Antistatic needle felt filter bag

Abstract

The invention discloses an antistatic needle felt filter bag, and relates to the technical field of filter bags. The antistatic needle felt filter bag comprises a first-level needle felt filter bag which is a tubular structure with both upper and lower ends sealed, a second-level needle felt filter bag is located inside the first-level needle felt filter bag, the second-level needle felt filter bag is a tubular structure with both upper and lower ends opened, the lower end opening of the second-level needle felt filter bag is provided with an opening and closing valve for blocking or opening the lower end opening of the second-level needle felt filter bag, and the second-level needle felt filter bag is enclosed by a plurality of needle felt sheets arranged along the length direction of the first-level needle felt filter bag; the antistatic needle felt filter bag, by providing a double-layer filter bag, performs two filtrations on the one hand to improve the filtration effect, and on the other hand, the pore diameter of the first-level needle felt filter bag can be made larger, thereby reducing the wind resistance of the first-level needle felt filter bag and reducing the dust attached to the outside of the first-level needle felt filter bag.

Description

Technical Field

[0001] The invention relates to the technical field of filter bags, in particular to an antistatic needle felt filter bag. Background Art

[0002] As the country's environmental protection management becomes more and more stringent, people are paying more and more attention to the comprehensive treatment technology of industrial smoke pollution. Bag dust removal technology is increasingly used in the field of industrial smoke treatment due to its high filtration efficiency and long service life.

[0003] The filter bags in the prior art are generally made of needle-punched felt, which not only has the advantages of glass fiber fabrics such as high temperature resistance, corrosion resistance, dimensional stability, extremely small elongation and shrinkage, and high strength, but also has single-fiber felt layer fibers, a three-dimensional microporous structure, high porosity, and low gas filtration resistance. It is a high-speed, high-efficiency high-temperature filter material. Compared with other high-temperature resistant chemical fiber felts, it has special advantages such as low price and higher temperature resistance, but its running resistance is higher than that of general chemical fiber high-temperature filter materials.

[0004] However, the filter bags in the prior art are generally used for single filtration, and the filtering effect is poor.

[0005] In addition, the filter bags in the prior art may cause ignition due to static electricity accumulated in the filter material, resulting in risks such as deflagration or even explosion. Summary of the invention

[0006] In view of the shortcomings of the prior art, the present invention provides an antistatic needle felt filter bag, which solves the problems of poor single filtration effect and static electricity ignition caused by filter material accumulation in the prior art.

[0007] To achieve the above purpose, the present invention is implemented through the following technical solutions: an antistatic needle felt filter bag, comprising: a primary needle felt filter bag, the primary needle felt filter bag is a tubular structure with both upper and lower ends sealed; a secondary needle felt filter bag, the secondary needle felt filter bag is located in the primary needle felt filter bag, the secondary needle felt filter bag is a tubular structure with both upper and lower ends open, the lower end opening of the secondary needle felt filter bag is provided with an opening and closing valve for blocking or opening the lower end opening of the secondary needle felt filter bag, the secondary needle felt filter bag is enclosed by a plurality of needle felt sheets arranged along the length direction of the primary needle felt filter bag, and there is a valve between two adjacent needle felt sheets There is an overlapping area, and the outer surfaces of the primary needle felt filter bag and the needle felt sheet are the filter material bonding surfaces; a flip structure, the flip structure is used to drive a single needle felt sheet to flip, so that the filter material bonding surface of the needle felt sheet is flipped to become the inner surface of the secondary needle felt filter bag; a pulse chamber, the pulse chamber is located between the primary needle felt filter bag and the secondary needle felt filter bag, and when pulse gas enters the pulse chamber, high-pressure gas can be sprayed on the primary needle felt filter bag and the secondary needle felt filter bag, so that the filter material bonded to the primary needle felt filter bag is discharged outward, and the filter material bonded to the needle felt sheet enters the secondary needle felt filter bag and is discharged from the area where the opening and closing valve is located after opening.

[0008] Furthermore, an outer frame is provided on the periphery of the needle-punched felt sheet, and the outer frame is used to maintain the shape of the needle-punched felt sheet.

[0009] Furthermore, the lower end seal of the first-level needle felt filter bag is set as a conductive base, and the conductive base is made of metal material; a grounding wire is provided on the conductive base, and the grounding wire extends to the ground.

