of the filtering chamber facing the air inlet. A baffle is movably arranged along the width direction of the housing at the opening of the filtering chamber. The size of the baffle is the same as the size of the opening of a single filtering chamber. A driving unit for driving the baffle to move along the width direction of the housing is arranged on the baffle. An air extraction unit for extracting the air in the filtering chamber is arranged in the filtering chamber. The air entering the filtering chamber from the opening of the filtering chamber passes through the filter screen and is discharged by the air extraction unit. The present invention prolongs the service life of the filter screen and improves the dust removal efficiency.

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] To solve the above problems, an environmental protection dust removal device for a barite powder processing and crushing device is provided. By arranging two filter chambers along the width direction of the outer shell inside the outer shell, and arranging a rotatable filter screen 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 the filtration state each time. When filtering, first, the baffle of the driving unit blocks the opening of the filter chamber where the filter screen to be cleaned is located. Subsequently, as the driving unit continues to operate, the filter screen in the filter chamber will rotate 180 degrees. Finally, the switching valve is opened. At this time, the air extraction unit can act on the filter screen to be cleaned, that is, the outside air flows into the filter chamber through the switching valve, and the flowing air passes through the filter screen to be cleaned and is discharged by the air extraction unit. In this way, the dust attached to the filter screen can be cleaned up completely.

[0006] To solve the problems of the prior art, the present invention provides an environmental protection dust removal device for a barite powder processing and crushing device, which includes an outer shell communicated with the crushing device, and a filtering unit arranged inside the outer shell; the filtering unit includes two filter chambers arranged along the width direction of the outer shell, and a filter screen is rotatably arranged in each filter chamber. The rotation axis of the filter screen is parallel to the vertical direction. The connection between the outer shell and the crushing device is the air inlet. An opening is provided on the side of the filter chamber facing the air inlet. A baffle is movably arranged along the width direction of the outer shell at the opening of the filter chamber. The size of the baffle is the same as the size of the opening of a single filter chamber. A driving unit for driving the baffle to move along the width direction of the outer shell is arranged on the baffle. An air extraction unit for extracting the air in the filter chamber is arranged in the filter chamber. The air entering the filter chamber from the opening of the filter chamber passes through the filter screen and is discharged by the air extraction unit. The driving unit is started once every rated time. The driving unit drives the baffle to move between the two filter chambers along the width direction of the outer shell. When the baffle moves, the baffle can only block the opening of one of the filter chambers each time. Subsequently, the filter screen in the blocked filter chamber rotates 180 degrees.

[0007] Preferably, two extension plates are horizontally and fixedly arranged on the baffle. The two extension plates are respectively arranged on both sides of the baffle along the width direction of the outer shell. A sliding block is movably arranged between the two extension plates along the width direction of the outer shell. There are a first gap and a second gap respectively between the two sides of the sliding block and the two extension plates. The first gap and the second gap are equal in distance. A spring is arranged in each of the first gap and the second gap. The two ends of the spring are respectively fixedly connected with the sliding block and the extension plate.

[0008] Preferably, a transmission unit connected to the filter screen is arranged on one side of the sliding block. A first rack is arranged on the side of the sliding block facing the transmission unit. The transmission unit can be meshed with the first rack. When the baffle just blocks the opening of the filter chamber under the drive of the driving unit, the transmission unit is not in contact with the sliding block.

[0009] Preferably, the transmission unit includes a first gear disposed on one side of the first rack and meshing with the first rack. A synchronous pulley is respectively disposed at the upper ends of the first gear and the filter net. A synchronous belt is sleeved outside the two synchronous pulleys, and the synchronous belt is in driving cooperation with the synchronous pulleys.

[0010] Preferably, a switching valve is disposed on the side wall of the filtering chamber. After the baffle blocks the opening of the filtering chamber, the switching valve is opened.

