Two-stage spiral-flow type dust collecting and purifying device for processing density board

Abstract

The invention discloses a two-stage spiral-flow type dust trapping and purifying device for density board processing, and belongs to the technical field of dust trapping and purifying, the two-stage spiral-flow type dust trapping and purifying device comprises a base, a first centrifugal mechanism is arranged on the base, the first centrifugal mechanism comprises a first-stage centrifugal cylinder rotationally mounted at the top end of the base, and a first motor is fixedly mounted at the bottom end of the base; a fixing rod is fixedly installed on an output shaft of the first motor and fixedly connected with the first-stage centrifugal barrel, and the end, close to the first-stage centrifugal barrel, of the base communicates with an air inlet pipe. The necking dust blocking structure of the rotational flow guide cone is matched with the surface flow guide grooves and the air holes, dust can be forced to slide down along a set track, and reentrainment of dust is avoided; the flow stabilizing blades can flexibly adjust flow channels according to airflow working conditions, and vortex and backflow are reduced. Meanwhile, the two-stage centrifugal structure is matched with the first motor and the second motor to rotate reversely, the flow field matching performance of the first-stage centrifugal cylinder and the second-stage centrifugal cylinder is optimized, and the grading separation effect of coarse dust and fine dust is remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of dust capture and purification technology, and in particular to a two-stage cyclone dust capture and purification device for MDF processing. Background Technology

[0002] In the MDF (medium-density fiberboard) processing industry, a large amount of dust is generated during the production process. This dust not only seriously pollutes the working environment and affects the health of operators—for example, long-term inhalation of dust may lead to occupational diseases such as respiratory illnesses—but also, if the dust spreads into the surrounding environment, it will have an adverse impact on the ecological environment and fail to meet environmental protection requirements.

[0003] Traditional dust collection and purification devices have several limitations when dealing with dust generated from MDF (medium-density fiberboard) processing. Firstly, single-stage treatment often fails to achieve ideal purification results. Due to the complex composition and wide particle size distribution of MDF processing dust, single-stage devices have limited capacity to collect dust of different sizes and properties. Some fine dust particles easily escape, resulting in purified gas still containing significant impurities and failing to meet stringent environmental emission standards. Secondly, existing devices are ineffective at suppressing and guiding dust during collection. Under airflow, dust easily forms a turbulent airflow field inside the device, making effective settling and separation difficult and reducing collection efficiency. Furthermore, the significant airflow impact during exhaust not only increases energy consumption but may also damage the internal structure, affecting the device's lifespan and stability. Summary of the Invention

[0004] The purpose of this invention is to provide a two-stage cyclone dust collection and purification device for MDF processing, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a two-stage cyclone dust collection and purification device for MDF processing, comprising a base, a first centrifugal mechanism disposed on the base, the first centrifugal mechanism comprising a first-stage centrifugal cylinder rotatably mounted on the top of the base, a first motor fixedly mounted on the bottom of the base, a fixed rod fixedly mounted on the output shaft of the first motor, the fixed rod being fixedly connected to the first-stage centrifugal cylinder, and an air inlet pipe being connected to one end of the base near the first-stage centrifugal cylinder; a second centrifugal mechanism disposed on the top of the first-stage centrifugal cylinder, the second centrifugal mechanism comprising a second-stage centrifugal cylinder connected to the top of the first-stage centrifugal cylinder; a dust suppression component disposed on the surface of the fixed rod between the first-stage and second-stage centrifugal cylinders, the dust suppression component comprising a cyclone guide cone fixedly mounted on the surface of the fixed rod and having a constriction-type dust-blocking function, a guide groove being formed on the surface of the cyclone guide cone, and air holes being formed on the surface of the cyclone guide cone, and the cyclone guide cone forcing dust to slide down along the guide groove through the air holes.

[0006] As a preferred embodiment of the present invention, the top of the secondary centrifuge is provided with an exhaust mechanism, the exhaust mechanism including an exhaust pipe connected to the top of the secondary centrifuge, the airflow output end of the exhaust pipe is provided with a connecting pipe, and the connecting pipe is connected to the inside of the fixed rod through a rotating shaft, the fixed rod is connected to the internal cavity of the swirling guide cone, and is used to cooperate with the air holes to suppress the dust in the guide groove.

