Pulse dust removal device for micro powder collection

Abstract

The invention belongs to the technical field of micro powder pulse dust removal, and particularly relates to a pulse dust removal device for micro powder collection, which comprises an outer shell, a plurality of purification chambers distributed left and right are arranged on the upper half part in the outer shell, and a dust collection chamber communicated with the purification chambers is arranged on the lower half part in the outer shell. A multi-bag supporting frame and an air inlet assembly are arranged in the purification chamber, a plurality of filter bags are arranged on the multi-bag supporting frame, and a pulse injection assembly and an air outlet assembly are arranged on the upper portion of the outer shell. The multi-bag supporting frame comprises a sliding plate arranged in the purification chamber, and three pitch changing assemblies and a driving assembly are arranged on the lower side of the sliding plate in the length direction of the sliding plate. By arranging the variable pitch assembly and the driving assembly, the diameter of the annular supporting area of the filter bag is adjusted, so that the filter bag is in an optimal tensioning state after being mounted. And fiber fatigue and elastic loss caused by too tight support and collapse and filtration area reduction of the filter bag caused by too loose support are avoided, so that the service life of the filter bag is remarkably prolonged.

Description

Technical Field

[0001] This invention belongs to the field of micro powder pulse dust removal technology, and particularly relates to a pulse dust removal device for micro powder collection. Background Technology

[0002] Pulse jet dust collectors are a common and highly efficient air purification device in industrial production. They can effectively separate fine powders (such as cement powder, flour, coal powder, etc.) suspended in the air from the airflow, reducing air pollution. They use high-pressure gas pulse instantaneous blowing to automatically remove dust accumulated on the filter media, enabling the equipment to work continuously and stably.

[0003] Existing pulse dust collectors have the following problems:

[0004] 1. Traditional rigid filter cages cannot adjust the tightness of their fit with the filter bag after installation. If the support is too loose, the filter bag will partially collapse under negative pressure during filtration, reducing the effective filtration area and increasing system resistance; if the support is too tight, the filter bag fibers will be in a state of high tension for a long time, which will not only reduce their elasticity and affect the dust removal and bulging effect, but also accelerate fiber fatigue due to stress concentration and shorten the life of the filter bag.

[0005] In traditional bottom-inlet, vertically arranged filter bag structures, the dust-laden airflow rises from bottom to top, causing the lower half of the filter bag to become clogged more quickly due to contact with a higher concentration of dust, resulting in a much higher filtration load than the upper half. However, with pulse jet nozzles positioned directly above the filter bags, the downward pulse cleaning impact force decreases with distance, making the impact on the lower half, which requires the most cleaning, the weakest. To achieve the desired cleaning effect, the pulse intensity needs to be increased, but this further increases the pressure on the filter bags during pulses, thus shortening their lifespan. Summary of the Invention

[0006] To address the aforementioned problems, the present invention provides a pulse dust collector for collecting micropowder, which solves the problems mentioned in the background art.

[0007] To achieve the above objectives, this application provides the following technical solution: The present invention provides a pulse dust collector for collecting micropowder, comprising an outer shell. The upper half of the inner shell contains multiple purification chambers distributed horizontally, and the lower half of the inner shell contains a dust collection chamber connected to the purification chambers. Each purification chamber contains a multi-bag support frame and an air inlet assembly. Multiple filter bags are mounted on the multi-bag support frame. A pulse jet cleaning assembly and an air outlet assembly are located on the upper part of the outer shell. The multi-bag support frame includes a sliding plate disposed within the purification chamber. Three sets of pitch-changing assemblies and one set of drive assemblies are arranged along the length of the sliding plate. Multiple inner support rods are mounted on the pitch-changing assemblies. The inner support rods of the same set are evenly distributed in a ring to form a ring-shaped support area. The drive assembly controls the three sets of pitch-changing assemblies to move the inner support rods of each set radially along the corresponding ring-shaped support area, adjusting the diameter of the ring-shaped support area. The pitch-changing assemblies also include a clamping assembly for fixing the filter bag ports. The air intake assembly includes an air intake pipe 1 fixedly installed in the clean room and symmetrically distributed on the left and right sides. Multiple air intake pipes 2 are fixedly installed along the length of the air intake pipe 1 and connected to it. Multiple branch pipes are fixedly installed along the length of the air intake pipes 2. The spacing between the multiple branch pipes on each air intake pipe 2 gradually decreases from bottom to top, so that the air intake volume when the air to be purified enters the air intake pipe 2 and is discharged from each branch pipe increases sequentially from bottom to top.

