Filter unit for a flat bag dust collector

Abstract

The application discloses a kind of flat bag dust collector filter units, the filter unit includes in structure: support frame, multiple flat bags of vertical form is fixedly arranged on support frame, bag cage framework for being arranged in flat bag and being used to support, mechanical ash cleaning device is arranged outside each flat bag and provides the commutation auxiliary mechanism of work commutation of mechanical ash cleaning device.Mechanical ash cleaning device is directly mechanically scraped to filter material surface by scraping ash strip, and back and forth movement is realized by being threadedly connected on guide frame to clean and cover.The reversing movement of scraping ash device can be driven by the shift lever in commutation auxiliary mechanism, and the cooperation of mechanical ash cleaning device and commutation auxiliary mechanism realizes the continuous, comprehensive mechanical cleaning of filter material surface in flat bag.Compared with prior art, the flat bag dust removal filter unit combines mechanical direct scraping and reversing movement mode, breaks through the limitation of traditional cleaning mechanism relying on pulse airflow impact, and mechanically removes dust adhered to filter material more targeted.

Description

Technical Field

[0001] This invention relates to a filter unit for a flat bag dust collector, belonging to the field of industrial dust and gas treatment and purification technology. Specifically, it relates to flat filter bag dust collection technology for filtering dust-collecting airflow, and to an improvement in the online automatic mechanical cleaning technology of the fiber structure filter media in a flat bag dust collector. This improves the automatic self-cleaning function of the flat bag dust collector filter media, solving technical problems such as the difficulty in removing dust adhering to the filter media during use. It is an online automatic cleaning technology that satisfies the requirements of enhanced mechanical cleaning of the filter media in the filtration device, achieving continuous and efficient dust removal and filtration. Background Technology

[0002] Currently, bag filters are frequently used in industrial production environments that generate significant dust pollution to treat and purify dust-laden gases. The commonly used filter material is a flat filter bag, which is widely used due to its large filtration area and high gas flow rate.

[0003] However, after a period of use, due to the prolonged impact of dust-laden airflow, a large amount of dust will accumulate and adhere to the surface of the filter media, hindering gas passage and reducing the filtration effect, eventually leading to complete clogging and failure of the filter media. Therefore, it is necessary to remove the dust adhering to the surface of the filter media.

[0004] The common technique for cleaning flat bag filter media is intermittent pulse jet cleaning. Chinese utility model patent CN215742417U discloses a typical pulse-jet flat bag dust collector, which filters dust-laden air by incorporating a filtration device, a maintenance device, and a dust removal device. To improve the device's sealing and divide different airflow zones, partitions are added inside the casing to form a filter chamber, an inlet chamber, and an outlet chamber. This structure can improve the dust removal effect to some extent; however, relying solely on intermittent airflow impact for cleaning still results in poor removal of dust adhering to the filter media surface.

[0005] In addition, some technologies employ structures that link with the filter bag frame to expand the cleaning range, but due to limitations in movement patterns, the cleaning coverage of the filter bag surface remains relatively limited. Existing technologies almost entirely lack operating methods that allow for alternating cleaning of the filter media surface. Summary of the Invention

[0006] In view of this, the present invention provides a filter unit for a flat bag dust collector. By innovatively setting a device that can mechanically clean the filter media and realize its reversal, the filter media is thoroughly and efficiently cleaned, which greatly improves the service life and dust removal effect of the flat bag dust collector.

[0007] The technical solution of this invention is implemented as follows: a flat bag dust collector filter unit includes: a support frame, a plurality of flat bags fixedly disposed on the support frame, a bag cage skeleton disposed inside the flat bags for support, a mechanical cleaning device disposed outside each flat bag for scraping the surface of the filter material, and a reversing auxiliary mechanism for providing working reversal for the mechanical cleaning device.

[0008] Preferably, the support frame is provided with support beams below it for supporting the bag cage frame. The support beams are used to fix and support the bag cage frame, and this structure can ensure the stability of the filter bag structure.

