Flue gas absorption device of annealing furnace

Abstract

The invention relates to a flue gas absorption device of an annealing furnace, and relates to the field of environmental protection equipment, the flue gas absorption device comprises a fan, the fan comprises an air inlet pipe, a filter plate is connected in the air inlet pipe, a driven bevel gear is rotatably connected to the end face, close to an air inlet of the air inlet pipe, of the filter plate, and the axial direction of the driven bevel gear is the same as that of the filter plate; a rack penetrating through the filter plate and sliding in the axial direction of the air inlet pipe is further arranged in the air inlet pipe, and a driving bevel gear meshed with the driven bevel gear and the rack at the same time is further rotationally connected in the air inlet pipe; the driven bevel gear and the rack are jointly sleeved with a lantern ring, the axial direction of the lantern ring is arranged in the axial direction of the filter plate, the lantern ring is fixed to the driven bevel gear, and the outer side wall of the lantern ring is further fixedly connected with a scraping plate making contact with the filter plate. And a power assembly for driving the rack to move is arranged in the air inlet pipe. The device has the effect of maintaining the amount of gas supplied by the flue gas absorption device to other devices.

Description

Technical Field

[0001] The present application relates to the field of environmental protection equipment, and in particular to a fume absorption device for an annealing furnace. Background Art

[0002] The annealing furnace is a necessary device for the production of steel products. When the annealing furnace is working, a large amount of high-temperature flue gas will be generated, and the flue gas contains harmful substances, so the flue gas needs to be treated to meet the standards before it can be discharged to the outside; the existing flue gas absorption device includes a denitrification device connected to the annealing furnace outlet, and also includes a waste heat recovery boiler. The outlet of the denitrification device is connected to the air inlet of the flue gas pipeline of the waste heat recovery boiler through a pipeline, the air inlet of the medium pipeline of the waste heat recovery boiler is connected to a fan through a pipeline, the outlet of the flue gas pipeline of the waste heat recovery boiler is connected to a gas treatment device through a pipeline, and the outlet of the medium pipeline of the waste heat recovery boiler is connected to the air inlet of other heat-using devices through a pipeline.

[0003] When the annealing furnace is working, the flue gas in the annealing furnace first enters the denitrification device for denitrification, and then the flue gas enters the flue gas duct of the waste heat recovery boiler. At the same time, the fan draws clean air into the medium pipe of the waste heat recovery boiler. The flue gas entering the waste heat recovery boiler heats the clean air. The heated clean air provides heat for other devices, and then the flue gas in the flue gas duct is discharged to the outside after passing through the gas treatment device.

[0004] Since there is a lot of dust in the factory, filter plates are usually installed at the air inlet of the fan to filter the air. As dust accumulates on the filter plates, the air permeability of the filter plates deteriorates, and it is difficult for air to pass through the filter plates into the fan, resulting in a reduction in the amount of gas that the flue gas absorption device provides heat to other devices. Summary of the invention

[0005] In order to maintain the amount of gas provided by the flue gas absorption device to heat other devices, the present application provides a flue gas absorption device for an annealing furnace.

[0006] The present application provides a fume absorption device for an annealing furnace using the following technical solution: A fume absorption device for an annealing furnace comprises a fan, the fan comprises an air inlet pipe, a filter plate is connected to the air inlet pipe, a driven bevel gear is rotatably connected to the end surface of the filter plate close to the air inlet of the air inlet pipe, and the axial direction of the driven bevel gear is the same as the axial direction of the filter plate; The air inlet pipe is also provided with a rack that penetrates the filter plate and slides along the axial direction of the air inlet pipe, and the air inlet pipe is also rotatably connected with a driving bevel gear that meshes with the driven bevel gear and the rack at the same time; The driven bevel gear and the rack are both sleeved with a collar, the collar is axially arranged along the axial direction of the filter plate, and the collar is fixed to the driven bevel gear, and a scraper in contact with the filter plate is also fixedly connected to the outer wall of the collar; The air inlet pipe is provided with a power assembly for driving the rack to move.

