A low emission bag dust collector

Abstract

The present invention discloses a low-emission bag dust collector, which relates to the field of dust removal and filtration technology, including an upper cavity, a lower cavity, a filter bag and a dust cleaning device, wherein the upper cavity is provided with an exhaust port, the lower cavity is provided with an air inlet, and the dust cleaning device includes a blocking plate arranged inside the filter bag and a dust cleaning box arranged outside the filter bag, the blocking plate and the dust cleaning box can fit the filter bag and move, and the blocking plate is connected to an air source. The present invention provides a dust cleaning box and a blocking plate, and the dust cleaning box and the blocking plate can cooperate to cover the surface of the filter bag to be cleaned, so that the filter bag at this location is basically not affected by negative pressure, and uses an air source to blow back the filter bag from the inner cavity of the blocking plate, thereby greatly improving the dust cleaning effect.

Description

Technical Field

[0001] The invention relates to the technical field of dust removal and filtration, and in particular to a low-emission bag dust collector. Background Art

[0002] Bag dust collector is a highly efficient dust filtering device, which is widely used in industrial production activities that generate a lot of dust, such as furnaces, mining and cement production. Bag dust collector generally includes a shell, air inlet, exhaust port, filter bag and cleaning system. After the dust-carrying airflow entering the shell from the air inlet passes through the filter bag, the dust is intercepted by the filter bag, and the purified airflow is discharged from the exhaust port. The cleaning system cleans the filter bag regularly.

[0003] A common cleaning system is the air pulse cleaning system. The air pulse cleaning system injects pulse airflow into the filter bag to rapidly expand and contract the filter bag, thereby shaking off the dust. However, for bag dust collectors used in environments with high air humidity and dust that easily adheres, the dust adhering to the surface of the filter bag is difficult to fully remove simply by blowing air to drive the filter bag to shrink, affecting the filtering effect of the bag dust collector. This cleaning method also affects the normal use of the bag dust collector, and it is often necessary to stop the machine for cleaning to prevent the shaken dust from being re-adsorbed onto the filter bag before it has completely fallen. Summary of the invention

[0004] The present invention provides a low-emission bag filter, which can clean filter bags by providing a movable dust cleaning box and a sealing plate, thereby solving at least part of the problems existing in the above-mentioned prior art.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows.

[0006] A low-emission bag dust collector comprises a shell, the inner cavity of the shell is divided into an upper cavity and a lower cavity, at least one filter bag connected with the upper cavity is arranged in the lower cavity, the upper cavity is provided with an exhaust port, the lower cavity is provided with an air inlet, and a cleaning device for cleaning the filter bag is arranged in the lower cavity, the cleaning device comprises a sealing plate arranged inside the filter bag and a cleaning box arranged outside the filter bag, the sealing plate and the cleaning box can move in accordance with the filter bag, the top of the cleaning box is provided with an openable and closable top cover, the bottom of the cleaning box is connected to an extension cylinder, the side of the cleaning box close to the filter bag is open and can cooperate with the sealing plate to cover the inner and outer sides of the filter bag there, the sealing plate is connected to an air source, the air source is used to convey airflow into the cavity between the sealing plate and the filter bag, so that the airflow blows the dust on the outside of the filter bag to the cleaning box.

[0007] Preferably, the top cover is slidably matched with the dust cleaning box, side panels are fixed on both sides of the top cover, and brush rods are provided on the side panels. When the top cover closes the top of the dust cleaning box, the brush rods can scrape the surface of the filter bag in the dust cleaning box.

[0008] Preferably, a slide groove parallel to the moving direction of the dust cleaning box is provided on the side plate, a slider is slidably installed in the slide groove, and the brush rod is rotatably installed on the slider.

[0009] Preferably, a rack parallel to the slide groove is fixed on the side plate, and a gear meshing with the rack is fixed on the rotating shaft of the brush rod.

