A pulse-jet flat bag dust collector with automatic protection nozzle

Abstract

The application discloses a kind of automatic protection nozzle's pulse spray flat bag dust collector, it is related to dust collector technical field, including dust removal box, dust removal box right side top is fixedly connected with gas outlet, dust removal box left side top is fixedly connected with air inlet, air inlet is fixedly connected with gas guide pipe near dust removal box one end, gas guide pipe is fixedly connected in dust removal box interior, gas guide pipe lower end equidistance fixedly connected with jet pipe, the inclination angle of each drainage plate can be changed simultaneously, to adjust the angle of compressed gas sprayed in jet pipe, not only can avoid the compressed gas sprayed by jet pipe and filter bag surface direct collision, reduce the wear and tear and damage risk of filter bag, so that jet flow is more gentle, reduce the impact force to filter bag, prolong the service life of filter bag, and prevent filter bag from being affected by the impact force of compressed gas and vibrating, damage the jet pipe, protect the jet pipe, improve the safety of jet pipe in working process.

Description

Technical Field

[0001] This invention relates to the field of dust collector technology, specifically to a pulse jet flat bag dust collector with automatic nozzle protection. Background Technology

[0002] Pulse jet flat bag dust collector is an industrial dust removal device that can be used to remove particulate matter, dust and flue gas generated in industrial production processes. It uses pulse technology to compress air and jet it onto the filter bags for multiple air filtration processes, thereby achieving dust removal.

[0003] However, when existing dust collectors compress and spray air onto the filter bags, operators need to manually adjust the angle of each nozzle to prevent the nozzle from tilting during operation. If the spray angle is too direct or impacts the filter bags too much, it will cause the filter bags to vibrate, be squeezed, or be impacted excessively. This will not only damage the structure and performance of the filter bags, reducing the filtration efficiency, but also cause the filtered particles inside the filter bags to spill out and fall into the dust collector, damaging the internal structure of the dust collector. Moreover, during the vibration of the filter bags, because the filter bags and nozzles are connected, the nozzles will vibrate synchronously, causing the nozzles to loosen or be damaged.

[0004] Secondly, when the nozzle compresses and sprays air containing particulate matter, dust, and fumes onto the fabric bag, the spray angle is generally fixed. This not only means that the nozzle can only concentrate on spraying a certain point or area, but also prevents it from contacting other areas of the fabric bag. As a result, different parts of the fabric bag are contaminated to different degrees, reducing the usability of the fabric bag. Moreover, the fixed-angle spraying causes the nozzle to continuously impact the designated area of ​​the fabric bag, increasing the risk of damage to the fabric bag.

[0005] Therefore, we propose a pulse jet flat bag dust collector with automatic nozzle protection to solve the above problems. Summary of the Invention

[0006] (a) Technical problems to be solved

[0007] To address the shortcomings of existing technologies, this invention provides a pulse jet flat bag dust collector with automatic nozzle protection, which effectively solves the problem that operators need to manually adjust the angle of each nozzle in existing technologies.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, the present invention can be accomplished through the following technical solutions:

[0010] A pulse-jet flat bag dust collector with automatic nozzle protection includes a dust collection box. An air outlet is fixedly connected to the upper right side of the dust collection box, and an air inlet is fixedly connected to the upper left side of the dust collection box. An air guide pipe is fixedly connected to one end of the air inlet near the dust collection box and is fixedly connected inside the dust collection box. Air jet pipes are fixedly connected at equal intervals to the lower end of the air guide pipes. Filter bags are fixedly connected to the lower ends of the air jet pipes and are fixedly connected inside the dust collection box. An air jet angle adjustment mechanism is provided between the air jet pipes and the dust collection box. The air jet angle adjustment mechanism controls the angle of gas ejection from the air jet pipes. An intermittent control mechanism is provided on the air jet angle adjustment mechanism. The intermittent control mechanism includes a mounting frame fixedly connected to the upper surface of the dust collection box and is used to intermittently operate the air jet angle adjustment mechanism.