[0010] Furthermore, the upper end seal of the first-level needle felt filter bag is set as an upper fixed seat, and an exhaust port is provided in the area where the upper end of the upper fixed seat is opposite to the upper end opening of the secondary needle felt filter bag; the flip structure is assembled in the upper fixed seat, and the flip structure includes: an upper gear, an upper shaft is fixedly provided in the middle part of the upper end of the needle felt sheet, and the upper gear is fixed on the upper shaft; a rotating ring, the rotating ring is located at the outer periphery of the upper end of the secondary needle felt filter bag, and a tooth portion is provided in the area where the inner wall of the rotating ring is opposite to the upper gear, and the rotation of the tooth portion is used to drive the upper gear to rotate, so as to flip the outer frame and the needle felt sheet.

[0011] Furthermore, an integral limiting ring is provided on the outer arc surface of the rotating ring, and the rotating ring is axially limited in the upper fixed seat by the limiting ring.

[0012] Furthermore, a waste outlet is provided in the area opposite to the lower end opening of the conductive base and the secondary needle felt filter bag, and the opening and closing valve is installed in the waste outlet, and the opening and closing valve comprises: a valve plate, a middle seat is provided at the center of the waste outlet, the middle seat is fixed to the conductive base through a fixing frame, an assembly shaft rod is radially provided on the middle seat, one end of the assembly shaft rod is rotatably mounted on the middle seat, and the other end is rotatably mounted on the conductive base, one side of the valve plate is fixed on the assembly shaft rod, and the valve plate is used to block the gap between two adjacent assembly shaft rods; a driving bevel gear, a lower shaft is fixedly provided at the middle part of the lower end of the outer frame, and the driving bevel gear is assembled on the lower shaft; a driven bevel gear, the driven bevel gear is fixed to one end of the assembly shaft rod close to the conductive base, and the driven bevel gear is meshed with the driving bevel gear.

[0013] Furthermore, it also includes a driving component, which is used to drive one of the upper gears to rotate. The driving component includes: a driving gear, which is fixed on one of the upper shafts; a moving plate, on which a rack portion is installed, and the rack portion is meshed with the driving gear; and a cylinder, which is used to push and pull the moving plate.

[0014] Furthermore, a pulse gas inlet is provided on one side of the conductive base opposite to the pulse chamber, and a pulse valve is installed on the pulse gas inlet; an exhaust pipe is installed on the exhaust port, and an exhaust valve is provided on the exhaust pipe. The exhaust valve is in a closed state during the pulse dust removal stage.

[0015] Furthermore, an integrated fixing ring is provided on the outside of the exhaust port, and a positioning hole is opened on the fixing ring for fixing the upper fixing seat to the dust removal device by bolts.

[0016] Furthermore, a vertical frame is fixedly provided on the upper surface of the conductive base, and metal rings are evenly spaced on the vertical frame. The metal rings and the vertical frame are used to conduct static electricity on the primary needle felt filter bag to the conductive base.

[0017] The present invention has the following beneficial effects:

[0018] (1) The antistatic needle felt filter bag, by providing a double-layer filter bag, can perform two filtrations on the one hand, thereby improving the filtration effect; on the other hand, the pore diameter of the first-level needle felt filter bag can be made larger, thereby reducing the wind resistance of the first-level needle felt filter bag and reducing the dust attached to the outside of the first-level needle felt filter bag.

[0019] (2) The antistatic needle felt filter bag uses multiple groups of needle felt sheets to form a secondary needle felt filter bag, and the needle felt sheets can be turned over so that the side that adheres to the dust is turned over to form the inner surface of the secondary needle felt filter bag, so that the two groups of filter bags can be cleaned simultaneously during the cleaning stage to maintain the continuous working performance of the two groups of filter bags.

[0020] (3) The antistatic needle felt filter bag can effectively remove static electricity on the filter bag by providing a conductive base and a grounding wire on the conductive base.

[0021] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0024] Figure 3 It is a top view of the secondary needle felt filter bag of the present invention;

[0025] Figure 4 This is a diagram showing the matching of the secondary needle felt filter bag and the upper gear of the present invention;

[0026] Figure 5 It is an assembly diagram of the outer frame and the needle-punched felt sheet of the present invention;

[0027] Figure 6 For the present invention Figure 3 A magnified image of area A;

[0028] Figure 7 For the present invention Figure 6 Schematic diagram of the outer frame after flipping in the state;

[0029] Figure 8 For the present invention Figure 4 A magnified view of area B;

[0030] Fig. 9 For the present invention Figure 2 Magnified image of area C;

[0031] Fig.10 For the present invention Figure 2 Bottom view of ;

[0032] Fig.11 For the present invention Fig.10 A magnified view of region D;

[0033] Fig.12 It is an assembly diagram of the outer frame and the conductive base of the present invention;

[0034] Fig.13 This is an opening diagram of the valve plate of the present invention;

[0035] Fig.14 It is an arrangement diagram of multiple antistatic needle felt filter bags of the present invention;

[0036] Fig.15 for Fig.14Magnified view of area E.

