A wood processing dust removal device for bio-based construction material production

Abstract

The application relates to the dust removal technical field and discloses a wood processing dust removal device for bio-based building material production, which comprises an air inlet pipe, a box body, an air outlet pipe and a partition plate. When pulse spraying gas impacts filter cloth two, sliding disc descends to drive a push strip to expand filter cloth one radially. At this time, filter cloth one and filter cloth two are synchronously reduced in axial draft hole diameter, filter cloth one separates the inner cavity of the cloth bag into upper and lower parts, and residual upward airflow can only pass through filter cloth holes; bottom residual compressed air rises to contact filter cloth one, flows along the surface of the filter cloth one to the edge, and the flow rate is reduced by more than 40%, and large-particle dust is pre-settled; the dust accumulation caused by the high-speed flow of residual gas and dust in the inner cavity to the bag opening when the cloth bag rebounds after pulse spraying is effectively slowed down, and the service life of the cloth bag is prolonged.

Description

Technical Field

[0001] This invention relates to the field of dust removal technology, specifically to a dust removal device for wood processing in the production of bio-based building materials. Background Technology

[0002] Bio-based building materials are green building materials made from biomass resources such as wood, bamboo, and straw through mechanical processing, gluing, and molding. They are increasingly widely used in the fields of engineered wood panels and wood-based structures. The processes of cutting, crushing, sanding, and polishing wood generate a large amount of wood dust, which is commonly treated by pulse-jet bag filters in the industry.

[0003] When the pulse jet cleaning ends, the filter bag contracts and rebounds rapidly under the drive of elastic restoring force. The residual gas inside the cavity is compressed and rushes out at high speed along the bag opening, carrying with it the fine wood dust shaken off during cleaning. Some of the dust gradually accumulates in the narrow annular gap at the bag opening, forming a dust accumulation layer. In subsequent pulse jet cycles, the bag opening repeatedly expands and contracts with the pulse action. Its inner wall generates high-frequency abrasive friction with the hard wood dust particles in this accumulation layer, causing the bag opening area to gradually thin and significantly shortening the service life of the filter bag. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a dust removal device for wood processing in the production of bio-based building materials, including an inlet pipe, a box, an outlet pipe, a partition, a pulse emitter, a spray pipe, a bag frame, a fixing mechanism, an unfolding mechanism, and a sliding mechanism. One end of the inlet pipe is fixedly connected to the side wall of the box and communicates with the inside of the box. One end of the outlet pipe is fixedly connected to the top of the box and communicates with the inside of the box. The outer wall of the box is fixedly connected to the outer wall of the pulse emitter. The inner wall of the box is fixedly connected to the outer wall of the partition. The end of the pulse emitter near the inner wall of the box is fixedly connected to the end of the spray pipe away from the partition. The partition has several mounting holes, and the bag frame is fixedly installed in the corresponding mounting holes. The outer wall of the fixing mechanism is fixedly set to the inner bottom of the bag frame. The outer wall of the unfolding mechanism is fixedly set to the outer wall of the fixing mechanism. The outer wall of the sliding mechanism is fixedly set to the inner wall of the fixing mechanism. The device also includes: The fixing mechanism includes a fixing component and a telescopic component. The fixing component includes a connecting rod and a fixing plate, and the telescopic component includes a spring and a sliding plate. The end of the fixing component away from the partition is fixed to the inner wall of the bottom of the bag frame, and the outer wall of the telescopic component is slidably connected to the outer wall of the fixing component. The unfolding mechanism includes an unfolding component and a rotating component. The sliding component includes a fixed block, and the moving component includes a slider. The outer wall of the unfolding component and the outer wall of the telescopic component are fixedly arranged, and the outer wall of the rotating component and the outer wall of the unfolding component are fixedly arranged. The sliding mechanism includes a sliding component and a moving component. The outer wall of the sliding component and the inner wall of the telescopic component are fixed, while the outer wall of the moving component and the inner wall of the sliding component are slidably connected.

