A bag filter for fiberboard production

Abstract

The present invention relates to the field of bag dust collectors, specifically a bag dust collector for fiberboard production, comprising a dust collector body, a top cover installed on the top of the dust collector body, a dust collecting box installed at the bottom of the dust collector body, a bag mounting plate installed inside the dust collector body, a dust bag installed at the bottom of the bag mounting plate, a suction hole located inside the dust bag is penetrated by the bag mounting plate, an air inlet pipe is installed on the side of the bottom end of the dust collector body, an air outlet pipe is installed on the side of the top cover, a back-blowing dust removal mechanism that can move up and down is installed on the inside and outside of the dust bag, a back-blowing lifting mechanism located inside the dust bag is installed at the bottom of the bag mounting plate, a bag bottom plate is installed at the bottom of the dust bag, a bottom plate connecting rod is connected between the bag bottom plate and the inner wall of the dust collector body, and a beating vibration mechanism located inside the dust bag is installed on the top of the bag bottom plate. The present invention can repair the primary layer while back-blowing dust removal to prevent the primary layer from being damaged and affecting the filtering effect.

Description

Technical Field

[0001] The present invention relates to the technical field of bag filters, and particularly to a bag filter for fiberboard production. Background Art

[0002] During the production process of fiberboard, a large amount of dust particles will be generated. To avoid the harm of dust to the production environment and personnel safety, it is necessary to collect and filter the dust. A bag filter is a dry dust filtering device. It is suitable for capturing fine, dry, and non-fibrous dust. The filter bag is made of woven filter cloth or non-woven felt. The dust-containing gas is filtered by the filtering action of the fiber fabric. When the dust-containing gas enters the bag filter, dust particles with large particle size and high specific gravity settle down due to the action of gravity and fall into the ash hopper. When the gas containing finer dust passes through the filter material, the dust is retained, and the gas is purified.

[0003] After the filter material of the bag filter is used for a period of time, due to effects such as sieving, collision, retention, diffusion, and static electricity, a layer of dust accumulates on the surface of the filter bag. This layer of dust is called the initial layer. In the subsequent movement process, the initial layer becomes the main filtering layer of the filter material. Relying on the action of the initial layer, a filter material with larger mesh holes can also obtain a higher filtering efficiency. As the dust accumulates on the surface of the filter material, the efficiency and resistance of the dust collector both increase accordingly. When the pressure difference on both sides of the filter material is very large, some fine dust particles that have adhered to the filter material will be squeezed through, resulting in a decrease in the efficiency of the dust collector. In addition, too high a resistance of the dust collector will cause a significant decrease in the air volume of the dust removal system. Therefore, after the resistance of the dust collector reaches a certain value, it is necessary to clean the ash in time. However, it should be noted that the initial layer cannot be damaged during ash cleaning to avoid a decrease in efficiency.

[0004] At present, the ash accumulated on the filter bag of the bag filter is usually removed by gas backwashing. Under the action of the reverse air flow, the shape of the filter bag is forced to shrink or expand to achieve ash cleaning. The dust removed by backwashing falls into the ash hopper and is discharged to the ash conveying device through a double-layer ash discharge valve; it can also be removed by the method of injecting pulsed air flow. The compressed air instantaneously released by the pulse injection mechanism is used to induce several times of secondary air to shoot into the filter bag at high speed, causing the filter bag to expand rapidly, and achieving ash cleaning by relying on impact vibration and reverse air flow. However, when backwashing and cleaning the ash, the filter bag expands and deforms multiple times, which will cause the voids between the fibers of the filter bag to change, thereby affecting its filtering effect and service life.

[0005] In addition, although the above ash cleaning methods can effectively clean the filter bag, when cleaning the dust by the way of air backwashing, the initial layer on the surface of the filter bag will be damaged. However, the initial layer is the main filtering layer, and after being damaged, its filtering effect will be affected. It takes a period of time to form a complete initial layer again, and during this period, the filtering effect of the filter bag will decline.

[0006] Therefore, based on the defects existing in the prior art, the present invention provides a bag filter for fiberboard production to solve the above problems. Summary of the Invention

[0007] In view of the above situation, to overcome the defects of the prior art, the present invention provides a bag filter for fiberboard production to solve the problems existing in the ash cleaning method of the existing bag filter.

[0008] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0009] A bag filter for fiberboard production, comprising a dust collector body with an open top, a top cover is installed on the top of the dust collector body, the bottom of the dust collector body is funnel-shaped and fixedly installed with an ash collection box, a bag installation plate is detachably installed inside the opening at the top of the dust collector body, a plurality of dust removal bags arranged in a rectangular array are fixedly installed at the bottom of the bag installation plate, air suction holes located inside each dust removal bag penetrate through the upper and lower surfaces of the bag installation plate, an air inlet pipe communicating with the inside thereof is fixedly installed on the side surface at the bottom end of the dust collector body, an air outlet pipe communicating with the inside thereof is installed on the side surface of the top cover, an anti-blowing dust removal mechanism that can move up and down is installed on both the inner and outer sides of each dust removal bag, an anti-blowing lifting mechanism located inside each dust removal bag is installed at the bottom of the bag installation plate, a bag bottom plate is fixedly installed at the bottom of each dust removal bag, a bottom plate connecting rod is fixedly connected between each bag bottom plate and the inner wall of the dust collector body, and a beating and vibrating mechanism located inside the dust removal bag is installed on the top of each bag bottom plate.

[0010] Preferably, an ash outlet pipe communicating with the inside thereof is installed on the front side surface of the ash collection box, an ash outlet auger is rotatably installed inside the ash collection box, an ash collection air suction cylinder is fixedly installed on the side surface of the ash collection box, and an ash collection box filter screen is penetrated and installed between the inside of the ash collection air suction cylinder and the inside of the ash collection box.

