An explosion-proof bag-type dust collector

Abstract

The application discloses an anti-explosion bag type dust collector, which comprises a support and a shell, wherein the bottom of the shell is provided with a dust hopper and a dust discharging valve, the upper and lower parts of the shell are respectively provided with a gas outlet and a gas inlet and a pressure relief valve, and the inner middle part of the shell is provided with a filtering device; the pressure relief valve comprises a pressure relief valve shell which is in a circular tube shape and has a closed outer end, a filter screen is arranged at the inner end of the pressure relief valve shell, a pressure relief hole is arranged at the inner side close to the outer end of the pressure relief valve shell and is provided with an on-off switch, and a circular sliding block is arranged at the inner middle part of the pressure relief valve shell; a first spring is arranged between one side of the circular sliding block and the inner side of the outer end of the pressure relief valve shell, a plurality of rectangular strips are movably connected to the other side of the circular sliding block, a plurality of L-shaped blocks corresponding to the rectangular strips are movably arranged at the inner side edge of the filter screen, the corners of the L-shaped blocks are movably connected to the other ends of the corresponding rectangular strips, and a second spring is arranged between the L-shaped blocks and the inner wall of the pressure relief valve shell; and an electric valve connected with the on-off switch is arranged on the gas inlet. The application can effectively solve the problems of substandard exhaust and explosion hazards of the bag type dust collector.

Description

An explosion-proof bag filter Technical Field

[0001] This invention belongs to the field of dust removal technology, and relates to an explosion-proof bag filter, and more particularly to an explosion-proof bag filter for preparing coking raw materials. Background Technology

[0002] In the steel industry, coal is the primary fuel, burned in the form of pulverized coal. However, pulverized coal is highly explosive; in workshops where large quantities of coal are stored, the concentration of coal ash can easily reach a certain level, causing a dust explosion. Therefore, in actual production, dust collectors are typically used to filter and remove coal ash. Currently, baghouse dust collectors are commonly used for this purpose.

[0003] A search revealed that utility model patent CN209155343U discloses an explosion-proof baghouse dust collector, which includes a dust collection chamber, a dust inlet pipe, a clean air chamber, filter bags, a breathing valve, a clean air outlet pipe, a powder collection cone, an ash discharge valve, a check valve, an automatic pressure relief valve, a pressure relief pipe, a flame arrester, a filter, a reverse-air cleaning system, and a support frame. The filter bags are located inside the dust collection chamber, the dust inlet pipe is located at the bottom side of the dust collection chamber, a check valve is installed on the dust inlet pipe, the breathing valve is located at the top of the dust collection chamber, the automatic pressure relief valve is located at the top of the dust collection chamber, the two ends of the pressure relief pipe are fixedly connected to the automatic pressure relief valve and the clean air outlet pipe, respectively, the flame arrester and the filter are installed on the pressure relief pipe, the clean air chamber is located above the dust collection chamber, the clean air outlet pipe is located on the clean air chamber, the reverse-air cleaning system includes a compressed air source and a blowing pipe, the powder collection cone is located below the dust collection chamber, and an ash discharge valve is installed at the bottom of the powder collection cone. This utility model can effectively prevent the dust collector from exploding. However, during dust collection in this type of explosion-proof baghouse dust collector, the filter bags are subjected to exhaust filtration and backwashing. The filter bag openings are prone to loosening, and if dust leakage occurs, the exhaust gas will not meet standards. This necessitates shutdown, inspection, and replacement of each leaking filter bag, severely impacting work efficiency. Furthermore, although the explosion-proof baghouse dust collector is equipped with an automatic pressure relief valve, and a filter is installed at the valve, if the filter bags and filter are not cleaned promptly after prolonged operation, excessive dust accumulation on the filter bags and filter exterior can easily cause excessive internal pressure within the dust collector, posing a potential explosion hazard. Summary of the Invention

[0004] To address the technical problems existing in the background art, the present invention provides an explosion-proof bag dust collector, which can effectively solve the problems of dust leakage caused by the filter bags being subjected to exhaust filtration and backwash dust removal, resulting in the filter bags loosening at the bag opening and causing the exhaust gas to fail to meet standards, requiring shutdown to check and replace each filter bag, which seriously affects work efficiency, as well as the problem of explosion safety hazards caused by the failure to clean the filter bags and filtration equipment in a timely manner.

