Filter device for exhaust hood

Abstract

The present invention relates to the technical field of filters, and discloses a filter device for exhaust hood, comprising a filter body installed in an external exhaust hood, a scraper, a driving assembly and an auxiliary assembly, wherein an exhaust chamber is provided in the filter body, a filter plate is fixedly provided in the exhaust chamber, a plurality of filter plates are provided, and the plurality of filter plates are evenly arranged in the filter body, a plurality of scrapers are provided, and a scraper is provided on the front side of each filter plate, a fixing frame is provided in the exhaust chamber, the scraper is slidably arranged in the fixing frame, a screw is rotatably arranged in the fixing frame, the screw is threadably connected with the scraper, a driving assembly is arranged on the outside of the fixing frame, the fixing frame is slidably arranged in the exhaust chamber, and an auxiliary assembly is arranged in the filter body.

Description

Technical Field

[0001] The invention relates to the technical field of filters, in particular to a filter device for an exhaust hood. Background Art

[0002] When conducting experiments in the laboratory, a lot of toxic and harmful gases will be produced. In order to ensure the purity of the air in the laboratory, the gases produced by the experiment need to be discharged in real time. At this time, an exhaust hood will be used. At the same time, a filter device for filtering toxic and harmful components is set inside the exhaust hood to ensure that the gas discharged from the exhaust hood meets the emission standards.

[0003] The filter device in the current exhaust hood will deposit harmful substances on the filter plate during use, and excessively thick sediment will affect the filtering efficiency of the filter plate. The common solution is to replace the filter plate, but the laboratory exhaust hood needs to be in use as much as possible. At this time, the deposition rate of the sediment on the internal filter plate will be faster, which will increase the frequency of replacing the filter plate. When replacing the filter plate, the laboratory experiment needs to be suspended. Excessive frequency of replacing the filter plate will affect the normal experimental process of the laboratory. For this reason, we propose a filter device for the exhaust hood. Summary of the invention

[0004] The object of the present invention is to provide a filter device for an exhaust hood to solve the problem in the above background technology that too much sediment affects the filtering efficiency of the filter plate.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a filter device for an exhaust hood, comprising a filter body, a scraper, a driving assembly and an auxiliary assembly installed in an external exhaust hood, an exhaust chamber is provided in the filter body, a filter plate is fixedly provided in the exhaust chamber, a plurality of filter plates are provided, and the plurality of filter plates are evenly arranged in the filter body, a plurality of scrapers are provided, and a scraper is provided on the front side of each filter plate, a fixed frame is provided in the exhaust chamber, the scraper is slidably arranged in the fixed frame, a screw is rotatably arranged in the fixed frame, the screw is threadedly connected to the scraper, a driving assembly for driving the screw to rotate is provided on the outside of the fixed frame, the fixed frame is slidably arranged in the exhaust chamber, and an auxiliary assembly for driving the fixed frame to move is provided in the filter body.

[0006] Preferably, the driving assembly includes a driving motor, an installation box is slidably provided on the outer side of the filter body, a partition is fixedly provided in the installation box, the driving motor is fixedly provided on one side of the partition, a driving shaft is rotatably provided on the side of the partition away from the driving motor, the driving shaft is rotatably connected to the inside of the installation box, the driving shaft is fixed to the output end of the driving motor, a plurality of worms are fixedly provided on the outer side of the driving shaft, a fixing frame is fixed to the outer side of the installation box, one end of the screw passes through the fixing frame and the outer side of the installation box, a worm gear is fixedly provided on the end of the screw located in the installation box, and the worm gear is meshingly connected to the worm.