[0011] Preferably, the anti-blowing dust removal mechanism includes an anti-blowing air supply ring, an air supply cavity, an anti-blowing ash receiving ring, an ash receiving cavity, an anti-blowing air supply pipe, an anti-blowing air supply pipe shaft, an anti-blowing discharge pipe, and a discharge one-way valve;

[0012] An anti-blowing air supply ring that can move up and down is arranged inside the dust removal bag, and the outer side surface of the anti-blowing air supply ring is attached to the inner side surface of the dust removal bag. An air supply cavity is circumferentially opened on the outer side surface of the anti-blowing air supply ring. An anti-blowing ash receiving ring that can move up and down synchronously with the anti-blowing air supply ring is arranged outside the dust removal bag, and the inner side surface of the anti-blowing ash receiving ring is attached to the outer side surface of the dust removal bag. An ash receiving cavity is circumferentially opened on the inner side surface of the anti-blowing ash receiving ring. An anti-blowing air supply pipe communicating with the inside of the air supply cavity is installed on the top of the anti-blowing air supply ring.

[0013] Preferably, a reverse blowing air supply pipe shaft is rotatably installed at the top of the cloth bag mounting plate. The reverse blowing air supply pipe shaft is connected with a torsion spring. The other end of the reverse blowing air supply pipe penetrates upward through the cloth bag mounting plate and is wound around the outer side of the reverse blowing air supply pipe shaft. An air outlet pipe communicating with the inside is installed on the outer side surface of the reverse blowing ash receiving ring. A one-way outlet valve is installed in the reverse blowing air outlet pipe. The bottom end of the reverse blowing air outlet pipe is bent towards the outer side surface of the dust removal cloth bag.

[0014] A cloth bag scraper abutting against the outer side surface of the dust removal cloth bag is fixedly installed at the bottom of the reverse blowing ash receiving ring.

[0015] Preferably, the reverse blowing dust removal mechanism further includes a primary layer intercepting ring plate, a primary layer guiding ring plate, primary layer guiding arc grooves, and a primary layer coating ring piece.

[0016] A primary layer intercepting ring plate is fixedly installed on the top surface of the ash receiving cavity. The bottom end of the primary layer intercepting ring plate inclines towards the dust removal cloth bag. A primary layer guiding ring plate is fixedly installed on the top surface of the reverse blowing ash receiving ring. The top end of the primary layer guiding ring plate inclines towards the dust removal cloth bag. A plurality of primary layer guiding arc grooves which are circumferentially and evenly distributed and located inside the primary layer intercepting ring plate and the primary layer guiding ring plate are formed between the top surface of the reverse blowing ash receiving ring and the top surface of the ash receiving cavity. A primary layer coating ring piece is fixedly installed at the top end of the primary layer guiding ring plate. The primary layer coating ring piece is made of a flexible material and has a gap with the outer side surface of the dust removal cloth bag.

[0017] Preferably, the reverse blowing lifting mechanism includes an air supply ring lifting screw rod, an air supply ring lifting nut, air supply ring lifting connecting rods, an air supply ring guiding rod, an ash receiving ring lifting screw rod, and an ash receiving ring guiding rod.

[0018] An air supply ring lifting screw rod located inside the dust removal cloth bag is rotatably installed between the bottom surface of the cloth bag mounting plate and the top surface of the cloth bag bottom plate. An air supply ring lifting nut is threadedly installed on the outer side of the air supply ring lifting screw rod. A plurality of air supply ring lifting connecting rods are fixedly installed between the outer side surface of the air supply ring lifting nut and the inner side surface of the reverse blowing air supply ring. A plurality of air supply ring guiding rods respectively penetrating through the plurality of air supply ring lifting connecting rods are fixedly installed between the bottom surface of the cloth bag mounting plate and the top surface of the cloth bag bottom plate.

[0019] An ash receiving ring lifting screw rod threadedly penetrating through the reverse blowing ash receiving ring is rotatably installed between the bottom surface of the cloth bag mounting plate and the top surface of the cloth bag bottom plate. An ash receiving ring guiding rod penetrating through the reverse blowing ash receiving ring is fixedly installed between the bottom surface of the cloth bag mounting plate and the top surface of the cloth bag bottom plate.

[0020] Preferably, the tops of the air supply ring lifting screw rod and the ash receiving ring lifting screw rod both penetrate upward above the dust bag mounting plate, and screw drive sprockets are coaxially and fixedly installed at the tops of both. A screw drive chain is installed between the two screw drive sprockets. The tops of the multiple ash receiving ring lifting screw rods are synchronously rotationally connected through a linkage chain. Screw bevel gears are coaxially and fixedly installed at the tops of the two symmetrically arranged ash receiving ring lifting screw rods located in the middle of the dust bag mounting plate. A double-shaft drive motor is fixedly installed in the middle of the top surface of the dust bag mounting plate. Drive bevel gears meshing with the screw bevel gears are coaxially and fixedly installed on the two rotating shafts of the double-shaft drive motor.

[0021] Preferably, the flapping and vibrating mechanism includes a flapping and vibrating gear, a flapping return torsion spring, a flapping and vibrating rod, a flapping and vibrating plate, a flapping drive one-way wheel, and a flapping drive tooth;

[0022] A flapping and vibrating gear is coaxially and rotatably installed on the outer side of the bottom end of each air supply ring guide rod. A flapping return torsion spring is connected between the flapping and vibrating gear and the air supply ring guide rod. The outer side of the flapping and vibrating gear is fixedly connected with a flapping and vibrating rod. The other end of the flapping and vibrating rod is fixedly installed with a flapping and vibrating plate that abuts against the inner side surface of the dust removal bag. A flapping drive one-way wheel is coaxially and fixedly installed on the outer side of the bottom end of the air supply ring lifting screw rod. Multiple groups of flapping drive teeth are circumferentially distributed at equal intervals on the outer side of the flapping drive one-way wheel.

[0023] The beneficial effects of the present invention are as follows:

[0024] 1. The backwashing dust removal mechanism can provide a backwashing air flow blowing from the inner side surface of the dust removal bag to the outer side thereof, thereby blowing off the dust layer on the outer side surface of the dust removal bag and discharging the blown-off dust centrally, avoiding the dust from spreading in the dust collector body and also avoiding the dust from adhering to the outer side of the dust removal bag again. Moreover, the backwashing dust removal mechanism can move up and down along the dust removal bag for cleaning without inflating the dust removal bag, avoiding the situation that the gaps between the fibers of the dust removal bag become larger due to multiple inflations and affecting the filtering effect. In addition, when the backwashing dust removal mechanism performs backwashing dust removal, it can also repair the primary layer to avoid the primary layer being damaged and affecting the filtering effect.