[0005] Preferably, the fixing component includes a connecting rod and a fixing plate. The end of the connecting rod away from the partition is fixedly connected to the inner wall of the bottom of the bag frame, and the inner wall of the fixing plate is fixedly connected to the outer wall of the connecting rod.

[0006] Preferably, the telescopic component includes a spring and a sliding disc. The top end of the spring is fixedly connected to the bottom surface of the fixed disc, and the bottom end is fixedly connected to the top surface of the sliding disc. The sliding disc can slide axially along the outer wall of the connecting rod, compressing the spring and accumulating elastic potential energy. The spring is a stainless steel compression spring with a wire diameter of 0.8-1.2mm, an initial pre-compression of 5-8mm, and a stiffness matched to a pulse jet pressure of 0.5-0.7MPa to ensure that it can completely descend during jetting without affecting the expansion and dust removal effect of the bag body.

[0007] Preferably, the unfolding assembly includes filter cloth one, several elastic strips, a fixing ring, several push strips, and filter cloth two; the inner edge of filter cloth one is fixedly connected to the outer wall of the sliding disk, and the outer edge of filter cloth one is fixedly connected to the inner wall of the fixing ring; several elastic strips are evenly distributed along the circumference, with their top ends fixedly connected to the bottom surface of the sliding disk and their bottom ends fixedly connected to the top surface of the fixing ring; the elastic strips are initially curved in an arc shape towards the axis of the connecting rod, and gradually straighten and expand outward when subjected to axial tension; the inner end of the push strip is fixed at the top of the curved arc of the elastic strip, and the outer end is fixed radially outward to the inner wall of the middle section of the pleats of filter cloth one, and the filter cloth one is radially expanded by the push strip when the elastic strip is straightened; the outer edge of filter cloth two is fixedly connected to the inner wall of the fixing ring, and the inner edge of the filter cloth two is fixedly connected to the outer wall of the connecting rod, located above filter cloth one, and the outer edge of filter cloth one is edged with a wear-resistant nylon strip to reduce frictional wear on the inner wall of the bag during unfolding and shrinking.

[0008] Preferably, the top surface of the fixing ring 313 is provided with several guide vanes along the circumference. The guide vanes are inclined toward the side wall of the bag to guide the rising airflow to the inner wall of the middle of the bag and prevent the airflow from directly scouring the bag opening area.

[0009] Preferably, the sliding assembly includes a fixed block, an arc-shaped groove, an elastic plate, and a push block. The top of the sliding disk is fixedly connected to the bottom of several fixed blocks, the side wall of the fixed block is fixedly connected to the side wall of the push block, the fixed block is fixedly connected to the side wall of the elastic plate, and several arc-shaped grooves are provided on the inner wall of the fixed block.

[0010] Preferably, the motion component includes a slider fixed to the outer wall of the connecting rod, a horizontal guide groove inside the slider, a positioning block slidably installed in the guide groove, and a pushing block rotatably connected to the positioning block. The rotational mating surfaces of the two are interference fit to provide rotational resistance. A bending plate and a limiting plate are also fixed inside the slider. When the sliding disk rebounds upward, the pushing block pushes the pushing block to rotate and move horizontally, squeezing the bending plate into the arc-shaped groove, forming damping to delay the reset of the sliding disk.

[0011] The bending plate is made of 65Mn spring steel sheet with a thickness of 0.3mm. The interference between the positioning block and the pushing block is 0.05-0.08mm to ensure that the maximum static friction force is greater than the natural rebound force of the bending plate and less than the deformation thrust of the elastic plate.

[0012] Preferably, filter cloth one and filter cloth two have a radially stretchable pleated structure. When filter cloth one is fully unfolded, its outer edge fits against the inner wall of the bag. The initial pore size of filter cloth two is larger than that of filter cloth one. Both are woven with a twill weave with 20% elastic spandex yarn in the weft direction and polyester industrial yarn in the warp direction. The weft density is 280 yarns / 10cm, and the pleats are heat-pressed and shaped. When subjected to axial stretching, the warp and weft yarns are interlaced and squeezed, and the pore size shrinks synchronously with the increase of stretching. Filter cloth one is a microporous filter cloth, allowing only less than 30% of the airflow to pass through, and the remaining airflow is guided along the surface of the filter cloth to the side wall of the bag. The surface of filter cloth one is coated with a polytetrafluoroethylene water-repellent and oil-repellent coating, which, together with the pulse jet airflow, achieves self-cleaning of the surface and avoids micropore clogging.