[0011] As a further embodiment of the present invention: the jet angle adjustment mechanism includes a lifting plate, and connecting rods are fixedly connected at equal intervals on the lower end face of the lifting plate. The connecting rods are all slidably connected between the dust collector and the air duct. The connecting rods are all located inside the jet pipe. Limiting blocks are slidably connected to the outer surface of the connecting rods. Connecting blocks are fixedly connected to the four corners of the limiting blocks. The connecting blocks are all fixedly connected to the inner wall of the jet pipe. The upper end face of the connecting blocks is an inclined surface.

[0012] As a further embodiment of the present invention: a fixing block is fixedly connected to the lower end of the connecting rod, and an extension plate is slidably connected through the side wall of the fixing block. The extension plates are alternately distributed among each other, and a diversion plate is rotatably connected to the upper surface of each extension plate. The end of the diversion plate away from the extension plate is rotatably connected to the side wall of the limiting block.

[0013] As a further embodiment of the present invention: a lifting plate is rotatably connected to both the left and right sides of the lifting plate, and a sliding plate is rotatably connected to the end of the lifting plate away from the lifting plate. The sliding plates are slidably connected to the upper surface of the dust removal box, and a connecting plate is fixedly connected between the upper surfaces of the sliding plates.

[0014] As a further embodiment of the present invention: a through groove is provided at the center of the connecting plate, a connecting column is slidably connected in the through groove, a lever is fixedly connected to the upper end of the connecting column, a rotating shaft is fixedly connected to the upper end face of the lever, and the rotating shaft is rotatably connected to the mounting frame.

[0015] As a further embodiment of the present invention: a drive shaft is rotatably connected to the upper end face of the mounting bracket, a drive source is fixedly connected to the upper end of the drive shaft, a sector gear is fixedly connected to the outer surface of the drive shaft, a transmission gear is meshed with the rear side of the sector gear, and the transmission gear is fixedly connected to the outer surface of the rotating shaft.

[0016] As a further embodiment of the present invention: a ratchet is fixedly connected to the outer surface of the rotating shaft, the ratchet is located below the transmission gear, a pawl is attached to the front side of the ratchet, and the pawl is rotatably connected to the upper end face of the mounting bracket.

[0017] As a further aspect of the present invention: a torsion spring is fixedly connected to the upper end face of the mounting bracket, and the end of the torsion spring away from the mounting bracket is fixedly connected to the pawl.

[0018] (III) Beneficial Effects

[0019] Compared with the prior art, the present invention provides a pulse jet flat bag dust collector with automatic nozzle protection, which has the following beneficial effects:

[0020] 1. When the lifting plate is driven to rise, the tilt angle of each guide plate can be changed simultaneously through the connecting rod, fixing block and limiting block. This adjusts the angle of the compressed gas ejected from the jet pipe, which not only avoids direct collision between the compressed gas ejected from the jet pipe and the surface of the filter bag, reducing the risk of wear and damage to the filter bag, but also makes the jet airflow smoother, reducing the impact force on the filter bag and extending the service life of the filter bag. Furthermore, it prevents the filter bag from vibrating due to the impact force of the compressed gas, thus protecting the jet pipe and improving its safety during operation.

[0021] 2. The jet angle adjustment mechanism can drive the lifting plate to move up and down repeatedly according to the needs of the staff, thereby constantly adjusting the angle of the guide plate. This ensures that the compressed air in the jet pipe is evenly sprayed onto all parts of the filter bag, which not only avoids over-spraying or under-spraying, reducing unnecessary energy consumption and improving energy efficiency, but also distributes the jet airflow more evenly on the surface of the filter bag, resulting in a more comprehensive cleaning effect.

[0022] 3. Through the intermittent control mechanism, the rotating shaft can be driven intermittently, allowing the compressed air to pause at various angles. This not only balances the cleaning force and ensures that each part of the filter bag is properly cleaned, but also better adapts to different filter bag layouts, ensuring that each filter bag is properly cleaned and fully utilizing the function of the dust collector. Attached Figure Description

[0023] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 For the present invention Figure 1 Enlarged structural diagram of region A in the middle;

[0026] Figure 3 This is a schematic diagram of the internal structure of the dust collector box of the present invention;

[0027] Figure 4 This is a schematic diagram of the connection structure of the jet angle adjustment mechanism of the present invention;

[0028] Figure 5 This is a schematic diagram of the connection structure between the rotating shaft and the mounting bracket of the present invention;

[0029] Figure 6 This is a schematic diagram of the connection structure between the connecting rod and the air guide tube of the present invention;

[0030] Figure 7 This is a schematic diagram of the internal structure of the jet pipe of the present invention;

[0031] Figure 8 This is a partial structural diagram of the jet pipe in this invention.