[0025] 2. The initial position of the backwashing dust removal mechanism is at the top of the dust removal bag. The backwashing lifting mechanism can drive the backwashing dust removal mechanism to move up and down inside the dust removal bag. When the backwashing dust removal mechanism moves downward, it can perform backwashing dust removal on the dust removal bag. When the backwashing lifting mechanism drives the backwashing dust removal mechanism to move upward, the backwashing dust removal mechanism can be reset to the top of the dust removal bag. During the process of the backwashing dust removal mechanism moving downward for dust removal, the flapping and vibrating mechanism can continuously flap the dust removal bag to make the dust removal bag vibrate, thereby cooperating with the backwashing dust removal mechanism for dust removal.

[0026] 3. During use, the backflush air supply ring and the backflush ash receiving ring move synchronously. The backflush air supply pipe can supply high-pressure gas to the air supply cavity inside the backflush air supply ring. The high-pressure gas passes through the dust removal cloth bag from the inside to the outside, so that the dust on the outer side of the dust removal cloth bag located between the backflush air supply ring and the backflush ash receiving ring can be blown off. During the process of the backflush air supply ring and the backflush ash receiving ring moving downward along the dust removal cloth bag, automatic backflush dust removal of the dust removal cloth bag can be realized. The blown-off dust is inside the ash receiving cavity and will not disperse inside the dust collector body, but is blown downward into the inside of the ash collection box through the backflush discharge pipe.

[0027] 4. The gas inside the air supply cavity passes through the dust removal cloth bag and blows to its outer side. A part of the gas can be intercepted by the primary interception ring plate and flows out of the outside of the ash receiving cavity from the inclined surface of the primary interception ring plate through multiple primary diversion arc grooves, and then flows along the inner inclined surface of the primary diversion ring plate to the outer side surface of the dust removal cloth bag after backflush, so that a part of the dust contained in the air flow adheres to the outer side surface of the dust removal cloth bag again. When the backflush air supply ring moves downward, the primary coating ring piece can evenly coat the dust that adheres to the outer side surface of the dust removal cloth bag again, so that a part of the dust is squeezed into the fiber gaps of the dust removal cloth bag, thus forming a primary layer again. This operation can repair the primary layer on the outer side of the dust removal cloth bag after backflush dust removal, avoid the primary layer being completely cleaned by backflush, and can save the time for the primary layer to form again.

[0028] 5. When the flapping vibration gear rotates, it can drive the flapping vibration rod and the flapping vibration plate away from the inner side surface of the dust removal cloth bag, and drive the flapping return torsion spring to rotate and store energy. When the external force is removed, the flapping vibration gear can quickly reverse and reset under the elastic force of the flapping return torsion spring, thereby driving the flapping vibration rod and the flapping vibration plate to quickly flap against the inner side surface of the dust removal cloth bag, causing the dust removal cloth bag to vibrate. By continuously flapping the dust removal cloth bag through multiple flapping vibration plates, the dust removal operation of the backflush dust removal mechanism can be assisted. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a three-dimensional schematic diagram of the present invention.

[0030] Figure 2 is a right-side sectional view of the present invention.

[0031] Figure 3 is a front three-dimensional sectional view of the present invention.

[0032] Figure 4 is a front plane sectional view of the present invention.

[0033] Figure 5 is the present invention Figure 3 an enlarged view of part A in.

[0034] Figure 6 For the present invention Figure 4 An enlarged view of part B in the present invention.

[0035] Figure 7 For the present invention Figure 5 An enlarged view of part C in the present invention.

[0036] Figure 8 For the present invention Figure 7 An enlarged view of part D in the present invention.

[0037] Figure 9 For the present invention Figure 6 An enlarged view of part E in the present invention.

[0038] Figure 10 For the present invention Figure 6 A three-dimensional sectional view of the F-F section in the present invention.

[0039] Figure 11 A top view sectional view of the top cover of the present invention.

[0040] Figure 12 For the present invention Figure 3 An enlarged view of part G in the present invention.

[0041] Figure 13 A top view sectional view of the flapping vibration mechanism of the present invention.

[0042] In the figure: 1. Dust collector body; 2. Top cover; 3. Ash collection box; 4. Dust bag mounting plate; 5. Dust removal bag; 6. Air suction hole; 7. Air inlet pipe; 8. Air outlet pipe; 9. Reverse blowing dust removal mechanism; 10. Reverse blowing lifting mechanism; 11. Dust bag bottom plate; 12. Bottom plate connecting rod; 13. Flapping vibration mechanism; 14. Ash discharge pipe; 15. Ash discharge auger; 16. Ash collection and suction cylinder; 17. Ash collection box filter screen; 18. Reverse blowing air supply ring; 19. Air supply cavity; 20. Reverse blowing ash receiving ring; 21. Ash receiving cavity; 22. Reverse blowing air supply pipe; 23. Reverse blowing air supply pipe shaft; 24. Reverse blowing discharge pipe; 25. Discharge check valve; 26. Dust bag scraper; 27. Primary layer interception ring plate; 28. Primary layer diversion ring plate; 29. Primary layer diversion arc groove; 30. Primary layer coating ring piece; 31. Air supply ring lifting lead screw; 32. Air supply ring lifting nut; 33. Air supply ring lifting connecting rod; 34. Air supply ring guide rod; 35. Ash receiving ring lifting lead screw; 36. Ash receiving ring guide rod; 37. Lead screw drive sprocket; 38. Lead screw drive chain; 39. Linkage chain; 40. Lead screw bevel gear; 41. Double-shaft drive motor; 42. Drive bevel gear; 43. Flapping vibration gear; 44. Flapping return torsion spring; 45. Flapping vibration rod; 46. Flapping vibration plate; 47. Flapping drive one-way wheel; 48. Flapping drive tooth. Detailed implementation manners

[0043] Next, reference will be made to the attached Figure 1 to the attached Figure 13A detailed description is given of the embodiments of the present invention.