[0011] Preferably, a cleaning unit for cleaning the mesh surface of the filter net is disposed on the side of the filter net away from the opening of the filtering chamber. The cleaning unit includes a cleaning frame that moves along the width direction of the housing. A cleaning roller is vertically rotatably disposed on the cleaning frame. A second threaded rod is rotatably disposed along the width direction of the housing in the filtering chamber. The second threaded rod penetrates through the cleaning frame and is in threaded cooperation with the cleaning frame. A second rotary driver for driving the second threaded rod to rotate is disposed at the end of the second threaded rod.

[0012] Preferably, a second gear is disposed at the end of the cleaning roller. A second rack is fixedly disposed along the width direction of the housing at the upper part of the filtering chamber. The second rack meshes with the second gear.

[0013] Preferably, the air extraction unit includes a filtering box disposed at the lower part of the housing. Water is contained in the filtering box. A material dropping port is opened at the bottom of the filtering chamber on the side of the filter net away from the opening of the filtering chamber. An extension pipe is vertically disposed on the material dropping port and extends below the water surface in the filtering box. An outlet is disposed at the upper part of the filtering box. An exhaust fan is disposed on the outlet. A sponge is disposed at the front end of the exhaust fan.

[0014] Preferably, a filter cover is disposed on the side wall of the filtering box. The filter cover and the side wall of the filtering box form a clean chamber. An atomization chamber is provided between the sponge and the water surface in the filtering box. An atomizing nozzle is disposed on the side wall of the atomization chamber. The atomizing nozzle is located above the water surface in the filtering box. A circulation pipe communicating the two is disposed between the atomizing nozzle and the clean chamber. A water pump is disposed on the circulation pipe.

[0015] Preferably, a clamping block is movably disposed vertically at the upper part of the filtering chamber. The clamping block penetrates through the top of the filtering chamber. An electric push rod is vertically disposed at the upper part of the clamping block. The electric push rod is used to drive the clamping block to move. After the clamping block slides into the filtering chamber, the clamping block is in sliding cooperation with the side wall of the filter net.

[0016] The beneficial effects of the present invention compared with the prior art are:

[0017] 1. In the present invention, two filter chambers are arranged along the width direction of the outer shell inside the outer shell, and a rotatable filter screen is arranged 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 the filtration state each time. During filtration, first, the baffle of the drive unit blocks the opening of the filter chamber where the filter screen to be cleaned is located. Subsequently, as the drive unit continues to operate, the filter screen in the filter chamber will rotate 180 degrees. Finally, the on-off valve is opened. At this time, the air extraction unit can act on the filter screen to be cleaned, that is, the outside air flows into the filter chamber through the on-off valve, and the flowing air passes through the filter screen to be cleaned and is discharged by the air extraction unit. In this way, the dust attached to the filter screen can be cleaned cleanly, enabling the filter screen to be used for a long time and improving the dust removal efficiency of the dust removal device.

[0018] 2. The present invention also sets a sliding block, and springs are arranged on both sides of the sliding block. A first rack is arranged on the sliding block, and a first gear is arranged on one side of the first rack. The first gear meshes with the first rack. When the filter screen in one of the filter chambers needs to be cleaned, the sliding block moves towards the side of the filter chamber. The sliding block pushes the baffle to move through the spring. When the baffle moves to the front of the filter screen to be cleaned, the baffle blocks the opening of the filter chamber corresponding to the filter screen. However, at this time, the filter screen does not rotate. As the first threaded rod continues to rotate, the sliding block squeezes the spring on the side towards the filter screen to be cleaned. In this way, although the baffle no longer moves, the sliding block can still move. When the baffle just blocks the opening of the filter chamber, the first rack arranged on the sliding block does not mesh with the first gear. As the sliding block continues to move, the first rack arranged on the sliding block can mesh with the first gear. The moving first rack drives the first gear to rotate. Through the transmission of the synchronous pulley and the synchronous belt, the effect that the filter screen rotates 180 degrees only after the baffle stops moving is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a three-dimensional schematic diagram of an environmental protection dust removal device for a barite powder processing and crushing device of the present invention.

[0020] Figure 2 is a sectional three-dimensional schematic of an environmental protection dust removal device for a barite powder processing and crushing device of the present invention Figure 1 .

[0021] Figure 3 is a side view of an environmental protection dust removal device for a barite powder processing and crushing device of the present invention.