[0007] As a preferred embodiment of the present invention, a rotating rod is fixedly installed at one end of the fixed rod inside the exhaust pipe, a baffle plate for reducing airflow impact is fixedly installed inside the exhaust pipe, and a plurality of vibrating blocks are fixedly installed at the bottom end of the baffle plate. A striking component for colliding with the vibrating blocks is provided on the surface of the fixed rod near the vibrating blocks.

[0008] As a preferred embodiment of the present invention, a filter box is provided on the exhaust pipe, and the interior of the filter box is provided with activated carbon flakes for filtering the gas.

[0009] As a preferred embodiment of the present invention, the swirl guide cone is provided with multiple reinforcing ribs inside, and elastic support wires are provided between the reinforcing ribs. The fixed rod is provided with a pressure boosting valve inside the top of the swirl guide cone for adjusting the air pressure introduced into the cavity of the swirl guide cone.

[0010] As a preferred embodiment of the present invention, a first spiral auger is fixedly installed on the surface of the fixed rod inside the first-stage centrifuge tube, and a second motor is fixedly installed at one end of the fixed rod inside the second-stage centrifuge tube. The second motor is electrically connected to an external power source through a conductive slip ring assembly located at the end of the fixed rod. A second spiral auger is fixedly installed on the output shaft of the second motor, and the first motor and the second motor rotate in opposite directions.

[0011] As a preferred embodiment of the present invention, a gas guiding assembly is provided on the surface of the fixed rod located between the primary centrifuge tube and the secondary centrifuge tube. The gas guiding assembly includes multiple flow-stabilizing blades fixedly installed on the outer surface of the fixed rod. A first channel is opened at the top of the inner cavity of the flow-stabilizing blade. Two rotating plates are rotatably installed at the bottom of the flow-stabilizing blade, and the free ends of the two rotating plates are connected and sealed by a folding plate. Multiple second channels are opened at the bottom of the rotating plates, and a second spring is provided between the two rotating plates.

[0012] As a preferred embodiment of the present invention, the output ends of the first motor and the second motor are respectively fixedly installed with a main feed assembly and a secondary feed assembly. The main feed assembly and the secondary feed assembly each include a fixing plate installed on the output shaft surface of the first motor and the second motor, and rollers for cleaning the inner walls of the first centrifuge and the second centrifuge are slidably installed on the surface of the fixing plate near the first centrifuge and the second centrifuge, respectively. A first spring is provided between the rollers and the fixing plate.

[0013] As a preferred embodiment of the present invention, the bottom ends of the primary centrifuge and the secondary centrifuge are respectively provided with a plurality of first discharge holes and second discharge holes, the outer surface of the roller is provided with a spiral groove for smooth discharge, and a convex plate for reducing blockage is fixedly installed inside the spiral groove.

[0014] As a preferred embodiment of the present invention, a first outer shell is fixedly installed on the top of the base, and a second outer shell is fixedly installed on the top of the first outer shell. The first centrifuge tube and the second centrifuge tube are located inside the first outer shell and the second outer shell, respectively. The bottom of the first outer shell and the second outer shell are provided with a structure for centrally discharging dust and impurities discharged from the first discharge hole and the second discharge hole.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. This invention utilizes the synergistic effect of dust suppression and air guiding components. The constricted dust-blocking structure of the swirling guide cone, combined with surface guide grooves and air holes, forces dust to slide down along a set trajectory, preventing secondary dust re-entrainment. The adaptive rotating plate, folding plate, and spring structure of the flow stabilizing blades can flexibly adjust the flow channel according to airflow conditions, reducing eddies and backflow. At the same time, the dual-stage centrifugal structure with fixed rod linkage, combined with the counter-rotation of the first and second motors, optimizes the flow field matching between the first and second centrifugal cylinders, significantly improving the graded separation effect of coarse and fine dust, and adapting to the characteristics of wide particle size and easy adhesion of MDF dust.