[0037] In the figure, 1, primary needle felt filter bag; 2, upper fixed seat; 21, exhaust port; 22, fixing ring; 23, positioning hole; 24, pulse gas inlet; 3, secondary needle felt filter bag; 31, outer frame; 32, needle felt sheet; 4, flip structure; 41, rotating ring; 42, upper gear; 43, tooth portion; 44, limit ring; 5, conductive base; 51, waste outlet; 6, opening and closing valve; 61, assembly shaft; 62, valve plate; 63, middle seat; 64, fixing frame; 65, active bevel gear; 66, driven bevel gear; 7, driving assembly; 71, active gear; 72, rack portion; 73, cylinder; 74, moving plate; 8, pulse tube; 9, pulse valve; 10, exhaust pipe; 11, exhaust valve; 12, pulse chamber; 13, metal ring; 14, grounding wire; 15, upper shaft; 16, lower shaft; 17, vertical frame. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] According to the following Figure 1-Figure 15 The antistatic needle felt filter bag provided by the embodiment of the present invention is described.

[0040] See also Figure 1 and Figure 2 As shown, an embodiment of the present invention provides an antistatic needle felt filter bag, comprising a primary needle felt filter bag 1 and a secondary needle felt filter bag 3. The dust-laden gas gradually approaches the primary needle felt filter bag 1 from the outside of the primary needle felt filter bag 1, and is filtered once by the primary needle felt filter bag 1. The filtered dust remains on the outer surface of the primary needle felt filter bag 1, and then the gas entering the primary needle felt filter bag 1 is filtered twice by the secondary needle felt filter bag 3. Filtering in this way has the following advantages: 1) The effect of the two filtrations is better; 2) The pore diameter of the primary needle felt filter bag 1 can be enlarged, thereby reducing the wind resistance of the primary needle felt filter bag 1 and reducing the dust attached to the outside of the primary needle felt filter bag 1.

[0041] Continue to refer to Figure 1 and Figure 2As shown, the primary needle felt filter bag 1 is a tubular structure with sealed upper and lower ends, thereby preventing the dust-laden gas entering the primary needle felt filter bag 1 from escaping from the upper and lower ends of the primary needle felt filter bag 1; the secondary needle felt filter bag 3 is a tubular structure with open upper and lower ends; the lower end opening of the secondary needle felt filter bag 3 is provided with an opening and closing valve 6 for blocking or opening the lower end opening of the secondary needle felt filter bag 3; in the dust removal stage, the opening and closing valve 6 closes the lower end opening of the secondary needle felt filter bag 3, so that the gas entering the secondary needle felt filter bag 3 can only be discharged from the top of the secondary needle felt filter bag 3.

[0042] Combination Figure 3-Figure 7 As shown, the secondary needle felt filter bag 3 here is enclosed by a plurality of needle felt sheets 32 arranged along the length direction of the primary needle felt filter bag 1, and there is an overlapping area between two adjacent needle felt sheets 32. The overlapping area is used to seal the two adjacent needle felt sheets 32 to prevent gas from escaping between the two needle felt sheets 32, so that if the gas wants to enter the secondary needle felt filter bag 3 from the primary needle felt filter bag 1, it must be filtered by the needle felt sheet 32. Therefore, the outer surfaces of the primary needle felt filter bag 1 and the needle felt sheet 32 ​​are both filter material bonding surfaces, and the filter material is the filtered dust.

[0043] Combination Figure 2-Figure 4 as well as Figure 8 As shown, in order to facilitate the synchronous cleaning of the primary needle felt filter bag 1 and the secondary needle felt filter bag 3, a pulse chamber 12 is provided between the primary needle felt filter bag 1 and the secondary needle felt filter bag 3, and a flip structure 4 is also provided. Before pulse cleaning, it is necessary to first use the flip structure 4 to flip each needle felt sheet 32 ​​so that the filter material bonding surface of the needle felt sheet 32 ​​is flipped to become the inner surface of the secondary needle felt filter bag 3. At this time, pulse high-pressure gas is sprayed into the pulse chamber 12, so that the filter material bonded to the primary needle felt filter bag 1 can be discharged outwardly, and the filter material bonded to the needle felt sheet 32 ​​can enter the secondary needle felt filter bag 3. Of course, in the cleaning stage, the opening and closing valve 6 is in an open state, so that the dust in the secondary needle felt filter bag 3 can be discharged.