[0022] Figure 4 is an environmental protection dust removal device for a barite powder processing and crushing device of the present invention Figure 3 sectional schematic diagram at A-A.

[0023] Figure 5 It is a three-dimensional schematic diagram of an environmental protection dust removal device for a barite powder processing and crushing device of the present invention after removing part of the outer shell Figure 1 。

[0024] Figure 6 It is of an environmental protection dust removal device for a barite powder processing and crushing device of the present invention Figure 5 Partial enlarged schematic diagram at position B

[0025] Figure 7 It is a sectional three-dimensional schematic diagram of an environmental protection dust removal device for a barite powder processing and crushing device of the present invention Figure 2 。

[0026] Figure 8 It is of an environmental protection dust removal device for a barite powder processing and crushing device of the present invention Figure 7 Partial enlarged schematic diagram at position C

[0027] Figure 9 It is a three-dimensional schematic diagram of an environmental protection dust removal device for a barite powder processing and crushing device of the present invention after removing part of the outer shell Figure 2 。

[0028] Figure 10 It is of an environmental protection dust removal device for a barite powder processing and crushing device of the present invention Figure 9 Partial enlarged schematic diagram at position D

[0029] Figure 11 It is a sectional three-dimensional schematic diagram of an environmental protection dust removal device for a barite powder processing and crushing device of the present invention Figure 3 。

[0030] The labels in the figure are as follows

[0031] 1. Outer shell; 2. Filter unit; 21. Filter net; 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 pulley; 2343. Synchronous belt; 235. First rack; 24. Driving unit; 241. First rotary driver; 242. First threaded rod; 25. Air extraction unit; 251. Exhaust fan; 252. Filter box; 253. Sponge; 254. Feeding port; 255. Extension pipe; 256. Filter hood; 257. Circulation pipe; 258. Water pump; 259. Atomizing nozzle; 26. Switch valve; 27. Cleaning unit; 271. Cleaning roller; 272. Cleaning frame; 273. Second threaded rod; 274. Second rotary driver; 275. Second gear; 276. Second rack Detailed implementation manners

[0032] In order to further understand the features, technical means, specific purposes and functions achieved by the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0033] Referring to Figures 1 - 3 and Figure 7 : An environmental protection device for a barite powder processing and crushing device, including a housing 1 communicating with the crushing device, and a filtering unit 2 arranged in the housing 1; the filtering unit 2 includes two filtering chambers 22 arranged along the width direction of the housing 1, and a filter net 21 is rotatably arranged in each filtering chamber 22. The rotation axis of the filter net 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 filtering chamber 22 facing the air inlet. A baffle 23 is movably arranged along the width direction of the housing 1 at the opening of the filtering chamber 22. The size of the baffle 23 is the same as the size of the opening of a single filtering chamber 22. A driving unit 24 for driving the baffle 23 to move along the width direction of the housing 1 is arranged on the baffle 23. An air extraction unit 25 for extracting the air in the filtering chamber 22 is arranged in the filtering chamber 22. The air entering the filtering chamber 22 from the opening of the filtering chamber 22 passes through the filter net 21 and is discharged by the air extraction unit 25. The driving unit 24 is started once every rated time. The driving unit 24 drives the baffle 23 to move between the two filtering 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 filtering chambers 22 each time. Subsequently, the filter net 21 in the blocked filtering chamber 22 rotates 180 degrees.

[0034] During the crushing process of barite powder, a large amount of dust will be generated in the crushing device. Therefore, it is necessary to remove dust from the crushing device in a timely manner. 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 environment around the crushing device. Most of the existing dust removal methods are to extract the air in the crushing device through a fan, and a filter net 21 is arranged at the front end of the fan. However, after using for a period of time, more dust will adhere to the filter net 21, which will cause the filter net 21 to be blocked, resulting in a decline in the filtering performance of the filter net 21. In order to avoid the above situation, the existing solution is to arrange a water spraying unit at the front end of the filter net 21 to intercept the dust through water mist. However, the dust still needs to pass through the filter net 21 after being intercepted by the water mist. After the dust mixed with the water mist adheres to the filter net 21, the filter net 21 will be blocked, and the filter net 21 will still be blocked by dust.