[0007] By adopting the above technical solution, when the filter plate needs to be cleaned, the power assembly is started, and the power assembly drives the rack to move in the direction away from the air inlet of the air inlet pipe. At the same time, the rack transmits power to the scraper through the active bevel gear, the driven bevel gear and the ring in sequence, so that the scraper rotates. The rotation of the scraper can scrape off the dust particles attached to the end surface of the filter plate, so that the air can better enter the air inlet pipe, and can provide sufficient clean air for the waste heat recovery boiler, thereby maintaining the amount of gas that the flue gas absorption device uses to supply heat to other devices.

[0008] Optionally, the power assembly includes a hinged rod disposed in the air inlet pipe and sliding along the axial direction of the air inlet pipe, the hinged rod is located on a side of the filter plate away from the scraper plate, the axial direction of the hinged rod is disposed along the radial direction of the air inlet pipe, and one end of the hinged rod penetrates the side wall of the air inlet pipe, and the rack is fixed to the hinged rod; Two power plates are hinged on the hinged rod, a matching plate is provided between the two power plates, and the length of the matching plate is greater than the diameter of the hinged rod; The matching plate is connected with a support rod that penetrates the air inlet pipe and slides along the axial direction of the air inlet pipe. The support rod is rotatably connected with a threaded rod that is arranged along the axial direction of the air inlet pipe in the length direction at a position on the side wall of the support rod close to the hinge rod and located outside the air inlet pipe. The threaded rod penetrates the hinge rod and is threadedly connected with the hinge rod. A return spring is fixedly connected to the hinge rod, and one end of the return spring away from the hinge rod is connected to the side wall of the air inlet pipe at a position on the hinge rod away from the filter plate.

[0009] By adopting the above technical solution, in the initial state, the filter plate works normally. At this time, there is a gap between the matching plate and the hinged rod. The wind force makes both power plates contact the matching plate, the two power plates are folded, and the reset spring is in an incompletely compressed state. When the filter plate needs to be cleaned, fix the hinged rod and rotate the threaded rod. The threaded rod cooperates with the hinged rod to move the support rod and the matching plate toward the hinged rod. The matching plate moves and pushes the two power plates to rotate, so that the two power plates are gradually flattened. As the fan continues to work, the pressure difference on both sides of the power plate gradually increases, and the pressure difference causes the power plate to drive the matching plate, the hinged rod and the rack to move away from the air inlet of the air inlet pipe.

[0010] When the support rod and the hinged rod stop moving, the support rod is fixed and the threaded rod is rotated. The threaded rod cooperates with the support rod to make the hinged rod drive the power plate to move away from the matching plate. The wind force makes the power plate rotate, so that the two power plates are gradually folded, and the pressure difference on both sides of the two power plates is gradually reduced. At the same time, the reset spring restores the deformation and pushes the hinged rod, the matching plate, the power plate and the rack to move in the direction close to the air inlet of the air inlet pipe.

[0011] Optionally, a strip hole corresponding to the hinge rod is provided on the air inlet pipe, the length direction of the strip hole is arranged along the axial direction of the air inlet pipe, and the hinge rod and the support rod are both slidably inserted in the strip hole.

[0012] By adopting the above technical solution, the strip-shaped hole guides the hinged rod and the support rod, so that the hinged rod and the support rod can slide better along the axial direction of the air inlet pipe.

[0013] Optionally, a slider is fixedly connected to the lower end of the hinged rod, a sliding groove corresponding to the slider is provided on the inner wall of the air inlet pipe, the length direction of the sliding groove is arranged along the axial direction of the air inlet pipe, and the slider is slidably inserted in the sliding groove.

[0014] By adopting the above technical solution, the sliding block cooperates with the sliding groove, so that the hinge rod and the air inlet pipe are slidably matched.

[0015] Optionally, a collecting box with an open top is connected to the side of the filter plate away from the hinged rod in the air inlet duct, a cover plate for sealing the collecting box is slidably connected to the collecting box, and a sliding component for driving the cover plate to move is provided in the air inlet duct.