[0013] Preferably, the elastic plate in the sliding assembly is initially in a compressed state.

[0014] The present invention has the following beneficial effects: (1) In this invention, by setting up filter cloth one, when the pulse jet gas impacts filter cloth two, the sliding disc moves downward and drives the pusher strip to radially expand filter cloth one through the deformation of the elastic strip. At this time, filter cloth one and filter cloth two are axially stretched and the aperture of the filter cloth one is reduced synchronously. Filter cloth one separates the inner cavity of the bag from top to bottom, and the residual rising airflow can only flow through the filter cloth holes; the residual compressed air at the bottom rises and contacts filter cloth one and flows along its surface to the edge, and the flow velocity is reduced by more than 40%, and large particles of dust are pre-settled; effectively reducing the dust accumulation and wear caused by the residual gas in the inner cavity carrying dust rushing to the bag opening at high speed when the bag rebounds after the pulse jet, and extending the service life of the bag.

[0015] (2) By setting a fixed block, when the speed of the sliding disk slows down, the recovery speed of filter cloth one will also slow down, thereby extending the unfolded state of filter cloth one. This method prevents filter cloth one from quickly resetting when the subsequent gas disappears, thereby reopening the originally separated channel and causing a large amount of gas carrying particles to enter the upper part of the partition.

[0016] (3) By setting a curved plate, when the blowing intensity is low and the dust concentration is low, the curved plate cannot be locked into the arc groove, and the sliding disc is quickly reset under the action of the spring, reducing the tensile fatigue of the filter cloth. When the blowing intensity is high and the dust concentration is high, the push block pushes the curved plate into the arc groove, the sliding disc rebounds and decelerates, extending the separation state of the filter cloth and preventing high-concentration dust from rushing to the bag opening quickly. The higher the blowing intensity, the faster the sliding disc descends and the greater the stroke, the stronger the initial impact kinetic energy of the push block when it rebounds, and the easier it is to push the push block to squeeze the curved plate into the arc groove. Conversely, the impact kinetic energy is insufficient under low-intensity blowing, and the locking cannot be triggered, thus achieving adaptive matching of the damping effect.

[0017] (4) By setting up a sliding disc and filter cloth two, the pulsed airflow changes its direction after passing through filter cloth two and flows out radially to both sides along filter cloth one, acting evenly on the side wall of the bag, avoiding the pulsed airflow directly concentrating to impact the bottom seam of the bag, and reducing the risk of bottom damage. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the top structure of the present invention; Figure 3 This is a schematic diagram of the overall structure of the partition of the present invention; Figure 4 For the present invention Figure 3 Enlarged view of point D; Figure 5 This is a schematic diagram showing the distribution of the rotating plates in this invention; Figure 6 For the present invention Figure 5 Enlarged view of point B in the middle; Figure 7 This is a schematic diagram of the overall structure of the telescopic component of the present invention; Figure 8 For the present invention Figure 7 Enlarged diagram of point A in the middle.