[0008] According to an advantageous embodiment, a guide rail is fixedly installed on the upper inner wall of the cleanroom. The guide rail has a guide rail groove adapted to the slide plate. The slide plate is slidably inserted into the guide rail groove. Two spring limit pins are fixedly installed on the front side of the guide rail to limit the slide plate after it is inserted into the guide rail groove on the guide rail.

[0009] According to an advantageous embodiment, the pitch-changing assembly includes a guide disc fixedly disposed on the lower side of the slide plate. A plurality of guide plates arranged in a ring are disposed on the lower side of the guide disc. The guide plates slide radially along the guide disc. The upper end of the inner support rod is fixedly disposed on the lower side of the guide plate. A guide post is also fixedly disposed on the lower side of the guide plate. A drive gear is also rotatably disposed on the lower side of the guide disc. An arc-shaped guide groove is opened on the drive gear at a position corresponding to each guide post. The guide post slides against the corresponding arc-shaped guide groove.

[0010] According to an advantageous embodiment, the drive assembly includes a fixed seat fixedly disposed on the lower side of the slide plate, a groove is provided on the lower side of the fixed seat, a drive screw is rotatably disposed in the groove, a drive seat is threadedly connected to the drive screw at a position corresponding to each drive toothed disc, and a drive toothed plate that meshes with the adjacent drive toothed disc is fixedly disposed on the lower side of the drive seat.

[0011] According to an advantageous embodiment, the clamping assembly includes a clamping ring, on which a plurality of fixing bolts are provided distributed along its circumference, and locking seats are fixedly provided on the outer periphery of the guide plate at positions corresponding to the clamping ring, and the fixing bolts are threadedly connected to the corresponding locking seats.

[0012] According to an advantageous embodiment, the guide plate, the corresponding slide plate, the corresponding guide rail, and the upper side of the outer shell are all provided with an air outlet channel that communicates with the inside of the filter bag, and the upper port of the air outlet is provided with a three-way pipe.

[0013] According to an advantageous embodiment, the pulse jet assembly includes a jet pipe fixedly connected to the upper port of a tee pipe, and all jet pipes are connected to an external pulse cleaning system via an air supply pipe rack.

[0014] According to an advantageous embodiment, the air outlet assembly includes an air outlet pipe 1 fixedly connected to the side port of the three-way pipe, adjacent air outlet pipes 1 are connected together by air outlet pipe 2, and the two rightmost air outlet pipes 2 are connected to an external air extraction device.

[0015] Compared with the prior art, the pulse dust collector for collecting micro powder provided in this embodiment of the invention has the following beneficial effects:

[0016] 1. In this invention, the radial movement of the inner support rod can be precisely controlled through the pitch-changing assembly and the drive assembly, adjusting the diameter of the annular support area of ​​the filter bag to ensure that the filter bag is in optimal tension after installation. This avoids fiber fatigue and elasticity loss caused by excessive support, as well as filter bag collapse and reduced filtration area caused by excessively loose support, thereby significantly extending the service life of the filter bag.

[0017] 2. In this invention, the air intake assembly adopts a design where the spacing between the branch pipes gradually decreases from bottom to top. This reduces the amount of air to be purified discharged along the filter bag from top to bottom, thereby increasing the filtration load in the upper half of the filter bag and decreasing the load in the lower half. This distribution ensures that the dust adhesion is consistent with the attenuation characteristics of the pulse cleaning impact force. The area with strong pulse impact force corresponds precisely to the area with more dust on the outside of the filter bag, resulting in a more thorough cleaning effect. Dust can be effectively removed without needing to increase the pulse intensity during cleaning, further reducing damage to the filter bag from the pulse. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the external three-dimensional structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the internal structure of the outer shell in this invention.

