CN118477421A - Fume purification treatment device for metal processing - Google Patents

Abstract

The invention relates to the technical field of flue gas treatment, and particularly discloses a flue gas purifying treatment device for metal processing, which comprises a frame body, wherein a cylinder body is arranged above the frame body, an exhaust fan is arranged at the upper end of the cylinder body, an air outlet is formed at one side of the cylinder body, the air inlet of the cylinder body is slightly larger than the air outlet at the air outlet, a filter plate is arranged in the cylinder body, the filter plate is of a cylindrical structure, the inside of the cylinder body is divided into a front filter cavity and a rear filter cavity by the filter plate, a cleaning mechanism comprises a mounting plate, a recoil plate and a sealing plate, the recoil plate is arranged at one side, close to the inner wall of the cylinder body, of the filter plate, a recoil cavity is formed between the recoil plate and the filter plate, a sealing plate is arranged at the other side of the filter plate, a trash collecting cavity is formed between the sealing plate and the filter plate, and a trash collecting bag is connected at the lower end of the mounting plate, corresponding to the trash collecting cavity; the invention can use the filtered gas to recoil and clean the filter plate so as to achieve the purpose of cleaning the filter plate, and can automatically adjust the cleaning speed according to the blocking degree of the filter plate.

Description

A fume purification device for metal processing

Technical Field

The invention relates to the technical field of flue gas treatment, and in particular to a flue gas purification treatment device for metal processing.

Background Art

The flue gas treatment device achieves the effect of protecting the environment and purifying the air by recovering, removing or reducing the harmful components of the emitted flue gas. In the related technology, a filter plate is usually set to treat the flue gas. The flue gas is drawn into the cylinder through an exhaust fan, and is discharged from the air outlet after being filtered by the filter plate, so that some impurities and particulate matter contained in the flue gas adhere to the surface of the filter plate, thereby achieving a simple filtering effect on the gas. In order to avoid clogging of the filter plate, the filter plate needs to be cleaned in time. The existing cleaning method usually uses a brushing method to clean the filter plate.

The patent document with publication number CN220071073U discloses a flue gas purification treatment device, including a ventilation pipe, in which multiple filter screens are installed side by side, and multiple mounting heads are arranged side by side in the ventilation pipe, bristles are installed on both sides of the mounting heads, and water flow holes connected to the interior of the mounting heads are opened at both ends of the mounting heads, and movable pipes are connected to the upper ends of the multiple mounting heads, sleeves are sleeved on the outer sides of the multiple movable pipes, and a water inlet hole is opened in the middle of the movable pipe, and a cleaning liquid tank is arranged at the upper end of the ventilation pipe, and two mounting pipes are connected to the ventilation pipe, and pipe covers are detachably installed on the mounting pipes, and mounting rods are fixedly connected to the pipe covers, and gas flow rate sensors are respectively connected to the two mounting rods. The patent can determine whether the filter screen is blocked by detecting the gas flow rate on both sides of the filter screen, and can automatically clean the filter screen after blocking, and at the same time, the filter screen is cleaned by brushing, which greatly improves the cleaning effect of the filter screen surface.

Although the flue gas purification device provided in the above patent document can clean the filter, when the filter is cleaned by brushing, particles with a certain hardness may cause damage to the filter. In addition, impurities and particles detached from the filter still remain in the ventilation pipe, which may clog the filter again during subsequent use, affecting the normal use of the filter.

Summary of the invention

The present invention provides a fume purification device for metal processing, aiming to solve the problem that when the fume purification device in the related art uses a brushing method to clean the filter, particulate matter may damage the filter, and in addition, impurities and particulate matter detached from the filter may clog the filter again during subsequent use.

