Bag-type dust collector for wood-plastic plate polishing dust treatment

Abstract

The invention discloses a bag-type dust remover for wood-plastic plate polishing dust treatment, and relates to the technical field of bag-type dust removers. To solve the problem; the dust removal device specifically comprises a dust removal tank, a plurality of groups of filter bags, a dust removal mechanism, a separation part and a discharging mechanism, and the interior of the dust removal tank is divided into a purification cavity and a dust removal cavity through a partition plate. The bucket-shaped separation part is matched with the tangential air inlet pipe, so that high-speed airflow can be prevented from carrying large particles to directly impact a filter bag, abrasion of the filter bag is reduced, viscous dust aggregates and fiber layers on the outer surface of the filter bag are forcibly stripped by utilizing the outer dust removal assembly, and the problem that dust is easily adsorbed again is solved; the longitudinal air pipe synchronously rotates along with the driving shaft under the transmission of the bevel gear, and the air nozzle forms an annular impact surface and uniformly impacts the inner wall from the inside of the filter bag to the periphery, so that filter holes blocked by fibers are dredged, and external dust is assisted to fall off through airflow vibration.

Description

Technical Field

[0001] This invention relates to the field of baghouse dust collector technology, and more particularly to a baghouse dust collector for treating dust generated during the sanding of wood-plastic composite boards. Background Technology

[0002] Wood-plastic composite (WPC) is a composite board made of wood fiber (or plant fiber) and plastic. Its sanding dust is fibrous, lightweight, and combines the flammability of wood dust with the stickiness of plastic dust. The bag filter dust collector for WPC sanding dust treatment is an industrial dust removal device specifically designed to collect, filter, and purify the dust generated during the WPC sanding process. It belongs to a sub-category of bag filter technology. Its core function is to capture the mixed wood-plastic dust that escapes during the sanding process, reduce the dust concentration in the workshop, protect the health of operators, and meet environmental emission requirements.

[0003] A search revealed Chinese patent publication number CN121082012A, which discloses a high-efficiency bag filter dust collector, comprising: a dust collector body, an orifice plate at the top of the dust collector body, multiple sets of mounting holes on the orifice plate, gear grooves around the outer perimeter of the mounting holes on the orifice plate, a driven gear in the gear grooves, a filter bag frame installed in the mounting holes, a filter bag fitted at the bottom of the filter bag frame, a limiting groove around the top perimeter of the filter bag frame, a rotating ring rotatably connected in the limiting groove, a cross support plate inside the rotating ring, a second connecting pipe in the middle of the cross support plate, and a blower plate connected to the bottom of the second connecting pipe.

[0004] The aforementioned patent has the following shortcomings: When in use, the device uses a motor-driven second connecting pipe connected to the bottom of the cross support plate to perform a circular motion around the inside of the filter bag fitted at the bottom of the filter bag frame. This, combined with the gas sprayed into the filter bag through the blowpipe, cleans the dust adhering to the filter bag. However, when used in the sanding process of wood-plastic composite boards, the dust generated includes wood fibers, plastic particles, and a small amount of additives. This dust has a certain degree of stickiness. Although the device can use gas to blow open the filter holes on the filter bag and keep them open, the blowpipe's output holes blow radially towards the filter bag's pores. Dust still adheres to the outside of the filter bag, failing to effectively remove it. During continued use, the dust quickly re-adsorbs onto the filter bag's pores, which is detrimental to the filter bag's performance. Furthermore, when the dust enters the dust collector directly from the settling inlet, larger dust particles generated during the sanding process will wear down the filter bag under the influence of the airflow, thus affecting its service life. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a bag filter for treating dust generated during the sanding of wood-plastic composite boards.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A baghouse dust collector for treating sanding dust from wood-plastic composite boards includes a dust collection tank. The dust collection tank is divided into a purification chamber and a dust collection chamber by a partition. The purification chamber is connected to an air outlet pipe, and the dust collection chamber is connected to an air inlet pipe. The collector also includes: several sets of filter bags, all disposed on the partition. Each set of filter bags includes several filter bags arranged equidistantly along a straight line. The top opening of each filter bag communicates with the purification chamber, and the bottom of each filter bag extends into the dust collection chamber. A dust collection mechanism is also included, with one filter bag corresponding to each filter bag. The dust removal mechanism includes an external dust removal component and an internal dust removal component. The external dust removal component is used to remove dust from the outside of the filter bag, and the internal dust removal component is used to introduce high-pressure gas into the filter bag. A separator is disposed in the dust removal chamber and located between the output end of the air inlet pipe and the partition. The separator is used to separate large-diameter dust particles from the gas introduced through the air inlet pipe. A discharge mechanism is disposed at the bottom of the dust removal tank and is used to discharge dust particles accumulated at the bottom of the dust removal tank.