[0009] Preferably, the mechanical cleaning device includes: connecting rods vertically arranged between the support beams and rotatably connected to the support beams; a guide frame erected between adjacent connecting rods; a main body sleeved on the guide frame and threadedly connected to the connecting rods; reversing driven rods fixed at both ends of the main body; and scraper strips disposed on the main body. This structure enables the working movement of the main body of the scraper device to mechanically clean the filter media.

[0010] Preferably, the mechanical dust removal device further includes: a transmission wheel fixedly disposed on the outside of the support beam, the transmission wheel being fixedly connected to the connecting rod; and a transmission belt disposed between the transmission wheels. This transmission structure enables efficient power transmission.

[0011] Preferably, the mechanical dust removal device is further provided with a clamping transmission wheel to increase the transmission force. The clamping transmission wheel can prevent slippage in power transmission.

[0012] Preferably, the repositioning auxiliary mechanism includes: a mechanism body fixedly mounted above the support beam, and a lever with one end rotatably connected to the mechanism body and the other end rotatably connected to the reversing passive rod of the main body. The lever structure can drive the dust scraping device to reverse direction, expanding the cleaning range.

[0013] Preferably, the shifting auxiliary mechanism further includes: a slider slidably disposed within the mechanism body, the slider being hinged to the lever; and a tension spring for driving the slider to slide. The slider and tension spring structure enables the lever to automatically reset.

[0014] Preferably, the repositioning auxiliary mechanism further includes a trigger element fixedly mounted on the connecting rod, the trigger element being rotatably connected to the lever. The trigger element drives the lever to change direction.

[0015] Preferably, the repositioning auxiliary mechanism further includes a driving component slidably mounted on the connecting rod, the driving component abutting against the trigger component. The driving component is configured to transmit drive.

[0016] Preferably, the trigger includes: a connecting part coaxially connected to the lever; and a push rod fixedly disposed on the connecting part and perpendicular to the connecting part. The structure of the connecting part and the push rod facilitates force transmission to drive the lever to change direction.

[0017] Preferably, the driving component includes: a guide groove disposed on the connecting rod; a transmission component slidably disposed within the guide groove and abutting against the trigger component; an abutting portion fixed to one end of the transmission component; and an abutting end fixed to the other end of the transmission component. The matching connection of each component can effectively realize the driving reversal of the lever.

[0018] Preferably, the mechanical dust removal device and the repositioning auxiliary mechanism work together to achieve alternating mechanical dust scraping of both sides of the flat bag. The coordinated operation of the mechanical dust removal device and the repositioning auxiliary mechanism ensures thorough cleaning of the filter media.

[0019] The embodiments of the present invention have the following advantages due to the adoption of the above technical solutions:

[0020] The support frame, multiple flat bags, and bag cage skeleton of this flat bag dust collector filter unit form the overall structural framework of the filter unit, which is conducive to achieving stable filtration. The mechanical cleaning device located on the outside of the flat bags directly cleans the filter media through the movement of the scraper. The transmission structure design ensures effective power transmission, realizing the scraping function of the filter media. The reversing auxiliary mechanism expands the cleaning range by driving the reversing movement of the scraper, while occupying very little space. The design of each reset structure ensures reliable operation. With the cooperation of the mechanical cleaning device and the reversing auxiliary mechanism, a more comprehensive and efficient cleaning of the filter media surface is achieved. Compared with existing technologies, this flat bag dust collector filter unit, combining direct mechanical scraping and reversing movement, breaks through the limitations of the traditional cleaning mechanism relying on pulsed airflow impact. It performs more targeted mechanical removal of dust adhering to the filter media, greatly improving the cleaning intensity and range, and extending the service life of the filter media. This structural innovation solves the technical problem of difficult dust removal from the filter media of flat bag dust collectors, enabling continuous and efficient filtration and demonstrating good practicality. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a structural diagram of the present invention, which hides part of the flat bag;

[0023] Figure 2 for Figure 1 Enlarged view of the local structure at point A;

[0024] Figure 3 A schematic diagram of the flat bag and bag cage frame 12;

[0025] Figure 4 This is a partial structural diagram of the present invention from another perspective;

[0026] Figure 5 for Figure 4 Enlarged view of the local structure at point B;

[0027] Figure 6 A schematic diagram of the structure of the dust removal actuator;

[0028] Figure 7 A structural diagram of the combination of supporting beam, transmission wheel, transmission belt, and clamping transmission wheel;

[0029] Figure 8 This is a schematic diagram illustrating the operation of the positioning auxiliary mechanism.