[0017] 2. In this invention, the rollers of the main feed assembly and the auxiliary feed assembly, in conjunction with the first spring, adaptively and tightly adhere to the inner wall of the centrifuge cylinder. The spiral grooves and convex plates on the surface of the rollers can efficiently clean the dust adhering to the cylinder wall and guide the dust to move towards the discharge hole, avoiding dust accumulation and bridging. The air holes of the swirling guide cone, in conjunction with the pressure boosting valve and pressure relief valve inside the fixed rod, can suppress and blow away the dust in the guide groove, further reducing dust adhesion.

[0018] 3. The present invention can effectively reduce airflow impact and reduce equipment vibration and noise through the baffle plate of the exhaust mechanism. The impact component driven by the fixed rod collides with the vibrating block on the baffle plate, which can prevent the baffle plate from accumulating dust and clogging. The filter box on the exhaust pipe and the internal activated carbon can perform secondary filtration on the separated gas, adsorb harmful impurities and trace dust, and ensure that the exhaust gas meets the standards.

[0019] 4. The present invention improves the structural strength and vibration resistance of the guide cone by using reinforcing ribs and elastic support wires inside the swirling guide cone, avoiding structural deformation and eccentricity under high-speed airflow, and ensuring the stability of the swirling field; the linkage design of the fixed rod and rotating rod, together with the outer shell to protect the centrifuge tube, can effectively resist dust erosion and equipment vibration, and extend the overall service life of the device.

[0020] 5. The present invention uses the first discharge hole and the second discharge hole at the bottom of the primary centrifuge tube and the secondary centrifuge tube, in conjunction with the guiding action of the spiral groove of the roller, to accurately guide the separated dust to the discharge structure; the first shell and the second shell protect the primary centrifuge tube and the secondary centrifuge tube respectively, while realizing the centralized collection of dust, avoiding dust scattering and polluting the equipment and production environment, and facilitating the subsequent unified recycling or treatment of dust. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the internal structure of the first outer shell of the present invention;

[0023] Figure 3 This is a schematic diagram of the internal structure of the first-stage centrifuge tube of the present invention;

[0024] Figure 4 This is a schematic diagram of the internal structure of the fixing plate of the present invention;

[0025] Figure 5 This is a schematic diagram of the roller structure of the present invention;

[0026] Figure 6 This is a schematic diagram of the internal structure of the exhaust pipe of the present invention;

[0027] Figure 7 This is a schematic diagram of the flow-stabilizing blade structure of the present invention;

[0028] Figure 8 This is a schematic diagram of the cross-sectional structure of the flow-stabilizing blade of the present invention;

[0029] Figure 9 This is a schematic diagram of the swirl guide cone structure of the present invention;

[0030] Figure 10 This is a schematic diagram of the cross-sectional structure of the swirling guide cone of the present invention.

[0031] In the diagram: 1. Base; 2. First centrifugal mechanism; 21. First motor; 22. Fixing rod; 23. First discharge hole; 24. First centrifugal cylinder; 25. First auger; 26. Main feed assembly; 261. Fixing plate; 262. First spring; 263. Roller; 264. Spiral groove; 265. Protruding plate; 27. Air guide assembly; 271. Flow stabilizer blade; 272. Second spring; 273. Folding plate; 274. Rotating plate; 28. Dust suppression assembly; 281. Swirl guide cone; 282. 283. Air vent; 284. Guide channel; 285. Pressure booster valve; 286. Reinforcing rib; 287. Elastic support wire; 288. Pressure relief valve; 289. Connecting pipe; 2000. First outer shell; 21. Second centrifugal mechanism; 22. Secondary centrifugal cylinder; 33. Secondary feed guide assembly; 34. Second spiral auger; 35. Second outer shell; 36. Second motor; 47. Exhaust mechanism; 480. Rotating rod; 49. Impacting component; 40. Baffle plate; 41. Exhaust pipe; 42. Filter box; 5. Air inlet pipe. Detailed Implementation

[0032] 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.

