A back flushing dust removal device
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2026-07-06
- Publication Date
- 2026-08-11
Smart Images
Figure CN224613413U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of industrial dust removal equipment technology, and in particular to a reverse-flushing dust removal device. Background Technology
[0002] Industrial production and processing processes generate a large amount of dust and waste gas. Direct dust emissions will pollute the factory environment and harm the health of operators. At the same time, dust accumulation can easily cause equipment pipeline blockage, accelerated wear, and reduced equipment lifespan. Therefore, it is necessary to install dust removal devices to purify and treat dust-laden gases.
[0003] Traditional baghouse dust collectors mostly use a fixed-position pulse backflushing structure with fixed backflushing nozzles, which can only clean the upper part of the dust collector bag. Dust adhering to the middle and lower parts of the bag is difficult to clean thoroughly. Long-term use will cause bag blockage, increased ventilation resistance, and a continuous decline in dust collection efficiency. Moreover, conventional backflushing structures lack auxiliary vibration cleaning structures. Dust clumps have strong adhesion and cannot be peeled off by airflow alone, resulting in poor cleaning effect. In addition, existing equipment backflushing pipelines lack a synchronous telescopic adjustment structure, which cannot adapt to dust collector bags of different lengths and specifications. The equipment has poor versatility, and the manual disassembly and cleaning of the bags is labor-intensive and cannot meet the dust collection needs of long-term continuous industrial production.
[0004] Therefore, it is essential to provide a reverse-flushing dust removal device to address the shortcomings of existing technologies. Utility Model Content
[0005] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a reverse-blowing dust removal device. This invention uses a synchronously retractable reverse-blowing pipeline combined with a reverse-blowing head assembly with a vibration structure to move and blow along the entire length of the dust collector bag. The combined effect of airflow impact and vibration removes the clumps of dust from the bag, resulting in thorough cleaning. In non-cleaning conditions, the entire reverse-blowing mechanism can be completely stored inside the extension box, without occupying the airflow space inside the dust collector housing, thus avoiding interference with normal filtration airflow. Multiple sets of synchronous reverse-blowing structures enable simultaneous cleaning of multiple bags. The telescopic cylinder and the reverse-blowing pipeline are arranged in parallel, ensuring strong motion synchronization and high equipment versatility. This significantly reduces the probability of bag clogging, extends the service life of the dust collector bags, reduces the frequency of manual maintenance, and meets the needs of continuous industrial dust removal operations.
[0006] The above-mentioned objectives of this utility model are achieved through the following technical means.
[0007] A reverse-flushing dust removal device is provided, including a support base, a dust removal housing installed on the support base, an exhaust pipe connected to the top of the dust removal housing, an air inlet pipe connected to one side of the bottom of the dust removal housing, a dust collection trough movably installed through the support base at the bottom of the dust removal housing, an extension box installed on one side of the dust removal housing, a reverse-flushing mechanism and a telescopic drive mechanism installed inside the extension box, an air pump installed outside the extension box, and the air pump connected to a reverse-flushing pipe. The back-blowing mechanism includes four sets of back-blowing tubes, which are installed in the upper part of the extension box. One end of each set of back-blowing tubes is connected to an air pump, and the other end of each set of back-blowing tubes is movably and sealed to four sets of telescopic air guides. The four sets of telescopic air guides extend into the dust collector housing, and each set of telescopic air guides has a back-blowing head assembly at its bottom.
[0008] Specifically, the telescopic drive mechanism includes two sets of telescopic cylinders, which are installed in the lower half of the extension box. The telescopic cylinders extend into the dust collector housing. Each set of telescopic cylinders has a connecting rod at its end. A support cross plate is welded between the connecting rods of the two sets of telescopic cylinders. The support cross plate is welded to the bottom of the four sets of telescopic air guide pipes to drive the telescopic air guide pipes to move in and out.
[0009] Specifically, a partition plate is horizontally installed inside the dust collector housing, and bag slots are evenly opened on the partition plate, with dust collector bags installed in the bag slots.
[0010] Specifically, the backflush head assembly includes a vertical air guide tube, one end of which is connected to the bottom of a telescopic air guide tube, and a conical nozzle is installed at the other end of the vertical air guide tube. A vertical connecting rod is installed inside the conical nozzle, and a vibrating head is rotatably installed at the end of the vertical connecting rod. An air vent is provided in the center of the vibrating head.