[0030] Figure 9 This is a schematic diagram of the transposition auxiliary mechanism;

[0031] Figure 10 This is a partial structural diagram of the present invention that hides components such as the flat bag from another angle;

[0032] Figure 11 for Figure 10 Enlarged view of the local structure at point C;

[0033] Figure 12 This is a schematic diagram of the transmission component.

[0034] Reference numerals: 1. Support frame; 11. Flat bag; 12. Bag cage frame; 13. Support beam; 2. Mechanical dust removal device; 21. Connecting rod; 22. Dust removal actuator; 22. Guide frame; 221. Main body; 224. Thread; 225. Connecting rod; 226. Dust scraper; 227. Transmission wheel; 16. Transmission belt; 17. Pressing transmission wheel; 18. Positioning auxiliary mechanism; 31. Mechanism body; 32. Lever; 33. Slider; 34. Swing arm; 35. Tension spring; 36. Trigger; 37. Connecting part; 371. Push rod; 372. Drive component; 38. Guide slide groove; 381. Transmission component; 382. Abutment part; 383. Abutment end; 384. First sliding member 1a; Second sliding member 2a; Angled arm 3a. Detailed Implementation

[0035] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0036] It is important to note that terms such as "first," "second," "symmetric," and "array" are used only to distinguish between descriptive and positional descriptions and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified with terms such as "first" or "symmetric" may explicitly or implicitly include one or more of that feature; similarly, when the quantity of certain features is not limited by words such as "two" or "three," it should be noted that such features also explicitly or implicitly include one or more features.

[0037] The following is in conjunction with the appendix Figure 1-12 The embodiments of the present invention will be described in detail below.

[0038] Example 1:

[0039] A filter unit for a flat bag dust collector, installed in a flat bag dust collector for dust treatment in industry, includes: a support frame 1 as the main support, a plurality of flat bags 11 fixedly installed on the support frame 1, and a bag cage frame 12 installed inside the flat bags 11 for supporting the flat bags, a mechanical cleaning device 2 provided on the outside of each flat bag 11 for scraping off the adhering dust, and a repositioning auxiliary mechanism 3 for assisting the mechanical cleaning device 2 in reversing so as to alternately scrape the two sides of the flat bag.

[0040] After installation, the opening of each flat bag 11 faces to the side and is placed upright. The side of the bag cage frame 12 with the opening is fixedly connected to the support frame 1.

[0041] The support frame 1 includes at least one support beam 13 for supporting the bag cage skeleton 12, located below each of the sides of the flat bag 11 near the opening and the side near the tail.

[0042] The mechanical dust removal device 2 provided for each flat bag 11 specifically includes:

[0043] (1) Multiple threaded connecting rods 21 are vertically arranged between the upper and lower support beams 13 of the support frame 1. Each connecting rod 21 is located in the middle of the first and last ends of two adjacent flat bags 11. A connecting rod 21 is also arranged on the outer side of each outermost flat bag 11 at the position corresponding to the connecting rod 21. That is, each flat bag 11 has connecting rods 21 with the same spacing on both sides. The height of the connecting rod 21 is higher than the flat bag 11 by a section. The part that is higher is a smooth rod with a slightly smaller diameter. The space above is used to arrange the transposition auxiliary mechanism 3.