[0005] The technical solution of this invention to solve the technical problem is as follows:

[0006] This invention discloses an explosion-proof bag filter, comprising a support frame and a housing mounted on the support frame. A dust hopper is located at the bottom of the housing, and a dust discharge valve is located at the bottom of the dust hopper. An air inlet and a pressure relief valve are connected through the lower part of the housing, and an air outlet is connected through the upper part. A filter device is located in the middle of the inner side. The pressure relief valve includes a cylindrical, closed-end pressure relief valve housing that is connected through the housing. A filter screen is fixedly mounted at the inner port of the pressure relief valve housing. Several pressure relief holes and a switch are provided on the inner wall of the housing near the outer end. A circular slider is slidably mounted in the middle of the inner side. A first spring is provided between one side of the circular slider and the inner side of the outer end of the pressure relief valve housing, and multiple rectangular strips are movably connected to the other side. Multiple L-shaped blocks corresponding to the rectangular strips are movably mounted along the inner edge of the filter screen. The corners of each L-shaped block are movably connected to the other end of their respective rectangular strips. A second spring is provided between each L-shaped block and the inner wall of the pressure relief valve housing. An electric valve electrically connected to the switch is provided on the air inlet.

[0007] Furthermore, the dimensions of each L-shaped block are different or partially different.

[0008] Furthermore, the filtration device includes a perforated plate detachably disposed inside the housing. The perforated plate has a plurality of evenly spaced circular holes, and a filter bag is fixedly disposed at each of the circular holes. A partition is disposed on the upper surface of the perforated plate, dividing the upper end of each filter bag into multiple independent spaces. A dust detector is disposed inside each independent space, and a top plate is disposed on the top of each independent space. Each top plate has a through hole corresponding to the filter bag. A pulse valve is disposed through the upper part of the housing, and a pipe connected to the pulse valve is disposed inside the housing above the filtration device. Multiple nozzles corresponding to the through holes on each of the top plates are respectively connected below the pipe.

[0009] Furthermore, a filter bag frame is provided at the top of the filter bag, and the filter bag frame is provided at the circular hole in the tube sheet by providing a rubber sealing ring on the outside.

[0010] Furthermore, an annular groove is provided at the circular hole on the flower plate, and the rubber sealing ring is disposed in the annular groove.

[0011] Furthermore, a fixing ring is detachably installed on the upper part of each circular hole in the flower plate, and at least two rectangular slots are symmetrically opened on the fixing ring; a hollow circular plate is installed above the fixing ring, and at least two circular tubes are symmetrically arranged on the lower surface of the top plate, with an electric telescopic rod installed inside the circular tube, the top end of the electric telescopic rod connected to the upper surface of the hollow circular plate; rectangular holes corresponding to the rectangular slots are opened on the hollow circular plate, and a central ring is installed inside it, with multiple first circular holes at the bottom of the central ring; a matching pointed block is respectively secured in each rectangular slot by a third spring, and the pointed block... The upper ends of the blocks are respectively inserted into the corresponding rectangular holes on the hollow circular plate; a fixing device is provided inside the filter bag frame, the fixing device includes a ring structure formed by connecting the ends of multiple first arc-shaped blocks with the same number as the first circular holes through a fifth spring, each first arc-shaped block has a second circular hole on its inner side and an arc-shaped groove on its outer side, and a matching second arc-shaped block is respectively provided in the arc-shaped groove on the outer side of two adjacent first arc-shaped blocks, and a fourth spring is provided between the ends of adjacent second arc-shaped blocks; each first circular hole corresponds to a second circular hole and is movably connected by a round-headed rod.

[0012] Furthermore, a sixth spring is provided between the bottom of the hollowed-out circular plate and the rubber sealing ring.

[0013] Compared with the prior art, the explosion-proof bag filter of the present invention has the following advantages:

[0014] (1) The present invention has a novel design, a simple and reasonable structure, low cost, and good performance.

[0015] (2) The pressure relief valve on the housing of the present invention is provided with a circular slider, a first spring, a second spring, a rectangular bar, an L-shaped block, a filter screen, a pressure relief hole, a switch, a pneumatic valve, etc. When the pressure inside the housing is too high, the excessive pressure inside the housing pushes the circular slider to slide inside the pressure relief valve housing and squeeze the first spring. When it slides to the pressure relief valve near the outer end, it touches the switch and starts the electric valve to close, blocking the air inlet. At the same time, the excessively pressurized gas inside the housing is discharged from the pressure relief holes opened on both sides of the pressure relief valve housing to relieve the pressure inside the housing and prevent the excessive pressure from causing an explosion.