[0032] In the diagram: 1. Dust collector; 2. Air inlet; 3. Air outlet;

[0033] 4. Jet angle adjustment mechanism; 401. Rotary shaft; 402. Lever; 403. Connecting column; 404. Connecting plate; 405. Through slot; 406. Lifting plate; 407. Connecting rod; 408. Slide plate; 409. Lifting plate; 410. Fixing block; 411. Limiting block; 412. Connecting block; 413. Drainage plate; 414. Extension plate;

[0034] 5. Intermittent control mechanism; 501. Mounting bracket; 502. Drive shaft; 503. Sector gear; 504. Transmission gear; 505. Ratchet; 506. Pad; 507. Torsion spring;

[0035] 6. Air duct; 7. Air jet pipe; 8. Filter bag. Detailed Implementation

[0036] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] This embodiment describes a pulse-jet flat bag dust collector with automatic nozzle protection, such as... Figure 1 - Figure 8As shown, the system includes a dust collector 1. An air outlet 3 is fixedly connected to the upper right side of the dust collector 1, and an air inlet 2 is fixedly connected to the upper left side of the dust collector 1. An air guide pipe 6 is fixedly connected to one end of the air inlet 2 near the dust collector 1. The air guide pipe 6 is fixedly connected inside the dust collector 1. An air jet pipe 7 is fixedly connected at equal intervals to the lower end of the air guide pipe 6. A filter bag 8 is fixedly connected to the lower end of each air jet pipe 7. The filter bags 8 are all fixedly connected inside the dust collector 1. An air jet angle adjustment mechanism 4 is provided between the air jet pipe 7 and the dust collector 1. The air jet angle adjustment mechanism 4 is used to control the angle at which the gas inside the air jet pipe 7 is ejected.

[0038] In this embodiment, as Figure 4 and Figure 6 - Figure 8 As shown, the jet angle adjustment mechanism 4 includes a lifting plate 406. The lower end face of the lifting plate 406 is equidistantly connected to connecting rods 407. The connecting rods 407 are all slidably connected between the dust collector box 1 and the air guide pipe 6. The connecting rods 407 are all located inside the jet pipe 7. The outer surface of the connecting rods 407 is slidably connected to a limiting block 411. A connecting block 412 is fixedly connected to each of the four corners of the limiting block 411. The connecting blocks 412 are all fixedly connected to the inner wall of the jet pipe 7. The upper end face of the connecting blocks 412 is inclined. By using the inclined upper end face of the connecting blocks 412, the compressed gas ejected from the jet pipe 7 can be evenly guided to the guide plate 413 between the connecting blocks 412.

[0039] In this embodiment, as Figure 6 - Figure 8 As shown, a fixed block 410 is fixedly connected to the lower end of the connecting rod 407. An extension plate 414 is slidably connected through the side wall of the fixed block 410. The extension plates 414 are alternately distributed. A diversion plate 413 is rotatably connected to the upper surface of the extension plate 414. The end of the diversion plate 413 away from the extension plate 414 is rotatably connected to the side wall of the limiting block 411. During the process of the connecting rod 407 driving the fixed block 410 to rise and approach the limiting block 411, the extension plate 414 can push the diversion plate 413 to rotate on the side wall of the limiting block 411, thereby changing the tilt angle of the diversion plate 413.

[0040] In this embodiment, as Figure 4 As shown, lifting plates 409 are rotatably connected to both the left and right sides of the lifting plate 406. Slide plates 408 are rotatably connected to the end of the lifting plate 409 away from the lifting plate 406. Slide plates 408 are slidably connected to the upper surface of the dust collection box 1. A connecting plate 404 is fixedly connected between the upper surfaces of the slide plates 408. When the slide plates 408 slide back and forth on the upper surface of the dust collection box 1, the lifting plate 406 can be driven to move up and down back and forth through the lifting plate 409.