[0044] (2) A dust removal actuator 22 is set at both ends of each flat bag 11 and between the connecting rods 21 on both sides. It includes: a guide frame 221 erected between two adjacent connecting rods 21. The guide frame 221 consists of two round rods 222 fixed at the bottom to the support beam 13 and an arc rod 223 connecting the two round rods 222 at the top. The diameter of the arc rod 223 is smaller than that of the round rods 222. Two main body parts 224 are respectively movably sleeved on the two guide frames 221 on the same side of the same flat bag 11. The diameter of the arc rod 223 needs to allow the main body parts 224 to pass smoothly. The main body parts 224 have threads 225 on the same side that engage with the connecting rods. The middle of the two main body parts 224 is fixed by a connecting rod 226, and a reversing passive rod 228 extends outward from both ends. A scraper strip 227 is set on the side opposite to the thread 225. The scraper strip 227 is in a certain pressing state relative to the filter material surface. The scraper strip 227 can be made of steel wire or steel wire rope stretched together. The scraper strip is made of steel wire, which makes it both wear-resistant and effective at scraping, while taking up very little space.

[0045] The above structure enables each flat bag to have two main parts at both ends that can slide back and forth along the guide frame. After the two parts are connected, the scraper strip can thoroughly scrape and clean the surface of the filter material when sliding back and forth.

[0046] (3) Regarding the setting of the power transmission part of the mechanical dust removal device 2: Each connecting rod passes through the support beam 13 and is fixed to the transmission wheel 16 at the same height after passing through the support beam 13. Each transmission wheel 16 is connected by the transmission belt 17, and the power source is set to the outside of the dust collector through the bevel gear set and the transmission shaft, realizing the independent transmission of the mechanical dust removal devices between layers.

[0047] In addition, a pressing drive wheel 18 is provided between two adjacent drive wheels 16 to tension the drive belt 17 into the wheel groove. This can increase the contact area of ​​the drive belt and the wheel, improve the driving friction, ensure reliable and effective power transmission, and prevent the pulley from slipping.

[0048] The purpose of the switching auxiliary mechanism 3 is to enable a set of cleaning actuators 22 in the mechanical cleaning device 2 to alternately serve the two sides of a flat bag 11, which includes:

[0049] (1) The mechanism body 31 is fixedly installed above the support beam 13 or fixed in other ways, located directly above each arc rod 223;

[0050] (2) One end is rotatably connected to the mechanism body 31, and the other end is a freely hanging lever 32;

[0051] (3) The long slot 33 provided on the mechanism body 31 is located below the hinge point with the lever 32;

[0052] (4) The slider 34 is set in the long groove 33 and can only move in the direction of upward extension from the middle of the groove;

[0053] (5) The swing arm 35 is hinged at one end to the end face of the slider 34 and at the other end to the middle section of the lever 32;

[0054] (6) Tension spring 36, one end of which is fixed to the lower edge of the long groove 33, and the other end is connected to the slider 34.

[0055] After the lever 32, slider 34, swing arm 35, and tension spring 36 are assembled inside the mechanism body 31, the lever 32 is tilted at a certain angle and stays on one side, while the slider 34 is located at the lowest end of its range of motion under the action of the tension spring 36. When the lever 32 rotates to the other side under the action of an external force, the swing arm 35 drives the slider 34 to move upward against the tension of the tension spring 36; when the lever 32 rotates to the vertical position, the slider 34 moves to the highest point, stretching the tension spring 36 to its maximum extent; when it continues to rotate past the vertical position, the tension spring 36 quickly recovers from the stretched state, driving the lever 32 and swing arm 35 to rotate to the same angle on the other side.

[0056] The working principle of the transposition mechanism is as follows: Figure 5 As shown, the back-and-forth swing of the lever 32 drives the dust removal actuator 22 to work alternately between the two sides, achieving full coverage of mechanical dust removal.

[0057] The transposition auxiliary mechanism 3 also includes:

[0058] (1) Trigger 37: It consists of a connecting part 371 that can be coaxially connected with the lever 32 and a push rod 372 fixed on the connecting part 371, with its axis perpendicular to the connecting part 371 and extending outward at both ends with equal lengths. After installation, when the lever 32 is vertical, the push rod 372 is horizontal, and when the lever 32 is tilted and stays on one side, the push rod 372 is tilted.

[0059] (2) Driving element 38: used to drive the action of trigger element 37.