[0016] (3) The explosion-proof bag dust collector of the present invention, when the gas is discharged by pushing the circular slider to release pressure, the gas in the shell is filtered by the filter screen. After filtration, dust is easily attached to one side of the filter screen, causing blockage and affecting the exhaust. When the circular slider slides outward, the rectangular bar pulls the L-shaped block to squeeze the second spring. After the pressure is released, the circular slider slides to the side of the filter screen. The second spring drives one end of the L-shaped block to rotate, and the other end knocks on one side of the filter screen. The dust attached to the filter screen falls off, effectively preventing the filter screen from being blocked. In addition, because the size of the L-shaped block at the turning point is different, it can knock the filter screen multiple times. After multiple knocks, the cleaning effect of the filter screen is better.

[0017] (4) The explosion-proof bag dust collector of the present invention has a fixing device that can fix the filter bag for a second time by setting an electric telescopic rod, a hollow circular plate, a fixing ring, a fixing device and a rubber sealing ring in the filter device. With the help of the dust detector, the specific cause of the filter bag leakage can be identified. By observing the dust detector signal above each filter bag, the damaged filter bag can be found quickly and accurately for replacement. Attached Figure Description

[0018] Figure 1 is a structural schematic diagram of the explosion-proof bag dust collector of the present invention;

[0019] Figure 2 is a schematic cross-sectional view of the shell in the explosion-proof bag dust collector of the present invention;

[0020] Figure 3 is a schematic cross-sectional view of the partition plate in the explosion-proof bag dust collector of the present invention;

[0021] Figure 4 is a schematic diagram of an explosion inside the filter bag in the explosion-proof bag dust collector of the present invention;

[0022] Figure 5 is a schematic diagram of the explosion of the fixed ring in the explosion-proof bag dust collector of the present invention;

[0023] Figure 6 is a schematic diagram of an explosion inside the pressure relief valve of the explosion-proof bag filter of the present invention;

[0024] Figure 7 is a magnified view of part A in Figure 6;

[0025] In the diagram: 1. Shell; 11. Ash hopper; 12. Ash discharge valve; 13. Support; 2. Pressure relief valve; 21. First spring; 22. Circular slider; 23. Rectangular bar; 24. L-shaped block; 25. Filter screen; 26. Switch; 27. Second spring; 28. Pressure relief hole; 29. ​​Pressure relief valve shell; 3. Air inlet; 31. Electric valve; 4. Air outlet; 5. Pulse valve; 51. Pipe; 52. Nozzle; 6. Tube plate; 61. Partition plate; 62. Top plate; 63. Rubber sealing ring; 64. Dust detector; 7. Filter bag; 8. Round tube; 81. Electric telescopic rod; 82. Hollowed-out round plate; 821. Pointed block; 822. Third spring; 823. Rectangular hole; 824. First round hole; 83. Fixing ring; 831. First arc-shaped block; 832. Second arc-shaped block; 833. Fourth spring; 834. Fifth spring; 835. Second round hole; 836. Rectangular groove; 837. Sixth spring; 84. Round-headed rod; 85. Central ring; 9. Filter bag frame. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure pertains. The terms “upper,” “lower,” “left,” “right,” “front,” and “back,” as used in this patent application specification and claims, are used only to indicate relative positional relationships; these relative positional relationships change accordingly when the absolute position of the described object changes. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. All aspects not detailed herein are well-known to those skilled in the art.