[0010] Preferably, a support rod is fixed on one side of the dust cleaning box, the support rod is fixedly connected to the sealing plate, a drive sleeve is movably sleeved on the support rod, and a transmission mechanism is arranged between the drive sleeve, the top cover and the brush rod. When the drive sleeve moves along the support rod, the transmission mechanism can make the top cover slide on the top of the dust cleaning box, and the transmission mechanism can make the brush rod move along the slide groove.

[0011] Preferably, the transmission mechanism includes a pressing sleeve movably connected to the support rod located below the driving sleeve, a connecting rod is hinged on the pressing sleeve, and the connecting rod is hinged to the top cover; a spring 1 is sleeved on the support rod between the pressing sleeve and the driving sleeve, a pressing rod extending out of the top cover is fixed on the sliding block, a cross plate is fixed on the top end of the pressing rod, a spring 2 is sleeved on the pressing rod between the cross plate and the top cover, a pressing plate for pressing the cross plate is fixed on the driving sleeve, and a limiting structure is arranged between the driving sleeve and the pressing sleeve.

[0012] Preferably, the limiting structure includes a limiting rod fixed on the pressing sleeve and parallel to the support rod, and a limiting ring fixed on the driving sleeve, the limiting ring is sleeved on the limiting rod, and a limiting head is provided at one end of the limiting rod and the limiting ring away from the pressing sleeve.

[0013] Preferably, an electric push rod 1 is provided in the upper cavity, and the electric push rod 1 is fixedly connected to the sealing plate through a connecting frame, and the electric push rod 1 can drive the sealing plate to move along the filter bag.

[0014] Preferably, the extension tube is a hollow cylinder, and the height of the bottom end of the extension tube is lower than the height of the air inlet.

[0015] Preferably, the cross section of the filter bag is rectangular, and two U-shaped frames for supporting the filter bag are arranged in the filter bag, and the U-shaped frames are fixedly connected to the bottom of the upper cavity.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: by arranging a cleaning box and a sealing plate, the cleaning box and the sealing plate can cooperate to cover the surface of the filter bag to be cleaned, and the sealing plate can seal the inner side of the filter bag at that location, so that the filter bag at that location is basically not affected by negative pressure, and at the same time, an air source can be used to back-blow the filter bag from the inner cavity of the sealing plate, so that the dust on the surface of the filter bag falls into the cleaning box and is guided to the bottom of the shell through the extension tube, so as to avoid the cleaned dust being blown to the filter bag again by the dust-laden airflow, thereby greatly improving the cleaning effect; the present invention cleans the filter bag section by section, and during the cleaning process, the normal filtration of the rest of the filter bag is not affected, so there is no need to stop the machine for cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the external structure of the present invention.

[0018] Figure 2 It is a three-dimensional diagram of the internal structure of the present invention.

[0019] Figure 3 It is a structural schematic diagram of the present invention.

[0020] Figure 4 It is a top view of the dust cleaning device and the filter bag of the present invention.

[0021] Figure 5 It is a three-dimensional diagram of the dust cleaning device and the filter bag of the present invention.

[0022] Figure 6 It is a structural schematic diagram of the dust cleaning box of the present invention.

[0023] Figure 7 for Figure 6 A partial enlarged view of point A in the middle.

[0024] Figure 8 It is a schematic diagram of the coordination between the dust cleaning box and the sealing plate of the present invention.

[0025] In the figure: 1, shell, 11, upper cavity, 111, exhaust port, 12, lower cavity, 121, air inlet, 13, dust hopper, 14, partition, 2. Filter bag, 3. Sealing plate, 4. Dust box, 41. Top cover, 411. Side plate, 412. Brush rod, 413. Slide groove, 414. Slider, 415. Rack, 416. Gear, 42. Extension tube, 43. Support rod, 44. Drive sleeve, 441. Pressure plate, 45. Pressure sleeve, 46. Connecting rod, 47. Spring one, 48. Pressure rod, 481. Cross plate, 482. Spring two, 49. Guide rod, 491. Sliding sleeve, 5. Limit rod, 51. Limit ring, 52. Limit head, 6. Electric push rod one, 7. Electric push rod two, 8. U-shaped frame, 9. Connecting frame one, 10. Connecting frame two, 101. Air pipe. DETAILED DESCRIPTION

[0026] The following is a clear and complete description of the technical solutions in the implementation of the present invention in conjunction with the accompanying drawings. 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.