[0020] The attached diagram lists the components represented by each number as follows: In the diagram: 12. Inlet pipe; 13. Housing; 14. Outlet pipe; 15. Partition; 16. Pulse transmitter; 17. Nozzle; 18. Bag holder; 2. Fixing mechanism; 21. Fixing assembly; 211. Connecting rod; 212. Fixing plate; 22. Telescopic assembly; 221. Spring; 222. Sliding plate; 3. Deployment mechanism; 31. Deployment assembly; 311. Filter cloth one; 312. Elastic strip; 313. Fixed... 314. Fixed ring; 315. Push bar; 32. Filter cloth II; 32. Rotating assembly; 321. Pull bar; 322. Connecting bar; 323. Rotating plate; 4. Sliding mechanism; 41. Sliding assembly; 411. Fixed block; 412. Arc groove; 413. Elastic plate; 414. Push block; 42. Motion assembly; 421. Slider; 422. Positioning block; 423. Pushing block; 424. Limiting plate; 425. Bending plate. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example 1, please refer to Figures 1-7 This invention relates to a dust removal device for wood processing in the production of bio-based building materials, comprising an inlet pipe 12, a housing 13, an outlet pipe 14, a partition 15, a pulse emitter 16, a spray pipe 17, a bag holder 18, a fixing mechanism 2, an unfolding mechanism 3, and a sliding mechanism 4. One end of the inlet pipe 12 is fixedly connected to the side wall of the housing 13 and communicates with the interior of the housing 13. One end of the outlet pipe 14 is fixedly connected to the top of the housing 13 and communicates with the interior of the housing 13. The outer wall of the housing 13 is fixedly connected to the outer wall of the pulse emitter 16. The inner wall of the housing 13 is fixedly connected to the outer wall of the partition 15. The end of the pulse transmitter 16 near the inner wall of the housing 13 is fixedly connected to the end of the nozzle 17 away from the partition 15. The partition 15 has several mounting holes, and the bag holder 18 is fixedly installed in the corresponding mounting holes. The outer wall of the fixing mechanism 2 is fixedly connected to the inner bottom of the bag holder 18. The outer wall of the unfolding mechanism 3 is fixedly connected to the outer wall of the fixing mechanism 2. The outer wall of the sliding mechanism 4 is fixedly connected to the inner wall of the fixing mechanism 2. The system also includes: The fixing mechanism 2 includes a fixing component 21 and a telescopic component 22. The end of the fixing component 21 away from the partition 15 is fixedly set to the bottom inner wall of the bag frame 18, and the outer wall of the telescopic component 22 is slidably set to the outer wall of the fixing component 21. The unfolding mechanism 3 includes an unfolding component 31 and a rotating component 32. The outer wall of the unfolding component 31 is fixedly set to the outer wall of the telescopic component 22, and the outer wall of the rotating component 32 is fixedly set to the outer wall of the unfolding component 31. The sliding mechanism 4 includes a sliding component 41 and a moving component 42. The outer wall of the sliding component 41 is fixed to the inner wall of the telescopic component 22, while the outer wall of the moving component 42 is slidably connected to the inner wall of the sliding component 41.

[0023] Example 2, please refer to Figures 2-8 The present invention is a dust removal device for wood processing in the production of bio-based building materials. Based on the first embodiment, the fixing component 21 includes a connecting rod 211 and a fixing plate 212. The end of the connecting rod 211 away from the partition 15 is fixedly connected to the inner wall of the bottom of the bag frame 18, and the inner wall of the fixing plate 212 is fixedly connected to the outer wall of the connecting rod 211.

[0024] The telescopic assembly 22 includes a spring 221 and a sliding disc 222. The end of the spring 221 away from the partition 15 is fixedly connected to the side of the fixed disc 212 near the sliding disc 222. The side of the sliding disc 222 away from the partition 15 is fixedly connected to the end of the spring 221 near the partition 15. Among them, the sliding disk 222 can slide axially along the outer wall of the connecting rod 211, and cause the spring 221 to be deformed and accumulate elastic potential energy.

[0025] The unfolding assembly 31 includes a first filter cloth 311, several elastic strips 312, a fixing ring 313, several push strips 314, and a second filter cloth 315. The inner edge of the first filter cloth 311 is fixedly connected to the outer wall of the sliding disk 222, and the outer edge of the first filter cloth 311 is fixedly connected to the inner wall of the fixing ring 313. Several elastic strips 312 are evenly distributed around the circumference, with their top ends fixedly connected to the bottom surface of the sliding disk 222 and their bottom ends fixedly connected to the top surface of the fixing ring 313. The elastic strips 312 are initially curved towards the axis of the connecting rod 211 and are subjected to axial tension. When the force is applied, it gradually straightens and expands outward; the inner end of the push bar 314 is fixed to the curved top of the elastic bar 312, and the outer end is fixed radially outward to the inner wall of the middle section of the filter cloth 311. When the elastic bar 312 is straightened, the filter cloth 311 is radially expanded by the push bar; the outer edge of the filter cloth 315 is fixedly connected to the inner wall of the fixing ring 313, and the inner edge is fixedly connected to the outer wall of the connecting rod 211. It is located above the filter cloth 311. The outer edge of the filter cloth 311 is edged with a wear-resistant nylon strip to reduce the friction loss on the inner wall of the bag when it is unfolded and contracted.