[0007] Preferably, the filter bag is connected to the partition plate via a frame, and the filter bag is fitted over the frame. The external dust removal assembly includes an annular air box fitted over the filter bag, two ear plates respectively connected to both sides of the annular air box, a lifting plate connected to the ear plates, a gravity plate connected to the ear plates, and a lifting and traction assembly corresponding to the ear plates. Two longitudinal slide rods are respectively provided on both sides of the filter bag. One end of each longitudinal slide rod is connected to the bottom of the partition plate. The output end of the annular air box faces the filter bag, and the output end of the annular air box forms an angle with the axial direction of the filter bag. The two ear plates are slidably connected to the two longitudinal slide rods. The traction end of the lifting and traction assembly drives the ear plates to slide axially along the longitudinal slide rods via the lifting plate. A counterweight is connected to the gravity plate.

[0008] Furthermore: the lifting and traction assembly includes a winch disposed in the purification chamber, a traction rope wound on the winch, and a hook connected to the lifting plate; wherein, one end of the traction rope extends from the winch through the partition into the dust removal chamber and is fixed to the hook, and an elastic bushing sleeved on the outside of the traction rope is connected to the partition, the traction rope can pass through the elastic bushing and abut against the inner wall of the elastic bushing; A return spring is sleeved on the outside of the longitudinal slide bar, and the two ends of the return spring are connected to the lifting plate and the partition plate respectively; a ring scraper is connected to the upper and lower surfaces of the ear plate, the ring scraper is sleeved on the outside of the longitudinal slide bar, and the blade of the ring scraper is in contact with the surface of the longitudinal slide bar.

[0009] Based on the aforementioned scheme: a guide rod is provided on one side of the filter bag along its axial direction, one end of the guide rod is connected to the bottom of the partition, a telescopic air tube is sleeved on the guide rod, the output end of the telescopic air tube is connected to the input end of the annular air box, the input end of the telescopic air tube extends through the partition into the purification chamber and is connected to a branch air tube, and the telescopic air tube is sealed and fixedly connected to the partition.

[0010] A preferred embodiment of the aforementioned scheme is as follows: a plurality of drive shafts are rotatably connected inside the purification chamber, and the plurality of drive shafts correspond to a plurality of groups of filter bags respectively. Each group of filter bags is provided with one drive shaft. The winch is connected to the drive shaft. One end of the drive shaft extends through the dust collection tank to the outside and is connected to the output end of a drive motor located outside the dust collection tank. The drive motor is mounted on the outer wall of the dust collection tank through a motor mounting plate.

[0011] As a further embodiment of the present invention: the internal dust removal assembly includes a longitudinal air pipe arranged along the axial direction of the filter bag, a plurality of air nozzles connected to the longitudinal air pipe, and a branch air pipe connected to the input end of the longitudinal air pipe via a rotating air pipe connector; wherein, the plurality of air nozzles are all disposed inside the filter bag, and a funnel-shaped ventilation component is provided inside one end of the filter bag located inside the purification chamber, and a ventilation hole is opened at the center line of the ventilation component, which is suitable for the longitudinal air pipe to pass through; The longitudinal air tube rotates inside the filter bag via a rotating bracket. A driven bevel gear is connected to the end of the longitudinal air tube, and a driving bevel gear is connected to the drive shaft at a position corresponding to the driven bevel gear. The driving bevel gear meshes with the driven bevel gear.

[0012] Meanwhile, the dust collector's purification chamber is equipped with an air guide pipe corresponding to the drive shaft. The input ends of branch air pipe one and branch air pipe two are connected to the inside of the air guide pipe. The input end of the air guide pipe extends to the outside of the dust collector and is connected to an air tank located outside the dust collector. The air tank is installed on the outer wall of the dust collector through a tank mounting plate. An air pump one is connected to the tank mounting plate. The output end of the air pump one is connected to the input end of the air tank through a connecting pipe one.

[0013] As a preferred embodiment of the present invention: the separating member is a bucket-shaped structure with both ends open and equal wall thickness. When the bottom of the separating member extends from its body towards the bottom of the dust collector, its inner diameter gradually decreases. The bottom of the separating member is connected to a straight pipe that is coaxial with the axis of the dust collector.

[0014] Meanwhile, the discharge mechanism includes a discharge pipe connected to the bottom of the dust collector, a discharge hopper located in the middle of the discharge pipe, a rotating shaft rotatably connected to the discharge hopper, cutting plates equidistantly arranged on the rotating shaft around its axis, and a second drive motor installed outside the discharge hopper; wherein, the discharge hopper is a cylindrical structure, the discharge hopper is connected to the discharge pipe, the axis of the rotating shaft coincides with the axis of the discharge hopper, one end of the rotating shaft extends through the discharge hopper to the outside and is connected to the output end of the second drive motor, and the cutting plates are in contact with the inner wall of the discharge hopper.

[0015] As a preferred embodiment of the present invention: an annular pipe is connected to the outside of the side wall of the discharge pipe output end, an air blowing pipe is connected to the output end of the annular pipe, the output end of the air blowing pipe extends through the discharge pipe into its interior, and is connected to an air nozzle two, the output end of the air nozzle two faces the interior of the discharge hopper, and an air pump two is installed on the outer wall of the discharge pipe through a support plate, the output end of the air pump two is connected to the input end of the annular pipe through a connecting pipe two.