[0044] Embodiment 1, as shown in the appendix Figures 1 - 13 As shown, a bag filter for fiberboard production includes a dust collector body 1 with an open top. A top cover 2 is installed at the top of the dust collector body 1. The bottom of the dust collector body 1 is funnel-shaped and fixedly installed with an ash collection box 3. Both the top cover 2 and the ash collection box 3 are detachably installed on the dust collector body 1 through flanges and bolts. By disassembling the two, the internal structure of the dust collector body 1 can be installed and disassembled. Inside the inner opening of the top of the dust collector body 1, a bag installation plate 4 is detachably installed. After opening the top cover 2, the bag installation plate 4 can be installed and disassembled by bolts. At the bottom of the bag installation plate 4, a plurality of dust removal bags 5 arranged in a rectangular array are fixedly installed. Existing filter bags can be selected for the dust removal bags 5. The number of dust removal bags 5 can be determined according to the usage requirements. In this embodiment of the application, six dust removal bags 5 are used. Suction holes 6 located inside each dust removal bag 5 penetrate through the upper and lower surfaces of the bag installation plate 4. The air inside the dust removal bag 5 can enter the inside of the top cover 2 through the suction holes 6. On the side of the bottom end of the dust collector body 1, an air inlet pipe 7 is fixedly installed and communicated with its inside. The air containing dust can enter the inside of the dust collector body 1 from the air inlet pipe 7. On the side of the top cover 2, an air outlet pipe 8 is installed and communicated with its inside. The air inside the dust collector body 1 can be extracted through the air outlet pipe 8, so that the air inside the dust removal bag 5 is discharged from the suction holes 6. The dust-containing gas inside the dust collector body 1 passes through the dust removal bag 5 to reach its inside and is discharged from the air outlet pipe 8 through the suction holes 6, while the dust is intercepted by the dust removal bag 5;

[0045] On both the inner and outer sides of each dust removal bag 5, an anti-blowing dust removal mechanism 9 that can move up and down is installed. The anti-blowing dust removal mechanism 9 can provide an anti-blowing air flow that blows from the inner side of the dust removal bag 5 to its outer side, so as to blow off the dust layer on the outer side of the dust removal bag 5 and centrally discharge the blown-off dust, avoiding the dust from spreading inside the dust collector body 1 and also avoiding the dust from re-adhering to the outer side of the dust removal bag 5. Moreover, the anti-blowing dust removal mechanism 9 can move up and down along the dust removal bag 5 for cleaning without inflating the dust removal bag 5, avoiding the situation that the gaps between the fibers of the dust removal bag 5 become larger due to multiple inflations, which affects the filtering effect;

[0046] In addition, while the anti-blowing dust removal mechanism 9 is performing anti-blowing dust removal, it can also repair the initial layer to avoid the initial layer being damaged and affecting the filtering effect;

[0047] The bottom of the cloth bag mounting plate 4 is provided with a backflush lifting mechanism 10 inside each dust removal cloth bag 5. The initial position of the backflush dust removal mechanism 9 is at the top of the dust removal cloth bag 5. The backflush lifting mechanism 10 can drive the backflush dust removal mechanism 9 to lift and lower inside the dust removal cloth bag 5. When the backflush dust removal mechanism 9 moves downward, it can perform backflush dust removal on the dust removal cloth bag 5. When the backflush lifting mechanism 10 drives the backflush dust removal mechanism 9 to move upward, the backflush dust removal mechanism 9 can be reset to the top of the dust removal cloth bag 5. The bottom of each dust removal cloth bag 5 is fixedly provided with a cloth bag bottom plate 11. A bottom plate connecting rod 12 is fixedly connected between each cloth bag bottom plate 11 and the inner wall of the dust collector body 1. The top of each cloth bag bottom plate 11 is provided with a flapping vibration mechanism 13 inside the dust removal cloth bag 5. During the process of the backflush dust removal mechanism 9 moving downward for dust removal, the flapping vibration mechanism 13 can continuously flap the dust removal cloth bag 5 to make the dust removal cloth bag 5 vibrate, so as to cooperate with the backflush dust removal mechanism 9 for dust removal.

[0048] Embodiment 2. On the basis of Embodiment 1, as shown in the attached Figures 1 - 4 figure, an ash discharge pipe 14 communicating with its interior is installed on the front side of the ash collection box 3. An ash discharge auger 15 is rotatably installed inside the ash collection box 3. When the ash discharge auger 15 rotates, the dust falling into the interior of the ash collection box 3 can be discharged from the ash discharge pipe 14. A dust collection suction cylinder 16 is fixedly installed on the side of the ash collection box 3. A dust collection box filter screen 17 is installed through and between the interior of the dust collection suction cylinder 16 and the interior of the ash collection box 3. In order to prevent the cleaned dust from floating in the dust collector body 1 without falling or having a slow falling speed, the dust collection suction cylinder 16 sucks the interior of the ash collection box 3, so that an outward flowing air current is generated inside the ash collection box 3. The air current can drive the dust inside the dust collector body 1 to quickly enter the interior of the ash collection box 3, and the dust collection box filter screen 17 can filter the dust.