[0027] Example 1

[0028] like Figures 1 to 8As shown, a low-emission bag dust collector provided by Example 1 of the present invention includes a shell 1 and a filter bag 2. The inner cavity of the shell 1 is divided into an upper cavity 11 and a lower cavity 12 by a partition 14. One side of the upper cavity 11 is connected to an exhaust port 111, and one side of the lower cavity 12 is connected to an air inlet 121. A dust hopper 13 is provided at the bottom of the lower cavity 12. Two filter bags 2 are arranged in the lower cavity 12. The cross-section of the filter bag 2 of this embodiment is rectangular, and the whole is in the shape of a rectangular parallelepiped. Two U-shaped frames 8 arranged in parallel and capable of supporting the filter bag 2 are provided in the filter bag 2, and the top of the U-shaped frame 8 is fixedly connected to the partition 14. A through hole is opened at a position corresponding to the bag opening of the filter bag 2 on the partition 14, and the inner cavity of the filter bag 2 is connected to the upper cavity 11 through the through hole. When the dust-laden airflow enters the lower cavity 12 from the air inlet 121 , the dust-laden airflow will be filtered by the filter bag 2 , and the filtered airflow is discharged from the air outlet 111 , thus completing efficient filtration of the dust.

[0029] After long-term use of the filter bag 2, too much dust accumulates on the surface of the filter bag 2, which will affect the filtering efficiency. Therefore, the present invention provides a cleaning device for cleaning the filter bag 2 in the lower cavity 12. The cleaning device of the present invention can clean the flat surface of the filter cloth. Figure 4 As shown, in order to clean the four sides of the rectangular filter bag 2, this embodiment provides a cleaning device on each of the four sides of the filter bag 2. The basic structure of the cleaning device is the same, and its size is determined according to the size of the side of the filter bag 2.

[0030] Specifically, Figures 6 to 8As shown, the dust cleaning device of the present invention includes a blocking plate 3 arranged inside the filter bag 2 and a dust cleaning box 4 arranged outside the filter bag 2. The blocking plate 3 has an inner cavity, which can cover a part of the filter bag 2 from the inside of the filter bag 2. Since the inner side of this part of the filter bag 2 is blocked by the blocking plate 3, the airflow cannot flow, and the dust on this part of the filter cloth is no longer affected by the negative pressure inside the filter bag 2, and it is easier to get out of the filter bag 2. The blocking plate 3 and the dust cleaning box 4 can cooperate to fit the filter bag 2 from the inside and outside of the filter bag 2 and move. The top of the dust cleaning box 4 is provided with an openable top cover 41, and the side of the dust cleaning box 4 close to the filter bag 2 is open and can cooperate with the blocking plate 3 to cover the inside and outside of the filter bag 2. When the top cover 41 is opened, the dust cleaning box 4 is moved upward, so that the dust on the surface of the filter cloth at this place is in the dust cleaning box 4. When the top cover 41 is closed, the dust cleaning box 4 cooperates with the top cover 41 to cover the dust on the outer surface of the filter bag 2 at this place. The bottom of the dust cleaning box 4 is connected to an extension tube 42, which is a hollow cylinder. The inner cavity of the blocking plate 3 is connected to an air source through an air pipe 101, and the air source can be a gas cylinder. The air source can deliver airflow to the cavity between the blocking plate 3 and the filter bag 2, and the airflow blows the dust on the outside of the filter bag 2 into the dust cleaning box 4, and transports the dust to the dust hopper 13 through the extension tube 42. In order to prevent the dust from being carried away by the airflow coming in from the air inlet 121 when it falls from the extension tube 42, the bottom end height of the extension tube 42 is lower than the height of the air inlet 121.

[0031] Since the dust cleaning box 4 and the sealing plate 3 of the present invention gradually move upward along the filter bag 2, the surface of the filter bag 2 is gradually cleaned. During this process, the remaining surface of the filter bag 2 still has filtering capacity. Therefore, the dust cleaning device of the present invention does not affect the normal dust removal work during cleaning.