[0007] Preferably, the auxiliary component includes a movable plate, a pressure sensor and a connecting piece. A sliding cavity for sliding the installation box is provided in the inner wall of the filter body. Two electric push rods are fixedly provided at the bottom of the sliding cavity. The two electric push rods are symmetrically arranged on the outside of the installation box. A through hole is provided on the outside of the installation box. The movable plate passes through the through hole. The two ends of the bottom of the movable plate are respectively fixed to the output ends of the two electric push rods. An auxiliary plate is fixedly provided inside the installation box. A rotating shaft is rotatably provided inside the auxiliary plate. A first bevel gear is fixedly provided at the bottom of the rotating shaft. An auxiliary shaft is rotatably provided inside the installation box. A second bevel gear is fixedly provided on the outside of the auxiliary shaft. The second bevel gear is meshed with the first bevel gear. A rolling gear is fixedly provided on the outside of the auxiliary shaft. External teeth meshing with the rolling gear are fixedly provided on the top of the movable plate. Two pressure sensors are provided and are symmetrically fixed on the inner wall of the exhaust chamber. The pressure sensor is electrically connected to the electric push rod. An extrusion piece for continuously extruding the pressure sensor is provided inside the scraper.

[0008] Preferably, the connecting member includes a third bevel gear, a fourth bevel gear and a fifth bevel gear, the third bevel gear and the fifth bevel gear are both arranged on the outside of the driving shaft, the fourth bevel gear is fixedly arranged at the top of the rotating shaft, the third bevel gear and the fifth bevel gear are simultaneously meshed and connected with the fourth bevel gear, the third bevel gear and the fifth bevel gear are both rotatably provided with a fixing sleeve inside, the fixing sleeve is fixed to the driving shaft, a storing groove is provided on the outside of the fixing sleeve, a stop block is rotatably provided in the storing groove by a torsion spring, the third bevel gear and the fifth bevel gear are both provided with evenly distributed ratchet grooves, and the notches of the two sets of ratchet grooves are in opposite directions.

[0009] Preferably, the extrusion piece includes a pressing block, and placement grooves are provided on both sides of the scraper. The pressing block is slidably arranged in the placement groove. A compression spring is fixedly provided on one side of the pressing block located in the placement groove, and one end of the compression spring away from the pressing block is fixed to the inside of the placement groove.

[0010] Preferably, two rolling gears are provided, and the two rolling gears are symmetrically arranged on the top of the movable plate.

[0011] Preferably, a plurality of collecting grooves are provided at the bottom of the exhaust chamber, and the collecting grooves are provided at the front side of the filter plate.

[0012] Preferably, a collection box is slidably disposed in the collection groove, the collection box passes through the outer side of the filter body, and is slidably engaged with an opening disposed on the outer side of the filter body.

[0013] Preferably, a pull ring is fixedly provided on the outer side of the installation box.

[0014] Preferably, a baffle is fixedly provided on the bottom of the installation box on a side away from the pull ring.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention arranges a plurality of filter plates in the filter body. When there is a lot of sediment on the filter plate, the driving motor drives the driving shaft to rotate, and then the worm gear and the worm drive the screw to rotate, thereby driving the scraper to slide on the filter plate to scrape off the sediment on the filter plate, thereby preventing a lot of sediment on the filter plate from affecting the filtering efficiency of the filter plate.

[0017] 2. When the scraper moves to the inner wall of the exhaust chamber of the filter body, the pressure block gradually squeezes the pressure sensor. At this time, the electrical signal is transmitted to the electric push rod, and the electric push rod operates to push the movable plate up until the outer teeth of the movable plate are engaged with the rolling gear. Driven by the drive motor, the rolling gear rolls forward on the outer teeth of the movable plate, driving the installation box and the fixing frame as a whole to move toward the filter plate, thereby bringing the scraper close to the filter plate, achieving the effect of scraping off the sediment on the filter plate layer by layer, and preventing the sediment at a certain position on the outside of the filter plate from being too thick and causing a large obstruction to the scraping process of the scraper. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a partial cross-sectional schematic diagram of the filter body of the present invention;

[0020] Figure 3 It is a partial cross-sectional schematic diagram of the installation box of the present invention;

[0021] Figure 4 This is a schematic diagram of the connection between the collection box and the filter body of the present invention;

[0022] Figure 5 This is a schematic diagram of the internal structure of the exhaust chamber of the present invention;

[0023] Figure 6 It is a partial schematic diagram of the driving assembly and auxiliary assembly of the present invention;

[0024] Figure 7 This is a schematic diagram of the structure of the rotating shaft of the present invention;

[0025] Figure 8 Schematic diagram of the internal structure of the third bevel gear and the fifth bevel gear of the present invention;

[0026] Fig. 9 It is a schematic diagram of the structure of the extruded part of the present invention;

[0027] Fig.10 It is a schematic diagram of the bottom structure of the movable plate of the present invention.