A fume purification device for metal processing of the present invention comprises a frame and a cylinder arranged on the frame, an exhaust fan is arranged at the upper end of the cylinder, an air outlet is arranged at one side of the cylinder, and further comprises:

The filter plate is arranged in the cylinder body, and the filter plate is a cylindrical structure. The interior of the cylinder body is divided into a pre-filter chamber and a post-filter chamber by the filter plate;

The cleaning mechanism comprises a mounting plate, a recoil plate and a sealing plate, the recoil plate and the sealing plate are arranged on the mounting plate, the recoil plate is arranged on the outer side of the filter plate, and a recoil cavity is formed between the recoil plate and the filter plate, the sealing plate is arranged on the inner side of the filter plate, and a debris collecting cavity is formed between the sealing plate and the filter plate, a plurality of recoil holes are arranged on the recoil plate, a debris collecting bag is connected to the position of the debris collecting cavity at the lower end of the mounting plate, and the air inlet of the cylinder is slightly larger than the air outlet at the air outlet;

A first driving assembly, which is disposed on the frame and can drive the mounting plate to rotate;

The second driving assembly is arranged at the lower end of the cylinder and can drive the mounting plate to automatically adjust the rotation speed.

Beneficial effect: When the mounting plate is driven to rotate by the first driving assembly, the recoil plate and the sealing plate can be driven to rotate along the circumference of the filter plate, and the filter plate can be gradually recoil cleaned. At the same time, according to the different degrees of blockage of the filter plate, the rotation speed of the mounting plate can be automatically adjusted by the second driving assembly, so that the cleaning speed of the filter plate can be automatically adjusted to improve the cleaning effect of the filter plate.

Preferably, a square rod is provided at the lower end of the cylinder, the square rod passes through the mounting plate and is slidably connected to the mounting plate, and the square rod can rotate synchronously with the mounting plate, the first driving assembly includes a motor, a bevel gear and a friction wheel, the motor is arranged on the frame, the bevel gear is connected to the output end of the motor, the friction wheel is connected to the lower end of the square rod, and the bevel gear and the friction wheel are frictionally transmitted.

Beneficial effect: When the filter plate is seriously clogged, the pressure in the pre-filter chamber can be increased to drive the lifting plate to move downward, so as to change the transmission ratio between the friction wheel and the bevel gear, so that the rotation speed of the friction wheel becomes faster, thereby making the rotation speed of the mounting plate faster. That is, the more serious the filter plate is clogged, the faster the rotation speed of the mounting plate is, so as to ensure the cleaning efficiency of the filter plate.

Preferably, the second driving assembly includes a hollow rod disposed in the cylinder body, and a lifting plate movably disposed in the hollow rod, a plurality of ventilation holes are opened on the hollow rod, the lifting plate is connected to the upper end of the square rod, and a spring is connected between the lifting plate and the mounting plate.

Preferably, sealing strips are provided at both ends of the sealing plate where they contact the filter plate, so as to ensure that the gas in the pre-filter chamber cannot directly enter the impurity collecting chamber.

Preferably, it also includes a knocking mechanism, which includes a knocking rod and a third driving component for driving the knocking rod to move, the knocking rod is provided in plurality, and the plurality of knocking rods are arranged at intervals along the height direction of the recoil plate, each of the knocking rods penetrates the recoil plate and is slidably connected to the recoil plate, and a ball is connected to one end of each of the knocking rods facing the filter plate.

Beneficial effect: When the filter plate is seriously clogged, the third driving component can be used to drive the knocking rod to knock on the filter plate, thereby further improving the cleaning effect.

Preferably, the third driving assembly includes a mounting ring and a plurality of magnet bars arranged on the mounting ring, the mounting ring is rotatably arranged at the lower end of the cylinder, the mounting ring is rotatably sleeved on the outer side of the mounting plate, the plurality of magnet bars are arranged along the circumference of the mounting ring, and each magnet bar is located in the post-filter cavity, each of the knocking rods is provided with a magnet block at one end away from the sphere, the magnet block and the magnet bar can attract each other, and a second spring is connected between each of the magnet blocks and the recoil plate, and the second spring is sleeved on the outer side of the corresponding knocking rod.

Preferably, each of the magnet bars is arranged obliquely relative to the height direction of the cylinder, and a plurality of the magnet bars are inclined in the same direction along the circumference of the cylinder.