[0049] Embodiment 3. On the basis of Embodiment 2, as shown in the attached Figures 2 - 10 figure, the backflush dust removal mechanism 9 includes a backflush air supply ring 18, an air supply cavity 19, a backflush ash receiving ring 20, an ash receiving cavity 21, a backflush air supply pipe 22, a backflush air supply pipe shaft 23, a backflush discharge pipe 24, and a discharge one-way valve 25;

[0050] Inside the dust removal cloth bag 5, there is an air supply ring 18 for reverse blowing that can move up and down. The outer side of the air supply ring 18 for reverse blowing is in contact with the inner side of the dust removal cloth bag 5. An air supply cavity 19 is circumferentially formed on the outer side of the air supply ring 18 for reverse blowing. On the outside of the dust removal cloth bag 5, there is an ash receiving ring 20 for reverse blowing that can move up and down synchronously with the air supply ring 18 for reverse blowing. The inner side of the ash receiving ring 20 for reverse blowing is in contact with the outer side of the dust removal cloth bag 5. A dust receiving cavity 21 is circumferentially formed on the inner side of the ash receiving ring 20 for reverse blowing. There is a gap between the inner side of the ash receiving ring 20 for reverse blowing and the outer side of the dust removal cloth bag 5, and the size of this gap is 2.5 mm - 3.5 mm. After the dust receiving cavity 21 is formed on the inner side of the ash receiving ring 20 for reverse blowing, a plurality of soft sealing pieces are fixedly connected to both the upper and lower ends of its inner side. The inner side of the ash receiving ring 20 for reverse blowing is in contact with the outer side of the dust removal cloth bag 5 through two sealing pieces. The top of the air supply ring 18 for reverse blowing is provided with a reverse blowing air supply pipe 22 that communicates with the inside of the air supply cavity 19;

[0051] During use, the air supply ring 18 for reverse blowing and the ash receiving ring 20 for reverse blowing move synchronously. The reverse blowing air supply pipe 22 can supply high-pressure gas to the air supply cavity 19 inside the air supply ring 18 for reverse blowing. The high-pressure gas passes through the dust removal cloth bag 5 from the inside to the outside, so that the dust on the outside of the dust removal cloth bag 5 between the air supply ring 18 for reverse blowing and the ash receiving ring 20 for reverse blowing can be blown off. During the process of the air supply ring 18 for reverse blowing and the ash receiving ring 20 for reverse blowing moving downward along the dust removal cloth bag 5, automatic reverse blowing and dust removal of the dust removal cloth bag 5 can be realized. The blown-off dust is inside the dust receiving cavity 21 and will not disperse inside the dust collector body 1, but is blown downward into the inside of the ash collection box 3 through the reverse blowing discharge pipe 24.

[0052] Embodiment 4, on the basis of Embodiment 3, as shown in the appendix Figures 2 - 10 As shown, a reverse blowing air supply pipe shaft 23 is rotatably installed at the top of the cloth bag mounting plate 4. The reverse blowing air supply pipe shaft 23 is connected with a torsion spring. The other end of the reverse blowing air supply pipe 22 passes through the cloth bag mounting plate 4 upward and is wound around the outside of the reverse blowing air supply pipe shaft 23. When the air supply ring 18 for reverse blowing moves downward, it is necessary to pull the reverse blowing air supply pipe 22 to move synchronously. The reverse blowing air supply pipe 22 then pulls the reverse blowing air supply pipe shaft 23 to rotate and drives the torsion spring to rotate and store energy. When the air supply ring 18 for reverse blowing moves upward, the reverse blowing air supply pipe shaft 23 can reverse and reset under the elastic force of the torsion spring and wind the reverse blowing air supply pipe 22;

[0053] An anti-blowing ash-removing pipe 24 communicating with its interior is installed on the outer side of the anti-blowing ash-removing ring 20. An outlet one-way valve 25 is installed in the anti-blowing ash-removing pipe 24, so that the dust-containing air inside the ash-removing cavity 21 can only be discharged through the anti-blowing ash-removing pipe 24, and the air inside the dust collector body 1 cannot enter the ash-removing cavity 21 through the anti-blowing ash-removing pipe 24. The bottom end of the anti-blowing ash-removing pipe 24 is bent towards the outer side of the dust-removing bag 5. When the high-pressure dust-containing gas is discharged from the bottom end of the anti-blowing ash-removing pipe 24, the discharged high-pressure dust-containing gas can blow the outer surface of the un-cleaned dust-removing bag 5 below it, so that the high-pressure gas drives the rapidly flowing dust to impact the dust on the outer surface of the dust-removing bag 5, enabling a part of the dust on the outermost layer of the dust-removing bag 5 to fall off in advance;

[0054] A cloth bag scraper 26 abutted against the outer side of the dust-removing bag 5 is fixedly installed at the bottom of the anti-blowing ash-removing ring 20. When the anti-blowing ash-removing ring 20 moves downward, the cloth bag scraper 26 can initially scrape the dust on the surface of the dust-removing bag 5.

[0055] Embodiment 5, on the basis of Embodiment 4, as shown in the appendix Figures 7 - 10 The anti-blowing dust-removing mechanism 9 further includes a primary layer intercepting ring plate 27, a primary layer guiding ring plate 28, a primary layer guiding arc groove 29, and a primary layer coating ring piece 30;

[0056] A primary layer intercepting ring plate 27 is fixedly installed on the top surface of the ash-removing cavity 21. The bottom end of the primary layer intercepting ring plate 27 inclines towards the dust-removing bag 5. A primary layer guiding ring plate 28 is fixedly installed on the top surface of the anti-blowing ash-removing ring 20. The top end of the primary layer guiding ring plate 28 inclines towards the dust-removing bag 5. A plurality of circumferentially uniformly distributed primary layer guiding arc grooves 29 located inside the primary layer intercepting ring plate 27 and the primary layer guiding ring plate 28 are formed between the top surface of the anti-blowing ash-removing ring 20 and the top surface of the ash-removing cavity 21. A primary layer coating ring piece 30 is fixedly installed at the top end of the primary layer guiding ring plate 28. The primary layer coating ring piece 30 is made of a flexible material (rubber sheet can be selected) and has a gap with the outer side of the dust-removing bag 5. The thickness of the primary layer of the bag-type dust collector is usually 2.5 to 3.5 millimeters, so the size of this gap is set to 2.5mm - 3.5mm;