[0035] In order to avoid the above situation, the filtering unit 2 is redesigned so that the filter net 21 in the filtering unit 2 can be used for a long time and the filter net 21 has a self-cleaning function. The specific structure and working process of the filtering unit 2 are as follows:

[0036] By arranging two filter chambers 22 along the width direction of the outer shell 1 inside the outer shell 1, and arranging a rotatable filter net 21 in each filter chamber 22. During each filtration, the opening of one of the filter chambers 22 is blocked by a baffle 23, so that only one filter chamber 22 is in the filtration state each time. During 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. In this way, after the dust in the crushing device enters the outer shell 1 from the air inlet of the outer shell 1, it 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 net 21. A rated time is preset for the rotation of the filter net 21, and the driving unit 24 is started once every rated time. When the filter chamber 22 not blocked by the baffle 23 is used up to the rated time, a large amount of dust adheres to the filter net 21 in the filter chamber 22. In this way, it is necessary to clean the filter net 21. First, the driving unit 24 is started, and the baffle 23 moves towards the side of the filter chamber 22. Before the baffle 23 completely blocks the opening of the filter chamber 22, the filter net 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 net 21 in the filter chamber 22 will rotate 180 degrees. A switching valve 26 is arranged on one side of each filter chamber 22. The switching 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 switching valve 26 is in the closed state. And the switching valve 26 will only open after the filter net 21 rotates 180 degrees completely. As the filter net 21 to be cleaned completes a 180-degree rotation and the switching valve 26 is opened at the same time, at this time, the air extraction unit 25 can act on the filter net 21 to be cleaned, that is, the outside air flows into the filter chamber 22 through the switching valve 26, and the flowing air passes through the filter net 21 to be cleaned and is discharged by the air extraction unit 25. In this way, the dust adhering to the filter net 21 can be cleaned cleanly, so that the filter net 21 can be used for a long time, and the dust removal efficiency of the dust removal device is improved.

[0037] It should be noted that during the switching process of the baffle 23, the filter nets 21 in the two filter chambers 22 filter the dust flowing into the outer shell 1 at the same time.

[0038] Refer to Figure 2 、 Figure 5 、 Figure 8 and Figure 10: Two extension plates 231 are horizontally and fixedly arranged on the baffle 23. The two extension plates 231 are respectively arranged on both sides of the baffle 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. There are a first gap and a second gap respectively between the two sides of the sliding block 232 and the two extension plates 231. The first gap and the second gap are equal in distance. A spring 233 is arranged in each of the first gap and the second gap. The two ends of the spring 233 are respectively fixedly connected to the sliding block 232 and the extension plate 231.

[0039] The driving unit 24 includes a first rotary driver 241 and a first threaded rod 242. The first threaded rod 242 is arranged above the filtering chamber 22 along the width direction of the housing 1. The first threaded rod 242 sequentially penetrates through the two extension plates 231 along the width direction of the housing 1 and is respectively in sliding fit with the two extension plates 231. The first threaded rod 242 also penetrates through the sliding block 232 at the same time. The first threaded rod 242 is in threaded fit with the sliding block 232. The first rotary driver 241 is preferably a servo motor.

[0040] Refer to Figure 9 and Figure 10 : A transmission unit 234 connected to the filter net 21 is arranged on one side of the sliding block 232. A first rack 235 is arranged on the side of the sliding block 232 facing the transmission unit 234. The transmission unit 234 can be meshed with the first rack 235. When the baffle 23 just covers the opening of the filtering chamber 22 under the drive of the driving unit 24, the transmission unit 234 is not in contact with the sliding block 232.

[0041] Refer to Figure 9 and Figure 10 : The transmission unit 234 includes a first gear 2341 arranged on one side of the first rack 235 and meshed with the first rack 235. A synchronous pulley 2342 is respectively arranged at the upper ends of the first gear 2341 and the filter net 21. A synchronous belt 2343 is sleeved outside the two synchronous pulleys 2342. The synchronous belt 2343 is in transmission fit with the synchronous pulley 2342.