[0020] Figure 3 This is a schematic diagram of the front cross-sectional planar structure of the present invention.

[0021] Figure 4This is a schematic diagram of the planar structure connecting the multi-bag support frame to the cleanroom in this invention.

[0022] Figure 5 This is a schematic diagram of the exploded structure of the air outlet assembly, pulse jet assembly, and outer shell in this invention.

[0023] Figure 6 This is a three-dimensional structural diagram showing the relative positions of the multi-bag support frame and the air intake assembly in this invention.

[0024] Figure 7 This is a schematic diagram of the external three-dimensional structure of the multi-bag support frame in this invention.

[0025] Figure 8 This is a schematic diagram of the main sectional view of the filter bag support in this invention.

[0026] Figure 9 for Figure 8 A magnified planar structural diagram of part A.

[0027] Figure 10 This is a bottom-view plan view of the multi-bag support frame in this invention.

[0028] Figure 11 This is a partial three-dimensional structural diagram of the multi-bag support frame in this invention.

[0029] Figure 12 This is a schematic diagram of the exploded structure of the slide plate, pitch control assembly, and clamping assembly in this invention.

[0030] The attached diagram shows the following components: 1. Outer shell; 2. Cleanroom; 3. Dust collection chamber; 4. Multi-bag support frame; 41. Slide plate; 42. Pitch variable assembly; 421. Guide plate; 422. Guide plate; 423. Guide column; 424. Drive gear plate; 425. Arc-shaped guide groove; 43. Drive assembly; 431. Fixing seat; 432. Drive screw; 433. Drive seat; 434. Drive gear plate; 44. Inner support rod; 45. Pressing assembly; 451. Pressing ring; 452. Fixing bolt; 5. Air intake assembly; 51. Air intake pipe one; 52. Air intake pipe two; 53. Branch pipe; 6. Filter bag; 7. Pulse jet blowing assembly; 8. Air outlet assembly; 9. Annular support area; 10. Guide rail; 11. Spring limit pin; 12. Air outlet channel; 13. T-shaped pipe. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1 -Appendix Figure 12 This application will be described in further detail.

[0032] Please refer to the following: Figures 1-3A pulse dust collector for collecting micro powder includes a rectangular outer shell 1. The upper half of the inner shell 1 is provided with multiple purification chambers 2 distributed from left to right, and the lower half of the inner shell 1 is provided with a dust collection chamber 3 connected to the purification chambers 2. The purification chambers 2 are provided with a multi-bag support frame 4 and an air inlet assembly 5. Multiple filter bags 6 are provided on the multi-bag support frame 4. The upper part of the outer shell 1 is provided with a pulse jet assembly 7 and an air outlet assembly 8.

[0033] In operation, the multi-bag support frame 4 slides out of the cleanroom 2, and the filter bags 6 are fixed and opened by the multi-bag support frame 4 before being sent into the outer shell 1. The support tension of each filter bag 6 is adjusted by the multi-bag support frame 4 to ensure that each filter bag 6 is in the optimal tension state. Through the air intake component 5 and the external air supply equipment, the air to be purified containing fine powder is sent into the air intake component 5. The air intake component 5 can divert the air to be purified along the vertical filter bags 6 in an order of increasing air volume, thereby providing more air to be purified for the upper part of the filter bags 6. This allows the upper part of the filter bags 6 to filter fine dust more efficiently, improves the overall filtration effect of the filter bags 6, and causes the surface clogging rate of the filter bags 6 to gradually decrease from top to bottom. When pulse cleaning is performed on the inside of the filter bags 6, the stronger the pulse impact force, the more severe the clogging of the filter bags 6, which meets the optimal working conditions of pulse cleaning. There is no need to increase the pulse intensity to improve the pulse cleaning effect of the filter bags 6, reducing the damage to the filter bags 6 during pulse cleaning, thereby extending the service life of the filter bags 6.