[0011] Specifically, the conical nozzle and the vibrating head are coaxially installed, and the positions of the annular air vents on the conical nozzle and the vibrating head correspond to each other. The conical nozzle and the vibrating head are vertically installed directly above the dust collector bag.
[0012] Specifically, the maximum extension stroke of the telescopic cylinder is matched with the total length of the backflush tube and the telescopic air guide tube, and the telescopic cylinder and the backflush tube are installed parallel to each other vertically.
[0013] This invention utilizes a synchronously retractable back-blowing pipeline combined with a back-blowing head assembly featuring a vibration structure. This allows for sweeping along the entire length of the dust collector bag, combining the impact of airflow with vibration to remove clumps of dust from the bag, resulting in thorough cleaning. In non-cleaning conditions, the entire back-blowing mechanism can be completely retracted into the extension box, without occupying the internal airflow space of the dust collector housing, thus avoiding interference with normal filtration airflow. Multiple synchronous back-blowing structures enable simultaneous cleaning of multiple bags. The parallel matching arrangement of the telescopic cylinder and back-blowing pipeline ensures strong motion synchronization, high equipment versatility, significantly reduces the probability of bag clogging, extends the service life of the dust collector bags, reduces the frequency of manual maintenance, and meets the needs of continuous industrial dust removal operations. Attached Figure Description
[0014] The present invention will be further described with reference to the accompanying drawings, but the content of the drawings does not constitute any limitation on the present invention.
[0015] Figure 1 This is a three-dimensional view of the overall structure of a reverse-flushing dust removal device according to this utility model.
[0016] Figure 2 This is a front view of a reverse-flushing dust removal device according to this utility model.
[0017] Figure 3 This is a schematic diagram of the back-blowing mechanism in a back-blowing dust removal device of this utility model.
[0018] Figure 4 This is a schematic diagram of the telescopic drive mechanism in a reverse-blowing dust removal device of this utility model.
[0019] Figure 5 This is a schematic diagram of the structure of the back-blowing head assembly in a back-blowing dust removal device according to this utility model.
[0020] from Figures 1 to 5 Including: 1. Support base; 2. Dust collector housing; 3. Exhaust pipe; 4. Inlet pipe; 5. Dust collection trough; 6. Extension box; 7. Back-blowing mechanism; 8. Telescopic drive mechanism; 9. Air pump; 10. Back-blowing connecting pipe; 11. Back-blowing thin pipe; 12. Telescopic air guide pipe; 13. Back-blowing head assembly; 14. Telescopic cylinder; 15. Connecting rod; 16. Support horizontal plate; 17. Spacing plate; 18. Bag slot; 19. Dust collector bag; 20. Vertical air guide pipe; 21. Conical nozzle; 22. Vertical connecting rod; 23. Vibrating head; 24. Vent hole. Detailed Implementation
[0021] The present invention will be further described in conjunction with the following embodiments.
[0022] Example 1.
[0023] like Figure 1-5 As shown, a reverse-flushing dust removal device includes a support base 1, a dust removal housing 2 mounted on the support base 1, an exhaust pipe 3 connected to the top of the dust removal housing 2, an air inlet pipe 4 connected to one side of the bottom of the dust removal housing 2, a dust collection trough 5 movably mounted through the support base 1 at the bottom of the dust removal housing 2, an extension box 6 mounted on one side of the dust removal housing 2, a reverse-flushing mechanism 7 and a telescopic drive mechanism 8 installed inside the extension box 6, an air pump 9 mounted outside the extension box 6, and a reverse-flushing pipe 10 connected to the air pump 9.
[0024] The support base 1 is made of thickened steel plate and bent into one piece, providing stable load-bearing support for the entire dust collector housing 2 and extension box 6; the dust collection trough 5 adopts a pull-out structure and can be pulled out from the outside of the support base 1 to collect the dust that falls off the dust collector bags 19, which is convenient for centralized cleaning and transportation without stopping the machine to disassemble the equipment; the dust-laden exhaust gas is sent into the dust collector housing 2 through the air inlet pipe 4, and after being filtered and purified by the dust collector bags 19, the clean gas is discharged outward from the top exhaust pipe 3, completing the basic dust removal operation.