[0026] The top surface of the fixing ring 313 is provided with several guide vanes along the circumference. The guide vanes are inclined towards the side wall of the bag to guide the rising airflow to the inner wall of the middle of the bag and prevent the airflow from directly scouring the bag opening area.

[0027] The sliding assembly 41 includes a fixed block 411, an arc groove 412, an elastic plate 413, and a push block 414. The top of the sliding disk 222 is fixedly connected to the bottom of several fixed blocks 411. The side wall of the fixed block 411 is fixedly connected to the side wall of the push block 414. The fixed block 411 is fixedly connected to the side wall of the elastic plate 413. Several arc grooves 412 are provided on the inner wall of the fixed block 411.

[0028] The motion component 42 includes a slider 421, a positioning block 422, a pushing block 423, a limiting plate 424, and a bending plate 425. The slider 421 is fixedly connected to the outer wall of the connecting rod 211. A horizontal guide groove is provided inside the slider 421. The top of the bending plate 425 is fixed to the inner wall of the slider 421, and the limiting plate 424 is fixed to the inner wall of the slider 421. The pushing block 423 is slidably installed in the guide groove through the positioning block 422. The rotating mating surfaces of the positioning block 422 and the pushing block 423 are interference fits. The maximum static friction between the two is greater than the natural rebound force of the bending plate 425 and less than the deformation thrust of the elastic plate 413. By setting the bending plate 425, when the blowing intensity is low, the bending plate 425 cannot be locked into the arc groove 412, and the sliding disk 222 quickly drives the filter cloth 311 to reset under the action of the spring 221; when the blowing intensity is high, the push block 414 pushes the push block 423 to rotate and move horizontally, squeezing the bending plate 425 into the arc groove 412, and the sliding disk 222 rebounds and decelerates, extending the separation state of the filter cloth 311; when the dust concentration is low, the rapid reset can reduce the elastic fatigue of the filter cloth, and when the concentration is high, the long-term separation can reduce the dust accumulation at the bag mouth.

[0029] Filter cloth 311 and filter cloth 315 have a radially stretchable pleated structure. When filter cloth 311 is fully unfolded, its outer edge fits against the inner wall of the bag. The initial pore size of filter cloth 315 is larger than that of filter cloth 311. Both are woven with a twill weave with 20% elastic spandex yarn in the weft direction and polyester industrial yarn in the warp direction. The weft density is 280 yarns / 10cm. The pleats are heat-pressed and shaped. When subjected to axial stretching, the warp and weft yarns are interlaced and squeezed, and the pore size shrinks synchronously with the increase of stretching. Filter cloth 311 is a microporous filter cloth, allowing only less than 30% of the airflow to pass through. The remaining airflow is guided along the surface of the filter cloth to the side wall of the bag. The surface of filter cloth 311 is coated with a polytetrafluoroethylene water-repellent and oil-repellent coating. Combined with pulse jet airflow, it achieves self-cleaning of the surface and avoids micropore clogging.

[0030] The elastic plate 413 in the sliding component 41 is initially in a compressed state.

[0031] One specific application of this embodiment is: before starting work, the operator first connects the external fan to the air inlet pipe 12 and puts the cloth bag into the outer wall of the cloth bag frame 18.