[0034] See Figure 4 , Figures 6-12 To facilitate the fixing of the filter bag 6 to the multi-bag support frame 4 and ensure that the filter bag 6 maintains optimal tension during filtration, the multi-bag support frame 4 includes a slide plate 41 disposed within the purification chamber 2. A guide rail 10 is fixedly disposed on the upper inner wall of the purification chamber 2, and the guide rail 10 has guide grooves adapted to the slide plate 41. The slide plate 41 is slidably inserted into the guide grooves. Two spring-loaded limiting pins 11 are fixedly disposed on the front side of the guide rail 10 to limit the slide plate 41 after it is inserted into the guide grooves on the guide rail 10. Three sets of pitch-changing components 42 and one set of drive components 43 are disposed on the lower side of the slide plate 41 along its length direction. One set of drive components 43 drives three sets of pitch-changing components 42. Multiple inner support rods 44 are disposed on the pitch-changing components 42, with each set of inner support rods 44 having no less than six rods. This solution uses six rods as an example. Multiple inner support rods 44 in the same group are evenly distributed in a ring to form a ring support area 9. The drive component 43 controls three sets of pitch-changing components 42 to drive the multiple inner support rods 44 in each group to move radially along the corresponding ring support area 9, adjusting the diameter of the ring support area 9. The pitch-changing component 42 is also equipped with a clamping component 45 to fix the port of the filter bag 6.

[0035] In practice, when installing the filter bag 6, the drive assembly 43 controls three sets of pitch-changing assemblies 42 to adjust the multiple inner support rods 44 of each annular support area 9 to expand outward, so that the diameter of the annular inner support area is about 10% larger than the diameter of the filter bag 6. This allows the operator to slip the filter bag 6 onto the filter bag. Utilizing the flexibility of the filter bag 6, it is fitted onto the multiple outwardly expanding inner support rods 44, and the port of the filter bag 6 is pushed upward to the preset position. Then, the edge of the port of the filter bag 6 is turned outward and fixed by the clamping assembly 45. After all the filter bags 6 under the slide plate 41 are fixed in the designated position, the drive assembly 43, in conjunction with the pitch-changing assemblies 42, closes the multiple inner support rods 44 symmetrically located on the inner sidewall of the filter bag 6 inward. This ensures that the diameter of the annular support area 9 after closing matches the inner diameter of the filter bag 6, and provides appropriate tension to the filter bag 6. (Specific dimensions can be modified according to actual conditions). It can actively control the tension of the inner support rod 44 on the filter bag 6, so as to avoid the filter bag 6 being over-tensioned, which would affect the filtration effect and shorten the service life of the filter bag 6.

[0036] See Figures 10-12 To facilitate the simultaneous closing or opening of the multiple annularly distributed inner support rods 44, the pitch-changing assembly 42 includes a guide disk 421 fixedly mounted on the lower side of the slide plate 41. Multiple annularly distributed guide plates 422 are disposed on the lower side of the guide disk 421, and the guide plates 422 slide radially along the guide disk 421. The upper ends of the inner support rods 44 are fixedly mounted on the lower side of the guide plates 422. Guide posts 423 are also fixedly mounted on the lower side of the guide plates 422. A drive gear disk 424 is rotatably mounted on the lower side of the guide disk 421. An arc-shaped guide groove 425 is provided on the drive gear disk 424 at a position corresponding to each guide post 423, and the guide post 423 slides against the corresponding arc-shaped guide groove 425. The drive assembly 43 controls the rotation of the drive gear disk 424, thereby allowing the arc-shaped guide grooves 425 on the drive gear disk 424 to compress and push the guide post 423 to slide radially along the corresponding drive gear disk 424.