[0028] Example 1:

[0029] As shown in Figures 1-7, the present invention discloses an explosion-proof bag filter dust collector, comprising a support 13 and a housing 1 supported on the support 13. The housing 1 is square in shape, with a dust hopper 11 at its bottom for collecting dust, and a dust discharge valve 12 at the bottom of the dust hopper 11 for discharging dust. An air inlet 3 and a pressure relief valve 2 are provided through the lower part of the housing 1, and an air outlet 4 is provided through the upper part. A filter device is provided in the middle of the inner side. In use, dust-laden gas is sent in through the air inlet 3, filtered by the filter device, and discharged through the air outlet 4. The filtered dust is collected in the dust hopper 11, and when a certain amount is collected, it is discharged through the dust discharge valve 12. When the air pressure inside the housing 1 is too high, the pressure is released through the pressure relief valve 2 to ensure the safety of the housing 1. The pressure relief valve 2 includes a pressure relief valve housing 29 that is cylindrical and closed at the outer end, which is provided through the housing 1. A pressure relief valve housing 29 is fixedly installed at the inner port of the pressure relief valve housing 29. The filter screen 25 has several pressure relief holes 28 and a switch 26 on its inner side near the outer end of the shell wall. A circular slider 22 is slidably arranged in the middle of its inner side. A first spring 21 is arranged between one side of the circular slider 22 and the inner side of the outer end of the pressure relief valve shell 29. Multiple rectangular bars 23 are movably connected to the other side of the circular slider 22. Multiple L-shaped blocks 24 corresponding to each rectangular bar 23 are movably arranged at the inner edge of the filter screen 25. The corner of each L-shaped block 24 is movably connected to the other end of its corresponding rectangular bar 23. A second spring 27 is arranged between each L-shaped block 24 and the inner wall of the pressure relief valve shell 29. An electric valve 31 electrically connected to the switch 26 is provided on the air inlet 3. When the circular slider 22 touches the switch 26, the electric valve 31 is turned on and closed. When the circular slider 22 leaves the switch 26, the electric valve 31 returns to the open state.

[0030] When this invention is applied, if the gas pressure inside the housing 1 is too high and there is a risk of explosion, the excessive gas inside the housing 1 is filtered by the filter screen 25. The gas pressure then pushes the circular slider 22 to slide inside the pressure relief valve 2 toward the outer end of the pressure relief valve housing 29, squeezing the first spring 21 and stretching the second spring 27. When the circular slider 22 slides to the pressure relief hole 28 of the pressure relief valve housing 29, it touches the switch 26 and activates the electric valve 31 to close and block the air inlet 3. At the same time, the high-pressure gas is discharged from the pressure relief holes 28 on both sides of the pressure relief valve 2, relieving the pressure inside the housing 11 and preventing an explosion caused by excessive pressure. In this example, the dust-laden gas is filtered through the filter screen 25 and then depressurized through the pressure relief hole 28 of the pressure relief valve 2, preventing the dust-laden gas from being discharged into the air and causing pollution. Since dust tends to adhere to the inner side of the filter screen 25 after filtration, which weakens the exhaust capacity of the pressure relief valve 2, when the housing 11 has finished depressurizing, the circular slider 22 slides towards the filter screen 25 under the action of the first spring 21. At the same time, the second spring 27 drives the outer ends of each L-shaped block 24 to rotate, and the other end of each L-shaped block 24 strikes the filter screen 25 to shake off the dust adhering to the filter screen 25. To further improve the striking effect of the L-shaped blocks 24, in this example, the size of each L-shaped block 24 can be set to be different or partially different, so as to achieve multiple strikes on the filter screen 25, resulting in a better dust removal effect.

[0031] Example 2:

[0032] As shown in Figures 1-7, based on Embodiment 1, the present invention provides an explosion-proof bag filter. The filter device includes a tube sheet 6 detachably disposed inside the housing 11. The tube sheet 6 has a plurality of evenly spaced circular holes, and a filter bag 7 is fixedly disposed at each of the circular holes. A partition 61 is disposed on the upper surface of the tube sheet 6, and the partition 61 divides the filter bag 7 into a plurality of independent spaces at the upper end of each independent space. A dust detector 64 is disposed inside each independent space, and a top plate 62 is disposed on the top of each independent space. Each top plate 62 has a through hole corresponding to the filter bag 7. A pulse valve 5 is disposed through the upper part of the housing 29. A pipe 51 connected to the pulse valve 5 is disposed inside the housing 11 above the filter device. A plurality of nozzles 52 corresponding to the through holes on each of the top plates 62 are respectively connected to the pipe 51. In this embodiment, the pulse valve 5 can be controlled to generate pulsed gas at regular intervals, and after passing through the pipeline 51, it is backflushed to each filter bag 7 through each nozzle 52 to remove dust, thereby reducing the probability of filter bag 7 clogging; the dust detector 64 can be connected to an external control device or corresponding indicator light and transmit the detection signal. When a filter bag 7 in the housing 11 becomes loose and leaks air due to backflushing dust removal, the dusty gas enters the independent space formed by the partition 61. After the dust detector 64 detects the dusty gas, it transmits the signal to the outside. Based on the signal, the staff can quickly and accurately find the leaking filter bag 7 and perform inspection and replacement, etc.