[0032] like Figure 2 and Figure 3 As shown, since multiple dust cleaning devices are provided in this embodiment, in order to facilitate simultaneous control of the movement of the dust cleaning boxes 4 and the blocking plates 3 in the multiple dust cleaning devices, a connecting frame 9 is provided in the housing 1. The connecting frame 9 is fixedly connected to all the blocking plates 3, and is also fixedly connected to the support rod 43 fixed on one side of the dust cleaning box 4. An electric push rod 6 is fixed in the upper cavity 11, and the electric push rod 6 can drive the connecting frame 9 to move, thereby realizing synchronous driving of the blocking plate 3 and the dust cleaning box 4 to move along the filter bag 2.

[0033] Example 2

[0034] On the basis of Example 1, the present invention further proposes Example 2, an improved solution of Example 1. Specifically, the top cover 41 is opened and closed by slidingly cooperating with the dust cleaning box 4. A guide rod 49 perpendicular to the filter bag 2 is fixed on one side of the dust cleaning box 4, and a sliding sleeve 491 is fixed on the top cover 41, and the sliding sleeve 491 is sleeved on the guide rod 49. When the sliding sleeve 491 moves along the guide rod 49, the top cover 41 can be opened and closed at the top of the dust cleaning box 4.

[0035] In order to further improve the dust cleaning ability, such as Figure 7 and Figure 8 As shown, side plates 411 are fixed on both sides of the top cover 41, and a slide groove 413 parallel to the moving direction of the dust cleaning box 4 is opened on the side plate 411, and a slider 414 is slidably installed in the slide groove 413, and a brush rod 412 is rotatably installed on the slider 414. The surface of the brush rod 412 has bristles. When the top cover 41 closes the top of the dust cleaning box 4, the brush rod 412 can contact the surface of the filter bag 2. By pushing the slider 414 to move along the slide groove 413, the brush rod 412 can scrape the surface of the filter bag 2 in the dust cleaning box 4, and the dust on the surface of the filter bag 2 can be scraped into the dust cleaning box 4. Under the action of the brush rod 412, the dust that is not blown away by the air source can be brushed off, thereby improving the dust cleaning ability.

[0036] A rack 415 parallel to the chute 413 is fixed on the side plate 411, and a gear 416 meshing with the rack 415 is fixed on the rotating shaft of the brush rod 412. Thus, when the slider 414 moves in the chute 413, the gear 416 cooperates with the rack 415 to rotate the brush rod 412, thereby better brushing off the dust in the fibers of the filter bag 2.

[0037] In order to control the opening and closing of the top cover 41 and the movement of the brush rod 412, a driving sleeve 44 is movably sleeved on the support rod 43, and a transmission mechanism is arranged between the driving sleeve 44, the top cover 41 and the brush rod 412. When the driving sleeve 44 moves along the support rod 43, the transmission mechanism can make the top cover 41 slide on the top of the dust cleaning box 4, and can make the brush rod 412 move along the slide groove 413 after the top cover 41 is closed.

[0038] Specifically, Figure 5 and Figure 6 As shown, the transmission mechanism includes a pressing sleeve 45 movably sleeved on the support rod 43 located below the driving sleeve 44, and a connecting rod 46 is hinged on the pressing sleeve 45. The end of the connecting rod 46 away from the pressing sleeve 45 is hinged to the top cover 41, so that when the pressing sleeve 45 moves on the support rod 43, it will drive the top cover 41 to move, so that the top cover 41 moves along the guide rod 49. A spring 1 47 is sleeved on the support rod 43 between the pressing sleeve 45 and the driving sleeve 44, so that when the driving sleeve 44 presses down the spring 1 47, it can push the pressing sleeve 45, so that the pressing sleeve 45 drives the top cover 41 to close. When the top cover 41 is closed, the driving sleeve 44 continues to press down the spring 1 47, and the spring 1 47 is compressed. At this time, the pressing sleeve 45 does not move, and the driving sleeve 44 can continue to move downward.