[0016] By adopting the above technical solution, when the filter plate is working normally, the cover plate blocks the opening of the collection box; when the scraper rotates to scrape the dust particles on the filter plate, the sliding assembly works and drives the cover plate to move, and the cover plate moves to expose the opening of the collection box, and the dust particles scraped off by the scraper can fall into the collection box for collection; in the process of resetting the scraper, the sliding assembly works to drive the cover plate to move, and the cover plate moves to block the opening of the collection box, preventing the dust particles in the collection box from being covered on the filter plate again with the airflow.

[0017] Optionally, the sliding assembly includes a sleeve hinged on the end face of the filter plate away from the hinged rod, there is a gap between the sleeve and the filter plate, both ends of the sleeve are slidably plugged with plug rods, the ends of the two plug rods away from each other are both located outside the sleeve, one of the plug rods is hinged at one end outside the sleeve to the rack, and the other plug rod is hinged at one end outside the sleeve to the cover plate, and in the initial state, the upper end of the sleeve is inclined in the direction away from the filter plate.

[0018] By adopting the above technical solution, when the rack moves in the direction away from the air inlet of the air inlet pipe, the rack drives the corresponding plug rod to rotate, and the plug rod corresponding to the rack drives the sleeve and the plug rod corresponding to the cover plate to rotate, so that the plug rod corresponding to the cover plate rotates in the direction away from the filter plate, so that the plug rod can drive the cover plate to move in the direction away from the filter plate, and in this process, the opening of the collection box is gradually exposed. When the rack moves in the direction close to the air inlet of the air inlet pipe, the rack drives the plug rod and the sleeve to rotate, thereby pushing the cover plate to move in the direction close to the filter plate, so that the cover plate blocks the collection box.

[0019] Optionally, the cover plate passes through the side wall of the collecting box away from the filter plate and is slidably inserted into the side wall. The cover plate is located between the two short side walls of the collecting box. A number of protrusions are fixedly connected to the two short side walls of the cover plate. The two short side walls of the collecting box are provided with grooves corresponding to the protrusions, and each protrusion is slidably inserted into the corresponding groove.

[0020] By adopting the above technical solution, the protrusion cooperates with the groove, so that the cover plate and the collection box are slidably matched.

[0021] Optionally, a limit spring is fixedly connected to the groove wall at one end of the groove, and the limit spring is fixed to the protrusion.

[0022] By adopting the above technical solution, the limit spring limits the cover plate, reducing the situation where the cover plate moves automatically due to the shaking of the air inlet pipe, thereby better preventing dust particles in the collection box from drifting outside the collection box.

[0023] In summary, the present application includes at least one of the following beneficial technical effects: 1. The amount of gas supplied by the flue gas absorption device to other devices for heating is maintained by setting a fan, an air inlet pipe, a rack, an active bevel gear, a driven bevel gear, a collar, a scraper and a power assembly; 2. By setting the hinged rod, power plate, matching plate, support rod and threaded rod, it is possible to provide power for the rack to move; 3. By providing a collection box, a cover plate, a sleeve and a plug-in rod, the scraped dust particles can be collected, preventing the dust particles in the collection box from being covered on the filter plate again with the air flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the fan according to an embodiment of the present application.

[0025] Figure 2 It is a cross-sectional view of the internal structure of the air inlet duct according to an embodiment of the present application.

[0026] Figure 3 It is a manifestation Figure 2 A magnified view of the structure in the middle.

[0027] Figure 4 It is a cross-sectional view of a partial structure of a power component according to an embodiment of the present application.

[0028] Figure 5 It is a cross-sectional view showing the connection relationship between the cover plate and the collection box according to an embodiment of the present application.