[0033] Please see Figure 1-10 This invention provides a two-stage cyclone dust collection and purification device for MDF processing, comprising a base 1, on which a first centrifugal mechanism 2 is mounted. The first centrifugal mechanism 2 includes a primary centrifugal cylinder 24 rotatably mounted on the top of the base 1, a first motor 21 fixedly mounted on the bottom of the base 1, and a fixing rod 22 fixedly mounted on the output shaft of the first motor 21, the fixing rod 22 being fixedly connected to the primary centrifugal cylinder 24. Furthermore, an air inlet pipe 5 is connected to one end of the base 1 near the primary centrifugal cylinder 24. A second centrifugal mechanism 3 is mounted on the top of the primary centrifugal cylinder 24, the second centrifugal mechanism 3 including a secondary centrifugal cylinder 31 connected to and mounted on the top of the primary centrifugal cylinder 24. A dust suppression assembly 28 is provided on the surface of the fixed rod 22 located between the primary centrifuge tube 24 and the secondary centrifuge tube 31. The dust suppression assembly 28 includes a swirling guide cone 281 with a constricted dust-blocking function, which is fixedly installed on the surface of the fixed rod 22. A guide groove 283 is opened on the surface of the swirling guide cone 281, and an air hole 282 is also opened on the surface of the swirling guide cone 281. The swirling guide cone 281 forces the dust to slide down along the guide groove 283 through the air hole 282.

[0034] The first motor 21 drives the fixed rod 22 to rotate, which in turn drives the primary centrifuge drum 24 to rotate synchronously. The dust-laden airflow enters the primary centrifuge drum 24 through the air inlet pipe 5, where coarse dust is initially separated under centrifugal force. Then, it connects to the secondary centrifuge drum 31 through the top of the primary centrifuge drum 24, thus achieving two-stage separation. The swirling guide cone 281 on the fixed rod 22 utilizes a constricted dust-blocking structure to effectively prevent dust from accumulating at the transition between the primary centrifuge drum 24 and the secondary centrifuge drum 31. Combined with the surface guide groove 283, it guides the dust downwards. At the same time, airflow is ejected through the air hole 282, forcing the dust to move along the guide groove 283, preventing dust dispersion or secondary dust generation, and laying the foundation for subsequent separation and discharge.

[0035] In some embodiments, an exhaust mechanism 4 is provided at the top of the secondary centrifuge 31. The exhaust mechanism 4 includes an exhaust pipe 44 connected to the top of the secondary centrifuge 31. The airflow output end of the exhaust pipe 44 is provided with a connecting pipe 288, and the connecting pipe 288 is connected to the inside of the fixed rod 22 through a rotating shaft. The fixed rod 22 is connected to the internal cavity of the swirling guide cone 281, which is used to cooperate with the air hole 282 to suppress the dust in the guide groove 283.

[0036] The exhaust pipe 44 at the top of the secondary centrifuge 31 is used to discharge the purified gas after the two-stage separation. The connecting pipe 288 connects the exhaust pipe 44 to the inside of the fixed rod 22. The gas pressure discharged from the exhaust pipe 44 is introduced into the internal cavity of the vortex guide cone 281 through the fixed rod 22, and then sprayed out through the air hole 282. This creates downward pressure on the dust in the guide groove 283, forcing the dust to slide down the guide groove 283, preventing the dust from being retained in the guide groove 283 or being swept up by the airflow, further suppressing secondary dust, and improving the guiding effect of the vortex guide cone 281 to ensure the continuity and stability of the two-stage separation.

[0037] In some embodiments, a rotating rod 41 is fixedly installed at one end of the fixed rod 22 inside the exhaust pipe 44, a baffle plate 43 for reducing airflow impact is fixedly installed inside the exhaust pipe 44, and a plurality of vibrating blocks are fixedly installed at the bottom end of the baffle plate 43. A striking component 42 for colliding with the vibrating block is provided on the surface of the fixed rod 22 near the vibrating block.