[0037] See Figures 10-12 To facilitate simultaneous control of the rotation of the drive gear 424 in the three sets of pitch-changing assemblies 42, the drive assembly 43 includes a fixed base 431 fixedly mounted on the underside of the slide plate 41. A groove is provided on the underside of the fixed base 431, and a drive screw 432 is rotatably mounted within the groove. A drive seat 433 is threadedly connected to the drive screw 432 at a position corresponding to each drive gear 424. A drive gear plate 434, meshing with the adjacent drive gear 424, is fixedly mounted on the underside of the drive seat 433. One end of the drive screw 432 movably passes through one side of the fixed base 431 and is fixedly connected to a rotating handle. The operator can rotate the drive screw 432 by controlling the rotating handle, causing the drive seat 433 to slide accordingly and move the drive gear plate 434. The drive gear plate 434 controls the rotation of the drive gear 424, thereby causing the inner drive support rod 44 to slide and change pitch.

[0038] See Figure 8 , Figure 9 and Figure 12 The clamping assembly 45 includes a clamping ring 451 movably sleeved on the outer surface of multiple inner support rods 44. Multiple fixing bolts 452 are provided on the clamping ring 451 along its circumferential direction. Locking seats are fixedly provided on the outer periphery of the guide plate 421 at positions corresponding to the clamping ring 451. The fixing bolts 452 are threadedly connected to the corresponding locking seats. After the filter bag 6 is fitted onto the surface of the multiple inner support rods 44, the port of the filter bag 6 is moved upward by the operator to the lower side of the guide plate 421. The port of the filter bag 6 is turned outward along the guide plate 421, so that part of the port of the filter bag 6 is attached to the surface of the guide plate 421. Then, the clamping ring 451 is fitted onto the surface of the filter bag 6 from the bottom and moved to the lower side of the guide plate 421. Finally, the fixing bolts 452 are connected to the locking seat on the outer side of the guide plate 421 in sequence, pressing the clamping ring 451 together with the port of the filter bag 6 onto the lower side of the guide plate 421. The side of the clamping ring 451 near the guide plate 421 can also be provided with a micro-serrated structure to improve the clamping force on the filter bag 6.

[0039] See Figure 3 and Figure 6 To ensure that the filter bag 6 can effectively filter the air to be purified, the air intake assembly 5 includes an air intake pipe 51 fixedly installed in the purification chamber 2 and symmetrically distributed on both sides. Multiple air intake pipes 52 connected to the air intake pipe 51 are welded along its length. Multiple branch pipes 53 are welded along the length of each air intake pipe 52, with the ends of the branch pipes 53 inclined downwards to prevent agglomerates generated by the pulse of the filter bag 6 from entering the branch pipes 53 when directly facing the filter bag 6. The spacing between the multiple branch pipes 53 on each air intake pipe 52 gradually decreases from bottom to top, so that the air intake volume increases sequentially from bottom to top when the air to be purified enters the air intake pipe 52 and exits from each branch pipe 53.

[0040] In actual operation, the air to be purified enters from the outside into the first air inlet pipe 51 and the second air inlet pipe 52, and is finally discharged through the branch pipe 53. Since the number of branch pipes 53 increases from bottom to top, the amount of air to be purified discharged increases from bottom to top along the filter bag 6. In addition, the adsorption force inside the filter bag 6 comes from the uppermost air outlet component 8. Therefore, the adsorption force inside the filter bag 6 decreases from top to bottom along the vertical direction of the filter bag 6, thus ensuring that there is sufficient adsorption force at the top of the filter bag 6 to carry more filtration tasks. This allows the filter bag 6 to filter more air to be purified at the same time. This filtration state also makes the dust adhesion more severe on the surface of the filter bag 6 closer to the pulse jet cleaning component 7. This allows the pulse jet cleaning component 7 to remove dust from the filter bag 6 without increasing the power, eliminating the adverse effects of increasing the pulse power on the filter bag 6.

[0041] See Figure 5 and Figure 8 An air outlet channel 12, communicating with the inside of the filter bag 6, is jointly provided between the guide plate 421, the corresponding slide plate 41, the corresponding guide rail 10, and the upper side of the outer shell 1. All corresponding positions of the ports of the components in the air outlet channel 12 are sealed. A three-way pipe 13 is provided at the upper port of the air outlet. The other two ends of the three-way pipe 13 are respectively connected to the pulse jet cleaning assembly 7 and the air outlet assembly 8. The pulse jet cleaning assembly 7 includes a jet pipe fixedly connected to the upper port of the three-way pipe 13, and all jet pipes are connected to an external pulse cleaning system through an air supply pipe frame. The air outlet assembly 8 includes an air outlet pipe 1 fixedly connected to the side port of the three-way pipe 13. Adjacent air outlet pipes 1 are connected together by air outlet pipe 2, and the two rightmost air outlet pipes 2 are connected to an external air extraction device.