[0039] A pressure rod 48 extending out of the top cover 41 is fixedly connected to the slider 414. When the pressure rod 48 moves up and down, it can drive the slider 414 to move in the slide groove 413. A horizontal plate 481 is fixed to the top of the pressure rod 48, and a spring 2 482 is sleeved on the pressure rod 48 between the horizontal plate 481 and the top cover 41. By fixing a pressure plate 441 for pressing the horizontal plate 481 on the driving sleeve 44, when the driving sleeve 44 moves downward, so that the pressure plate 441 presses the horizontal plate 481, the spring 2 482 is compressed, and the pressure rod 48 moves the brush rod 412 downward. At the same time, the brush rod 412 rotates under the action of the gear 416 and the rack 415, and the dust on the surface of the filter bag 2 is brushed and dropped into the dust cleaning box 4.

[0040] A limiting structure is provided between the driving sleeve 44 and the pressing sleeve 45. When the driving sleeve 44 moves upward, it can drive the pressing sleeve 45 to move upward, thereby opening the top cover 41, and the brush rod 412 moves to the top of the slide groove 413 under the action of the spring 2 482. Specifically, the limiting structure includes a limiting rod 5 fixed on the pressing sleeve 45 and parallel to the support rod 43, and a limiting ring 51 fixed on the driving sleeve 44. The limiting ring 51 is movably sleeved on the limiting rod 5, and a limiting head 52 is provided on the limiting rod 5 at one end of the limiting ring 51 away from the pressing sleeve 45. When the limiting ring 51 abuts against the limiting head 52, the driving sleeve 44 continues to move upward, and the driving sleeve 44 can drive the pressing sleeve 45 to move upward.

[0041] In order to simultaneously drive the top covers 41 and brush rods 412 in multiple dust cleaning devices, a connecting frame 2 10 is provided in the housing 1, and the connecting frame 2 10 is fixedly connected to all the driving sleeves 44, and an electric push rod 2 7 is fixed between the connecting frame 1 9 and the connecting frame 2 10. When the electric push rod 2 7 is working, the driving sleeve 44 can be pushed to move relative to the support rod 43, so as to realize the opening and closing of all the top covers 41 and the lifting and lowering of all the brush rods 412.

[0042] During use: start the electric push rod 1 6 and the electric push rod 2 7 regularly, and the electric push rod 1 6 drives the blocking plate 3 and the dust cleaning box 4 to rise or fall along the filter bag 2. Before the dust cleaning box 4 rises, start the electric push rod 2 7 to move the drive sleeve 44 and open the top cover 41. When the dust cleaning box 4 rises a certain distance, control the electric push rod 2 7 to move the drive sleeve 44, close the top cover 41 and move the brush rod 412 downward to brush off the dust on the surface of the filter bag 2 corresponding to the dust cleaning box 4. At this time, the air source is also delivering air, and the filter bag 2 is back-blown from the inside of the filter bag 2 to promote the separation of dust on the filter bag 2. Since the surface of the filter bag 2 covered by the dust cleaning box 4 and the blocking plate 3 is basically not affected by the negative pressure environment and the dust-containing airflow, the dust is easy to separate and fall into the dust collecting hopper 13 along the extension tube 42. After cleaning this section of the surface of the filter bag 2, move the dust cleaning box 4 up again and repeat the dust cleaning process.