[0032] At the start of operation, the external fan is activated to allow exhaust gas to enter the housing 13. The gas entering the housing 13 comes into contact with the filter bags on the filter bag rack 18. The filter bags isolate impurities in the gas on their outer walls, allowing relatively clean gas to enter the filter bags. After a period of time, the operator activates the pulse transmitter 16, causing the gas ejected by the pulse transmitter 16 to enter the inner walls of multiple filter bags through the nozzle 17. As the gas flows out, the pulse jet airflow impacts the surface of the filter cloth 315 from top to bottom, creating a downward pneumatic thrust that drives the fixing ring 313 downward. The fixing ring 313 pulls the elastic strip 312 to gradually straighten, while simultaneously causing the sliding disc 222 to slide downward along the connecting rod 211 to compress the spring. The deformed elastic strip 312 radially expands the filter cloth 311 through the pusher 314, causing the outer edge of the filter cloth 311 to adhere to the inner wall of the filter bag, thus separating the inner cavity of the filter bag vertically.

[0033] When the sliding disk 222 slides, the fixed ring 313 will slide. When the sliding disk 222 rebounds upward, the push block 414 contacts the push block 423, and the push block 423 rotates around the positioning block 422 until it abuts against the limiting plate 424. The push block 414 continues to apply pressure, causing the push block 423 to drive the positioning block 422 to move horizontally along the guide groove, squeezing the bending plate 425 to bend and get stuck in the arc groove 412. Since the interference friction between the positioning block 422 and the push block 423 is greater than the rebound force of the bending plate 425, the bending plate 425 remains in the locked state, forming damping on the sliding disk 222. When the blowing airflow weakens, the spring 221 releases elastic potential energy to drive the sliding disk 222 to slowly move upward and reset.

[0034] At this time, the bending plate 425 is in close contact with the inner wall of the arc groove 412, restricting the upward movement of the fixed block 411, which slows down the rebound speed of the sliding plate 222 and extends the separation state of the filter cloth 311. When the sliding plate 222 moves up to the point where the elastic plate 413 contacts the pushing block 423, the elastic plate 413 is deformed under pressure. After reaching the threshold, it pushes the pushing block 423 to slide and rotate in the opposite direction. The bending plate 425 rebounds and disengages from the arc groove 412, the damping is released, and the sliding plate 222 quickly returns to the initial position.

[0035] By setting filter cloth 311, when the pulse jet gas impacts filter cloth 315, the sliding disc 222 moves downward and drives the pusher 314 to radially expand filter cloth 311 through the deformation of the elastic strip 312. At this time, the pore diameter of filter cloth 311 and filter cloth 315 is reduced synchronously due to axial stretching. Filter cloth 311 separates the inner cavity of the bag from top to bottom, and the residual rising airflow can only flow through the filter cloth pores. The residual compressed air at the bottom rises and contacts filter cloth 311 and flows along its surface to the edge, reducing the flow velocity by more than 40%. Large dust particles pre-settle, effectively reducing dust accumulation and wear caused by the residual gas in the inner cavity carrying dust rushing to the bag opening at high speed when the bag rebounds after the pulse jet, thus extending the service life of the bag.

[0036] By setting up the sliding disc 222, when the gas enters the interior of the filter cloth 311 through the filter cloth 2 315, the gas that was originally gathering towards the center will change its flow direction, causing the gas to flow out to both sides of the filter cloth 311 to clean the bag. In this way, the gas is prevented from directly impacting the bottom of the bag, which could lead to the risk of the bottom seam of the bag breaking after long-term use.

[0037] By setting the bending plate 425, when the blowing intensity is low, the bending plate 425 cannot be locked into the arc groove 412, and the sliding disk 222 quickly drives the filter cloth 311 to reset under the action of the spring 221; when the blowing intensity is high, the push block 414 pushes the push block 423 to rotate and move horizontally, squeezing the bending plate 425 into the arc groove 412, and the sliding disk 222 rebounds and decelerates, extending the separation state of the filter cloth 311; when the dust concentration is low, the rapid reset can reduce the elastic fatigue of the filter cloth, and when the concentration is high, the long-term separation can reduce the dust accumulation at the bag mouth.

[0038] By setting up the sliding disc 222 and the filter cloth 315, the pulsed airflow changes direction after passing through the filter cloth 315 and flows out radially to both sides along the filter cloth 311, acting evenly on the side wall of the bag, avoiding the pulsed airflow from directly impacting the bottom seam of the bag and reducing the risk of bottom damage.