[0057] During use, the gas inside the air supply chamber 19 passes through the dust removal cloth bag 5 and blows outward. Part of the gas can be intercepted by the primary interception ring plate 27 and flows out of the outside of the ash receiving chamber 21 along the inclined surface of the primary interception ring plate 27 from multiple primary diversion arc grooves 29. Then, it flows along the inner inclined surface of the primary diversion ring plate 28 to the outer side of the dust removal cloth bag 5 after back blowing, so that part of the dust contained in the air flow adheres to the outer side of the dust removal cloth bag 5 again. When the back blowing air supply ring 18 moves downward, the primary coating ring piece 30 can squeeze and smear the dust that has adhered to the outer side of the dust removal cloth bag 5 evenly, and part of the dust is squeezed into the fiber gaps of the dust removal cloth bag 5, thereby forming a primary layer of a certain thickness again. This operation can repair the primary layer on the outside of the dust removal cloth bag 5 after back blowing dust removal, prevent the primary layer from being completely cleaned by back blowing, and save the time for the primary layer to form again;

[0058] When the back blowing air supply ring 18 and the back blowing ash receiving ring 20 move from the bottom end to the top end of the dust removal cloth bag 5, the back blowing air supply pipe 22 no longer supplies air to the inside of the air supply chamber 19, that is, only when the back blowing air supply ring 18 and the back blowing ash receiving ring 20 move downward, the back blowing dust removal operation is carried out. During the process of their upward movement and reset, the back blowing dust removal operation is not carried out to avoid damaging the primary layer after smearing and repairing. When they move upward, there is a gap between the primary coating ring piece 30 and the outer side of the dust removal cloth bag 5, so the new primary layer will not be damaged. And the multiple soft sealing pieces inside the back blowing ash receiving ring 20 can undergo flexible deformation. Although they may contact the primary layer, they will not have a great impact on the new primary layer.

[0059] Embodiment Six, on the basis of Embodiment Three, as shown in the attached Figures 5 - 11 figure, the back blowing lifting mechanism 10 includes an air supply ring lifting lead screw 31, an air supply ring lifting nut 32, an air supply ring lifting connecting rod 33, an air supply ring guide rod 34, an ash receiving ring lifting lead screw 35, and an ash receiving ring guide rod 36;

[0060] A rotatable air supply ring lifting lead screw 31 is installed between the bottom surface of the cloth bag mounting plate 4 and the top surface of the cloth bag bottom plate 11 inside the dust removal cloth bag 5. The outer side of the air supply ring lifting lead screw 31 is threadedly installed with an air supply ring lifting nut 32. A plurality of air supply ring lifting connecting rods 33 are fixedly installed between the outer side surface of the air supply ring lifting nut 32 and the inner side surface of the back blowing air supply ring 18. A plurality of air supply ring guide rods 34 respectively passing through the plurality of air supply ring lifting connecting rods 33 are fixedly installed between the bottom surface of the cloth bag mounting plate 4 and the top surface of the cloth bag bottom plate 11. When the air supply ring lifting lead screw 31 rotates, it can drive the air supply ring lifting nut 32 and the plurality of air supply ring lifting connecting rods 33 to slide up and down along the plurality of air supply ring guide rods 34 respectively, so as to realize the up and down movement of the back blowing air supply ring 18;

[0061] A dust collection bag lifting screw rod 35 that penetrates through the reverse blowing ash collection ring 20 in a threaded manner is rotatably installed between the bottom surface of the dust collection bag mounting plate 4 and the top surface of the dust collection bag bottom plate 11. The reverse blowing ash collection ring 20 is in threaded cooperation with the dust collection bag lifting screw rod 35. A dust collection bag guiding rod 36 that penetrates through the reverse blowing ash collection ring 20 is fixedly installed between the bottom surface of the dust collection bag mounting plate 4 and the top surface of the dust collection bag bottom plate 11. When the dust collection bag lifting screw rod 35 rotates, it can drive the reverse blowing ash collection ring 20 to slide up and down along the dust collection bag guiding rod 36. During use, the air supply ring lifting screw rod 31 and the dust collection bag lifting screw rod 35 can be rotated simultaneously, so that the reverse blowing air supply ring 18 and the reverse blowing ash collection ring 20 can move up and down synchronously. During the process of the reverse blowing air supply ring 18 and the reverse blowing ash collection ring 20 moving from the top end of the dust collection bag 5 to its bottom end, reverse blowing dust removal is performed. After moving from the bottom end of the dust collection bag 5 to its top end (no reverse blowing dust removal is performed during this process), a complete reverse blowing dust removal operation is completed.

[0062] Embodiment Seven. On the basis of Embodiment Six, as shown in the attached Figure 5 、 Figure 6 、 Figure 11 figures, the top ends of both the air supply ring lifting screw rod 31 and the dust collection bag lifting screw rod 35 penetrate upward above the dust collection bag mounting plate 4, and screw drive sprockets 37 are coaxially fixedly installed at the top ends of both. A screw drive chain 38 is installed between the two screw drive sprockets 37, so that they can rotate synchronously. The top ends of multiple dust collection bag lifting screw rods 35 are synchronously rotationally connected through a linkage chain 39, so that the multiple dust collection bag lifting screw rods 35 can rotate synchronously. Screw bevel gears 40 are coaxially fixedly installed at the top ends of two symmetrically arranged dust collection bag lifting screw rods 35 located in the middle of the dust collection bag mounting plate 4. A double-shaft drive motor 41 is fixedly installed in the middle of the top surface of the dust collection bag mounting plate 4. The double-shaft drive motor 41 is connected to a power supply and a controller. Driving bevel gears 42 that mesh with the screw bevel gears 40 are coaxially fixedly installed on the two rotating shafts of the double-shaft drive motor 41. Starting the double-shaft drive motor 41 can drive the two driving bevel gears 42 to rotate. The two driving bevel gears 42 can simultaneously drive the two screw bevel gears 40 to rotate synchronously. Through the connection of the linkage chain 39 and the screw drive chain 38, multiple air supply ring lifting screw rods 31 and dust collection bag lifting screw rods 35 can rotate synchronously, so as to achieve the effect of simultaneously performing reverse blowing dust removal for multiple reverse blowing dust removal mechanisms 9.