[0016] The beneficial effects of this invention are as follows: 1. This invention employs a bucket-shaped separator in conjunction with a tangential air inlet pipe. After the dust-laden gas is introduced, a cyclone airflow is formed. Large-diameter dust particles are separated from the airflow under the action of centrifugal force, gravity, and airflow obstruction, and slide down and deposit along the outer wall of the separator. This avoids high-speed airflow carrying large particles that directly impact the filter bag, reducing filter bag wear. The external dust removal component is used to forcibly peel off the sticky dust agglomerates and fiber layers on the outer surface of the filter bag, solving the problem of easy dust re-adsorption. The internal dust removal component is cleared by a rotary jet. The longitudinal air pipe rotates synchronously with the drive shaft under the transmission of bevel gears. The air nozzle forms an annular impact surface, which evenly impacts the inner wall from the inside of the filter bag to the surrounding area. This not only clears the filter pores blocked by fibers, but also assists the external dust to fall off through airflow vibration, achieving dual dust removal of external peeling and internal clearing, which greatly improves the dust removal efficiency.

[0017] 2. In this invention, the tapered straight tube at the bottom of the separator guides the pre-purified airflow to diffuse smoothly into the filter bag area, avoiding airflow turbulence from causing additional impact on the filter bag and further protecting the structural integrity of the filter bag.

[0018] 3. In this invention, the annular scraper of the external dust removal component scrapes away dust from the surface of the longitudinal slide bar as the ear plate rises and falls, avoiding slippage and ensuring smooth lifting and lowering. At the same time, the telescopic air pipe extends and retracts synchronously with the annular air box, ensuring a continuous and stable supply of high-pressure gas and improving the continuity and reliability of the dust removal process.

[0019] 4. The discharge mechanism in this invention adopts a rotating cutting plate design. The cutting plate is in close contact with the inner wall of the discharge hopper and rotates with the rotating shaft to form a hopper that can hold dust, realizing continuous scraping and conveying of dust. Dust discharge can be completed without stopping the machine, thus improving work efficiency.

[0020] 5. The present invention features an airflow guiding structure consisting of a ring pipe, an air blowing pipe, and two air nozzles. High-pressure gas directionally impacts the surface of the cutting plate, effectively removing adhering sticky dust, preventing dust accumulation, ensuring unobstructed dust discharge channels, and solving the problem of dust obstruction caused by sticky dust adhesion. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of a bag filter for treating sanding dust from wood-plastic composite boards, as proposed in this invention. Figure 2 This is a cross-sectional structural diagram of a bag filter for treating sanding dust from wood-plastic composite boards, as proposed in this invention. Figure 3 This invention proposes a baghouse dust collector for treating dust generated during the sanding of wood-plastic composite boards. Figure 1 Schematic diagram of the middle section; Figure 4 This is a partial structural diagram of the discharge mechanism of a bag filter for treating dust from sanding wood-plastic composite boards, as proposed in this invention. Figure 5 This is an exploded structural diagram of the discharge mechanism of a bag dust collector for treating sanding dust of wood-plastic composite boards proposed in this invention. Figure 6 This is a schematic diagram of the dust removal mechanism and filter bag structure of a baghouse dust collector for treating sanding dust of wood-plastic composite boards proposed in this invention; Figure 7 This invention proposes a baghouse dust collector for treating dust generated during the sanding of wood-plastic composite boards. Figure 6 Schematic diagram of the middle section; Figure 8 This invention proposes a baghouse dust collector for treating dust generated during the sanding of wood-plastic composite boards. Figure 7 Schematic diagram of a local structure in the middle; Figure 9 This invention proposes a baghouse dust collector for treating dust generated during the sanding of wood-plastic composite boards. Figure 8 Enlarged schematic diagram of the structure at point A in the middle; Figure 10 This invention proposes a baghouse dust collector for treating dust generated during the sanding of wood-plastic composite boards. Figure 8 Enlarged schematic diagram of the structure at point B; Figure 11 This is a schematic diagram of the internal structure of the filter bag in a baghouse dust collector for treating sanding dust from wood-plastic composite boards, as proposed in this invention.

[0022] In the diagram: 1. Dust collector; 2. Purification chamber; 3. Dust collection chamber; 4. Exhaust duct; 5. Inlet duct; 6. Filter bag; 7. Separator; 8. Partition plate; 9. Discharge mechanism; 10. Annular air box; 11. Ear plate; 12. Longitudinal slide bar; 13. Lifting plate; 14. Gravity plate; 15. Counterweight; 16. Winch; 17. Hook; 18. Traction rope; 19. Elastic bushing; 20. Return spring; 21. Annular scraper; 22. Guide rod; 23. Telescopic air pipe; 24. Branch air pipe one; 25. Drive shaft; 26. Drive motor one; 27. Motor mounting plate; 28. 1. Longitudinal air pipe; 29. ​​Air nozzle one; 30. Ventilation component; 31. Branch air pipe two; 32. Rotary air pipe connector; 33. Driven bevel gear; 34. Driven bevel gear; 35. Air guide pipe; 36. Air tank; 37. Tank mounting plate; 38. Air pump one; 39. Connecting pipe one; 40. Straight pipe fitting; 41. Discharge pipe; 42. Discharge bin; 43. Rotating shaft; 44. Cutting plate; 45. Drive motor two; 46. Air blowing pipe; 47. Ring pipe; 48. Air nozzle two; 49. Support plate; 50. Air pump two; 51. Connecting pipe two; 52. Controller; 53. Frame. Detailed Implementation

[0023] The technical solution of the present invention will be further described in detail below with reference to specific embodiments.