[0038] The fixed rod 22 drives the rotating rod 41 to rotate synchronously. The striking component 42 on the rotating rod 41 rotates with the fixed rod 22, continuously colliding with the vibrating block at the bottom of the baffle 43, causing the baffle 43 to vibrate slightly. Furthermore, the baffle 43 itself can block the airflow within the exhaust pipe 44, reducing the impact intensity of the airflow and minimizing airflow turbulence. Simultaneously, the vibration of the vibrating block can dislodge fine dust adhering to the surface of the baffle 43, preventing blockage and ensuring efficient exhaust.

[0039] In some embodiments, an exhaust pipe 44 is provided with a filter box 45, and the interior of the filter box 45 is provided with activated carbon flakes for filtering the gas.

[0040] The filter box 45 on the exhaust pipe 44 contains activated carbon. After the gas is separated by two-stage centrifugation, it passes through the filter box 45 during the discharge process. The activated carbon uses its own adsorption properties to adsorb the residual trace amounts of fine dust, wood fibers and harmful impurities volatilized from adhesives in the gas, thus achieving secondary purification of the gas.

[0041] In some embodiments, the interior of the swirl guide cone 281 is provided with multiple reinforcing ribs 285, and elastic support wires 286 are provided between the reinforcing ribs 285. The fixed rod 22 is provided with a pressure boosting valve 284 for adjusting the air pressure introduced into the cavity of the swirl guide cone 281 inside the top of the swirl guide cone 281, and the fixed rod 22 is provided with a pressure boosting valve 287 for adjusting the air pressure introduced into the cavity of the swirl guide cone 281 inside the top of the swirl guide cone 281.

[0042] The reinforcing ribs 285 inside the swirl guide cone 281 enhance its structural strength, while the elastic support wires 286 strengthen the guide cone's vibration resistance, preventing deformation and eccentricity during high-speed airflow and equipment operation. The pressure boosting valve 284 inside the fixing rod 22 adjusts the air pressure introduced into the cavity of the swirl guide cone 281, ensuring sufficient airflow intensity from the air holes 282 to force dust down. The pressure relief valve 287 releases excessively high air pressure within the guide cone cavity, preventing damage to the guide cone from excessive pressure and achieving air pressure balance. The pressure boosting valve 284 and pressure relief valve 287 work together to achieve adaptive air pressure regulation, ensuring stable purging performance of the air holes 282. Simultaneously, when the air pressure inside the cavity of the swirl guide cone 281 is lower than the flow field pressure inside the first-stage centrifuge, the pressure boosting valve 284 opens to introduce air pressure into the exhaust pipe 44, ensuring that the air holes 282 purge outwards.

[0043] In some embodiments, a first spiral auger 25 is fixedly installed on the surface of the fixed rod 22 inside the first-stage centrifuge 24, and a second motor 36 is fixedly installed at one end of the fixed rod 22 inside the second-stage centrifuge 31. The second motor 36 is electrically connected to an external power source through a conductive slip ring assembly provided at the end of the fixed rod 22. A second spiral auger 33 is fixedly installed on the output shaft of the second motor 36, and the first motor 21 and the second motor 36 rotate in opposite directions.

[0044] In this system, the fixed rod 22 drives the first auger 25 inside the first-stage centrifuge cylinder 24 to rotate, conveying the coarse dust separated in the first-stage centrifuge cylinder 24 downwards to the discharge structure. The second motor 36 drives the second auger 33 to rotate, conveying the fine dust separated in the second-stage centrifuge cylinder 31 downwards. To prevent the power cable of the second motor 36 from becoming entangled due to the high-speed rotation of the fixed rod 22, an external power supply continuously and stably supplies power to the second motor 36, which rotates with the rod, through a conductive slip ring assembly. This ensures that the first motor 21 and the second motor 36 achieve continuous counter-rotation, thereby optimizing the swirling flow field in the first-stage centrifuge cylinder 24 and the second-stage centrifuge cylinder 31, avoiding mutual interference between the two swirling flows, and improving the classification and separation effect. Furthermore, the rotational speed of the second motor 36 is greater than that of the first motor 21, so that the dust not separated in the first-stage centrifuge cylinder 24 will be separated by the second-stage centrifuge cylinder 31, strengthening the advantages of two-stage classification and separation and improving the separation efficiency of coarse and fine dust.