[0063] Embodiment Eight. On the basis of Embodiment Six, as shown in the attached Figure 3 、 Figure 12 、 Figure 13 figures, the flapping vibration mechanism 13 includes a flapping vibration gear 43, a flapping return torsion spring 44, a flapping vibration rod 45, a flapping vibration plate 46, a flapping drive one-way wheel 47, and a flapping drive tooth 48;

[0064] On the outer side of the bottom end of each of the air supply ring guide rods 34, a flapping vibration gear 43 is coaxially and rotatably installed. A flapping return torsion spring 44 is connected between the flapping vibration gear 43 and the air supply ring guide rod 34. A flapping vibration rod 45 is fixedly connected to the outer side of the flapping vibration gear 43. The other end of the flapping vibration rod 45 is fixedly installed with a flapping vibration plate 46 that abuts against the inner side surface of the dust removal cloth bag 5. When the flapping vibration gear 43 does not rotate, the flapping vibration plate 46 abuts against the inner side surface of the dust removal cloth bag 5. When an external force drives the flapping vibration gear 43 to rotate, it can drive the flapping vibration rod 45 and the flapping vibration plate 46 away from the inner side surface of the dust removal cloth bag 5, and drive the flapping return torsion spring 44 to rotate and store energy. When the external force is withdrawn, the flapping vibration gear 43 can quickly reverse and reset under the elastic force of the flapping return torsion spring 44, thereby driving the flapping vibration rod 45 and the flapping vibration plate 46 to quickly flap towards the inner side surface of the dust removal cloth bag 5, causing the dust removal cloth bag 5 to vibrate. By continuously flapping the dust removal cloth bag 5 with multiple flapping vibration plates 46, the dust removal operation of the reverse blowing dust removal mechanism 9 is assisted;

[0065] On the outer side of the bottom end of the air supply ring lifting screw rod 31, a flapping drive one-way wheel 47 is coaxially and fixedly installed. The flapping drive one-way wheel 47 is divided into an inner wheel and an outer wheel. There is a ratchet and pawl mechanism between the inner wheel and the outer wheel, which enables the outer wheel to rotate in one direction when the inner wheel rotates, and the outer wheel does not rotate when the inner wheel rotates in the other direction (which can be referred to the sprocket of the rear wheel of a bicycle). A plurality of groups of flapping drive teeth 48 are circumferentially distributed at equal intervals on the outer side of the flapping drive one-way wheel 47. When the air supply ring lifting screw rod 31 rotates and drives the reverse blowing air supply ring 18 to move downward for reverse blowing dust removal operation, it can drive the flapping drive one-way wheel 47 to rotate, so that a plurality of groups of flapping drive teeth 48 on its outer side can be intermittently engaged with a plurality of flapping vibration gears 43 in sequence, and drive the flapping vibration gears 43 to rotate by a certain angle. When the flapping drive teeth 48 are disengaged from the flapping vibration gears 43, the flapping vibration gears 43 can drive the flapping vibration plates 46 to quickly reverse and reset under the elastic force of the flapping return torsion springs 44 to flap the dust removal cloth bag 5. When the air supply ring lifting screw rod 31 rotates in the reverse direction to drive the reverse blowing air supply ring 18 to move upward and reset, at this time, the air supply ring lifting screw rod 31 can only drive the inner wheel of the flapping drive one-way wheel 47 to rotate on its own, and will not drive its outer wheel to rotate. At this time, the flapping vibration gears 43 will not be able to rotate, so that during the upward reset process of the reverse blowing dust removal mechanism 9, no flapping vibration operation will be performed, thus avoiding damage to the new initial layer.

[0066] It should be noted that in the description of the present invention, the terms indicating directions or positional relationships such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0067] In addition, it should also be noted that in the description of the present invention, unless otherwise clearly specified and defined, the terms "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0068] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present invention.

Claims

1. A bag dust collector for fiberboard production, characterized in that: The invention comprises a dust collector body (1) with a top opening, a top cover (2) being installed on the top of the dust collector body (1), a funnel-shaped bottom on which a dust collecting box (3) is fixedly installed, a bag mounting plate (4) being detachably installed on the inner side of the top opening of the dust collector body (1), a plurality of dust bags (5) in a rectangular array being fixedly installed on the bottom of the bag mounting plate (4), an air suction hole (6) located on the inner side of each dust bag (5) being penetrated through the upper and lower surfaces of the bag mounting plate (4), an air inlet pipe (7) communicating with the interior of the dust collector body (1) being fixedly installed on the side surface of the bottom end of the dust collector body (1), and the top opening of the dust collector body (1) being fixedly installed with the air inlet pipe (7) being connected with the interior of the dust collector body (1). An air outlet pipe (8) connected to the inside of the cover (2) is installed on the side surface of the cover (2); a back-blowing dust removal mechanism (9) movable up and down is installed on the inner and outer sides of each dust removal bag (5); a back-blowing lifting mechanism (10) located inside each dust removal bag (5) is installed at the bottom of the bag mounting plate (4); a bag bottom plate (11) is fixedly installed at the bottom of each dust removal bag (5); a bottom plate connecting rod (12) is fixedly connected between each bag bottom plate (11) and the inner wall of the dust collector body (1); and a beating vibration mechanism (13) located inside the dust removal bag (5) is installed on the top of each bag bottom plate (11); The back-blowing dust removal mechanism (9) comprises a back-blowing air supply ring (18), an air supply cavity (19), a back-blowing ash receiving ring (20), an ash receiving cavity (21), a back-blowing air supply pipe (22), a back-blowing air supply pipe shaft (23), a back-blowing discharge pipe (24), and a discharge one-way valve (25); The dust bag (5) is provided with a back-blowing air supply ring (18) that can move up and down, and the outer side surface of the back-blowing air supply ring (18) is in contact with the inner side surface of the dust bag (5), and an air supply cavity (19) is circumferentially provided on the outer side surface of the back-blowing air supply ring (18); the outer side of the dust bag (5) is provided with a back-blowing ash receiving ring (20) that can move up and down synchronously with the back-blowing air supply ring (18), and the inner side surface of the back-blowing ash receiving ring (20) is in contact with the outer side surface of the dust bag (5), and an ash receiving cavity (21) is circumferentially provided on the inner side surface of the back-blowing ash receiving ring (20); and a back-blowing air supply pipe (22) that is connected to the inside of the air supply cavity (19) is installed on the top of the back-blowing air supply ring (18); A back-blowing air supply pipe shaft (23) is rotatably mounted on the top of the bag mounting plate (4), and the back-blowing air supply pipe shaft (23) is connected to a torsion spring. The other end of the back-blowing air supply pipe (22) passes through the bag mounting plate (4) upward and is then wound around the outside of the back-blowing air supply pipe shaft (23). A back-blowing discharge pipe (24) connected to the inside of the back-blowing ash ring (20) is mounted on the outside of the back-blowing ash ring (20), and a discharge check valve (25) is mounted inside the back-blowing discharge pipe (24). The bottom end of the back-blowing discharge pipe (24) is bent toward the outside of the dust bag (5). A bag scraper (26) is fixedly mounted on the bottom of the back-blowing ash receiving ring (20) and is in contact with the outer side surface of the dust removal bag (5); The back-blowing dust removal mechanism (9) further comprises a primary interception ring plate (27), a primary guide ring plate (28), a primary guide arc groove (29), and a primary coating ring sheet (30); A primary intercepting ring plate (27) is fixedly mounted on the top surface of the ash receiving chamber (21), and the bottom end of the primary intercepting ring plate (27) is inclined toward the dust bag (5). A primary guide ring plate (28) is fixedly mounted on the top surface of the back-blowing ash receiving ring (20), and the top end of the primary guide ring plate (28) is inclined toward the dust bag (5). A plurality of primary guide arc grooves (29) are uniformly distributed in the circumferential direction and are located on the inner sides of the primary intercepting ring plate (27) and the primary guide ring plate (28) between the top surface of the back-blowing ash receiving ring (20) and the top surface of the ash receiving chamber (21). A primary coating ring sheet (30) is fixedly mounted on the top end of the primary guide ring plate (28), and the primary coating ring sheet (30) is made of a flexible material and has a gap between the outer side surfaces of the dust bag (5).