Beneficial effect: When the knocking rod rotates along the circumference of the filter plate, the magnet blocks at one end of the multiple knocking rods can be attracted to the same magnet bar in sequence from top to bottom, and drive the balls at the other end of the multiple knocking rods to knock on the filter plate in sequence from top to bottom, thereby avoiding damage to the filter plate caused by multiple balls knocking at the same time.

Preferably, a driving structure is also provided at the lower end of the cylinder for driving the mounting ring to rotate synchronously with the mounting plate, and the driving structure includes gear 1, a gear ring and gear 2. The gear 1 is rotatably connected to the lower end of the mounting plate through a bearing, and the gear ring is fixed to the lower end of the mounting ring. The gear 1 is meshingly connected to the gear ring. The gear 2 is arranged on the outside of the square rod, and the gear 2 can mesh with the gear 1.

Beneficial effect: A driving structure is provided, which can drive the mounting ring to rotate synchronously with the mounting plate, so that when the filter plate works normally, the knocking mechanism cannot knock on the filter plate, thereby avoiding damage to the filter plate caused by excessive knocking.

Preferably, the debris collecting bag is provided with a microporous structure for gas to pass through.

The beneficial effects of the present invention are:

1. The present invention is provided with a cleaning mechanism, which can drive the mounting plate to rotate through the first driving component, thereby driving the recoil plate and the sealing plate to rotate along the circumference of the filter plate, and gradually performing recoil cleaning on the filter plate, thereby improving the damage to the filter plate that may be caused by the brushing method, extending the service life of the filter plate, and preventing the impurities that fall off from clogging the filter plate again. In addition, a second driving component is provided, which can automatically adjust the rotation speed of the mounting plate, so that the cleaning speed of the filter plate can be automatically adjusted according to the degree of clogging of the filter plate, so as to improve the cleaning effect of the filter plate.

2. The present invention is provided with a knocking mechanism, which can drive the knocking rod to knock on the filter plate through the cooperation between the magnet block and the magnet bar when the filter plate is seriously clogged, thereby further improving the cleaning effect. In addition, a driving structure is provided, which can prevent the knocking mechanism from knocking on the filter plate when the filter plate is working normally, thereby avoiding damage to the filter plate caused by excessive knocking.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the overall structure of the present invention.

FIG. 2 is a schematic diagram of the structure of the present invention cut along the transverse direction.

FIG. 3 is a cutaway top view of the present invention.

FIG. 4 is a schematic diagram of the structure of the present invention cut along the longitudinal direction.

FIG. 5 is an enlarged structural schematic diagram of point A in FIG. 4 of the present invention.

FIG. 6 is a schematic diagram of the assembly structure of the magnet strip and the mounting ring of the present invention.

FIG. 7 is a schematic diagram of the structure of the first drive assembly and the third drive assembly of the present invention.

Reference numerals:

1. Frame; 11. Cylinder; 111. Air outlet; 112. Pre-filter chamber; 113. Post-filter chamber; 114. Recoil chamber; 115. Miscellaneous collection chamber; 12. Exhaust fan; 13. Filter plate; 21. Mounting plate; 22. Recoil plate; 221. Recoil hole; 23. Sealing plate; 231. Sealing strip; 24. Miscellaneous collection bag; 25. Square rod; 26. Motor; 27. Bevel gear; 28. Friction wheel; 31. Hollow rod; 311. Ventilation port; 32. Lifting plate; 33. Spring 1; 41. Knocking rod; 411. Ball; 412. Magnet block; 42. Mounting ring; 43. Magnet strip; 44. Spring 2; 45. Gear 1; 451. Bearing; 46. Gear ring; 47. Gear 2.

DETAILED DESCRIPTION

Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

As shown in FIG. 1 to FIG. 7 , a fume purification device for metal processing of the present invention comprises a frame 1, a cylinder 11, a filter plate 13, a cleaning mechanism, a first drive assembly and a second drive assembly.