[0029] Explanation of the accompanying drawings: 1. air inlet pipe; 11. strip hole; 12. slide groove; 2. filter plate; 3. scraper; 4. drive assembly; 41. driven bevel gear; 42. rack; 43. driving bevel gear; 431. driving shaft; 44. collar; 5. power assembly; 51. hinged rod; 511. slider; 52. return spring; 53. mounting plate; 54. guide rod; 55. power plate; 56. matching plate; 57. support rod; 58. threaded rod; 6. collecting box; 61. groove; 7. cover plate; 71. bump; 72. limit spring; 8. sliding assembly; 81. plug-in rod; 82. sleeve; 83. mounting rod. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-5 This application is described in further detail.

[0031] The embodiment of the present application discloses a flue gas absorption device for an annealing furnace, which includes a denitration device, a waste heat recovery boiler, a fan, and a gas treatment device; wherein the air inlet of the denitration device is connected to the air outlet of the annealing furnace through a pipeline, the air outlet of the denitration device is connected to the air inlet of the flue gas pipeline of the waste heat recovery boiler through a pipeline, the air outlet of the flue gas pipeline of the waste heat recovery boiler is connected to the air inlet of the gas treatment device through a pipeline, the air outlet of the fan is connected to the air inlet of the medium pipeline of the waste heat recovery boiler through a pipeline, and the air outlet of the medium pipeline of the waste heat recovery boiler is connected to the air inlet of other heat-using devices through a pipeline.

[0032] Reference Figure 1 and Figure 2 The fan comprises an air inlet pipe 1, in which a filter plate 2 is provided. The filter plate 2 is located at one end of the air inlet of the air inlet pipe 1, the filter plate 2 is coaxial with the air inlet pipe 1, and the side wall of the filter plate 2 is fixed to the inner wall of the air inlet pipe 1. A scraper 3 is provided on one side of the filter plate 2 close to the air inlet of the air inlet pipe 1, and the length direction of the scraper 3 is arranged along the radial direction of the air inlet pipe 1; the air inlet pipe 1 is also provided with a driving component 4 which makes the scraper 3 rotatably connected with the filter plate 2 and drives the scraper 3 to rotate.

[0033] Reference Figure 2 The driving assembly 4 includes a driven bevel gear 41 whose axial direction is consistent with the axial direction of the air inlet pipe 1, and the driven bevel gear 41 is rotatably connected to the end face of the filter plate 2 close to the air inlet of the air inlet pipe 1; the driving assembly 4 also includes a rack 42 that penetrates the filter plate 2 and slides axially along the air inlet pipe 1, and an active bevel gear 43 that meshes with the driven bevel gear 41 and the rack 42 at the same time, and the axial direction of the active bevel gear 43 is arranged along the radial direction of the air inlet pipe 1, and a driving shaft 431 is penetrated and fixedly connected to the active bevel gear 43, and the active shaft 431 is coaxial with the active bevel gear 43, and both ends of the active shaft 431 are rotatably connected to the inner wall of the air inlet pipe 1.

[0034] The driving assembly 4 also includes a collar 44 coaxial with the filter plate 2, the driven bevel gear 41 and the rack 42 are both located inside the collar 44, the inner wall of the collar 44 is fixed to the side wall of the driven bevel gear 41; the scraper 3 is fixedly connected to the outer wall of the collar 44, the side wall of the scraper 3 close to the filter plate 2 is in contact with the corresponding end face of the filter plate 2.

[0035] Reference Figure 2 A power assembly 5 for providing power for the movement of the rack 42 is also provided in the air inlet pipe 1. The power assembly 5 includes a hinged rod 51 located in the air inlet pipe 1. The hinged rod 51 is located on the side of the filter plate 2 away from the scraper 3. The axial direction of the hinged rod 51 is arranged along the height direction of the fan.

[0036] Reference Figure 2 and Figure 3 A strip hole 11 corresponding to the hinge rod 51 is provided on the side wall at the top of the air inlet pipe 1, and the length direction of the strip hole 11 is arranged along the axial direction of the air inlet pipe 1. The hinge rod 51 is inserted into the strip hole 11, and a slider 511 is fixedly connected to the lower end of the hinge rod 51. A slide groove 12 corresponding to the slider 511 is provided on the inner side wall of the air inlet pipe 1, and the length direction of the slide groove 12 is arranged along the axial direction of the air inlet pipe 1, and the slider 511 is slidably inserted in the slide groove 12; the slider 511 cooperates with the slide groove 12 and the hinge rod 51 cooperates with the strip hole 11, which can guide the hinge rod 51 so that the hinge rod 51 and the air inlet pipe 1 can be slidably matched.