[0028] In the figure: 1, filter body; 2, exhaust chamber; 3, filter plate; 4, scraper; 5, fixing frame; 6, screw; 7, drive assembly; 8, auxiliary assembly; 9, drive motor; 10, installation box; 11, partition; 12, drive shaft; 13, worm; 14, worm gear; 15, movable plate; 16, pressure sensor; 17, connecting piece; 18, sliding chamber; 19, electric push rod; 20, through-hole; 21, auxiliary plate; 22, rotating shaft; 2 3. First bevel gear; 24. Auxiliary shaft; 25. Second bevel gear; 26. Rolling gear; 27. External tooth; 28. Extrusion piece; 29. ​​Third bevel gear; 30. Fourth bevel gear; 31. Fifth bevel gear; 32. Fixed sleeve; 33. Storage groove; 34. Stop block; 35. Ratchet groove; 36. Pressing block; 37. Placement groove; 38. Compression spring; 39. Collection groove; 40. Collection box; 41. Pull ring; 42. Baffle. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Example 1: Please refer to Figure 1 - Fig.10 The filter device for an exhaust hood shown in the figure comprises a filter body 1, a scraper 4, a driving assembly 7 and an auxiliary assembly 8 installed in an external exhaust hood. An exhaust chamber 2 is provided in the filter body 1. A filter plate 3 is fixedly provided in the exhaust chamber 2. A plurality of filter plates 3 are provided. The plurality of filter plates 3 are evenly arranged in the filter body 1. A plurality of scrapers 4 are provided. A scraper 4 is provided in front of each filter plate 3. A plurality of collecting grooves 39 for collecting sediments scraped off by the scrapers 4 are provided at the bottom of the exhaust chamber 2. The collecting grooves 39 are provided in front of the filter plate 3. Further A collecting box 40 is slidably provided in the collecting groove 39, and the sediment scraped off by the scraper 4 falls into the collecting box 40. At the same time, since the collecting box 40 passes through the outer side of the filter body 1, the scraped sediment can be taken out by pulling out the collecting box 40, so as to prevent the excessive sediment in the collecting box 40 from affecting the normal operation of the scraper 4, and the collecting box 40 is slidably engaged with the opening provided on the outer side of the filter body 1. A fixing frame 5 is provided in the exhaust chamber 2, and the scraper 4 is slidably provided in the fixing frame 5. A screw 6 is rotatably provided in the fixing frame 5, and the screw 6 is threadedly connected with the scraper 4.

[0031] A driving assembly 7 for driving the screw 6 to rotate is arranged outside the fixing frame 5, and the fixing frame 5 is slidably arranged in the exhaust chamber 2. An auxiliary assembly 8 for driving the fixing frame 5 to move is arranged in the filter body 1. In the present invention, a plurality of filter plates 3 are arranged in the filter body 1. When there are a lot of sediments on the filter plates 3, the driving assembly 7 drives the screw 6 to rotate, thereby driving the scraper 4 to slide on the filter plate 3 to scrape off the sediments on the filter plate 3. At the same time, the auxiliary structure allows the scraper 4 to scrape off the sediments layer by layer, and the obstruction during scraping is small.

[0032] In the present solution, a plurality of filter plates 3 are arranged in the exhaust chamber 2 of the filter body 1, and the particles of different particle sizes are filtered at different levels by using the multi-layer filter plates 3 to disperse the air flow pressure and reduce the impact on a single filter layer. At the same time, a scraper 4 is arranged on the front side of each filter plate 3. When there is too much sediment on the outside of the filter plate 3, the screw 6 is driven to rotate by the driving assembly 7, thereby driving all the scrapers 4 to move synchronously to scrape off the sediment on the filter plate 3. The scraped sediment falls into the collection box 40 on the front side of the filter plate 3. When there is too much sediment in the collection box 40, the collection box 40 is pulled out of the filter body 1, and then the sediment in the collection box 40 is poured out and the collection box 40 is reinserted into the collection slot 39 of the filter body 1.