[0025] The dust collector housing 2 has an extension box 6 sealed and welded on one side. The extension box 6 is divided into upper and lower installation spaces. The upper layer is equipped with a back-blowing mechanism 7, and the lower layer is equipped with a telescopic drive mechanism 8. The partitioned layout avoids interference between the pipeline and the cylinder movement. The external air pump 9 is connected to an external high-pressure air source through the back-blowing pipe 10 to provide high-pressure blowing airflow for the entire back-blowing dust removal structure.
[0026] The back-blowing mechanism 7 includes four sets of back-blowing tubes 11. The four sets of back-blowing tubes 11 are installed in the upper part of the extension box 6. One end of the four sets of back-blowing tubes 11 is connected to the air pump 9. The other end of the four sets of back-blowing tubes 11 is movably and sealed to four sets of telescopic air guide pipes 12. The four sets of telescopic air guide pipes 12 extend into the dust collector housing 2. The bottom of each of the four sets of telescopic air guide pipes 12 is provided with a back-blowing head assembly 13.
[0027] Four sets of back-blowing capillary tubes 11 are arranged in parallel at equal intervals, corresponding one-to-one with the dust collector bags 19 below. The tube body connection position adopts a sliding sealing sleeve to achieve a movable seal, and there will be no high-pressure gas leakage during the extension and retraction of the telescopic air guide tube 12. The high-pressure airflow output by the air pump 9 is evenly distributed to the four back-blowing capillary tubes 11 and synchronously delivered to each set of telescopic air guide tubes 12, realizing synchronous back-blowing and dust removal of multiple dust collector bags 19, which greatly improves the efficiency of dust removal operation.
[0028] The telescopic drive mechanism 8 includes two sets of telescopic cylinders 14. The two sets of telescopic cylinders 14 are installed in the lower half of the extension box 6. The telescopic cylinders 14 extend into the dust collector housing 2. Each set of telescopic cylinders 14 has a connecting rod 15 installed at its end. A support plate 16 is welded between the two sets of connecting rods 15. The support plate 16 is welded to the bottom of the four sets of telescopic air guide pipes 12 to drive the telescopic air guide pipes 12 to telescopically move.
[0029] Two sets of telescopic cylinders 14 extend and retract synchronously by electric control, and the front connecting rod 15 pushes and pulls the support plate 16 synchronously. The support plate 16 synchronously drives the four telescopic air guide pipes 12 to move up and down as a whole, ensuring that the strokes of the four sets of back-blowing head assemblies 13 are completely synchronized, and avoiding single-set pipeline deviation from colliding with the dust collector bag 19. The cylinder and pipeline are linked and driven in an integrated manner, eliminating the need to set up multiple sets of drive components separately. The structure is simple, the control logic is simple, and the equipment failure rate is low.
[0030] Under normal filtration conditions and without the need for backflushing, the control system controls the two sets of telescopic cylinders 14 to fully retract, and the connecting rod 15 and the support plate 16 simultaneously pull the telescopic air guide pipe 12 upward, storing the telescopic air guide pipe 12 and all the bottom backflushing head assemblies 13 into the internal space of the extension box 6. The entire backflushing structure is completely withdrawn from the internal airflow channel of the dust collector housing 2, without obstructing or interfering with the upward flow of the filtered airflow inside the dust collector housing, ensuring that the airflow passes through the dust collector bag 19 evenly and smoothly, and avoiding the formation of airflow vortices due to long-term suspension of the pipeline, which would cause dust to be adsorbed on the surface of the bag again.
[0031] A partition plate 17 is horizontally installed inside the dust collector housing 2. Bag slots 18 are evenly opened on the partition plate 17. Dust collector bags 19 are installed in the bag slots 18. The partition plate 17 divides the interior of the dust collector housing 2 into an upper clean air chamber and a lower dust filtration chamber. The dust collector bags 19 are vertically clamped and fixed in the bag slots 18. The airflow must pass through the bag fibers to be discharged upward. The dust is intercepted and adheres to the outer wall of the bag, providing a target for subsequent backflushing and cleaning.