[0042] The filtered air inside the filter bag 6 enters the three-way pipe 13 through the air outlet and is ultimately discharged to the air outlet assembly 8 through the three-way pipe 13. Simultaneously, when pulse cleaning of the filter bag 6 is required, the blowpipe is connected to the external pulse cleaning system via the air supply pipe frame. Within a very short time, a stream of high-pressure compressed air is vertically injected into the filter bag 6 in the form of a shock wave, causing the filter bag 6 to vibrate at high frequency and expand instantaneously, thereby shaking off the dust layer adhering to the outer surface of the filter bag 6. The specific structure and connection of the pulse cleaning system are well-known to those skilled in the art and will not be elaborated upon in this solution.

[0043] The specific working principle of this solution is as follows: For filter bag 6 installation, the multi-bag support frame 4 is removed, and the position of each set of inner support rods 44 is adjusted so that the filter bag 6 can be fitted onto the inner support rods 44 under a certain tension. Then, the filter bag 6 is fixed in place, and the entire assembly is pushed into the purification chamber 2 via the sliding plate 41. At this point, a complete air outlet channel 12 communicating with the filter bag 6 is formed between the sliding plate 41, the guide rail 10, and the upper side of the outer shell 1. According to the tension requirements of the filter bag 6 during operation, the operator readjusts the tension rods to adjust the tension of the filter bag 6 and the corresponding tension rod.

[0044] After installation, the external air to be purified enters the purification chamber 2 through the branch pipe 53 via the first air inlet pipe 51 and the second air inlet pipe 52. The air to be purified is drawn from the outside of the filter bag 6 to the inside for filtration by the adsorption force inside the filter bag 6, and then discharged from the upper air outlet pipe.

[0045] The filter bags 6 are cleaned regularly. The blowpipe works in conjunction with the external pulse cleaning system to clean the outside of the filter bags 6. The resulting dust clumps fall into the dust collection chamber 3 below.

[0046] In this solution, through the coordinated design of the drive assembly 43, the pitch-changing assembly 42, and the inner support rod 44, the diameter of the annular support area 9 used to support the filter bag 6 can be actively adjusted. This facilitates the installation of the filter bag 6 while achieving precise control of its tension, avoiding the drawbacks of traditional rigid bag cages that collapse due to excessive looseness or fatigue due to excessive tightness. Specifically, the problems of reduced effective filtration area and increased system resistance caused by excessive looseness are solved, while the issues of decreased fiber elasticity, poor dust removal effect, and shortened lifespan caused by excessive tightness are significantly improved.

[0047] In the air intake assembly 5, the branch pipes 53 are arranged vertically along the filter bag 6, and the multiple branch pipes 53 are distributed with the spacing gradually decreasing from bottom to top. This design reduces the amount of air to be purified entering the filter bag 6 from top to bottom, thereby increasing the filtration load in the upper half of the filter bag 6 and decreasing the load in the lower half. This distribution ensures that the dust adhesion is consistent with the attenuation characteristics of the pulse cleaning impact force. The area with strong pulse impact force corresponds precisely to the area with more dust on the outside of the filter bag 6, resulting in a more thorough cleaning effect. Dust can be effectively removed without increasing the pulse intensity during cleaning, further reducing damage to the filter bag 6 caused by the pulse.