[0037] A return spring 52 is fixedly connected to the groove wall of the slide groove 12 at one end away from the filter plate 2, and the return spring 52 is fixedly connected to the side wall corresponding to the slider 511; a mounting plate 53 is vertically fixedly connected to the top of the outer wall of the air inlet pipe 1, and the mounting plate 53 is located on the side of the strip hole 11 away from the filter plate 2. A return spring 52 is also fixedly connected to the side wall of the mounting plate 53 close to the hinge rod 51, and the end of the return spring 52 away from the mounting plate 53 is fixedly connected to the side wall of the hinge rod 51.

[0038] A guide rod 54 is also fixedly connected to the side wall of the hinged rod 51. The axial direction of the guide rod 54 is consistent with the axial direction of the air inlet pipe 1. The guide rod 54 is inserted into the reset spring 52, and the end of the guide rod 54 away from the hinged rod 51 passes through the mounting plate 53 and is slidably connected with the mounting plate 53; the guide rod 54 and the slide groove 12 can both guide the reset spring 52 to reduce the bending of the reset spring 52 during operation.

[0039] Reference Figure 2 and Figure 4Two semicircular power plates 55 are hinged on the hinge rod 51. After the two power plates 55 are unfolded, they can cooperate to block the air inlet pipe 1. A matching plate 56 is provided between the two power plates 55. The matching plate 56 is located on the side of the hinge rod 51 away from the filter plate 2. The length of the matching plate 56 is greater than the diameter of the hinge rod 51. A support rod 57 is fixedly connected to the upper surface of the matching plate 56. The support rod 57 is inserted into the strip hole 11. A threaded rod 58 is rotatably connected to the side wall of the support rod 57 close to the hinge rod 51. The threaded rod 58 is located outside the air inlet pipe 1, and the axial direction of the threaded rod 58 is consistent with the axial direction of the air inlet pipe 1. The end of the threaded rod 58 away from the support rod 57 passes through the hinge rod 51 and is threadedly connected to the hinge rod 51.

[0040] In the initial state, the fan is working, the scraper 3 is not working, the support rod 57 and the matching plate 56 are away from the hinge rod 51, and the return spring 52 is in an incompletely compressed state. The two power plates 55 are in contact with the matching plate 56 under the action of wind force, and the sides of the two power plates 55 away from the hinge rod 51 are inclined in a direction away from each other, and air can flow into the waste heat recovery boiler through the gap between the two power plates 55 and the air inlet pipe 1.

[0041] As the fan works, the dust particles accumulated on the filter plate 2 gradually increase. When the filter plate 2 needs to be cleaned, the operator fixes the hinge rod 51 and twists the threaded rod 58. The threaded rod 58 cooperates with the hinge rod 51, so that the threaded rod 58 drives the support rod 57 and the matching plate 56 to move toward the hinge rod 51. At the same time, the matching plate 56 pushes the two power plates 55 to rotate away from each other; when the matching plate 56 contacts the hinge rod 51, the two power plates 55 are flattened to block the air inlet pipe 1.

[0042] As the fan continues to work, the fan continuously draws air on the side of the power plate 55 away from the filter plate 2 into the waste heat recovery boiler, so the air pressure on the side of the power plate 55 away from the filter plate 2 continues to decrease, causing a pressure difference on both sides of the power plate 55; the pressure difference causes the power plate 55, the matching plate 56 and the hinged rod 51 to move in the direction away from the filter plate 2.

[0043] At the same time, the hinged rod 51 also compresses the reset spring 52; the movement of the hinged rod 51 drives the rack 42 to move, and the rack 42 transmits power to the ring 44 through the active bevel gear 43 and the driven bevel gear 41 in turn, so that the ring 44 drives the scraper 3 to rotate, so that the scraper 3 can scrape off the dust particles attached to the end surface of the filter plate 2.