The cylinder 11 is arranged above the frame 1, and an exhaust fan 12 is provided at the upper end of the cylinder 11 for drawing the smoke generated by metal processing into the cylinder 11. An air outlet 111 is opened on one side of the cylinder 11, and the air intake of the cylinder 11 is slightly larger than the air outlet at the air outlet 111. The filter plate 13 is arranged inside the cylinder 11, and the filter plate 13 is a cylindrical structure. The interior of the cylinder 11 is divided into a pre-filter chamber 112 and a post-filter chamber 113 by the filter plate 13.

Specifically, as shown in Figures 1 to 3, when the flue gas purification treatment device of the present invention is in use, the flue gas generated by metal processing is sucked into the cylinder 11 through the exhaust fan 12, the flue gas will enter the pre-filter chamber 112, and be filtered through the filter plate 13, the filtered gas will enter the post-filter chamber 113, and be discharged from the air outlet 111, and the impurities and particulate matter in the flue gas will be adhered to the inner peripheral side of the filter plate 13. When the filter plate 13 is blocked, the filter plate 13 can be cleaned by the cleaning mechanism.

The cleaning mechanism includes a mounting plate 21, a recoil plate 22 and a sealing plate 23, the recoil plate 22 and the sealing plate 23 are fixedly arranged at the upper end of the mounting plate 21, the recoil plate 22 is arranged on one side of the filter plate 13 close to the inner wall of the cylinder 11, and a recoil chamber 114 is formed between the recoil plate 22 and the filter plate 13, the sealing plate 23 is arranged on the other side of the filter plate 13, and a debris collecting chamber 115 is formed between the sealing plate 23 and the filter plate 13, the recoil plate 22 and the sealing plate 23 are arranged correspondingly, a plurality of recoil holes 221 are opened on the recoil plate 22 along its height direction, the lower end of the mounting plate 21 is connected with a debris collecting bag 24 corresponding to the position of the debris collecting chamber 115, the first driving component is arranged on the frame 1, and can drive the mounting plate 21 to rotate, and the second driving component is arranged at the lower end of the cylinder 11, and can drive the mounting plate 21 to automatically adjust the speed.

Specifically, as shown in Figures 1 to 6, since the air intake of the cylinder 11 is slightly greater than the air outlet at the air outlet 111, the smoke will accumulate inside the cylinder 11, thereby increasing the pressure inside the cylinder 11. At this time, the gas in the post-filter chamber 113 will enter the recoil chamber 114 through the recoil hole 221 on the recoil plate 22, and recoil clean this part of the filter plate 13. Then the gas will pass through the filter plate 13 into the collection chamber 115 and be discharged from the lower end of the collection chamber 115, while the impurities and particulate matter adhering to the filter plate 13 will fall off the filter plate 13 and fall along the collection chamber 115 into the collection bag 24 for collection. In this process, the first drive component drives the The movable mounting plate 21 rotates, which can drive the recoil plate 22 and the sealing plate 23 to rotate synchronously, so that the recoil plate 22 and the sealing plate 23 rotate along the circumferential direction of the filter plate 13, and the filter plate 13 is gradually backwashed and cleaned, thereby improving the damage to the filter plate 13 that may be caused by the brushing method, extending the service life of the filter plate 13, and allowing the impurities and particulate matter detached from the filter plate 13 to be discharged from the cylinder 11 to avoid clogging the filter plate 13 again. In addition, the rotation speed of the mounting plate 21 can be adjusted by the second driving component, so that the more serious the blockage of the filter plate 13, the faster the rotation speed of the mounting plate 21, that is, the faster the cleaning speed of the filter plate 13, so as to ensure the cleaning efficiency of the filter plate 13.

In some embodiments, a square rod 25 is provided at the lower end of the cylinder 11, the square rod 25 passes through the mounting plate 21 and is slidably connected to the mounting plate 21, and the square rod 25 can rotate synchronously with the mounting plate 21. The first driving assembly includes a motor 26, a bevel gear 27 and a friction wheel 28. The motor 26 is provided on the frame 1, the bevel gear 27 is connected to the output end of the motor 26, and the friction wheel 28 is connected to the lower end of the square rod 25. The bevel gear 27 and the friction wheel 28 are frictionally transmitted.