[0042] When the filter screen 21 in one of the filter chambers 22 needs to be cleaned, the first rotary driver 241 drives the sliding block 232 to rotate through the first threaded rod 242, so that the sliding block 232 moves toward the side of the filter chamber 22. The sliding block 232 pushes the baffle 23 through the spring 233. When the baffle 23 moves to the front of the filter screen 21 to be cleaned, the baffle 23 shields the opening of the filter chamber 22 corresponding to the filter screen 21. However, at this time, the filter screen 21 does not rotate. 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 to be cleaned. In this way, although the baffle 23 no longer moves, the sliding block 232 can still move. When the baffle 23 just blocks the opening of the filter chamber 22, the first rack 235 provided on the sliding block 232 is not engaged with the first gear 2341. As the sliding block 232 continues to move, the first rack 235 provided on the sliding block 232 can be engaged with the first gear 2341. The moving first rack 235 drives the first gear 2341 to rotate. Through the transmission of the synchronous pulley 2342 and the synchronous belt 2343, the effect that the filter screen 21 rotates 180 degrees only after the baffle 23 stops moving is achieved. When the filter screen 21 in the other filter chamber 22 needs to be cleaned, the first threaded rod 242 rotates reversely under the action of the first rotary driver 241, and the sliding block 232 moves reversely. The filter screen 21 that has been cleaned rotates reversely 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 reversely through the spring 233 on its other side.

[0043] Refer to Figure 3 and Figure 4 : A switching 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 switching valve 26 is opened.

[0044] 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 switching 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 switching valve 26. When the air passes through the filter screen 21, the dust attached to the filter screen 21 can be blown off. It should be noted that before the switching valve 26 is opened, the filter screen 21 in the filter chamber 22 needs to be rotated 180 degrees in advance so that the side of the filter screen 21 with dust attached faces away from the opening of the filter chamber 22.

[0045] Refer to Figure 5 、 Figure 9 and Figure 11: A cleaning unit 27 for cleaning the mesh surface of the filter net 21 is provided on the side of the filter net 21 away from the opening of the filter chamber 22. The cleaning unit 27 includes a cleaning frame 272 that moves along the width direction of the housing 1. A cleaning roller 271 is vertically rotatably arranged on the cleaning frame 272. A second threaded rod 273 is rotatably arranged along the width direction of the housing 1 in the filter chamber 22. The second threaded rod 273 penetrates through the cleaning frame 272 and is in threaded cooperation with the cleaning frame 272. A second rotary driver 274 for driving the second threaded rod 273 to rotate is provided at the end of the second threaded rod 273.

[0046] Refer to Figure 6 : A second gear 275 is provided at the end of the cleaning roller 271. A second rack 276 is fixedly arranged along the width direction of the housing 1 at the upper part of the filter chamber 22. The second rack 276 meshes with the second gear 275.

[0047] When the baffle 23 blocks the opening of the filter chamber 22, the filter net 21 in the filter chamber 22 is in a state of being cleaned. At this time, the switching valve 26 is opened, and at the same time, 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 along the width direction of the housing 1 in the filter chamber 22 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 meshes with the second rack 276. During the process of the cleaning frame 272 moving along the width direction of the housing 1, the second gear 275 drives the cleaning roller 271 to rotate, and the cleaning roller 271 sweeps the mesh surface of the filter net 21, improving the cleaning effect on the filter net 21.

[0048] Refer to Figure 4 and Figure 7 : The air extraction unit 25 includes a filter box 252 provided at the lower part of the housing 1. The filter box 252 is filled with water. A material dropping port 254 is opened at the bottom of the filter chamber 22 on the side of the filter net 21 away from the opening of the filter chamber 22. An extension pipe 255 is vertically arranged on the material dropping port 254, and the extension pipe 255 extends 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.