[0039] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A dust removal device for wood processing in the production of bio-based building materials, comprising an inlet pipe (12), a housing (13), an outlet pipe (14), a partition (15), a pulse transmitter (16), a nozzle (17), a bag holder (18), a fixing mechanism (2), an unfolding mechanism (3), and a sliding mechanism (4). One end of the inlet pipe (12) is fixedly connected to the side wall of the housing (13) and communicates with the interior of the housing (13). One end of the outlet pipe (14) is fixedly connected to the top of the housing (13) and communicates with the interior of the housing (13). The outer wall of the housing (13) is fixedly connected to the outer wall of the pulse transmitter (16). The inner wall of the box (13) is fixedly connected to the outer wall of the partition (15), and the end of the pulse transmitter (16) near the inner wall of the box (13) is fixedly connected to the end of the nozzle (17) away from the partition (15). The partition (15) has several mounting holes, and the bag frame (18) is fixedly installed in the corresponding mounting holes. The outer wall of the fixing mechanism (2) is fixedly set to the inner bottom of the bag frame (18). The outer wall of the unfolding mechanism (3) is fixedly set to the outer wall of the fixing mechanism (2), and the outer wall of the sliding mechanism (4) is fixedly set to the inner wall of the fixing mechanism (2). The characteristic of this design is that... Also includes: The fixing mechanism (2) includes a fixing component (21) and a telescopic component (22). The fixing component (21) includes a connecting rod (211) and a fixing plate (212). The telescopic component (22) includes a spring (221) and a sliding plate (222). The end of the fixing component (21) away from the partition (15) is fixedly connected to the bottom inner wall of the bag frame (18). The outer wall of the telescopic component (22) is slidably disposed with the outer wall of the fixing component (21). The unfolding mechanism (3) includes an unfolding component (31) and a rotating component (32). The outer wall of the unfolding component (31) and the outer wall of the telescopic component (22) are fixedly arranged, and the outer wall of the rotating component (32) is fixedly connected to the outer wall of the unfolding component (31). The sliding mechanism (4) includes a sliding component (41) and a motion component (42). The sliding component (41) includes a fixed block (411), and the motion component (42) includes a slider (421). The outer wall of the sliding component (41) is fixedly connected to the inner wall of the telescopic component (22), and the outer wall of the motion component (42) is slidably connected to the inner wall of the sliding component (41).

2. The dust removal device for wood processing in the production of bio-based building materials according to claim 1, characterized in that: The fixing plate (212) is fixedly sleeved on the upper outer wall of the connecting rod (211) and located below the bottom of the bag frame (18).

3. The dust removal device for wood processing in the production of bio-based building materials according to claim 2, characterized in that: The telescopic assembly (22) includes a spring (221) and a sliding disc (222); the spring (221) is sleeved on the outside of the connecting rod (211), its top end is fixedly connected to the bottom surface of the fixed disc (212), and its bottom end is fixedly connected to the top surface of the sliding disc (222); The stiffness of the spring (221) is matched with a pulse jet pressure of 0.5-0.7MPa to ensure that the sliding disk can descend to the limit position during jetting and can slowly rebound and reset after jetting. The spring (221) is a stainless steel compression spring with a wire diameter of 0.8-1.2mm and an initial pre-compression of 5-8mm.