[0033] Among them, see Figure 5 and Figure 6 The drive assembly 7 includes a drive motor 9, a mounting box 10 is slidably provided on the outside of the filter body 1, a partition 11 is fixedly provided in the mounting box 10, the drive motor 9 is fixedly provided on one side of the partition 11, and a drive shaft 12 is rotatably provided on the side of the partition 11 away from the drive motor 9, the drive shaft 12 is rotatably connected with the inside of the mounting box 10, the drive shaft 12 is fixed to the output end of the drive motor 9, a plurality of worms 13 are fixedly provided on the outside of the drive shaft 12, the fixing frame 5 is fixed to the outside of the mounting box 10, one end of the screw 6 passes through the fixing frame 5 and the outside of the mounting box 10, and a worm gear 14 is fixedly provided on one end of the screw 6 located in the mounting box 10, and the worm gear 14 is meshedly connected with the worm 13;

[0034] The principle of the drive assembly 7 driving the scraper 4 to move: first, the drive motor 9 drives the drive shaft 12 to rotate, thereby driving all the worms 13 on the drive shaft 12 to rotate simultaneously, and then through the meshing action of the worm 13 and the worm wheel 14, the drive shaft 12 drives all the screws 6 to rotate synchronously, thereby driving all the scrapers 4 to move on the front side of the filter plate 3 at the same time to scrape off the sediment on the filter plate 3.

[0035] Also, see Figure 1-Figure 7The auxiliary component 8 includes a movable plate 15, a pressure sensor 16 and a connecting piece 17. A sliding cavity 18 for sliding the installation box 10 is provided in the inner wall of the filter body 1. Two electric push rods 19 are fixedly provided at the bottom of the sliding cavity 18. The two electric push rods 19 are symmetrically arranged on the outside of the installation box 10. A through hole 20 is provided on the outside of the installation box 10. The movable plate 15 passes through the through hole 20. The two ends of the bottom of the movable plate 15 are respectively fixed to the output ends of the two electric push rods 19. An auxiliary plate 21 is fixed inside the installation box 10. A rotating shaft 22 is rotatably provided inside the auxiliary plate 21. The bottom end of the rotating shaft 22 is fixed. A first bevel gear 23 is fixedly provided, an auxiliary shaft 24 is rotatably provided in the mounting box 10, a second bevel gear 25 is fixedly provided on the outside of the auxiliary shaft 24, the second bevel gear 25 is meshed and connected with the first bevel gear 23, a rolling gear 26 is fixedly provided on the outside of the auxiliary shaft 24, an external tooth 27 meshed with the rolling gear 26 is fixedly provided on the top of the movable plate 15, two pressure sensors 16 are provided, and are symmetrically fixed on the inner wall of the exhaust chamber 2, the pressure sensor 16 is electrically connected to the electric push rod 19, and an extrusion piece 28 for continuously extruding the pressure sensor 16 is provided inside the scraper 4;

[0036] For further information, see Fig. 9 The extrusion member 28 includes a pressing block 36. Both sides of the scraper 4 are provided with placement grooves 37. The pressing block 36 is slidably arranged in the placement grooves 37. The pressing block 36 presses the pressure sensor 16, so that the pressure sensor 16 senses that the scraper 4 is about to move to the inner wall of the exhaust chamber 2. A compression spring 38 is fixedly arranged on one side of the pressing block 36 located in the placement groove 37. The end of the compression spring 38 away from the pressing block 36 is fixed to the inside of the placement groove 37.