[0024] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0025] A bag filter dust collector for treating sanding dust from wood-plastic composite boards, such as Figures 1-11 As shown, it includes a dust collection tank 1, which is divided into a purification chamber 2 and a dust collection chamber 3 by a partition 8. The purification chamber 2 is connected to an air outlet pipe 4, and the dust collection chamber 3 is connected to an air inlet pipe 5. It also includes several sets of filter bags 6, a dust collection mechanism, a separation component 7, and a discharge mechanism 9. Specifically, several sets of filter bags 6 are arranged on the partition plate 8. Each set of filter bags 6 includes several filter bags 6 arranged equidistantly along a straight line. The top opening of the filter bag 6 is connected to the purification chamber 2, and the bottom of the filter bag 6 extends into the dust removal chamber 3. Each filter bag 6 is equipped with a corresponding dust removal mechanism, which includes an external dust removal component and an internal dust removal component. The external dust removal component is used to remove dust from the outside of the filter bag 6, and the internal dust removal component is used to introduce high-pressure gas into the filter bag 6. The separator 7 is arranged in the dust removal chamber 3 and is located between the output end of the air inlet pipe 5 and the partition plate 8. The separator 7 is used to separate large-diameter dust particles from the gas introduced through the air inlet pipe 5. The airflow diverted by the separator 7 continues to flow towards the filter bag 6 and comes into contact with several sets of filter bags 6 arranged on the partition plate 8. When the airflow passes through the outer wall of the filter bag 6, pollutants such as wood-plastic fibers and fine plastic particles are intercepted and adsorbed by the filter bag 6 fabric and retained on the outer surface, gradually forming a dust layer. The purified clean gas passes through the inside of the filter bag 6, enters the purification chamber 2 through the top opening of the filter bag 6, and is then discharged through the air outlet pipe 4 connected to the purification chamber 2, completing the core filtration process. The discharge mechanism 9 is located at the bottom of the dust collection tank 1 and is used to remove dust particles accumulated at the bottom of the dust collection tank 1. In order for the operator to control the above structure, a corresponding controller 52 is installed on the device. In addition, a dust concentration sensor is installed inside the dust collection chamber 3 and a differential pressure sensor is installed between the dust collection chamber 3 and the purification chamber 2 to monitor the dust concentration and the pressure difference between the filter bag 6 in real time. The signals from the dust concentration sensor and the differential pressure sensor are connected to the controller 52 and a preset threshold is set. The controller 52 automatically adjusts the speed of the drive motor 26 and the air supply pressure of the air pump 38 according to the data transmitted by the dust concentration sensor and the differential pressure sensor. When the load is low, the frequency and pressure are reduced to save energy and avoid excessive wear of the filter bag 6.

[0026] The purification chamber 2 of the dust collector 1 is provided with an air guide pipe 35 corresponding to the drive shaft 25. The input end of the air guide pipe 35 extends to the outside of the dust collector 1 and is connected to the air tank 36 located outside the dust collector 1. The air tank 36 is installed on the outer wall of the dust collector 1 through the tank mounting plate 37. An air pump 38 is connected to the tank mounting plate 37. The output end of the air pump 38 is connected to the input end of the air tank 36 through the connecting pipe 39.