[0048] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0049] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0050] In this invention, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "link," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0051] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A pulse dust collector for collecting fine powder, comprising an outer housing, characterized by: The upper half of the inner part of the shell is provided with a plurality of purification chambers distributed left and right, and the lower half of the inner part of the shell is provided with a dust collection chamber communicated with the purification chambers, a plurality of bag support frames and an air inlet assembly are arranged in the purification chamber, a plurality of filter bags are arranged on the bag support frame, and the upper part of the shell is provided with a pulse blowing assembly and an air outlet assembly; The bag support frame comprises a sliding plate arranged in the purification chamber, three groups of variable distance assemblies and a group of driving assemblies are arranged on the lower side of the sliding plate along the length direction, a plurality of inner supporting rods are arranged on the variable distance assembly, the inner supporting rods of the same group are evenly distributed in a ring shape to form a ring support area, the driving assembly controls the three groups of variable distance assemblies to drive the inner supporting rods of each group to move radially along the corresponding ring support area, adjusts the diameter of the ring support area, and the variable distance assembly is further provided with a compression assembly for fixing the filter bag port; The air inlet assembly comprises air inlet pipes I fixedly arranged in the purification chamber and symmetrically distributed left and right, a plurality of air inlet pipes II communicated with the air inlet pipes I are fixedly arranged on the air inlet pipes I along the length direction, and a plurality of branch pipes are fixedly arranged on the air inlet pipes II along the length direction, the distance between the branch pipes on each air inlet pipe II gradually shortens from bottom to top, so that the air inlet amount of the air to be purified increases from bottom to top when the air to be purified enters the air inlet pipes II and is discharged from each branch pipe.

2. The pulse dedusting device for collecting fine powder according to claim 1, characterized in that, A guide rail is fixedly arranged on the upper inner wall of the purification chamber, a guide groove matched with the sliding plate is formed in the guide rail, the sliding plate is slidingly inserted into the guide groove, and two spring limiting pins for limiting the sliding plate after being inserted into the guide groove are fixedly arranged on the front side of the guide rail.

3. The pulse dedusting device for collecting fine powder according to claim 2, characterized in that, The variable distance assembly comprises a guide disc fixedly arranged on the lower side of the sliding plate, a plurality of guide plates are arranged on the lower side of the guide disc in a ring shape, the guide plates slide along the radial direction of the guide disc, the upper end of the inner supporting rod is fixedly arranged on the lower side of the guide plate, the lower side of the guide plate is further fixedly provided with a guide column, the lower side of the guide disc is further rotatably provided with a driving gear plate, an arc-shaped guide groove is formed in the corresponding position of each guide column on the driving gear plate, and the guide column slidingly abuts against the corresponding arc-shaped guide groove.

4. The pulse dedusting device for collecting fine powder according to claim 3, characterized in that, The driving assembly comprises a fixed seat fixedly arranged on the lower side of the sliding plate, a sliding groove is formed in the lower side of the fixed seat, a driving screw is rotatably arranged in the sliding groove, a driving seat is threadedly connected to the corresponding position of each driving gear plate on the driving screw, and a driving gear plate engaged with the adjacent driving gear plate is fixedly arranged on the lower side of the driving seat.

5. The pulse dedusting device for collecting fine powder according to claim 3, characterized in that, The compression assembly comprises a compression ring, a plurality of fixed bolts are arranged on the compression ring along the circumferential direction, and a locking seat is fixedly arranged on the corresponding position of the outer circumferential side of the guide disc and the compression ring.

6. The pulse dedusting device for collecting fine powder according to claim 3, characterized in that, The guide disc, the corresponding sliding plate, the corresponding guide rail and the upper side of the shell jointly form an air outlet channel communicated with the inside of the filter bag, and a three-way pipe is arranged at the upper port of the air outlet hole.

7. The pulse dedusting device for collecting fine powder according to claim 6, characterized in that, The pulse blowing assembly comprises a blowing pipe fixedly connected with the upper port of the three-way pipe, and all the blowing pipes are connected with the external pulse dust removal system through a gas pipe frame.

8. The pulse dedusting device for collecting fine powder according to claim 6, characterized in that, The air outlet assembly comprises an air outlet pipe I fixedly connected with the side port of the three-way pipe, and the adjacent air outlet pipes I are connected through an air outlet pipe II, and the two rightmost air outlet pipes II are connected with the external air extraction device.

Images