[0049] Refer to Figure 4 and Figure 5: A filter cover 256 is provided on the side wall of the filter box 252. The filter cover 256 and the side wall of the filter box 252 form a clean cavity. An atomization cavity is provided between the sponge 253 and the liquid level of the water in the filter box 252. An atomizing nozzle 259 is provided on the side wall of the atomization cavity. The atomizing nozzle 259 is located above the liquid level of the water in the filter box 252. A circulation pipe 257 connecting the two is provided between the atomizing nozzle 259 and the clean cavity, and a water pump 258 is provided on the circulation pipe 257.

[0050] The dust floating in the air is centrally collected through the filter net 21. When the exhaust fan 251 is running, the dust can adhere to the filter net 21. As the dust on the filter net 21 accumulates more and more, when the filter net 21 rotates reversely, a large amount of dust gathered together will fall into the filter box 252 through the extension pipe 255. Only a small part of the dust can rise again with the flowing air, and most of the dust will directly sink to the bottom of the filter box 252. If the filter net 21 is not provided, the volume of the dust floating in the air is small, which will cause a large amount of dust to pour into the atomization cavity, and then a large amount of dust will quickly accumulate in the lower part of the sponge 253. By providing the sponge 253 at the front end of the exhaust fan 251, it is ensured that the air discharged by the exhaust fan 251 is always clean. At the same time, by providing the circulation pipe 257 to supply water to the atomizing nozzle 259, the water source in the filter box 252 can realize self-circulation. And because the water inlet end of the circulation pipe 257 is provided with a filter cover 256, the situation that the suspended dust in the filter box 252 blocks the circulation pipe 257 is avoided.

[0051] Refer to Figure 8 : A clamping block 221 is movably arranged vertically in the upper part of the filter cavity 22. The clamping block 221 penetrates through the top of the filter cavity 22. An electric push rod 222 is vertically arranged on the upper part 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 is in sliding fit with the side wall of the filter net 21.

[0052] It is ensured that every time the filter net 21 rotates 180 degrees, the clamping block 221 can clamp the filter net 21, avoiding the filter net 21 from shaking during the operation of the air extraction unit 25. When the filter net 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 net 21 can rotate normally.

[0053] Working principle: Two filter chambers 22 are arranged along the width direction of the outer shell 1 inside the outer shell 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 a baffle 23, so that only one filter chamber 22 is in the filtration state each time. During 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. In this way, after the dust in the crushing device enters the outer shell 1 from the air inlet of the outer shell 1, it 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 driving unit 24 is started once every rated time. When the filter chamber 22 not blocked by the baffle 23 reaches the rated time, a large amount of dust adheres to the filter screen 21 in the filter chamber 22. Therefore, it is necessary to clean the filter screen 21. First, the driving unit 24 is started, and the baffle 23 moves towards the 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 switching valve 26 is arranged on one side of each filter chamber 22. The switching 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 switching valve 26 is in the closed state. And the switching valve 26 will only open after the filter screen 21 rotates 180 degrees completely. As the filter screen 21 to be cleaned completes a 180-degree rotation and the switching valve 26 opens at the same time, the air extraction unit 25 can then act on the filter screen 21 to be cleaned, that is, the outside air flows into the filter chamber 22 through the switching valve 26, and the flowing air passes through the filter screen 21 to be cleaned and is discharged by the air extraction unit 25. In this way, the dust adhering to the filter screen 21 can be cleaned up.

[0054] The above embodiments only represent one or several implementation manners of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended 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 every rated time. 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. Subsequently, the filter screen (21) in the blocked filter chamber (22) is rotated 180 degrees. 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 present 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 arranged in the first gap and the second gap, and two ends of the spring (233) are respectively fixedly connected to the sliding block (232) and the extension plate (231); 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), and the transmission unit (234) is not in contact with the sliding block (232); 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; When the baffle plate (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; and through the transmission of the synchronous wheel (2342) and the synchronous belt (2343), the filter screen (21) is rotated 180 degrees only after the baffle plate (23) stops moving.

2. 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.

3. 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).

4. The environmentally friendly dust removal device for a barite powder processing and crushing device according to claim 3, 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.

5. 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).

6. The environmentally friendly dust removal device for a barite powder processing and crushing device according to claim 5, 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).

7. 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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