[0027] To clean the dust adhering to and agglomerated on the outside of filter bag 6; such as Figures 7-11As shown, the filter bag 6 is connected to the partition plate 8 via the frame 53, and the filter bag 6 is fitted outside the frame 53. The frame 53 always provides radial support for the filter bag 6, preventing the filter bag 6 from collapsing or deforming due to airflow pressure, ensuring the stability and airflow efficiency of the filtration channel, and providing a structural basis for subsequent dust removal. The external dust removal assembly includes an annular air box 10 fitted outside the filter bag 6, two ear plates 11 respectively connected to both sides of the annular air box 10, a lifting plate 13 connected to the ear plates 11, a gravity plate 14 connected to the ear plates 11, and a lifting plate 13 connected to the ear plates 11. 1. Corresponding lifting and traction components; wherein, two longitudinal slide rods 12 are respectively provided on both sides of the outside of the filter bag 6. One end of the longitudinal slide rod 12 is connected to the bottom of the partition plate 8. The output end of the annular air box 10 faces the filter bag 6, and the output end of the annular air box 10 forms an angle with the axial direction of the filter bag 6. The output end of the annular air box 10 forms an angle of 30°-45° with the axial direction of the filter bag 6. High-pressure gas is obliquely sprayed onto the outer surface of the filter bag 6. With the lifting and lowering motion, the filter bag 6 is fully covered and swept from top to bottom, forcibly peeling off the sticky dust agglomerates and fiber layers. The two ear plates 11 are slidably connected to the two longitudinal slide bars 12 respectively. The traction end of the lifting traction assembly drives the ear plates 11 to slide axially along the longitudinal slide bars 12 through the lifting plate 13. A counterweight block 15 is connected to the gravity plate 14. The lifting and traction assembly includes a winch 16 disposed in the purification chamber 2, a traction rope 18 wound on the winch 16, and a hook 17 connected to the lifting plate 13; wherein, one end of the traction rope 18 extends from the winch 16 through the partition 8 into the dust removal chamber 3 and is fixed to the hook 17. An elastic bushing 19 is connected to the partition 8 and sleeved on the outside of the traction rope 18. The traction rope 18 can pass through the elastic bushing 19 and abut against the inner wall of the elastic bushing 19. The main function of the elastic bushing 19 is to seal and prevent dust, so as to prevent gas leakage between the purification chamber 2 and the dust removal chamber 3. A return spring 20 is sleeved on the outside of the longitudinal slide bar 12. The two ends of the return spring 20 are connected to the lifting plate 13 and the partition plate 8 respectively. A ring scraper 21 is connected to the upper and lower surfaces of the ear plate 11. The ring scraper 21 is sleeved on the outside of the longitudinal slide bar 12, and the blade of the ring scraper 21 is in contact with the surface of the longitudinal slide bar 12. Several drive shafts 25 are rotatably connected inside the purification chamber 2. The drive shafts 25 correspond to several groups of filter bags 6 respectively. Each group of filter bags 6 is provided with a drive shaft 25. The winch 16 is connected to the drive shaft 25. One end of the drive shaft 25 extends through the dust collector 1 to the outside and is connected to the output end of the drive motor 26 located outside the dust collector 1. The drive motor 26 is installed on the outer wall of the dust collector 1 through the motor mounting plate 27.

[0028] In order to provide high-pressure air into the annular air chamber 10, so as to ensure that the airflow ejected from its output end is sufficient to blow away the dust adhering to the outside of the filter bag 6; such as Figures 7-11 As shown, a guide rod 22 is provided on one side of the filter bag 6 along its axial direction. One end of the guide rod 22 is connected to the bottom of the partition plate 8. A telescopic air pipe 23 is sleeved on the guide rod 22. The output end of the telescopic air pipe 23 is connected to the input end of the annular air box 10. The input end of the telescopic air pipe 23 extends through the partition plate 8 into the purification chamber 2 and is connected to a branch air pipe 24. The telescopic air pipe 23 and the partition plate 8 are sealed and fixedly connected.

[0029] When the dust layer on the outer surface of the filter bag 6 thickens and the filter pores of the filter bag 6 are blocked by fibers, the controller 52 triggers the dust removal mechanism to start. The external dust removal component and the internal dust removal component work together under the same drive system to achieve a dual dust removal effect of external blowing and peeling and internal impact unblocking. When the drive motor 26 starts, the drive shaft 25 drives the winch 16 to rotate. The traction rope 18 wound on the winch 16 extends downward through the elastic bushing 19 on the partition 8, and pulls the lifting plate 13 through the hook 17. This, in turn, drives the ear plate 11, which is fixedly connected to the lifting plate 13, to slide upward along the longitudinal slide bar 12. At this time, the return spring 20 outside the longitudinal slide bar 12 is compressed. The ear plate 11 is fixedly connected to the annular air box 10. The annular air box 10 rises synchronously along the filter bag 6 axis with the ear plate 11. At the same time, the air pump 38 starts and fills the air tank 36 with air through the connecting pipe 39. The high-pressure gas is diverted to the branch air pipe 24 through the air guide pipe 35. The branch air pipe 24 is connected to the interior of the air guide pipe 35. Then, through the telescopic air pipe 23 sleeved on the guide rod 22, the telescopic air pipe 23 extends and retracts synchronously with the rise and fall of the annular air box 10, ensuring the continuous introduction of gas into the annular air box 10. When the drive motor 26 reverses, the winch 16 releases the traction rope 18. The counterweight 15 on the gravity plate 14 and the elastic force of the return spring 20 work together to drive the ear plate 11 and the annular air box 10 to fall rapidly. The annular air box 10 continuously sprays high-pressure gas, forming a dual dust removal effect of rising blowing and falling impact. Meanwhile, the annular scraper 21 on the upper and lower surfaces of the ear plate 11 slides along the longitudinal slide bar 12 as the ear plate 11 rises and falls, scraping off the dust attached to the surface of the slide bar, avoiding sliding jamming, and ensuring smooth and stable lifting action.