[0045] In some embodiments, a gas guiding assembly 27 is provided on the surface of the fixed rod 22 located between the primary centrifuge tube 24 and the secondary centrifuge tube 31. The gas guiding assembly 27 includes a plurality of flow stabilizing blades 271 fixedly installed on the outer surface of the fixed rod 22. A first channel is opened at the top of the inner cavity of the flow stabilizing blade 271. Two rotating plates 274 are rotatably installed at the bottom of the flow stabilizing blade 271, and the free ends of the two rotating plates 274 are connected and sealed by a folding plate 273. A plurality of second channels are opened at the bottom of the rotating plates 274, and a second spring 272 is provided between the two rotating plates 274.

[0046] Multiple flow-stabilizing blades 271 on the fixed rod 22 are evenly distributed along the circumference, guiding and stabilizing the airflow between the primary centrifuge tube 24 and the secondary centrifuge tube 31. The first channel inside the flow-stabilizing blade 271 cooperates with the second channel on the rotating plate 274 to ensure smooth airflow. When the airflow volume and speed fluctuate, the airflow impacts the rotating plate 274, compressing or stretching the second spring 272, causing the rotating plate 274 to rotate. The folding plate 273 extends and retracts accordingly, adaptively adjusting the size and angle of the flow channel to ensure stable airflow.

[0047] In some embodiments, the output ends of the first motor 21 and the second motor 36 are respectively fixedly mounted with a main feed assembly 26 and a secondary feed assembly 32. The main feed assembly 26 and the secondary feed assembly 32 respectively include a fixing plate 261 mounted on the output shaft surface of the first motor 21 and the second motor 36. Rollers 263 for cleaning the inner walls of the first centrifuge cylinder 24 and the second centrifuge cylinder 31 are slidably mounted on the surface of the fixing plate 261 near the surface of the first centrifuge cylinder 24 and the second centrifuge cylinder 31, respectively. A first spring 262 is provided between the roller 263 and the fixing plate 261.

[0048] In this system, the first motor 21 and the second motor 36 drive the main material guide assembly 26 and the auxiliary material guide assembly 32 to rotate, respectively. The rollers 263 on the fixed plate 261 adaptively adhere to the inner walls of the primary centrifuge cylinder 24 and the secondary centrifuge cylinder 31 through the elastic force of the first spring 262. As the rollers 263 rotate with the first motor 21 and the second motor 36, they roll and clean the dust adhering to the inner walls of the primary centrifuge cylinder 24 and the secondary centrifuge cylinder 31. At the same time, the first spring 262 can compensate for the wear of the rollers 263, ensuring that the rollers 263 always adhere to the cylinder walls, avoiding missed scraping, and realizing automatic dust removal from the inner walls of the primary centrifuge cylinder 24 and the secondary centrifuge cylinder 31. This solves the problem of MDF dust easily adhering to the cylinder walls and avoids narrowing of the flow channel and distortion of the swirling field.

[0049] In some embodiments, the bottom ends of the primary centrifuge tube 24 and the secondary centrifuge tube 31 are respectively provided with a plurality of first discharge holes 23 and second discharge holes 34, the outer surface of the roller 263 is provided with a spiral groove 264 for smooth discharge, and a protrusion 265 for reducing blockage is fixedly installed inside the spiral groove 264.

[0050] The first discharge hole 23 and the second discharge hole 34 at the bottom of the primary centrifuge cylinder 24 and the secondary centrifuge cylinder 31 are used to discharge the separated dust to the collection structure. The spiral groove 264 on the surface of the roller 263, while cleaning the dust, guides the scraped dust along the spiral trajectory to the first discharge hole 23 and the second discharge hole 34. The protruding plate 265 inside the spiral groove 264 can break up clumps of dust, preventing dust accumulation inside the spiral groove 264, ensuring smooth discharge and not affecting the continuous operation of the centrifugal separation.