Specifically, as shown in Figures 1, 3, 4 and 7, when the starting motor 26 drives the bevel gear 27 to rotate, the friction transmission between the bevel gear 27 and the friction wheel 28 can drive the friction wheel 28 to rotate, thereby driving the square rod 25 connected to the friction wheel 28 to rotate. During the rotation of the square rod 25, the mounting plate 21 can be driven to rotate synchronously, thereby driving the recoil plate 22 and the sealing plate 23 to rotate synchronously, so as to gradually backflush and clean the filter plate 13 along the circumference of the filter plate 13.

In some embodiments, the second driving assembly includes a hollow rod 31 disposed in the cylinder 11, and a lifting plate 32 movably disposed in the hollow rod 31, a plurality of ventilation holes 311 are opened on the outer peripheral side of the hollow rod 31, the lifting plate 32 is connected to the upper end of the square rod 25, and a spring 33 is connected between the lifting plate 32 and the mounting plate 21.

Specifically, as shown in Figures 2 to 7, when the filter plate 13 is seriously blocked, the gas entering the filter post-chamber 113 from the filter pre-chamber 112 will decrease, so that the pressure in the filter pre-chamber 112 will further increase. At this time, the lifting plate 32 will move downward under the action of the pressure, and drive the square rod 25 and the friction wheel 28 to move downward synchronously, so as to change the position of the contact point between the friction wheel 28 and the bevel gear 27, thereby changing the transmission ratio between the friction wheel 28 and the bevel gear 27, so that the speed of the bevel gear 27 is increased. When the filter plate 13 remains unchanged, the rotation speed of the friction wheel 28 becomes faster, thereby making the rotation speed of the mounting plate 21 faster, that is, the more serious the blockage of the filter plate 13 is, the faster the rotation speed of the mounting plate 21 is, so that the cleaning mechanism cleans the filter plate 13 faster to ensure the cleaning efficiency of the filter plate 13. When the filter plate 13 is cleaned, the gas accumulated in the pre-filter chamber 112 will enter the post-filter chamber 113 through the filter plate 13, so that the pressure in the pre-filter chamber 112 is reduced, and the lifting plate 32 can be reset under the action of the spring 1 33.

As shown in Figures 2 to 4, sealing strips 231 are provided at both ends of the sealing plate 23 where they contact the filter plate 13, so as to ensure that the gas in the pre-filter chamber 112 cannot directly enter the impurity collecting chamber 115. At this time, one side of the impurity collecting chamber 115 is connected with the post-filter chamber 113 through the filter plate 13, and the lower end of the impurity collecting chamber 115 is connected with the outside through the impurity collecting bag 24. Since the air intake of the cylinder 11 is greater than the air output at the air outlet 111, the pressure inside the cylinder 11 is greater than that of the outside, so that the gas in the post-filter chamber 113 can enter the impurity collecting chamber 115 through the filter plate 13, and the filter plate 13 is backblown and cleaned in the process.

When the filter plate 13 is severely clogged, the flue gas will accumulate in the pre-filter chamber 112, causing the pressure in the pre-filter chamber 112 to gradually increase, while the gas in the post-filter chamber 113 will gradually be discharged from the air outlet 111, causing the pressure in the post-filter chamber 113 to gradually decrease, thereby causing the backwash cleaning effect of the gas in the post-filter chamber 113 on the filter plate 13 to gradually weaken, affecting the cleaning effect of the filter plate 13. Therefore, in some embodiments, the flue gas purification device of the present invention also includes a knocking mechanism, the knocking mechanism includes a knocking rod 41 and a third driving assembly for driving the knocking rod 41 to move, the knocking rod 41 is provided in plurality, and the plurality of knocking rods 41 are spaced apart along the height direction of the recoil plate 22, each knocking rod 41 penetrates the recoil plate 22 and is slidably connected to the recoil plate 22, and a sphere 411 is connected to one end of each knocking rod 41 facing the filter plate 13.