[0044] When the support rod 57 moves to contact the hole wall of the strip hole 11 away from the end of the filter plate 2, the driven bevel gear 41 drives the collar 44 and the scraper 3 to rotate one circle; since the scraper 3 cleans the filter plate 2, the air can better enter the air inlet pipe 1, which can provide sufficient clean air for the waste heat recovery boiler, thereby maintaining the amount of gas that the flue gas absorption device provides heat for other devices.

[0045] At this time, the operator fixes the support rod 57 and rotates the threaded rod 58 through a tool. The threaded rod 58 cooperates with the support rod 57 to move the hinge rod 51 away from the matching plate 56. At the same time, the wind force causes the two power plates 55 to rotate towards each other, thereby gradually increasing the gap between the power plate 55 and the air inlet pipe 1. Air enters the side of the power plate 55 away from the filter plate 2, and the pressure on both sides of the power plate 55 gradually approaches.

[0046] As the pressure on both sides of the power plate 55 gradually approaches, the reset spring 52 recovers its deformation and pushes the hinged rod 51, the power plate 55, the matching plate 56 and the support rod 57 to move to the initial position. The hinged rod 51 moves and drives the rack 42 to move to the initial position. The rack 42 drives the ring 44 and the scraper 3 to rotate again; when the power plate 55 and the hinged rod 51 return to the initial position, the rack 42 and the scraper 3 return to the initial position.

[0047] Reference Figure 2 In order to reduce the occurrence of scraped dust particles adhering to the filter plate 2 again, a collecting box 6 for collecting the scraped dust particles is further provided in the air inlet pipe 1. The collecting box 6 is arc-shaped and coaxial with the air inlet pipe 1; the top of the collecting box 6 is open, and the side wall of the collecting box 6 close to the filter plate 2 is in contact with the filter plate 2. A cover plate 7 for sealing the collecting box 6 is slidably inserted on the side wall of the collecting box 6 away from the filter plate 2, and the cover plate 7 penetrates the side wall of the collecting box 6 away from the filter plate 2.

[0048] Reference Figure 2 and Figure 5 , a plurality of protrusions 71 are fixedly connected to the two short side walls of the cover plate 7. In this embodiment, the number of protrusions 71 on each short side of the cover plate 7 is one; grooves 61 corresponding to the protrusions 71 are provided on the inner side walls of the two short sides of the collection box 6, and the length direction of the grooves 61 is arranged along the axial direction of the air inlet pipe 1. Each protrusion 71 is slidably inserted in the corresponding groove 61, and the grooves 61 cooperate with the protrusions 71, so that the cover plate 7 and the collection box 6 are slidably matched.

[0049] A limit spring 72 is fixedly connected to the side wall of the protrusion 71 close to the filter plate 2. The end of the limit spring 72 away from the protrusion 71 is fixedly connected to the groove wall of the groove 61 close to the filter plate 2. The limit spring 72 limits the cover plate 7 so that the cover plate 7 blocks the opening on the top of the collection box 6.

[0050] The air inlet pipe 1 is also provided with a sliding assembly 8 that drives the cover plate 7 to move and thus controls the opening and closing of the collection box 6. The sliding assembly 8 includes a plug-in rod 81 hinged on the rack 42 at one end close to the air inlet of the air inlet pipe 1, and a plug-in rod 81 is also hinged on the side wall of the cover plate 7 away from the filter plate 2; a sleeve 82 is provided between the two plug-in rods 81, and the two plug-in rods 81 are both slidably inserted in the sleeve 82.

[0051] Two mounting rods 83 are vertically fixedly connected to the end surface of the filter plate 2 close to the collecting box 6, and the sleeve 82 is located between the two mounting rods 83; the outer wall of the sleeve 82 is fixedly connected to the positions corresponding to the mounting rods 83, and each hinge shaft is hinged to the corresponding mounting rod 83; when the filter plate 2 is working normally, the cover plate 7 blocks the collecting box 6, and the sleeve 82 gradually tilts from bottom to top in the direction away from the filter plate 2.