[0030] In order to introduce high-pressure air into the filter bag 6 to keep the filter pores of the filter bag 6 in an air-permeable state; such as Figures 8-11As shown, the internal dust removal assembly includes a longitudinal air pipe 28 arranged along the axial direction of the filter bag 6, several air nozzles 29 connected to the longitudinal air pipe 28, and a branch air pipe 31 connected to the input end of the longitudinal air pipe 28 via a rotary air pipe connector 32. The rotary air pipe connector 32 can solve the problem of gas sealing and transportation when the longitudinal air pipe 28 rotates. The input end of the branch air pipe 31 is connected to the interior of the air guide pipe 35. Several air nozzles 29 are all arranged inside the filter bag 6. The filter bag 6 located inside the purification chamber 2 has a funnel-shaped ventilation component 30 inside. The ventilation component 30 has a through-hole at its center line that is suitable for the longitudinal air pipe 28 to pass through. The longitudinal air tube 28 rotates inside the filter bag 6 via a rotating bracket. A driven bevel gear 33 is connected to the end of the longitudinal air tube 28. A driving bevel gear 34 is connected to the drive shaft 25 at a position corresponding to the driven bevel gear 33. The driving bevel gear 34 meshes with the driven bevel gear 33. When the drive shaft 25 rotates, the driving bevel gear 34 meshes with it and drives the driven bevel gear 33 to rotate. The driven bevel gear 33 is fixedly connected to the longitudinal air tube 28 inside the filter bag 6. The longitudinal air tube 28 is rotatably installed at the center position of the filter bag 6 via the rotating bracket. Therefore, the longitudinal air tube 28 rotates at a uniform speed with the driven bevel gear 33. The high-pressure gas in the gas tank 36 is diverted to the branch gas pipe 31 through the air guide pipe 35, and then introduced into the longitudinal gas pipe 28 through the rotating gas pipe connector 32. It is then sprayed outwards through several air nozzles 29 evenly arranged along the longitudinal gas pipe 28. The rotating air nozzles 29 form an annular impact surface. The high-pressure gas impacts the inner wall of the filter bag 6 evenly from the inside outwards, which not only clears the filter holes blocked by fibers, but also causes the dust that has not been blown off the outside of the filter bag 6 to fall off through airflow vibration. This achieves synergistic dust removal of external stripping and internal unblocking, which greatly improves the dust removal efficiency.

[0031] To prevent larger particles from rubbing against the surface of filter bag 6 under the influence of airflow; such as Figure 2As shown, the separator 7 is a bucket-shaped structure with both ends open and equal wall thickness. The bottom of the separator 7 gradually narrows as it extends from its body towards the bottom of the dust collector 1. A straight pipe 40, coaxial with the axis of the dust collector 1, is connected to the bottom of the separator 7. A gap is left between the straight pipe 40 and the bottom of the dust collector 1. The output end of the air inlet pipe 5 is located outside the separator 7, and its extension direction is tangential to the dust collection chamber 3 inside the dust collector 1. The air introduced through the air inlet pipe 5 rotates along the side wall of the dust collector 1. And blocked by the outer wall of the separator 7, when the gas mixed with dust is introduced into the dust collector 1, it removes the larger dust particles mixed inside. The dust-laden gas (containing wood fiber, plastic particles, additives and large-particle impurities) generated by sanding wood-plastic board is introduced into the dust collector 3 at high speed through the air inlet pipe 5. The output end of the air inlet pipe 5 is tangential to the side wall of the dust collector 3. After the gas enters, it forms a stable cyclone airflow along the inner wall of the dust collector 3. The separator 7 located between the output end of the air inlet pipe 5 and the partition plate 8 plays a core pre-separation role. Specifically, after the cyclone airflow impacts the outer wall of the separator 7, it travels downwards along the outer side of the separator 7. Under the combined effects of centrifugal force, gravity, and airflow obstruction, large-diameter dust particles separate from the mainstream airflow and slide down the outer wall of the separator 7, eventually settling at the bottom of the dust collector 1. The airflow containing fine particles and fibers, after preliminary purification, enters the separator 7 through the straight pipe 40 and then contacts the filter bag 6, spreading smoothly towards the filter bag 6 area. This avoids the high-speed airflow directly impacting the filter bag 6 and causing wear.

[0032] To facilitate and continuously remove dust from inside dust collection tank 1; such as Figures 2-5 As shown, the discharge mechanism 9 includes a discharge pipe 41 connected to the bottom of the dust collector 1, a discharge hopper 42 located in the middle of the discharge pipe 41, a rotating shaft 43 rotatably connected to the discharge hopper 42, a cutting plate 44 equidistantly arranged on the rotating shaft 43 around its axis, and a second drive motor 45 installed outside the discharge hopper 42. The discharge hopper 42 has a cylindrical structure and is connected to the discharge pipe 41. The axis of the rotating shaft 43 coincides with the axis of the discharge hopper 42. One end of the rotating shaft 43 extends through the discharge hopper 42 to the outside and is connected to the output end of the second drive motor 45. The cutting plate 44 is in contact with the inner wall of the discharge hopper 42. An annular pipe 47 is connected to the outside of the side wall of the discharge end of the discharge pipe 41. An air blowing pipe 46 is connected to the output end of the annular pipe 47. The output end of the air blowing pipe 46 extends through the discharge pipe 41 into its interior and is connected to an air nozzle 48. The output end of the air nozzle 48 faces the interior of the discharge hopper 42. An air pump 50 is installed on the outer wall of the discharge pipe 41 through a support plate 49. The output end of the air pump 50 is connected to the input end of the annular pipe 47 through a connecting pipe 51.