[0032] The backflush head assembly 13 includes a vertical air guide tube 20. One end of the vertical air guide tube 20 is connected to the bottom of the telescopic air guide tube 12, and a conical nozzle 21 is installed at the other end of the vertical air guide tube 20. A vertical connecting rod 22 is installed inside the conical nozzle 21, and a vibrating head 23 is rotatably installed at the end of the vertical connecting rod 22. A vent hole 24 is annularly opened in the center of the vibrating head 23.
[0033] High-pressure airflow is delivered to the conical nozzle 21 through the telescopic air guide pipe 12 and the vertical air guide pipe 20. The airflow is sprayed outward through the annular vent 24, forming a surrounding blowing airflow that impacts the dust on the outer wall of the dust collector bag 19 from all directions. During the airflow spraying process, it impacts the vibrating head 23, causing the vibrating head 23 to rotate at high speed and in small amplitude along the vertical connecting rod 22, generating continuous mechanical vibration. This loosens the dust that is clumped and has strong adhesion on the surface of the bag, and it is simultaneously peeled off in conjunction with the high-pressure airflow, solving the defect that traditional single airflow blowing cannot clean clumped dust.
[0034] The conical nozzle 21 and the vibrating head 23 are coaxially installed, and the vent holes 24 on the conical nozzle 21 and the vibrating head 23 are installed correspondingly. The conical nozzle 21 and the vibrating head 23 are vertically installed directly above the dust collector bag 19. The coaxial arrangement ensures that the blowing airflow is vertically aligned with the center of the bag, and the airflow evenly covers the entire outer wall of the bag without any blind spots. The vibrating head 23 is directly attached to the upper part of the bag, and the vibration energy can be transmitted downward along the bag fabric to improve the dust removal effect in the middle and lower part of the bag.
[0035] The length of the telescopic cylinder 14 is the same as the sum of the lengths of the backflushing tube 11 and the telescopic air guide tube 12. The telescopic cylinder 14 and the backflushing tube 11 are installed parallel to each other vertically. The parallel and equal-length matching structure ensures that the maximum extension stroke of the telescopic cylinder 14 just covers the entire extension length of the telescopic air guide tube 12. During the extension and retraction process, the pipeline and cylinder are subjected to uniform force, and there will be no problems such as excessive pipeline stretching or cylinder overload. The synchronization and stability of movement are greatly improved. At the same time, it can be adapted to dust collector bags of different lengths and specifications, making the equipment more versatile. When the telescopic cylinder 14 is fully retracted, the telescopic air guide tube 12 and the backflushing head assembly 13 are all stored inside the extension box 6, completely separated from the airflow area inside the dust collector housing 2, without affecting the normal filtration operation of the whole machine.
[0036] The overall working principle and process of this device: Dust-laden waste gas generated in industrial production is sent into the interior of the dust collector housing 2 through the bottom air inlet pipe 4. The gas rises through the dust collector bags 19 on the partition plate 17, and the dust particles are intercepted and attached to the outer surface of the dust collector bags 19. The filtered clean air flows upward and is discharged through the top exhaust pipe 3, completing the normal dust removal and filtration process.
[0037] During the regular continuous filtration phase, when no backflushing is required, the telescopic cylinder 14 remains fully retracted throughout the entire process. The supporting horizontal plate 16 drives all telescopic air guide pipes 12 and backflushing head assembly 13 to be housed inside the extension box 6. There are no backflushing pipes obstructing the dust collector housing 2, ensuring unobstructed airflow. The airflow can pass through all the dust collector bags 19 evenly and stably without causing local turbulence due to pipe obstruction, effectively reducing secondary dust adsorption and ensuring stable dust collection airflow and filtration efficiency.
[0038] When dust accumulates on the outer wall of the dust collector bag 19 to a set thickness and the ventilation resistance of the equipment increases, the control system starts the dust removal program: the external air pump 9 is turned on, and high-pressure gas is delivered to the four back-blowing thin pipes 11 through the back-blowing pipe 10; at the same time, the two sets of telescopic cylinders 14 extend downward synchronously, and drive the four telescopic air guide pipes 12 to extend downward synchronously through the connecting rod 15 and the support horizontal plate 16, and the bottom back-blowing head assembly 13 moves vertically downward along the dust collector bag 19.