[0037] The principle of the auxiliary component 8 driving the scraper 4 to scrape off the sediment on the front side of the filter plate 3 layer by layer is as follows: when the driving motor 9 drives the driving shaft 12 to rotate, the driving shaft 12 drives the rotating shaft 22 to rotate through the connecting piece 17, thereby driving the auxiliary shaft 24 to rotate through the meshing of the first bevel gear 23 and the second bevel gear 25 at the bottom of the rotating shaft 22, thereby driving the rolling gear 26 on the auxiliary shaft 24 to rotate; when the scraper 4 moves to the inner wall of the exhaust chamber 2, the pressure block 36 first contacts the pressure sensor 16, at which time the pressure sensor 16 senses the signal and drives the electric push rod 19 to operate, and the electric push rod 19 pushes the movable plate 15 to rise until the outer teeth 27 on the movable plate 15 mesh with the rolling gear 26, at which time the rolling gear 26 no longer idles, but rolls forward on the outer teeth 27, Then, the installation box 10, the fixing frame 5 and the scraper 4 are driven as a whole to move forward toward the filter plate 3. At this time, the driving motor 9 reverses, driving the scraper 4 to leave the inner wall of the exhaust chamber 2. At this time, the pressure block 36 no longer squeezes the pressure sensor 16. The pressure sensor 16 releases a signal to drive the electric push rod 19 to retreat and move the movable plate 15 downward. At this time, the rolling gear 26 is in an idling state again, and the scraper 4 is driven by the reversed screw 6 to scrape off the sediment on the outside of the filter plate 3 again. Repeat the above steps until the scraper 4 is against the filter plate 3 to completely scrape off the sediment on the outside of the filter plate 3. The scraper 4 gradually approaches the filter plate 3. The method of scraping off the sediment on the front side of the filter plate 3 layer by layer can prevent the sediment at a certain position on the outside of the filter plate 3 from being too thick and causing a large obstruction to the scraping process of the scraper 4.

[0038] It should also be noted that, see Figure 7 and Figure 8 The connecting member 17 includes a third bevel gear 29, a fourth bevel gear 30 and a fifth bevel gear 31. The third bevel gear 29 and the fifth bevel gear 31 are both arranged on the outside of the driving shaft 12. The fourth bevel gear 30 is fixedly arranged on the top of the rotating shaft 22. The third bevel gear 29 and the fifth bevel gear 31 are meshed and connected with the fourth bevel gear 30 at the same time. The third bevel gear 29 and the fifth bevel gear 31 are both rotatably provided with a fixing sleeve 32 inside. The fixing sleeve 32 is fixed to the driving shaft 12. A receiving groove 33 is provided on the outside of the fixing sleeve 32. A stop block 34 is rotatably provided in the receiving groove 33 through a torsion spring. The third bevel gear 29 and the fifth bevel gear 31 are both provided with evenly distributed ratchet grooves 35 inside, and the notches of the two groups of ratchet grooves 35 are in opposite directions.

[0039] The principle of the connecting member 17 ensuring that the rotating shaft 22 rotates in one direction when the driving motor 9 rotates forward or reversely is: since the third bevel gear 29 and the fifth bevel gear 31 are meshed with the fourth bevel gear 30 at the same time, when the driving shaft 12 rotates forward with the driving motor 9, the stopper 34 in the third bevel gear 29 is stuck in the ratchet groove 35 of the third bevel gear 29 under the action of the torsion spring, so that the third bevel gear 29 rotates together with the driving shaft 12, and the third bevel gear 29 drives the rotating shaft 22 to rotate by meshing with the fourth bevel gear 30, and at this time, the ratchet groove 35 in the fifth bevel gear 31 will not block the stopper 34 inside it, and the fifth bevel gear 31 will not rotate with the driving shaft 1 2 moves together; when the driving shaft 12 is reversed along with the driving motor 9, the ratchet groove 35 in the third bevel gear 29 will not block the stopper 34 inside thereof, and the stopper 34 in the fifth bevel gear 31 is stuck in the ratchet groove 35 of the fifth bevel gear 31. At this time, the third bevel gear 29 does not move synchronously with the driving shaft 12, and the fifth bevel gear 31 rotates along with the driving shaft 12. The fifth bevel gear 31 drives the rotating shaft 22 to rotate by meshing with the fourth bevel gear 30. Since the fifth bevel gear 31 and the third bevel gear 29 are symmetrically arranged on the outside of the fourth bevel gear 30, the rotation direction of the rotating shaft 22 is consistent with the rotation direction of the rotating shaft 22 when the driving motor rotates forward.