2. A bag filter for fiberboard production according to claim 1, characterized in that: An ash discharge pipe (14) communicating with the interior of the ash collecting box (3) is installed on the front side surface thereof, an ash discharge auger (15) is rotatably installed inside the ash collecting box (3), an ash collecting air suction cylinder (16) is fixedly installed on the side surface of the ash collecting box (3), and an ash collecting box filter (17) penetrates and is installed between the interior of the ash collecting air suction cylinder (16) and the interior of the ash collecting box (3).

3. A bag dust collector for fiberboard production according to claim 1, characterized in that: The back-blowing lifting mechanism (10) comprises an air supply ring lifting screw (31), an air supply ring lifting screw sleeve (32), an air supply ring lifting connecting rod (33), an air supply ring guide rod (34), an ash receiving ring lifting screw (35), and an ash receiving ring guide rod (36); An air supply ring lifting screw (31) located inside the dust removal bag (5) is rotatably mounted between the bottom surface of the bag mounting plate (4) and the top surface of the bag bottom plate (11); an air supply ring lifting screw sleeve (32) is threadedly mounted on the outer side of the air supply ring lifting screw sleeve (31); a plurality of air supply ring lifting connecting rods (33) are fixedly mounted between the outer side surface of the air supply ring lifting screw sleeve (32) and the inner side surface of the back-blowing air supply ring (18); and a plurality of air supply ring guide rods (34) respectively penetrating the plurality of air supply ring lifting connecting rods (33) are fixedly mounted between the bottom surface of the bag mounting plate (4) and the top surface of the bag bottom plate (11); An ash receiving ring lifting screw (35) threadedly penetrating the back-blowing ash receiving ring (20) is rotatably mounted between the bottom surface of the bag mounting plate (4) and the top surface of the bag bottom plate (11), and an ash receiving ring guide rod (36) penetrating the back-blowing ash receiving ring (20) is fixedly mounted between the bottom surface of the bag mounting plate (4) and the top surface of the bag bottom plate (11).

4. A bag dust collector for fiberboard production according to claim 3, characterized in that: The top ends of the air supply ring lifting screw (31) and the ash receiving ring lifting screw (35) are both extended upward to the top of the bag mounting plate (4), and the top ends of both are coaxially fixedly mounted with a screw driving sprocket (37), a screw driving chain (38) is installed between the two screw driving sprockets (37), and the top ends of the plurality of ash receiving ring lifting screws (35) are synchronously rotatedly connected via a linkage chain (39), and the top ends of two ash receiving ring lifting screws (35) located at two symmetrical positions in the middle of the bag mounting plate (4) are coaxially fixedly mounted with a screw bevel gear (40), and a dual-axis driving motor (41) is fixedly mounted in the middle of the top surface of the bag mounting plate (4), and a driving bevel gear (42) meshing with the screw bevel gear (40) is coaxially fixedly mounted on the two rotating shafts of the dual-axis driving motor (41).

5. A bag dust collector for fiberboard production according to claim 3, characterized in that: The flapping vibration mechanism (13) comprises a flapping vibration gear (43), a flapping reset torsion spring (44), a flapping vibration rod (45), a flapping vibration plate (46), a flapping drive one-way wheel (47), and a flapping drive tooth (48); A flapping vibration gear (43) is coaxially mounted on the outer side of the bottom end of each air supply ring guide rod (34), a flapping reset torsion spring (44) is connected between the flapping vibration gear (43) and the air supply ring guide rod (34), a flapping vibration rod (45) is fixedly connected to the outer side of the flapping vibration gear (43), and a flapping vibration plate (46) abutting against the inner side surface of the dust removal bag (5) is fixedly mounted on the other end of the flapping vibration rod (45), and a flapping drive one-way wheel (47) is coaxially mounted on the outer side of the bottom end of the air supply ring lifting screw (31), and a plurality of groups of flapping drive teeth (48) distributed circumferentially at equal intervals are arranged on the outer side of the flapping drive one-way wheel (47).

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