[0039] High-pressure airflow is delivered to the conical nozzle 21 via the vertical air guide pipe 20. The high-pressure airflow is sprayed outward from the annular vent hole 24 of the vibrating head 23. The airflow impacts the dust on the outer wall of the bag. Under the impact of the airflow, the vibrating head 23 rotates and vibrates continuously in a small amplitude. The mechanical vibration disperses the hardened and clump-like dust on the surface of the bag. The high-pressure airflow simultaneously blows the loose dust into the dust collection groove 5 at the bottom of the shell.
[0040] The telescopic cylinder 14 extends and retracts at a constant speed throughout the entire process, driving the back-blowing head assembly 13 to reciprocate along the entire length of the dust collector bag 19, achieving dust removal from top to bottom without any dead angles; four dust collector bags 19 in a single batch are cleaned simultaneously, eliminating the need for separate processing in batches, and the dust removal time is short. After the dust removal is completed, the air pump 9 stops supplying air, and the telescopic cylinder 14 quickly retracts and resets, retracting the entire telescopic air guide pipe 12 and back-blowing head assembly 13 back into the extension box 6 for storage, and the equipment re-enters the normal filtration state without obstruction.
[0041] The bottom dust collection trough 5 adopts a pull-out movable structure. When the dust accumulates to a certain amount, it can be directly pulled out and emptied without stopping the machine to disassemble the dust removal shell, making maintenance convenient. The support base 1 stably supports the whole machine, and the structure does not shake during operation, ensuring the alignment accuracy of the backflushing pipeline.
[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.
Claims
1. A reverse-flushing dust collector, characterized in that: The device includes a support base, on which a dust collector housing is mounted. An exhaust pipe is connected to the top of the dust collector housing, and an air inlet pipe is connected to one side of the bottom of the dust collector housing. A dust collection trough is movably installed through the support base at the bottom of the dust collector housing. An extension box is mounted on one side of the dust collector housing. A back-blowing mechanism and a telescopic drive mechanism are installed inside the extension box. An air pump is installed outside the extension box, and the air pump is connected to a back-blowing pipe. The back-blowing mechanism includes four sets of back-blowing tubes. The four sets of back-blowing tubes are installed in the upper part of the extension box. One end of each set of back-blowing tubes is connected to the air pump. The other end of each set of back-blowing tubes is movably and sealed to four sets of telescopic air guides. The four sets of telescopic air guides extend into the dust removal housing. A back-blowing head assembly is provided at the bottom of each set of telescopic air guides.
2. The reverse-flushing dust collector according to claim 1, characterized in that: The telescopic drive mechanism includes two sets of telescopic cylinders, which are installed in the lower half of the extension box. The telescopic cylinders extend into the dust removal housing. Each set of telescopic cylinders has a connecting rod at its end. A support plate is welded between the connecting rods of the two sets of telescopic cylinders. The support plate is welded to the bottom of the four sets of telescopic air guide pipes to drive the telescopic air guide pipes to move in and out of the housing.
3. The reverse-flushing dust collector according to claim 2, characterized in that: A partition plate is horizontally installed inside the dust collector housing. The partition plate has evenly spaced bag slots, and dust collector bags are installed in the bag slots.
4. The reverse-flushing dust collector according to claim 3, characterized in that: The backflush head assembly includes a vertical air guide tube, one end of which is connected to the bottom of the telescopic air guide tube, and a conical nozzle is installed at the other end of the vertical air guide tube. A vertical connecting rod is installed inside the conical nozzle, and a vibrating head is rotatably installed at the end of the vertical connecting rod. An air vent is provided in the center of the vibrating head.
5. A reverse-flushing dust collector according to claim 4, characterized in that: The conical nozzle and the vibrating head are coaxially mounted, and the positions of the vent holes on the conical nozzle and the vibrating head correspond to each other. The conical nozzle and the vibrating head are vertically mounted directly above the dust collector bag.
6. A reverse-flushing dust collector according to claim 5, characterized in that: The maximum extension stroke of the telescopic cylinder is matched with the total length of the backflush tube and the telescopic air guide tube, and the telescopic cylinder and the backflush tube are installed parallel to each other vertically.