4. A dust removal device for wood processing in the production of bio-based building materials according to claim 3, characterized in that: The unfolding assembly (31) includes filter cloth one (311), a plurality of elastic strips (312), a fixing ring (313), a plurality of push strips (314), and filter cloth two (315); the inner edge of the filter cloth one (311) is fixedly connected to the outer wall of the sliding disk (222), and the outer edge of the filter cloth one (311) is fixedly connected to the inner wall of the fixing ring (313); the plurality of elastic strips (312) are evenly distributed along the circumference, and their top ends are fixedly connected to the bottom surface of the sliding disk (222), and their bottom ends are fixedly connected to the top surface of the fixing ring (313); The elastic strip (312) is initially curved towards the axis of the connecting rod, and gradually straightens and expands outward when subjected to axial tension. The inner end of the pusher (314) is fixed at the curved top of the elastic strip (312), and the outer end is fixed radially outward to the inner wall of the middle section of the filter cloth one (311). When the elastic strip is straightened, the filter cloth one is radially opened by the pusher. The outer edge of the filter cloth two (315) is fixedly connected to the inner wall of the fixing ring (313), and the inner edge is fixedly connected to the outer wall of the connecting rod (211), located above the filter cloth one. The top surface of the fixing ring (313) is provided with several guide plates along the circumference. The guide plates are inclined toward the side wall of the bag to guide the rising airflow to the inner wall of the middle part of the bag, so as to avoid the airflow directly scouring the bag opening area. The outer edge of the filter cloth (311) is sewn with a wear-resistant nylon strip to reduce frictional wear on the inner wall of the bag during unfolding and shrinking.

5. A dust removal device for wood processing in the production of bio-based building materials according to claim 4, characterized in that: The sliding assembly (41) includes several fixing blocks (411) fixed around the top surface of the sliding disk (222). The fixing blocks (411) have several arc-shaped grooves (412) on their sidewalls facing the connecting rod. The upper part of the fixing blocks (411) has a push block (414) that is horizontally facing the connecting rod. The fixed block (411) is also provided with an elastic plate (413). The elastic plate (413) is initially in a pre-compressed state and is used to push the damping motion component to reset. One end of the elastic plate (413) is engaged in the slot of the fixed block (411), and the other end abuts against the side of the push block (423). It is in a pre-compressed state during assembly and applies a reset thrust to the push block under normal conditions.

6. A dust removal device for wood processing in the production of bio-based building materials according to claim 5, characterized in that: The motion component (42) includes a slider (421) fixed to the outer wall of the connecting rod (211). The slider (421) has a horizontal guide groove inside. The positioning block (422) is slidably installed in the guide groove. The pushing block (423) is rotatably connected to the positioning block (422). The rotational mating surfaces of the two are interference fit to provide rotational resistance. The slider (421) also has a bending plate (425) and a limiting plate (424) fixed inside; when the sliding disk rebounds upward, the push block (414) pushes the push block (423) to rotate and move horizontally, squeezing the bending plate (425) into the arc groove (412) to form damping and delay the reset of the sliding disk; the bending plate (425) is made of 65Mn spring steel sheet with a thickness of 0.3mm, and the interference between the positioning block and the push block is 0.05-0.08mm to ensure that the maximum static friction force is greater than the natural rebound force of the bending plate and less than the deformation thrust of the elastic plate.

7. A dust removal device for wood processing in the production of bio-based building materials according to claim 6, characterized in that: The filter cloth one (311) and filter cloth two (315) are radially stretchable pleated structures. When the filter cloth one (311) is fully unfolded, its outer edge fits against the inner wall of the bag. The initial pore size of filter cloth 2 (315) is larger than that of filter cloth 1 (311); both are woven with a twill weave with 20% elastic spandex yarn in the weft direction and polyester industrial yarn in the warp direction, with a weft density of 280 yarns / 10cm, and the pleats are heat-pressed and shaped. When subjected to axial stretching, the warp and weft yarns are squeezed together, and the pore size shrinks synchronously as the stretching amount increases; Filter cloth one (311) is a microporous filter cloth, which only allows less than 30% of the airflow to pass through, and the remaining airflow is guided along the surface of the filter cloth to the side wall of the bag; The surface of filter cloth one is coated with a polytetrafluoroethylene water-repellent and oil-repellent coating, which, together with the pulse jet airflow, achieves self-cleaning of the surface and avoids micropore blockage.

8. A dust removal device for wood processing in the production of bio-based building materials according to claim 7, characterized in that: One end of the elastic plate (413) is engaged in the slot of the fixed block (411), and the other end abuts against the side of the push block (423). During assembly, it is in a pre-compressed state and applies a reset thrust to the push block under normal conditions.

Images