Specifically, as shown in Figures 3 to 6, when the filter plate 13 is severely clogged, the back-blowing cleaning effect of the cleaning mechanism on the filter plate 13 may be weakened. At this time, the knocking rod 41 can be driven to move by the third driving assembly so that the ball 411 on the knocking rod 41 can knock on the filter plate 13, so that impurities and particulate matter adhering to the filter plate 13 can fall off under the knocking action, thereby ensuring the cleaning effect of the filter plate 13.

In some embodiments, the third driving assembly includes a mounting ring 42 and a plurality of magnet strips 43 disposed on the mounting ring 42. The mounting ring 42 is rotatably disposed at the lower end of the cylinder 11, and the mounting ring 42 is rotatably sleeved on the outer side of the mounting plate 21. The plurality of magnet strips 43 are arranged along the circumference of the mounting ring 42, and each magnet strip 43 is located in the post-filter cavity 113. A magnet block 412 is provided at one end of each knocking rod 41 away from the sphere 411, and the magnet block 412 and the magnet strip 43 can attract each other. A spring 2 44 is connected between each magnet block 412 and the recoil plate 22, and the spring 2 44 is sleeved on the outer side of the corresponding knocking rod 41.

Specifically, as shown in Figures 3 to 7, when the mounting plate 21 is driven to rotate by the first driving component, the recoil plate 22 and the sealing plate 23 can be driven to rotate synchronously, and the multiple knocking rods 41 arranged on the recoil plate 22 can be driven to rotate synchronously. In the process of the knocking rod 41 rotating along the circumference of the filter plate 13, when the magnet block 412 connected to one end of the knocking rod 41 and the magnet bar 43 attract each other, the magnet block 412 will move toward the direction close to the magnet bar 43 through the tension spring 24, and drive the knocking rod 41 and the ball 411 to move synchronously. When the magnet block 412 passes over the magnet bar 43, the magnet block 412 can be pulled by the spring 24. During this process, the knocking rod 41 and the ball 411 can be driven to move toward the direction close to the filter plate 13 through the principle of simple harmonic vibration, so that the ball 411 can knock on the filter plate 13. In addition, since a plurality of magnet strips 43 are arranged along the circumference of the mounting ring 42, when the knocking rod 41 rotates along the circumference of the filter plate 13, the magnet block 412 at one end of the knocking rod 41 will attract the plurality of magnet strips 43 in turn, so that the ball 411 at the other end of the knocking rod 41 can intermittently knock on the filter plate 13, so that impurities and particulate matter adhering to the filter plate 13 fall off, thereby improving the cleaning effect of the filter plate 13.

It should be noted that each magnet bar 43 is inclined relative to the height direction of the cylinder 11, and multiple magnet bars 43 are inclined in the same direction along the circumference of the cylinder 11, so that when the knocking rod 41 rotates along the circumference of the filter plate 13, the magnet blocks 412 at one end of the multiple knocking rods 41 can be attracted to the same magnet bar 43 in sequence from top to bottom, thereby driving the balls 411 at the other end of the multiple knocking rods 41 to knock on the filter plate 13 in sequence from top to bottom, thereby avoiding damage to the filter plate 13 caused by multiple balls 411 knocking at the same time.

When the filter plate 13 is working normally, if the knocking rod 41 still knocks the filter plate 13, the filter plate 13 may be easily damaged. Therefore, in some embodiments, a driving structure is also provided at the lower end of the cylinder 11 to drive the mounting ring 42 to rotate synchronously with the mounting plate 21. The driving structure includes a gear 1 45, a gear ring 46 and a gear 2 47. The gear 1 45 is rotatably connected to the lower end of the mounting plate 21 through a bearing 451, the gear ring 46 is fixed to the lower end of the mounting ring 42, the gear 1 45 is meshed with the gear ring 46, the gear 2 47 is provided on the outer side of the square rod 25, and the gear 2 47 can mesh with the gear 1 45.