[0060] During operation, applying force to the lower side of the push rod 372 can cause the lever 32 to rotate to the other side, at which point the tilt direction of the push rod 372 changes accordingly; applying force to the new lower side of the push rod 372 again can cause the lever 32 to turn again, and so on, changing the lower side of the push rod 372 repeatedly to realize the repositioning of the lever 32 and the dust removal actuator 22.

[0061] The shifting auxiliary mechanism 3, through the cooperation of the aforementioned components, enables the cleaning actuator 22 in the mechanical cleaning device 2 to work alternately on both sides of the flat bag 11, performing comprehensive scraping and cleaning of the filter material. Its schematic structure can be found in the following diagram. Figure 8 , Figure 9 .

[0062] The driving component 38 is a part used to push the trigger 37 to drive the lever 32 to rotate and change direction, and it includes:

[0063] (1) A guide groove 381 is provided on each connecting rod 21 smooth rod;

[0064] (2) A set of motion transmission components is arranged for each arc rod 223. Specifically, a first sliding member 1a is set in the high guide groove 381 of the connecting rod 21 on one side of an arc rod 223, and a corresponding second sliding member 2a is set in the low guide groove 381 of the connecting rod 21 on the other side of the same arc rod 223. The two sliding members are connected as one unit by a diagonal arm 3a and arranged in the same way to form a set of independent X-shaped transmission components 382 that transmit motion in opposite directions.

[0065] (3) Each first sliding member 1a extends an abutting part 383 from its upper end toward the center of the thickness of the flat bag. The abutting part 383 is in direct contact with the push rod 372. When the first sliding member 1a slides, it pushes the push rod 372 to drive the lever 32 to rotate and change direction.

[0066] (4) Each second sliding member 2a extends downward into the guide groove 381 and extends a contact end 384. When not in operation, the contact end 384 abuts against the end of the connecting rod thread. This is to avoid collision between the main body 224 and the second sliding member 2a when the dust removal actuator 22 reverses direction.

[0067] During overall operation, the dust removal actuator 22 is initially positioned at a low position on one side of the flat bag. External power input to the mechanical dust removal device 2 causes the connecting rod to rotate, moving the main body 224 upwards. The dust removal actuator 22 scrapes dust from the flat bag on this side. As the connecting rod rotates, the main body 224 gradually moves to the end of the thread. At this point, the thread 225 contacts the abutment end 384 and pushes it upwards. The abutment end 384 pushes the second sliding member 2a upwards. This movement causes the integral opposing abutment parts 383 to contact the pushing part. Rod 372 contacts and drives lever 32 to achieve reversal. During the reversal, the main body 224 is also located at the arc rod 223. Lever 32 then moves the reversing passive rod 228 during the reversal. The reversing passive rod 228 drives the dust removal actuator 22 to complete the reversal. After the reversal is completed, the external power switches to reverse rotation. Under its own weight, the thread 225 of the main body 224 engages with the thread of the connecting rod and moves downward. The dust removal actuator 22 is driven downward to continue mechanically scraping dust from the other side of the flat bag.

[0068] Example 2:

[0069] The filter units of this flat bag dust collector are used for the treatment of industrial exhaust gas. Specifically, multiple filter units can be connected in parallel to form an industrial exhaust gas treatment device. The device has a pretreatment unit at the inlet to remove larger particles from the exhaust gas, and an integrated dust collection unit at the outlet to recover the treated dust.

[0070] In operation, dust-laden exhaust gas is introduced from the pretreatment unit into multiple filtration units. The flat bags within each filtration unit trap fine particles in the exhaust gas, effectively removing dust. Mechanical cleaning devices and a repositioning auxiliary mechanism ensure that dust does not accumulate on the surface of the flat bags for extended periods, thus guaranteeing filtration efficiency. The treated clean exhaust gas is discharged from the outlet, and the recovered dust is collected in a dust collection device.

[0071] This solution has a simple structure and high filtration efficiency, making it suitable for treating various industrial exhaust gases, especially those with high levels of smoke and dust.