[0051] In some embodiments, a first outer shell 29 is fixedly installed on the top of the base 1, and a second outer shell 35 is fixedly installed on the top of the first outer shell 29. The primary centrifuge tube 24 and the secondary centrifuge tube 31 are located inside the first outer shell 29 and the second outer shell 35, respectively. The bottom ends of the first outer shell 29 and the second outer shell 35 are provided with structures for centrally discharging dust and impurities discharged from the first discharge hole 23 and the second discharge hole 34.

[0052] The first outer shell 29 and the second outer shell 35 protect the primary centrifuge cylinder 24 and the secondary centrifuge cylinder 31, respectively, preventing dust from scattering outside the equipment and preventing external debris from entering the centrifuge cylinders and affecting the separation effect. The collection structure at the bottom of the first outer shell 29 and the second outer shell 35 can collect the dust discharged from the first discharge hole 23 and the second discharge hole 34, which is convenient for subsequent unified treatment or recycling.

[0053] Working principle: The base 1 provides installation support for the device. The first motor 21 drives the fixed rod 22 to rotate, which in turn drives the first-stage centrifuge cylinder 24 to rotate synchronously. The dust-laden airflow enters the first-stage centrifuge cylinder 24 through the air inlet pipe 5, where coarse dust is initially separated under centrifugal force. Then, it connects to the second-stage centrifuge cylinder 31 through the top of the first-stage centrifuge cylinder 24, thus achieving two-stage separation. The swirling guide cone 281 on the fixed rod 22 utilizes a constricted dust-blocking structure to effectively prevent dust from accumulating at the transition between the first-stage centrifuge cylinder 24 and the second-stage centrifuge cylinder 31. Combined with the surface guide groove 283, it guides the dust downwards. At the same time, airflow is ejected through the air hole 282, forcing the dust to move along the guide groove 283, preventing dust dispersion or secondary dust generation, and laying the foundation for subsequent separation and discharge.

[0054] The above are merely specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on the present invention to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of the present invention.

Claims

1. A two-stage cyclone dust collection and purification device for MDF processing, comprising a base (1), characterized in that: A first centrifugal mechanism (2) is provided on the base (1). The first centrifugal mechanism (2) includes a first-stage centrifugal cylinder (24) rotatably mounted on the top of the base (1). A first motor (21) is fixedly mounted on the bottom end of the base (1). A fixing rod (22) is fixedly mounted on the output shaft of the first motor (21). The fixing rod (22) is fixedly connected to the first-stage centrifugal cylinder (24). An air inlet pipe (5) is connected to one end of the base (1) near the first-stage centrifugal cylinder (24). A second centrifugal mechanism (3) is provided on the top end of the first-stage centrifugal cylinder (24). The second centrifugal mechanism (3) includes a connecting pipe. A secondary centrifuge tube (31) is installed at the top of the primary centrifuge tube (24). A dust suppression component (28) is provided on the surface of the fixing rod (22) between the primary centrifuge tube (24) and the secondary centrifuge tube (31). The dust suppression component (28) includes a swirling guide cone (281) with a constriction and dust blocking function, which is fixedly installed on the surface of the fixing rod (22). A guide groove (283) is opened on the surface of the swirling guide cone (281), and an air hole (282) is opened on the surface of the swirling guide cone (281). The swirling guide cone (281) forces the dust to slide down along the guide groove (283) through the air hole (282).

2. The dual-stage cyclone dust collection and purification device for MDF processing according to claim 1, characterized in that: The top of the secondary centrifuge tube (31) is provided with an exhaust mechanism (4). The exhaust mechanism (4) includes an exhaust pipe (44) connected to the top of the secondary centrifuge tube (31). The airflow output end of the exhaust pipe (44) is provided with a connecting pipe (288), and the connecting pipe (288) is connected to the inside of the fixed rod (22) through a rotating shaft. The fixed rod (22) is connected to the internal cavity of the swirling guide cone (281) and is used to cooperate with the air hole (282) to suppress the dust in the guide groove (283).