[0041] In this embodiment, as Figure 2As shown, a through groove 405 is provided at the center of the connecting plate 404. A connecting post 403 is slidably connected in the through groove 405. A lever 402 is fixedly connected to the upper end of the connecting post 403. A rotating shaft 401 is fixedly connected to the upper end face of the lever 402. The rotating shaft 401 is rotatably connected to the mounting bracket 501. When the rotating shaft 401 rotates, the lever 402 can drive the connecting post 403 to slide back and forth in the through groove 405, and move the connecting plate 404 back and forth.

[0042] The effect achieved here is as follows: In existing technology, operators need to manually adjust the angle of each nozzle to prevent the air jet from tilting during operation. If the jet angle is too direct or impacts the filter bag too much, it will cause excessive vibration, compression, or impact to the filter bag. This will not only damage the structure and performance of the filter bag, reducing its filtration efficiency, but also cause the filtered particles inside the filter bag to spill out and fall into the dust collector, damaging its internal structure. Furthermore, during the vibration of the filter bag, because the filter bag and nozzle are connected, the nozzle will vibrate synchronously, causing the nozzle... In the event of loosening or damage, compared with the prior art, the tilt angle of each guide plate 413 can be changed simultaneously to adjust the angle of the compressed gas ejected from the jet pipe 7. This not only avoids direct collision between the compressed gas ejected from the jet pipe 7 and the surface of the filter bag 8, reducing the risk of wear and damage to the filter bag 8, but also makes the jet airflow smoother, reducing the impact force on the filter bag 8 and extending the service life of the filter bag 8. Furthermore, it prevents the filter bag 8 from vibrating due to the impact force of the compressed gas, thus protecting the jet pipe 7 and improving its safety during operation.

[0043] Secondly, the lifting plate 406 can be driven to move up and down repeatedly according to the needs of the staff, and the angle of the diversion plate 413 can be adjusted at all times so that the compressed air in the jet pipe 7 can be evenly sprayed on all parts of the filter bag 8. This not only avoids over-spraying or under-spraying, reducing unnecessary energy consumption and improving energy utilization efficiency, but also makes the jet airflow more evenly distributed on the surface of the filter bag 8, resulting in a more comprehensive cleaning effect.

[0044] At other levels, this embodiment also provides an intermittent control mechanism 5 for intermittently operating the jet angle adjustment mechanism 4, such as... Figure 1 , Figure 2 and Figure 5As shown, the intermittent control mechanism 5 includes a mounting bracket 501, which is fixedly connected to the upper surface of the dust collector 1. A drive shaft 502 is rotatably connected to the upper surface of the mounting bracket 501. A drive source is fixedly connected to the upper end of the drive shaft 502. A sector gear 503 is fixedly connected to the outer surface of the drive shaft 502. A transmission gear 504 is meshed with the rear side of the sector gear 503. The transmission gear 504 is fixedly connected to the outer surface of the rotating shaft 401.

[0045] In this embodiment, as Figure 5 As shown, a ratchet 505 is fixedly connected to the outer surface of the rotating shaft 401. The ratchet 505 is located below the transmission gear 504. A pawl 506 is attached to the front side of the ratchet 505. The pawl 506 is rotatably connected to the upper end face of the mounting bracket 501. By limiting each other between the pawl 506 and the ratchet 505, the rotating shaft 401 can be prevented from reversing.

[0046] In this embodiment, as Figure 5 As shown, a torsion spring 507 is fixedly connected to the upper end face of the mounting bracket 501. The end of the torsion spring 507 away from the mounting bracket 501 is fixedly connected to the pawl 506. Through the torsion spring 507, the pawl 506 and the ratchet 505 are always pushed to fit together during the normal rotation of the ratchet 505 driven by the rotating shaft 401.

[0047] The effect achieved here is as follows: Compared with the existing technology, the rotating shaft 401 can be driven intermittently to rotate, so that the compressed air is sprayed and paused at various angles. This not only balances the cleaning force and ensures that each position of the filter bag 8 is properly cleaned, but also better adapts to different filter bag 8 layouts, ensuring that each filter bag 8 is properly cleaned, and giving full play to the role of the dust collector.