[0033] All the dust that has been pre-separated and removed by cleaning accumulates at the bottom of the dust collection tank 1. The controller 52 triggers the discharge mechanism 9 to start, and continuous dust discharge is achieved through the synergy of mechanical scraping and airflow guidance. The drive motor 45, fixed to the outside of the discharge hopper 42, starts, driving the rotating shaft 43 to rotate. The cutting plates 44, evenly spaced along the circumference of the rotating shaft 43, are in close contact with the inner wall of the discharge hopper 42. As the rotating shaft 43 rotates, the cutting plates 44 rotate around the axis of the rotating shaft 43. A hopper for collecting dust is formed between two adjacent cutting plates 44. When this hopper is connected to the bottom of the dust collector 1, the dust accumulated at the bottom of the dust collector 1 falls into the hopper. Driven by the rotating shaft 43, the hopper moves towards the output end of the discharge pipe 41. When the hopper reaches the output end of the discharge pipe 41 and... When connected, the dust in the hopper is poured into the discharge pipe 41 under the action of gravity, and is finally discharged from the output end of the discharge pipe 41. At the same time, in order to prevent dust from adhering to the cutting plate 44, the second air pump 50 is started, and air is supplied to the annular pipe 47 through the second connecting pipe 51. The high-pressure gas is introduced into the second air nozzle 48 through the air blowing pipe 46. The output end of the second air nozzle 48 is directed towards the connection between the discharge bin 42 and the discharge pipe 41. The jet airflow impacts the cutting plate 44 and blows off the dust adhering to the cutting plate 44, ensuring that the dust is continuously and without retention discharged from the discharge pipe 41, and there is no need to stop the machine to clean the dust on the cutting plate 44.

[0034] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A baghouse dust collector for treating sanding dust from wood-plastic composite boards, comprising a dust collection tank (1), wherein the dust collection tank (1) is divided into a purification chamber (2) and a dust collection chamber (3) by a partition (8), the purification chamber (2) is connected to an air outlet pipe (4), and the dust collection chamber (3) is connected to an air inlet pipe (5), characterized in that, Also include: A plurality of filter bags (6) are arranged on the partition plate (8), each group of filter bags (6) includes a plurality of filter bags (6) arranged equidistantly along a straight line, the top opening of the filter bag (6) is connected with the purification cavity (2), and the bottom of the filter bag (6) extends into the dust removal cavity (3); A dust removal mechanism is arranged corresponding to each filter bag (6), the dust removal mechanism includes an outer dust removal assembly and an inner dust removal assembly, the outer dust removal assembly is used for removing dust outside the filter bag (6), and the inner dust removal assembly is used for introducing high-pressure gas into the filter bag (6); A separation piece (7) is arranged in the dust removal cavity (3) and located between the output end of the air inlet pipe (5) and the partition plate (8), and the separation piece (7) is used for separating large particle size dust particles from the gas introduced through the air inlet pipe (5); A discharge mechanism (9) is arranged at the bottom of the dust removal tank (1) and is used for discharging dust particles accumulated at the bottom of the dust removal tank (1).

2. The cloth bag dust collector for polishing dust treatment of a wood-plastic board according to claim 1, characterized in that, The filter bag (6) is connected to the partition plate (8) through a framework (53), and the filter bag (6) is sleeved outside the framework (53), the outer dust removal assembly includes a ring-shaped air tank (10) sleeved outside the filter bag (6), two ear plates (11) connected to the two sides of the ring-shaped air tank (10), a lifting plate (13) connected to the ear plate (11), a gravity plate (14) connected to the ear plate (11), and a lifting traction assembly corresponding to the ear plate (11); wherein the two sides of the filter bag (6) are respectively provided with two longitudinal sliding rods (12), one end of the longitudinal sliding rod (12) is connected to the bottom of the partition plate (8), the output end of the ring-shaped air tank (10) faces the filter bag (6), and the direction of the output end of the ring-shaped air tank (10) forms an included angle with the axial direction of the filter bag (6), the two ear plates (11) are slidably connected between the two longitudinal sliding rods (12), the traction end of the lifting traction assembly drives the ear plate (11) to slide along the longitudinal sliding rod (12) through the lifting plate (13), and the gravity plate (14) is connected with a counterweight (15).

3. The cloth bag dust collector for polishing dust treatment of a wood-plastic board according to claim 2, characterized in that, The lifting traction assembly includes a winch (16) arranged in the purification cavity (2), a traction rope (18) wound on the winch (16), and a hook (17) connected to the lifting plate (13); wherein one end of the traction rope (18) extends from the winch (16) to the dust removal cavity (3) through the partition plate (8) and is fixed to the hook (17), the partition plate (8) is connected with an elastic bushing (19) sleeved outside the traction rope (18), the traction rope (18) can penetrate the elastic bushing (19) and abut against the inner wall of the elastic bushing (19); The outer part of the longitudinal slide rod (12) is sleeved with a reset spring (20), two ends of the reset spring (20) are connected with the lifting plate (13) and the partition plate (8) respectively; the upper surface and the lower surface of the ear plate (11) are connected with annular scrapers (21), the annular scrapers (21) are sleeved on the outer part of the longitudinal slide rod (12), and the cutting edges of the annular scrapers (21) are in contact with the surface of the longitudinal slide rod (12).