Specifically, as shown in Figures 2 to 7, during the normal operation of the filter plate 13, when the friction wheel 28 is driven to rotate by the first driving assembly, the square rod 25 and the gear 2 47 arranged on the outside of the square rod 25 can be driven to rotate synchronously, and the mounting plate 21 and the gear 1 45 arranged on the lower end of the mounting plate 21 can be driven to rotate synchronously. At this time, the gear 1 45 is meshed with the gear 2 47, so that the gear 1 45 cannot rotate on its own, so that the gear ring 46 can be meshed with the gear 1 45 and the gear ring 46. The gear 45 and the gear 46 rotate along the circumference of the filter plate 13, and drive the mounting ring 42 and the multiple magnet strips 43 arranged on the mounting ring 42 to rotate synchronously. In this process, since the mounting plate 21 and the mounting ring 42 rotate synchronously, the multiple knocking rods 41 and the magnet strips 43 on the recoil plate 22 can rotate synchronously, so that the magnet block 412 at one end of the knocking rod 41 will not attract each other with the magnet strip 43, so that the knocking rod 41 will not knock on the filter plate 13, avoiding damage to the filter plate 13 caused by excessive knocking; When serious blockage occurs, the lifting plate 32 will move downward under the action of pressure, and drive the square rod 25 and the gear 2 47 arranged on the outside of the square rod 25 to move downward synchronously, so that the gear 2 47 is disengaged from the gear 1 45. At this time, when the mounting plate 21 and the gear 1 45 arranged at the lower end of the mounting plate 21 are driven to rotate by the first driving component, since the gear 1 45 is disengaged from the gear 2 47, the gear 1 45 will rotate on its own instead of driving the gear ring 46 to rotate synchronously, so that the mounting ring 42 and the gear 1 45 arranged on the mounting ring 46 are disengaged. The multiple magnet bars 43 on 42 stop rotating. At this time, as the mounting plate 21 continues to rotate, the knocking rod 41 arranged on the recoil plate 22 will be driven to rotate relative to the magnet bar 43, so that the magnet block 412 at one end of the knocking rod 41 can attract each other with the magnet bar 43, and drive the knocking rod 41 to knock on the filter plate 13. By providing a driving structure, when the filter plate 13 is in a normal working state, the knocking mechanism will not knock on the filter plate 13, and the knocking mechanism will only knock on the filter plate 13 when the filter plate 13 is seriously blocked.

As shown in Figures 2 to 4, the impurities collecting bag 24 is provided with a microporous structure for gas to pass through, so that after the gas in the post-filter cavity 113 enters the impurities collecting cavity 115 through the filter plate 13, it can be discharged to the outside through the microporous structure on the impurities collecting bag 24, and the impurities and particulate matter that fall from the filter plate 13 will be collected in the impurities collecting bag 24.

Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims (9)