[0033] Example 3:

[0034] Based on Embodiment 2, as shown in the accompanying drawings, to facilitate the installation of the filter bag 7 on the tube sheet 6 and to enable secondary fixation after the filter bag 7 becomes loose and leaks air, the explosion-proof bag filter of the present invention includes a filter bag frame 9 at the top of the filter bag 7. The filter bag frame 9 is positioned at a circular hole in the tube sheet 6 by a rubber sealing ring 63 on its outer side. To facilitate the installation of the rubber sealing ring 63, an annular groove is formed at the circular hole in the tube sheet 6, and the rubber sealing ring 63 is positioned within the annular groove.

[0035] In this embodiment, a fixing ring 83 is detachably provided on the upper part of each circular hole of the flower plate 6. At least two rectangular slots 836 are symmetrically provided on the fixing ring 83. A hollow circular plate 82 is provided above the fixing ring 83. At least two circular tubes 8 are symmetrically provided on the lower surface of the top plate 62. An electric telescopic rod 81 is provided inside the circular tube 8, and the top end of the electric telescopic rod 81 is connected to the upper surface of the hollow circular plate 82. A rectangular hole 823 corresponding to the rectangular slot 836 is provided on the hollow circular plate 82. A central ring 85 is provided inside the hollow circular plate 82, and multiple first circular holes 824 are provided at the bottom of each central ring 85. A matching pointed block 821 is respectively engaged in each rectangular slot 836 by a third spring 822. The upper end of the pointed block 821 is inserted into the corresponding rectangular hole 823 on the hollow circular plate 82. The pointed block 821 is used to install the hollow circular plate 82. By pushing the symmetrical pointed blocks 821 inward, compression is achieved. The third spring 822 is used to align the rectangular hole 823 of the hollow circular plate 82 with the top of the pointed block 821 and put it on. Releasing the pointed block 821 will limit the hollow circular plate 82 under the action of the third spring 822. The filter bag frame 9 is provided with a fixing device inside. The fixing device includes a ring structure formed by connecting the ends of multiple first arc blocks 831 with the same number as the first circular holes 824 through a fifth spring 834. Each first arc block 831 has a second circular hole 835 inside and an arc groove outside. The arc grooves outside two adjacent first arc blocks 831 are respectively provided with matching second arc blocks 832. A fourth spring 833 is provided between the ends of adjacent second arc blocks 832. Each first circular hole 824 corresponds to a second circular hole 835 and is movably connected by a round-headed rod 84. The round-headed rod 84 is a straight rod with spherical structures for connection at both ends.

[0036] In application, when the dust detector 64 detects that a filter bag 7 is loose and leaking air, it controls the activation of the electric telescopic rod 81 in the independent space of the filter bag 7 to push the hollow circular plate 82 downward. This causes the upper end of the round-headed rod 84 to slide in the first circular hole 824 at the lower end of the hollow circular plate 82, and the lower end of the round-headed rod 84 to slide in the second circular hole 835 inside the first arc-shaped block 831. At the same time, it drives the first arc-shaped block 831 and the second arc-shaped block 832 to slide outward at the lower end of the fixing ring 83, tightly adhering to the inner wall of the filter bag 7 and squeezing the rubber sealing ring 63, thus re-fixing the filter bag 7. If the dust detector continues to generate a leakage signal after the filter bag 7 is tightly adhered to the rubber sealing ring 63, it indicates that the filter bag has a tear. At this time, the damaged filter bag can be accurately located and replaced according to the corresponding position of the signal.

[0037] In this embodiment, a sixth spring 837 is provided between the bottom of the hollow circular plate 82 and the rubber sealing ring 63 to buffer the movement of the hollow circular plate 82 downward when the electric telescopic rod 81 pushes it, thus preventing excessive extension and retraction and damage to the equipment.