[0072] Example 3:

[0073] The filter units of this flat bag dust collector can also be used for dust control at construction sites. A temporary dust collection system can be set up on the construction site, with the system inlet directly connected to the site area, and multiple filter units operating in parallel. The system outlet is connected to a fan to discharge the filtered clean air.

[0074] Dust generated during construction is carried by the airflow into the filtration unit and filtered layer by layer by the flat bags. Mechanical dust removal devices and a shifting auxiliary mechanism ensure that dust does not accumulate on the surface of the flat bags, guaranteeing long-term, efficient system operation. The treated clean air is then discharged by a fan, without polluting the surrounding environment.

[0075] This solution is easy to move and quick to construct, and the number of filter units can be adjusted according to the size of the construction area, making it highly adaptable. Furthermore, the entire process produces no secondary pollution and achieves excellent treatment results. It can significantly reduce the impact of construction on the surrounding environment.

[0076] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in the present invention, and these should all be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A filter unit for a flat bag dust collector, characterized in that, include: Support frame (1), multiple flat bags (11) fixedly installed on the support frame (1), bag cage skeleton (12) installed inside the flat bags (11) for support, mechanical cleaning device (2) installed outside each flat bag (11) for scraping the surface of the filter material, and a shifting auxiliary mechanism (3) for providing working direction change for the mechanical cleaning device (2). The mechanical dust removal device (2) includes: a connecting rod (21) vertically arranged between the support beams (13) and rotatably connected to the support beams (13); a guide frame (221) mounted between adjacent connecting rods (21); a main body part (224) sleeved on the guide frame (221) and threadedly connected to the connecting rod (21); a reversing passive rod (228) fixed at both ends of the main body part (224); and a dust scraper (227) provided on the main body part (224). The shifting auxiliary mechanism (3) includes: a mechanism body (31) fixedly disposed above the support beam (13), a lever (32) with one end rotatably connected to the mechanism body (31) and the other end rotatably connected to the shifting passive lever (228) of the main body (224), a slider (34) slidably disposed in the mechanism body (31) and hinged to the lever (32), and a tension spring (36) for driving the slider (34) to slide. The shifting auxiliary mechanism (3) is also provided with: a trigger (37) fixedly installed on the connecting rod (21), and the trigger (37) is rotatably connected to the lever (32); The shifting auxiliary mechanism (3) is further provided with a drive member (38) that slides on the connecting rod (21), and the drive member (38) abuts against the trigger member (37); The trigger (37) includes: a connecting part (371) coaxially connected to the lever (32); and a push rod (372) fixedly disposed on the connecting part (371) and perpendicular to the connecting part (371). The driving component (38) includes: a guide groove (381) disposed on the connecting rod (21); a transmission component (382) slidably disposed in the guide groove (381) and abutting against the trigger (37); an abutting part (383) fixed at one end of the transmission component (382); and an abutting end (384) fixed at the other end of the transmission component (382). When the lever (32) rotates to one side, the slider (34) moves upward against the tension of the tension spring (36). When the lever (32) passes the vertical position, the tension spring (36) recovers from the stretched state and drives the lever (32) to rotate to the other side. The lever (32) moves the reversing passive rod (228) to drive the mechanical dust removal device (2) to reverse, so as to realize the alternating scraping of dust on both sides of the flat bag (11).

2. The flat bag dust collector filter unit according to claim 1, characterized in that, The support frame (1) is provided with support beams (13) for supporting the cage frame (12) below.

3. The flat bag dust collector filter unit according to claim 1, characterized in that, The mechanical dust removal device (2) further includes: a transmission wheel (16) fixedly disposed on the outside of the support beam (13), the transmission wheel (16) being fixedly connected to the connecting rod (21); and a transmission belt (17) disposed between the transmission wheels (16).

4. The flat bag dust collector filter unit according to claim 3, characterized in that, The mechanical dust removal device (2) is also equipped with a pressure transmission wheel (18) for increasing the transmission force.

5. The flat bag dust collector filter unit according to any one of claims 1-4, characterized in that, The cooperation between the mechanical dust removal device (2) and the shifting auxiliary mechanism (3) enables the mechanical dust scraping of both sides of the flat bag (11) to work alternately.

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