[0040] In this solution, the scraper 4 scrapes off the sediment on the outside of the filter plate 3 in the following steps:

[0041] First, the driving motor 9 is driven to rotate forward to drive the driving shaft 12, and the driving shaft 12 drives the worm wheel 14 at the end of the screw 6 to rotate through the worm 13, thereby driving all the screws 6 to rotate synchronously, and then driving the scraper 4 on the screw 6 to move synchronously to scrape off the sediment on the front surface of the filter plate 3. During the forward rotation of the driving motor 9, the driving shaft 12 drives the third bevel gear 29 to rotate, and the third bevel gear 29 drives the rotating shaft 22 to rotate by meshing with the fourth bevel gear 30, and then drives the auxiliary shaft 24 to rotate by meshing the first bevel gear 23 and the second bevel gear 25 at the bottom of the rotating shaft 22, thereby driving the rolling gear 26 on the auxiliary shaft 24 to rotate idly;

[0042] When the scraper 4 moves to the inner wall of the exhaust chamber 2 as the screw 6 rotates, the pressure block 36 first contacts the pressure sensor 16 on the inner wall. At this time, the pressure sensor 16 transmits the signal to the electric push rod 19, and the electric push rod 19 operates to lift the movable plate 15 to the position in contact with the rolling gear 26. At this time, the rolling gear 26 meshes with the outer teeth 27 on the movable plate 15. The rolling gear 26 no longer idles, but rolls on the movable plate 15, driving the installation box 10 and the fixed frame 5 to move together. , thereby driving the scraper 4 in the fixing frame 5 to move toward the front side of the filter plate 3, gradually approaching the front side surface of the filter plate 3, at this time, the driving motor 9 reverses, driving the scraper 4 to leave the inner wall of the exhaust chamber 2, at this time, the pressure block 36 no longer squeezes the pressure sensor 16, the pressure sensor 16 releases a signal, the electric push rod 19 retracts, driving the movable plate 15 to move downward and no longer contact the rolling gear 26, the rolling gear 26 returns to the idling state, at this time, the scraper 4 scrapes off the second layer of sediment on the outside of the filter plate 3, until the scraper 4 moves to the inner wall on the other side of the exhaust chamber 2;

[0043] When the scraper 4 moves to the inner wall on the other side of the exhaust chamber 2 with the reverse rotation of the driving motor 9, the pressure block 36 abuts against the pressure sensor 16 on the inner wall there, thereby driving the electric push rod 19 to operate again, and lifting the movable plate 15 to the position in contact with the rolling gear 26. At this time, the reverse rotation of the driving motor 9 drives the driving shaft 12 to reverse, and the driving shaft 12 no longer drives the third bevel gear 29 to rotate, but drives the fifth bevel gear 31 to rotate, and drives the rotating shaft 22 to rotate through the meshing of the fifth bevel gear 31 and the fourth bevel gear 30. Since the fifth bevel gear 31 and the third bevel gear 29 are symmetrically arranged on the outside of the fourth bevel gear 30, the rotation direction of the rotating shaft 22 is consistent with the rotation direction of the rotating shaft 22 when the driving motor rotates forward, and the rotation direction of the rolling gear 26 is also consistent with the rotation direction of the rotating shaft 22 when the driving motor rotates forward. Therefore, at this time, the rolling gear 26 continues to move forward on the movable plate 15, driving the scraper 4 to move toward the front side of the filter plate 3 again, so that the scraper 4 is further close to the front side surface of the filter plate 3;

[0044] Repeat the above steps, use the scraper 4 to scrape off the sediment on the front side of the filter plate 3 layer by layer, and scrape the sediment on the outside of the filter plate 3 into the collection box 40 on the front side of the filter plate 3. When there are too many sediments in the collection box 40, pull the collection box 40 out of the filter body 1, pour out the sediment in the collection box 40, and then reinsert the collection box 40 into the collection slot 39 of the filter body 1.