Claims

1. An explosion-proof bag filter, comprising a support (13) and a housing (1) mounted on the support (13), wherein a hopper (11) is provided at the bottom of the housing (1), a discharge valve (12) is provided at the bottom of the hopper (11), an air inlet (3) and a pressure relief valve (2) are provided through the lower part of the housing (1), an air outlet (4) is provided through the upper part, and a filter device is provided in the middle of the inner side, characterized in that: The pressure relief valve (2) includes a pressure relief valve housing (29) that is tubular and closed at the outer end, which is installed through the housing (1). A filter screen (25) is fixedly installed at the inner port of the pressure relief valve housing (29). Several pressure relief holes (28) are opened on the inner side of the housing near the outer end and a switch (26) is provided. A circular slider (22) is slidably installed in the middle of the inner side. A first spring (21) is provided between one side of the circular slider (22) and the inner side of the outer end of the pressure relief valve housing (29). Multiple rectangular bars (23) are movably connected to the other side. Multiple L-shaped blocks (24) corresponding to each rectangular bar (23) are movably installed at the inner edge of the filter screen (25). The corners of each L-shaped block (24) are connected to the corresponding rectangular bar (23). The other end is movably connected, and a second spring (27) is respectively provided between each of the L-shaped blocks (24) and the inner wall of the pressure relief valve housing (29); an electric valve (31) electrically connected to the switch (26) is provided on the air inlet (3); the filter device includes a perforated plate (6) detachably provided inside the housing (1), a plurality of circular holes are evenly opened on the perforated plate (6), a filter bag (7) is fixedly provided at each of the circular holes, a partition plate (61) is provided on the upper surface of the perforated plate (6), the partition plate (61) divides the filter bag (7) into a plurality of independent spaces at the upper end of each filter bag (7), a dust detector (64) is provided inside each independent space, and a top plate (62) is provided on the top of each independent space, and each top plate (62) has an opening There are through holes corresponding to the filter bag (7); a pulse valve (5) is provided through the upper part of the housing (1), and a pipe (51) connected to the pulse valve (5) is provided on the inner side of the housing (1) above the filter device. Multiple nozzles (52) corresponding to the through holes opened on each of the top plates (62) are respectively connected to the pipe (51); a filter bag frame (9) is provided at the top of the filter bag (7), and the filter bag frame (9) is provided at the circular hole on the tube sheet (6) by providing a rubber sealing ring (63) on the outside; a fixing ring (83) is detachably provided on the upper part of each circular hole of the tube sheet (6), and at least two rectangular grooves (836) are symmetrically opened on the fixing ring (83); the fixing ring (83) has A perforated circular plate (82) is provided on the top. At least two circular tubes (8) are symmetrically arranged on the lower surface of the top plate (62). An electric telescopic rod (81) is provided inside the circular tube (8). The top end of the electric telescopic rod (81) is connected to the upper surface of the perforated circular plate (82). A rectangular hole (823) corresponding to the rectangular groove (836) is opened on the perforated circular plate (82). A central ring (85) is provided on its inner side. A plurality of first circular holes (824) are provided at the bottom of the central ring (85). A matching pointed block (821) is respectively secured in each rectangular groove (836) by a third spring (822). The upper end of the pointed block (821) is inserted into the corresponding rectangular hole (823) on the perforated circular plate (82).The filter bag frame (9) is provided with a fixing device on its inner side. The fixing device includes an annular structure formed by connecting the ends of multiple first arc-shaped blocks (831) with the same number as the first circular holes (824) through a fifth spring (834). Each first arc-shaped block (831) has a second circular hole (835) on its inner side and an arc-shaped groove on its outer side. A matching second arc-shaped block (832) is provided in the arc-shaped groove on the outer side of two adjacent first arc-shaped blocks (831). A fourth spring (833) is provided between the ends of adjacent second arc-shaped blocks (832). Each first circular hole (824) corresponds to a second circular hole (835) and is movably connected by a round-headed rod (84).

2. The explosion-proof bag filter according to claim 1, characterized in that: The dimensions of each L-shaped block (24) are different or partially different.

3. An explosion-proof bag filter according to claim 1 or 2, characterized in that: An annular groove is provided at the circular hole on the flower plate (6), and the rubber sealing ring (63) is disposed in the annular groove.

4. The explosion-proof bag filter according to claim 3, characterized in that: A sixth spring (837) is provided between the bottom of the hollow circular plate (82) and the rubber sealing ring (63).

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