[0052] When the rack 42 moves in the direction away from the air inlet of the air inlet duct 1, the rack 42 drives the corresponding connecting rod 81 to move, so that the connecting rod 81 connected to the rack 42 can drive the sleeve 82 and the connecting rod 81 connected to the cover 7 to rotate, and the lower ends of the sleeve 82 and the connecting rod 81 connected to the cover 7 move in the direction away from the filter plate 2, thereby driving the cover 7 and the protrusion 71 to move in the direction away from the filter plate 2; the movement of the cover 7 opens the opening on the top of the collecting box 6, and the scraped dust particles can enter the collecting box 6 for collection, and the protrusion 71 moves to stretch the limit spring 72.

[0053] When the rack 42 moves toward the direction close to the air inlet of the air inlet pipe 1, the rack 42 drives the corresponding plug-in rod 81 to move. During this process, the plug-in rod 81 connected to the cover plate 7 rotates toward the direction close to the filter plate 2, thereby pushing the cover plate 7 to move toward the direction close to the filter plate 2; at the same time, the limit spring 72 also restores its deformation and pulls the protrusion 71 and the cover plate 7 to move, so that the cover plate 7 can be better reset.

[0054] The cover plate 7 moves to gradually block the opening on the top of the collection box 6. When the rack 42 returns to its initial position, the cover plate 7 blocks the collection box 6 again, thereby reducing the dust particles in the collection box 6 from being covered on the filter plate 2 again with the airflow.

[0055] The implementation principle of the smoke absorption device of an annealing furnace in an embodiment of the present application is as follows: when the filter plate 2 needs to be cleaned, the hinged rod 51 is fixed and the threaded rod 58 is rotated, so that the matching plate 56 gradually pushes the two power plates 55 to flatten; as the fan continues to work, the pressure difference on both sides of the power plate 55 causes the power plate 55 to drive the hinged rod 51 and the rack 42 to move, and the rack 42 drives the ring 44 and the scraper 3 to rotate, and at the same time the rack 42 drives the plug-in rod 81 to rotate, thereby moving the cover plate 7, and the scraper 3 rotates to scrape the dust particles on the filter plate 2 into the collection box 6.

[0056] When the support rod 57 moves to the end of the strip hole 11 away from the air inlet of the air inlet pipe 1, the support rod 57 is fixed and the threaded rod 58 is rotated, so that the hinge rod 51 drives the power plate 55 to move in the direction away from the matching plate 56, and the wind force causes the two power plates 55 to rotate and fold; at the same time, the reset spring 52 restores the deformation and pushes the hinge rod 51, the matching plate 56, the power plate 55 and the rack 42 to move, and the rack 42 moves while driving the cover plate 7 to move through the plug-in rod 81, so that the cover plate 7 blocks the collection box 6 again.

[0057] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A smoke absorption device for an annealing furnace, comprising a fan, the fan comprising an air inlet pipe (1), a filter plate (2) being connected to the air inlet pipe (1), characterized in that: A driven bevel gear (41) is rotatably connected to the end surface of the filter plate (2) close to the air inlet of the air inlet pipe (1), and the axial direction of the driven bevel gear (41) is the same as the axial direction of the filter plate (2); The air inlet pipe (1) is also provided with a rack (42) penetrating the filter plate (2) and sliding along the axial direction of the air inlet pipe (1); the air inlet pipe (1) is also rotatably connected with a driving bevel gear (43) that meshes with the driven bevel gear (41) and the rack (42); The driven bevel gear (41) and the rack (42) are both sleeved with a collar (44), the collar (44) being axially arranged along the axial direction of the filter plate (2), and the collar (44) being fixed to the driven bevel gear (41), and a scraper (3) in contact with the filter plate (2) being fixedly connected to the outer wall of the collar (44); The air inlet pipe (1) is provided with a power assembly (5) for driving the rack (42) to move.