[0048] The overall working process and principles involved in the above embodiments are as follows:

[0049] First working status:

[0050] Before using the dust collector 1 to filter particulate matter, dust, and flue gas, the operator can manually drive the rotating shaft 401 to rotate on the mounting bracket 501. The lever 402 connected to the lower end of the rotating shaft 401 will then move the connecting column 403 synchronously around the rotating shaft 401. As the connecting column 403 moves, it slides within the through slot 405 on the connecting plate 404, simultaneously causing the connecting plate 404 to follow the movement of the connecting column 403, thus driving the sliding plate connected to the lower end of the connecting plate 404. 408 slides backward from the front of the upper end of the dust collector 1, pushing the lifting plate 409 connected to the upper end of the sliding plate 408 from an inclined position to a vertical position. At this time, as the state of the lifting plate 409 changes, the lifting plate 406 can drive the connecting rod 407 to slide out from the inside of the dust collector 1 simultaneously, driving the connecting rod 407 to slide upward on the limiting block 411, and at the same time driving the fixed block 410 to rise and approach the limiting block 411. As the fixed block 410 approaches the limiting block 411, it can simultaneously drive the side wall of the fixed block 410. The extension plate 414, which is slidably connected to the upper part of the extension plate 414, rises, pushing the lower end of the guide plate 413, which is rotatably connected to the upper end of the extension plate 414, to rise synchronously. This drives the guide plate 413 to move from a near-vertical position to an inclined position. As the guide plate 413 changes position, it can move the extension plate 414 out of the fixed block 410 to support the guide plate 413. At this time, when the jet pipe 7 sprays compressed air, the air will flow along the inclined surface of the guide plate 413, thereby adjusting the angle of the compressed gas sprayed in the jet pipe 7. This not only... To avoid direct collision between the compressed gas ejected from the jet pipe 7 and the surface of the filter bag 8, reducing the risk of wear and damage to the filter bag 8, making the jet airflow smoother, reducing the impact force on the filter bag 8, extending the service life of the filter bag 8, and preventing the filter bag 8 from vibrating due to the impact force of the compressed gas, thus protecting the jet pipe 7 and improving its safety during operation, the dust collection box 1 can be opened for operation after the tilt angle of the guide plate 413 is adjusted.

[0051] Second working state:

[0052] When the operator drives the rotating shaft 401 to rotate continuously, the lever 402, connecting column 403, through slot 405 and connecting plate 404 can drive the sliding plate 408 to slide back and forth in front of the upper end of the dust collection box 1, pushing the lifting plate 409 to switch back and forth between inclined and vertical positions, driving the lifting plate 406, connecting rod 407 and fixing block 410 to move up and down. At this time, with the reciprocating movement of the fixing block 410, the tilt angle of the guide plate 413 connected to the extension plate 414 and the limiting block 411 will also change back and forth, so that the compressed air in the jet pipe 7 can be evenly sprayed on all parts of the filter bag 8. This not only avoids over-spraying or under-spraying, reducing unnecessary energy consumption and improving energy utilization efficiency, but also makes the jet airflow more evenly distributed on the surface of the filter bag 8, making the cleaning effect more comprehensive.

[0053] When the operator drives the drive shaft 502 to rotate on the mounting frame 501 via the drive source, the drive shaft 502 will synchronously drive the sector gear 503 to rotate. The sector gear 503 and the transmission gear 504 mesh and connect, which can intermittently rotate the rotating shaft 401 on the mounting frame 501 continuously in the same direction. This allows the compressed air to stop at various angles, which not only balances the cleaning force and ensures that each position of the filter bag 8 is properly cleaned, but also better adapts to different filter bag 8 layouts, ensuring that each filter bag 8 is properly cleaned, and giving full play to the function of the dust collector.

[0054] When the rotating shaft 401 rotates intermittently in the same direction, there will be a gap between the sector gear 503 and the transmission gear 504 as the sector gear 503 is working. At this time, if the rotating shaft 401 is affected by external factors, such as wind, it will rotate in the opposite direction. When the rotating shaft 401 rotates in the opposite direction, it will drive the ratchet 505 to rotate in the opposite direction. However, the ratchet 505 is limited by the pawl 506 and cannot rotate in the opposite direction. This avoids the situation where the rotating shaft 401 rotates in the opposite direction due to external factors when the sector gear 503 is separated from the transmission gear 504.