1. A fume purification device for metal processing, comprising a frame (1) and a barrel (11) arranged on the frame (1), an exhaust fan (12) being arranged at the upper end of the barrel (11), an air outlet (111) being arranged at one side of the barrel (11), a filter plate (13) being arranged inside the barrel (11), characterized in that the filter plate (13) is of a cylindrical structure, and the interior of the barrel (11) is divided into a pre-filter chamber (112) and a post-filter chamber (113) by the filter plate (13); The filter further comprises: a cleaning mechanism, the cleaning mechanism comprising a mounting plate (21), a recoil plate (22) and a sealing plate (23), the recoil plate (22) and the sealing plate (23) being arranged on the mounting plate (21), the recoil plate (22) being arranged on the outside of the filter plate (13), and a recoil chamber (114) being formed between the recoil plate (22) and the filter plate (13), the sealing plate (23) being arranged on the inside of the filter plate (13), and a debris collecting chamber (115) being formed between the sealing plate (23) and the filter plate (13), a plurality of recoil holes (221) being arranged on the recoil plate (22), a debris collecting bag (24) being connected to a position of the lower end of the mounting plate (21) corresponding to the debris collecting chamber (115), and an air intake volume of the cylinder (11) being slightly greater than an air output volume at the air outlet (111); A first driving assembly, the first driving assembly being arranged on the frame (1) and capable of driving the mounting plate (21) to rotate; A second drive assembly, the second drive assembly being arranged at the lower end of the cylinder (11) and capable of driving the mounting plate (21) to automatically adjust the rotation speed. 2. A fume purification device for metal processing according to claim 1, characterized in that a square rod (25) is provided at the lower end of the cylinder (11), the square rod (25) passes through the mounting plate (21) and is slidably connected to the mounting plate (21), and the square rod (25) can rotate synchronously with the mounting plate (21), the first driving component comprises a motor (26), a bevel gear (27) and a friction wheel (28), the motor (26) is provided on the frame (1), the bevel gear (27) is connected to the output end of the motor (26), the friction wheel (28) is connected to the lower end of the square rod (25), and the bevel gear (27) and the friction wheel (28) are frictionally driven. 3. A fume purification device for metal processing according to claim 2, characterized in that the second driving assembly comprises a hollow rod (31) arranged in the cylinder (11), and a lifting plate (32) movably arranged in the hollow rod (31), a plurality of ventilation holes (311) are opened on the hollow rod (31), the lifting plate (32) is connected to the upper end of the square rod (25), and a spring (33) is connected between the lifting plate (32) and the mounting plate (21). 4. A fume purification device for metal processing according to claim 1, characterized in that sealing strips (231) are provided at both ends of the sealing plate (23) where they contact the filter plate (13) to ensure that the gas in the pre-filter chamber (112) cannot directly enter the impurity collecting chamber (115). 5. A fume purification device for metal processing according to claim 3, characterized in that it also includes a knocking mechanism, the knocking mechanism includes a knocking rod (41) and a third driving component for driving the knocking rod (41) to move, the knocking rod (41) is arranged in plurality, and the plurality of knocking rods (41) are arranged at intervals along the height direction of the recoil plate (22), each of the knocking rods (41) penetrates the recoil plate (22) and is slidably connected to the recoil plate (22), and each of the knocking rods (41) is connected to a ball (411) at one end facing the filter plate (13). 6. A fume purification treatment device for metal processing according to claim 5, characterized in that the third driving assembly comprises a mounting ring (42) and a plurality of magnet bars (43) arranged on the mounting ring (42), the mounting ring (42) is rotatably arranged at the lower end of the cylinder (11), the mounting ring (42) is rotatably sleeved on the outer side of the mounting plate (21), the plurality of magnet bars (43) are arranged along the circumference of the mounting ring (42), and each magnet bar (43) is located in the post-filter cavity (113), each knocking rod (41) is provided with a magnet block (412) at one end away from the sphere (411), the magnet block (412) and the magnet bar (43) can attract each other, and each magnet block (412) and the recoil plate (22) are connected with a second spring (44), and the second spring (44) is sleeved on the outer side of the corresponding knocking rod (41). 7. A fume purification device for metal processing according to claim 6, characterized in that each of the magnet bars (43) is arranged to be inclined relative to the height direction of the cylinder (11), and the plurality of magnet bars (43) are inclined in the same direction along the circumference of the cylinder (11). 8. A metal processing fume purification device according to claim 6, characterized in that a driving structure is further provided at the lower end of the cylinder (11) for driving the mounting ring (42) to rotate synchronously with the mounting plate (21), the driving structure comprising a gear 1 (45), a gear ring (46) and a gear 2 (47), the gear 1 (45) being rotatably connected to the lower end of the mounting plate (21) via a bearing (451), the gear ring (46) being fixedly arranged at the lower end of the mounting ring (42), the gear 1 (45) being meshingly connected with the gear ring (46), the gear 2 (47) being arranged at the outer side of the square rod (25), the gear 2 (47) being meshingly connected with the gear 1 (45). 9. The metal processing fume purification device according to claim 1, characterized in that the collecting bag (24) is provided with a microporous structure for gas to pass through.