2. The fume absorption device for an annealing furnace according to claim 1, characterized in that: The power assembly (5) comprises a hinged rod (51) which is arranged in the air inlet pipe (1) and slides axially along the air inlet pipe (1); the hinged rod (51) is located on a side of the filter plate (2) away from the scraper plate (3); the axial direction of the hinged rod (51) is arranged along the radial direction of the air inlet pipe (1); one end of the hinged rod (51) penetrates the side wall of the air inlet pipe (1); and the rack (42) is fixed to the hinged rod (51); Two power plates (55) are hingedly connected to the hinged rod (51), a matching plate (56) is provided between the two power plates (55), and the length of the matching plate (56) is greater than the diameter of the hinged rod (51); The matching plate (56) is connected to a support rod (57) which penetrates the air inlet pipe (1) and slides axially along the air inlet pipe (1); the support rod (57) is rotatably connected to a threaded rod (58) which is arranged axially along the air inlet pipe (1) in a length direction at a position on the side wall of the support rod (57) close to the hinge rod (51) and located outside the air inlet pipe (1); the threaded rod (58) penetrates the hinge rod (51) and is threadedly connected to the hinge rod (51); The hinged rod (51) is fixedly connected to a return spring (52), and one end of the return spring (52) away from the hinged rod (51) is connected to a position on the side wall of the air inlet pipe (1) located on a side of the hinged rod (51) away from the filter plate (2).

3. The fume absorption device for an annealing furnace according to claim 2, characterized in that: The air inlet pipe (1) is provided with a strip hole (11) arranged corresponding to the hinge rod (51), the length direction of the strip hole (11) is arranged along the axial direction of the air inlet pipe (1), and the hinge rod (51) and the support rod (57) are both slidably inserted in the strip hole (11).

4. The fume absorption device for an annealing furnace according to claim 2, characterized in that: The lower end of the hinged rod (51) is fixedly connected to a slider (511); a slide groove (12) corresponding to the slider (511) is provided on the inner side wall of the air inlet pipe (1); the length direction of the slide groove (12) is arranged along the axial direction of the air inlet pipe (1); and the slider (511) is slidably inserted in the slide groove (12).

5. A fume absorption device for an annealing furnace according to any one of claims 2 to 4, characterized in that: A collecting box (6) with an open top is connected to a side of the filter plate (2) in the air inlet pipe (1) that is away from the hinge rod (51); a cover plate (7) that blocks the collecting box (6) is slidably connected to the collecting box (6); and a sliding assembly (8) that drives the cover plate (7) to move is provided in the air inlet pipe (1).

6. The fume absorption device for an annealing furnace according to claim 5, characterized in that: The sliding assembly (8) comprises a sleeve (82) hinged on an end surface of the filter plate (2) away from the hinge rod (51), a gap exists between the sleeve (82) and the filter plate (2), plug rods (81) are slidably inserted at both ends of the sleeve (82), the ends of the two plug rods (81) away from each other are both located outside the sleeve (82), one end of one of the plug rods (81) located outside the sleeve (82) is hinged to the rack (42), and the other end of the plug rod (81) located outside the sleeve (82) is hinged to the cover plate (7), and in an initial state, the upper end of the sleeve (82) is inclined in a direction away from the filter plate (2).

7. The fume absorption device for an annealing furnace according to claim 5, characterized in that: The cover plate (7) penetrates the side wall of the collection box (6) away from the filter plate (2) and is slidably plugged into the side wall. The cover plate (7) is located between the two short side walls of the collection box (6). A plurality of protrusions (71) are fixedly connected to the two short side walls of the cover plate (7). The two short side walls of the collection box (6) are provided with grooves (61) corresponding to the protrusions (71), and each protrusion (71) is slidably plugged into the corresponding groove (61).

8. The fume absorption device for an annealing furnace according to claim 7, characterized in that: A limit spring (72) is fixedly connected to a groove wall at one end of the groove (61), and the limit spring (72) is fixed to the protrusion (71).

Images