[0055] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A pulse jet flat bag dust collector with automatic nozzle protection, comprising a dust collection box (1), wherein an air outlet (3) is fixedly connected to the upper right side of the dust collection box (1), and an air inlet (2) is fixedly connected to the upper left side of the dust collection box (1). An air guide pipe (6) is fixedly connected to one end of the air inlet (2) near the dust collection box (1), and the air guide pipe (6) is fixedly connected inside the dust collection box (1). Air jet pipes (7) are fixedly connected at equal intervals at the lower end of the air guide pipe (6), and filter bags (8) are fixedly connected to the lower ends of each air jet pipe (7). All filter bags (8) are fixedly connected inside the dust collection box (1). The dust collection box (1) is characterized in that: An air jet angle adjustment mechanism (4) is provided between the jet pipe (7) and the dust collection box (1). The jet angle adjustment mechanism (4) is used to control the angle at which the gas inside the jet pipe (7) is ejected. An intermittent control mechanism (5) is provided on the jet angle adjustment mechanism (4). The intermittent control mechanism (5) includes a mounting bracket (501), which is fixedly connected to the upper end face of the dust collection box (1). The intermittent control mechanism (5) is used to intermittently operate the jet angle adjustment mechanism (4). The jet angle adjustment mechanism (4) includes a lifting plate (406), and connecting rods (407) are fixedly connected at equal intervals on the lower end face of the lifting plate (406). The connecting rods (407) are all slidably connected between the dust collector (1) and the air duct (6). The connecting rods (407) are all located inside the jet pipe (7). Limiting blocks (411) are slidably connected to the outer surface of the connecting rods (407). Connecting blocks (412) are fixedly connected at the four corners of the limiting blocks (411). The connecting blocks (412) are all fixedly connected to the inner wall of the jet pipe (7). The upper end face of the connecting blocks (412) is an inclined surface.

2. The pulse-jet flat bag dust collector with automatic nozzle protection according to claim 1, characterized in that, The lower end of the connecting rod (407) is fixedly connected to a fixing block (410). An extension plate (414) is slidably connected through the side wall of the fixing block (410). The extension plates (414) are alternately distributed. A diversion plate (413) is rotatably connected to the upper surface of the extension plate (414). The end of the diversion plate (413) away from the extension plate (414) is rotatably connected to the side wall of the limiting block (411).

3. A pulse-jet flat bag dust collector with automatic nozzle protection according to claim 1, characterized in that, The lifting plate (406) is rotatably connected to the left and right sides of the lifting plate (409). The end of the lifting plate (409) away from the lifting plate (406) is rotatably connected to the sliding plate (408). The sliding plates (408) are slidably connected to the upper surface of the dust collection box (1). A connecting plate (404) is fixedly connected between the upper surfaces of the sliding plates (408).

4. A pulse-jet flat bag dust collector with automatic nozzle protection according to claim 3, characterized in that, A through groove (405) is provided at the center of the connecting plate (404). A connecting column (403) is slidably connected in the through groove (405). A lever (402) is fixedly connected to the upper end of the connecting column (403). A rotating shaft (401) is fixedly connected to the upper end face of the lever (402). The rotating shaft (401) is rotatably connected to the mounting bracket (501).

5. A pulse-jet flat bag dust collector with automatic nozzle protection according to claim 4, characterized in that, The upper end face of the mounting bracket (501) is rotatably connected to a drive shaft (502), the upper end of the drive shaft (502) is fixedly connected to a drive source, the outer surface of the drive shaft (502) is fixedly connected to a sector gear (503), the rear side of the sector gear (503) is meshed with a transmission gear (504), and the transmission gear (504) is fixedly connected to the outer surface of the rotating shaft (401).

6. A pulse-jet flat bag dust collector with automatic nozzle protection according to claim 5, characterized in that, A ratchet (505) is fixedly connected to the outer surface of the rotating shaft (401). The ratchet (505) is located below the transmission gear (504). A pawl (506) is attached to the front side of the ratchet (505). The pawl (506) is rotatably connected to the upper end face of the mounting bracket (501).

7. A pulse-jet flat bag dust collector with automatic nozzle protection according to claim 6, characterized in that, A torsion spring (507) is fixedly connected to the upper end face of the mounting bracket (501), and the end of the torsion spring (507) away from the mounting bracket (501) is fixedly connected to the pawl (506).

Images