3. The dual-stage cyclone dust collection and purification device for MDF processing according to claim 2, characterized in that: The fixed rod (22) is fixedly installed with a rotating rod (41) at one end inside the exhaust pipe (44). The exhaust pipe (44) is fixedly installed with a baffle plate (43) for reducing airflow impact. Multiple vibration blocks are fixedly installed at the bottom end of the baffle plate (43). The fixed rod (22) is provided with a striking component (42) for colliding with the vibration block on its surface.

4. The dual-stage cyclone dust collection and purification device for MDF processing according to claim 2, characterized in that: The exhaust pipe (44) is provided with a filter box (45), and the interior of the filter box (45) is provided with activated carbon for filtering the gas.

5. The dual-stage cyclone dust collection and purification device for MDF processing according to claim 1, characterized in that: The swirling guide cone (281) is provided with multiple reinforcing ribs (285) inside, and elastic support wires (286) are provided between the reinforcing ribs (285). The fixed rod (22) is provided with a pressure boosting valve (284) for adjusting the air pressure of the cavity inside the swirling guide cone (281) inside the top of the swirling guide cone (281). The fixed rod (22) is provided with a pressure boosting valve (287) for adjusting the air pressure of the cavity inside the swirling guide cone (281) inside the top of the swirling guide cone (281).

6. The dual-stage cyclone dust collection and purification device for MDF processing according to claim 1, characterized in that: The first spiral auger (25) is fixedly installed on the surface of the fixed rod (22) inside the first centrifuge tube (24). The second motor (36) is fixedly installed at one end of the fixed rod (22) inside the second centrifuge tube (31). The second motor (36) is electrically connected to an external power source through a conductive slip ring assembly set at the end of the fixed rod (22). The output shaft of the second motor (36) is fixedly installed with a second spiral auger (33). The first motor (21) and the second motor (36) rotate in opposite directions.

7. The dual-stage cyclone dust collection and purification device for MDF processing according to claim 1, characterized in that: The fixed rod (22) is provided with an air guiding assembly (27) on the surface between the first-stage centrifuge tube (24) and the second-stage centrifuge tube (31). The air guiding assembly (27) includes multiple flow-stabilizing blades (271) fixedly installed on the outer surface of the fixed rod (22). The top of the inner cavity of the flow-stabilizing blade (271) is provided with a first channel. The bottom of the flow-stabilizing blade (271) is rotatably installed with two rotating plates (274), and the free ends of the two rotating plates (274) are connected and sealed by a folding plate (273). The bottom of the rotating plate (274) is provided with multiple second channels, and a second spring (272) is provided between the two rotating plates (274).

8. The two-stage cyclone dust collection and purification device for MDF processing according to claim 1, characterized in that: The output ends of the first motor (21) and the second motor (36) are respectively fixedly installed with a main feed assembly (26) and a secondary feed assembly (32). The main feed assembly (26) and the secondary feed assembly (32) respectively include a fixing plate (261) installed on the output shaft surface of the first motor (21) and the second motor (36). Rollers (263) for cleaning the inner walls of the first centrifuge tube (24) and the second centrifuge tube (31) are slidably installed on the surface of the fixing plate (261) near the surface of the first centrifuge tube (24) and the second centrifuge tube (31). A first spring (262) is provided between the roller (263) and the fixing plate (261).

9. A two-stage cyclone dust collection and purification device for MDF processing according to claim 8, characterized in that: The bottom ends of the first centrifuge tube (24) and the second centrifuge tube (31) are respectively provided with a plurality of first discharge holes (23) and second discharge holes (34). The outer surface of the roller (263) is provided with a spiral groove (264) for smooth discharge, and a convex plate (265) for reducing blockage is fixedly installed inside the spiral groove (264).

10. A two-stage cyclone dust collection and purification device for MDF processing according to claim 8, characterized in that: The base (1) is fixedly mounted with a first outer shell (29), and the first outer shell (29) is fixedly mounted with a second outer shell (35). The first centrifuge tube (24) and the second centrifuge tube (31) are located inside the first outer shell (29) and the second outer shell (35), respectively. The bottom ends of the first outer shell (29) and the second outer shell (35) are provided with structures for centrally discharging dust and impurities discharged from the first discharge hole (23) and the second discharge hole (34).

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