4. The cloth bag dust collector for polishing dust treatment of a wood-plastic board according to claim 3, characterized in that, One side of the filter bag (6) is provided with a guide rod (22) along the axial direction, one end of the guide rod (22) is connected to the bottom of the partition plate (8), a telescopic air pipe (23) is sleeved on the guide rod (22), the output end of the telescopic air pipe (23) is connected with the input end of the annular air tank (10), the input end of the telescopic air pipe (23) extends into the purification cavity (2) through the partition plate (8) and is connected with a branch air pipe (24), and the telescopic air pipe (23) and the partition plate (8) are sealingly and fixedly connected.

5. The cloth bag dust collector for polishing dust treatment of a wood-plastic board according to claim 4, characterized in that, A plurality of drive shafts (25) are rotatably connected in the purification cavity (2), the plurality of drive shafts (25) correspond to a plurality of groups of filter bags (6), one drive shaft (25) is arranged corresponding to each group of filter bags (6), the capstan (16) is connected to the drive shaft (25), one end of the drive shaft (25) extends to the outside through the dust removal tank (1) and is connected with the output end of the driving motor (26) arranged outside the dust removal tank (1), and the driving motor (26) is installed on the outer wall of the dust removal tank (1) through the motor mounting plate (27).

6. The cloth bag dust collector for polishing dust treatment of a wood-plastic board according to claim 5, characterized in that, The inner dust removal assembly comprises a longitudinal air pipe (28) arranged along the axial direction of the filter bag (6), a plurality of air nozzles (29) in communication with the longitudinal air pipe (28), and a branch air pipe (31) connected with the input end of the longitudinal air pipe (28) through a rotary air pipe joint (32); wherein the plurality of air nozzles (29) are arranged inside the filter bag (6), a ventilating member (30) in the shape of a bucket is arranged inside one end of the filter bag (6) located inside the purification cavity (2), and a ventilating hole is formed in the center line of the ventilating member (30) and adapted for the longitudinal air pipe (28) to pass through; The longitudinal air pipe (28) is rotatable in the filter bag (6) through a rotary support, a driven bevel gear (33) is connected to the end of the longitudinal air pipe (28), a driving bevel gear (34) is connected to the corresponding position of the drive shaft (25) corresponding to the driven bevel gear (33), and the driving bevel gear (34) is engaged with the driven bevel gear (33).

7. The cloth bag dust collector for polishing dust treatment of a wood-plastic board according to claim 6, characterized in that, The purification cavity (2) of the dust removal tank (1) is provided with a gas guide pipe (35) corresponding to the driving shaft (25), the input ends of the branch gas pipe one (24) and the branch gas pipe two (31) are in communication with the inside of the gas guide pipe (35), the input end of the gas guide pipe (35) extends to the outside of the dust removal tank (1) and is in communication with the gas tank (36) arranged outside the dust removal tank (1), the gas tank (36) is installed on the outer wall of the dust removal tank (1) through the tank body mounting plate (37), the gas pump one (38) is connected to the tank body mounting plate (37), and the output end of the gas pump one (38) is connected to the input end of the gas tank (36) through the communication pipe one (39).

8. The cloth bag dust collector for polishing dust treatment of a wood-plastic board according to claim 7, characterized in that, The separation piece (7) is a bucket-shaped structure with equal wall thickness at both ends, and when the bottom of the separation piece (7) extends from the body to the bottom of the dust removal tank (1), the inner diameter thereof is tapered, and the bottom of the separation piece (7) is connected to a straight pipe (40) coaxially arranged with the axis of the dust removal tank (1).

9. The cloth bag dust collector for polishing dust treatment of a wood-plastic board according to claim 1, characterized in that, The discharge mechanism (9) comprises a discharge pipe (41) in communication with the bottom of the dust removal tank (1), a discharge bin (42) arranged at the middle position of the discharge pipe (41), a rotating shaft (43) rotatably connected to the discharge bin (42), a cutting plate (44) equidistantly arranged on the rotating shaft (43) around the axis of the rotating shaft (43), and a driving motor two (45) mounted outside the discharge bin (42); wherein the discharge bin (42) is a cylindrical structure, the discharge bin (42) is in communication with the discharge pipe (41), the axis of the rotating shaft (43) coincides with the axis of the discharge bin (42), one end of the rotating shaft (43) extends to the outside through the discharge bin (42) and is connected to the output end of the driving motor two (45), and the cutting plate (44) is in contact with the inner wall of the discharge bin (42).

10. The cloth bag dust collector for polishing dust treatment of a wood-plastic board according to claim 9, characterized in that, The outer wall of the output end of the discharge pipe (41) is connected to an annular pipe (47), the output end of the annular pipe (47) is connected to a blowing pipe (46), the output end of the blowing pipe (46) extends to the inside of the discharge pipe (41) and is connected to a gas nozzle two (48), the output end of the gas nozzle two (48) faces the inside of the discharge bin (42), a gas pump two (50) is mounted on the outer wall of the discharge pipe (41) through a support plate (49), and the output end of the gas pump two (50) is connected to the input end of the annular pipe (47) through a communication pipe two (51).

Images