[0045] After completing the entire scraping step, the scraper 4 no longer performs the scraping movement, and the movable plate 15 is lifted by the electric push rod 19 to the middle of the through-opening 20. At this time, the movable plate 15 is not in contact with the rolling gear 26. Then the installation box 10 is manually pulled back to the initial position, and the electric push rod 19 retracts to clamp the movable plate 15 in the through-opening 20 so that the scraping operation can be performed next time when the sediment on the filter plate 3 is thicker.

[0046] It is worth noting that Fig.10 As shown, the bottom of the movable plate 15 is engaged with the inner bottom of the through-opening 20 through evenly arranged anti-slip grooves, and the movable plate 15 is retracted at the inner bottom of the through-opening 20 through the electric push rod 19, which can prevent the installation box 10 and the fixing frame 5 from accidentally moving as a whole when the scraper 4 is scraping on the filter plate 3.

[0047] Example 2: Please refer to Figure 6 This embodiment further explains the first embodiment, and the difference lies in the optimization of the rolling gear 26 on the auxiliary shaft 24.

[0048] Specifically, there are two rolling gears 26, and the two rolling gears 26 are symmetrically arranged on the top of the movable plate 15;

[0049] In this solution, two symmetrically arranged rolling gears 26 are arranged on the top of the movable plate 15 , which can ensure that the rolling gears 26 are straight and stable when moving on the movable plate 15 .

[0050] Example 3: Please refer to Figure 1 and Figure 3 This embodiment further illustrates other embodiments, and the difference lies in the optimization of the installation box 10.

[0051] Specifically, a pull ring 41 is fixedly provided on the outside of the installation box 10, and a baffle 42 is fixedly provided on the bottom of the installation box 10 away from the pull ring 41. After the scraper 4 completes a whole set of scraping operations, the personnel pulls the installation box 10 through the pull ring 41 to move the scraper 4 away from the surface of the filter plate 3 until the baffle 42 abuts against the outside of the filter body 1 to limit the installation box 10 from continuing to move. At this time, the device as a whole returns to the initial state, waiting for another scraping operation.

[0052] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A filter device for an exhaust hood, comprising a filter body (1) installed in an external exhaust hood, an exhaust cavity (2) being provided in the filter body (1), and a filter plate (3) being fixedly provided in the exhaust cavity (2); It is characterized in that Also includes: A scraper (4), wherein a plurality of filter plates (3) are provided, and the plurality of filter plates (3) are evenly arranged in the filter body (1); a plurality of scrapers (4) are provided, and a scraper (4) is provided on the front side of each filter plate (3); a fixing frame (5) is provided in the exhaust cavity (2), and the scraper (4) is slidably arranged in the fixing frame (5); a screw (6) is rotatably arranged in the fixing frame (5), and the screw (6) is threadedly connected to the scraper (4); A driving assembly (7), the driving assembly (7) being used for driving the screw rod (6) to rotate, and being arranged on the outside of the fixing frame (5); An auxiliary component (8), wherein the fixing frame (5) is slidably disposed in the exhaust chamber (2), and the auxiliary component (8) for driving the fixing frame (5) to move is disposed in the filter body (1); the auxiliary component (8) comprises a movable plate (15), a pressure sensor (16) and a connecting piece (17); a mounting box (10) is slidably disposed on the outer side of the filter body (1); a sliding cavity (18) for sliding the mounting box (10) is disposed in the inner wall of the filter body (1); two electric push rods (19) are fixedly disposed at the bottom of the sliding cavity (18); the two electric push rods (19) are symmetrically disposed on the outer side of the mounting box (10); and a through opening (20) is disposed on the outer side of the mounting box (10). The movable plate (15) passes through the through-hole (20), the two ends of the bottom of the movable plate (15) are respectively fixed to the output ends of the two electric push rods (19), an auxiliary shaft (24) is rotatably provided in the installation box (10), a rolling gear (26) is fixedly provided on the outside of the auxiliary shaft (24), an external tooth (27) meshing with the rolling gear (26) is fixedly provided on the top of the movable plate (15), two pressure sensors (16) are provided and symmetrically fixed on the inner wall of the exhaust chamber (2), the pressure sensors (16) are electrically connected to the electric push rods (19), and an extrusion member (28) for continuously extruding the pressure sensor (16) is provided inside the scraper (4).