[0043] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit and essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0044] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A low-emission bag filter, comprising a housing (1), wherein the inner cavity of the housing (1) is divided into an upper cavity (11) and a lower cavity (12), wherein the lower cavity (12) is provided with at least one filter bag (2) whose inner cavity is connected to the upper cavity (11), the upper cavity (11) is provided with an air outlet (111), and the lower cavity (12) is provided with an air inlet (121), wherein: A cleaning device for cleaning the filter bag (2) is arranged in the lower cavity (12), the cleaning device comprising a sealing plate (3) arranged inside the filter bag (2) and a cleaning box (4) arranged outside the filter bag (2), the sealing plate (3) having an inner cavity capable of covering a portion of the filter bag (2) from the inside of the filter bag (2), the sealing plate (3) and the cleaning box (4) being capable of moving in close contact with the filter bag (2), and a removable cover is arranged on the top of the cleaning box (4). An opening and closing top cover (41), the bottom of the dust cleaning box (4) is connected to an extension tube (42), the dust cleaning box (4) is open on one side close to the filter bag (2) and can cooperate with the sealing plate (3) to cover the outside and inside of the filter bag (2), the sealing plate (3) is connected to an air source, and the air source is used to convey airflow into the cavity between the sealing plate (3) and the filter bag (2), so that the airflow blows the dust on the outside of the filter bag (2) into the dust cleaning box (4); A connecting frame (9) is provided in the shell (1), the connecting frame (9) is fixedly connected to all the sealing plates (3), and is also fixedly connected to a support rod (43) fixed to one side of the dust cleaning box (4); an electric push rod (6) is fixed in the upper cavity (11), and the electric push rod (6) can drive the connecting frame (9) to move, thereby synchronously driving the sealing plates (3) and the dust cleaning box (4) to move along the filter bag (2); The top cover (41) is slidably matched with the dust cleaning box (4), side panels (411) are fixed on both sides of the top cover (41), and brush rods (412) are provided on the side panels (411). When the top cover (41) closes the top of the dust cleaning box (4), the brush rods (412) can scrape the surface of the filter bag (2) in the dust cleaning box (4); The side plate (411) is provided with a slide groove (413) parallel to the moving direction of the dust cleaning box (4), a slider (414) is slidably mounted in the slide groove (413), and the brush rod (412) is rotatably mounted on the slider (414); A support rod (43) is fixed to one side of the dust cleaning box (4), a drive sleeve (44) is movably sleeved on the support rod (43), a transmission mechanism is provided between the drive sleeve (44), the top cover (41) and the brush rod (412), and when the drive sleeve (44) moves along the support rod (43), the transmission mechanism can make the top cover (41) slide on the top of the dust cleaning box (4), and the transmission mechanism can make the brush rod (412) move along the slide groove (413); The transmission mechanism comprises a pressing sleeve (45) movably sleeved on a support rod (43) located below the driving sleeve (44); a connecting rod (46) is hingedly connected to the pressing sleeve (45); and the connecting rod (46) is hingedly connected to the top cover (41); a spring 1 (47) is sleeved on the support rod (43) between the pressing sleeve (45) and the driving sleeve (44); a pressing rod (48) extending out of the top cover (41) is fixed to the slider (414); a transverse plate (481) is fixed to the top of the pressing rod (48); a spring 2 (482) is sleeved on the pressing rod (48) between the transverse plate (481) and the top cover (41); a pressing plate (441) for pressing the transverse plate (481) is fixed to the driving sleeve (44); and a limiting structure is provided between the driving sleeve (44) and the pressing sleeve (45).

2. A low emission bag filter as claimed in claim 1, characterized in that: A rack (415) parallel to the slide groove (413) is fixed on the side plate (411), and a gear (416) meshing with the rack (415) is fixed on the rotating shaft of the brush rod (412).

3. A low emission bag filter as claimed in claim 1, characterized in that: The limiting structure comprises a limiting rod (5) fixed on the pressing sleeve (45) and parallel to the support rod (43), and a limiting ring (51) fixed on the driving sleeve (44); the limiting ring (51) is sleeved on the limiting rod (5); and a limiting head (52) is provided at one end of the limiting ring (51) away from the pressing sleeve (45).

4. A low emission bag filter as claimed in claim 1, characterized in that: The extension tube (42) is a hollow cylinder, and the height of the bottom end of the extension tube (42) is lower than the height of the air inlet (121).

5. A low emission bag filter as claimed in claim 1, characterized in that: The filter bag (2) has a rectangular cross-section, and two U-shaped frames (8) for supporting the filter bag (2) are arranged inside the filter bag (2), and the U-shaped frames (8) are fixedly connected to the bottom of the upper cavity (11).

Images