2. A filter device for an exhaust hood according to claim 1, characterized in that: The drive assembly (7) comprises a drive motor (9), a partition (11) is fixedly provided in the installation box (10), the drive motor (9) is fixedly provided on one side of the partition (11), a drive shaft (12) is rotatably provided on the side of the partition (11) away from the drive motor (9), the drive shaft (12) is rotatably connected to the inside of the installation box (10), the drive shaft (12) is fixed to the output end of the drive motor (9), a plurality of worms (13) are fixedly provided on the outside of the drive shaft (12), the fixed frame (5) is fixed to the outside of the installation box (10), one end of the screw rod (6) passes through the fixed frame (5) and the outside of the installation box (10), one end of the screw rod (6) located in the installation box (10) is fixedly provided with a worm wheel (14), and the worm wheel (14) is meshingly connected with the worm rod (13).

3. A filter device for an exhaust hood according to claim 2, characterized in that: An auxiliary plate (21) is fixedly provided inside the installation box (10), a rotating shaft (22) is rotatably provided inside the auxiliary plate (21), a first bevel gear (23) is fixedly provided at the bottom end of the rotating shaft (22), a second bevel gear (25) is fixedly provided outside the auxiliary shaft (24), and the second bevel gear (25) is meshingly connected with the first bevel gear (23).

4. A filter device for an exhaust hood according to claim 3, characterized in that: The connecting member (17) comprises a third bevel gear (29), a fourth bevel gear (30) and a fifth bevel gear (31); the third bevel gear (29) and the fifth bevel gear (31) are both arranged on the outside of the driving shaft (12); the fourth bevel gear (30) is fixedly arranged on the top end of the rotating shaft (22); the third bevel gear (29) and the fifth bevel gear (31) are simultaneously meshed and connected with the fourth bevel gear (30); the third bevel gear (29) and the fifth bevel gear (31) are meshed and connected with the fourth bevel gear (30); A fixing sleeve (32) is rotatably provided inside the gear (29) and the fifth bevel gear (31), the fixing sleeve (32) is fixed to the drive shaft (12), a receiving groove (33) is provided outside the fixing sleeve (32), a stopper (34) is rotatably provided in the receiving groove (33) via a torsion spring, and evenly distributed ratchet grooves (35) are provided inside the third bevel gear (29) and the fifth bevel gear (31), and the notches of the two groups of ratchet grooves (35) are in opposite directions.

5. A filter device for an exhaust hood according to claim 3, characterized in that: The extrusion member (28) comprises a pressing block (36). Both sides of the scraper (4) are provided with placement grooves (37). The pressing block (36) is slidably arranged in the placement groove (37). A compression spring (38) is fixedly arranged on one side of the pressing block (36) located in the placement groove (37). An end of the compression spring (38) away from the pressing block (36) is fixed to the inside of the placement groove (37).

6. A filter device for an exhaust hood according to claim 3, characterized in that: Two rolling gears (26) are provided, and the two rolling gears (26) are symmetrically arranged on the top of the movable plate (15).

7. A filter device for an exhaust hood according to claim 1, characterized in that: A plurality of collecting grooves (39) are provided at the bottom of the exhaust cavity (2), and the collecting grooves (39) are provided on the front side of the filter plate (3).

8. A filter device for an exhaust hood according to claim 7, characterized in that: A collection box (40) is slidably disposed in the collection groove (39); the collection box (40) penetrates the outside of the filter body (1) and is slidably engaged with an opening disposed on the outside of the filter body (1).

9. A filter device for an exhaust hood according to claim 2, characterized in that: A pull ring (41) is fixedly provided on the outer side of the installation box (10).

10. A filter device for an exhaust hood according to claim 9, characterized in that: A baffle (42) is fixedly provided on the bottom of the installation box (10) on a side away from the pull ring (41).

Images