[0044] Therefore, the antistatic needle felt filter bag provided in the embodiment of the present invention can not only realize secondary filtration, but also simultaneously clean two groups of filter bags to maintain the working performance of the two groups of filter bags.

[0045] Preferably, an outer frame 31 is provided on the periphery of the needle-punched felt sheet 32, and the outer frame 31 is used to maintain the shape of the needle-punched felt sheet 32, to prevent the needle-punched felt sheet 32 ​​from being subjected to the action of air pressure and having an overall position deviation, thereby maintaining its filtering performance. Preferably, the outer frame 31 is made of stainless steel.

[0046] like Figure 1The lower end of the primary needle felt filter bag 1 is sealed with a conductive base 5, which is made of metal material and is in a ring shape between the primary needle felt filter bag 1 and the secondary needle felt filter bag 3. The conductive base 5 is provided with a grounding wire 14, which extends to the ground, thereby eliminating the static electricity of the primary needle felt filter bag 1. In addition, the outer frame 31 can conduct the static electricity on the needle felt sheet 32 ​​to the conductive base 5, thereby eliminating the static electricity on the needle felt sheet 32. Further, a vertical frame 17 is fixedly provided on the upper surface of the conductive base 5, and metal rings 13 are provided on the vertical frame 17 at equal intervals. The metal rings 13 and the vertical frame 17 are used to conduct the static electricity on the primary needle felt filter bag 1 to the conductive base 5.

[0047] Combination Figure 1 and Figure 2 As shown, the upper end of the primary needle felt filter bag 1 is sealed by an upper fixing seat 2, and an exhaust port 21 is provided in the area at the upper end of the upper fixing seat 2 opposite to the upper end opening of the secondary needle felt filter bag 3, for discharging the gas after secondary filtration out of the secondary needle felt filter bag 3.

[0048] The flip structure 4 is assembled in the upper fixed seat 2. The flip structure 4 includes an upper gear 42 and a rotating ring 41. An upper shaft 15 is fixedly arranged in the middle of the upper end of the needle felt sheet 32. In fact, the upper shaft 15 is integrally formed with the outer frame 31. The upper gear 42 is fixed on the upper shaft 15. The rotating ring 41 is located at the outer periphery of the upper end of the secondary needle felt filter bag 3, and a tooth portion 43 is arranged in the area of ​​the inner wall of the rotating ring 41 opposite to the upper gear 42. The tooth portion 43 is meshed with the upper gear 42. When the rotating ring 41 rotates, the tooth portion 43 can be driven to rotate. The rotation of the tooth portion 43 is used to drive the upper gear 42 to rotate, so that the outer frame 31 and the needle felt sheet 32 ​​are flipped. After flipping, the inner and outer surfaces can be exchanged. Figure 7 for Figure 6 Schematic diagram of the inner and outer frames 31 and the needle-punched felt sheet 32 ​​after being turned over.

[0049] Combination Figure 2 and Fig. 9 As shown, preferably, an integral limiting ring 44 is provided on the outer arc surface of the rotating ring 41, and the rotating ring 41 is axially limited in the upper fixed seat 2 by the limiting ring 44, so that the entire flip structure 4 is limited in the upper fixed seat 2. The inner wall of the upper fixed seat 2 is provided with an annular groove that cooperates with the limiting ring 44.

[0050] Reference Figure 10-13As shown, a waste outlet 51 is provided in the area where the conductive base 5 is opposite to the lower end opening of the secondary needle felt filter bag 3, and an on-off valve 6 is installed in the waste outlet 51. The on-off valve 6 includes a middle seat 63 arranged at the center of the waste outlet 51, and the middle seat 63 is fixed on the conductive base 5 through a fixing frame 64, so that the middle seat 63 is in a fixed state, and a plurality of assembly shaft rods 61 are radially provided on the middle seat 63, one end of the assembly shaft rod 61 is rotatably mounted on the middle seat 63, and the other end is rotatably mounted on the conductive base 5, that is, the assembly shaft rod 61 is in a rotatable state, and a valve plate 62 is fixed on the assembly shaft rod 61, and the valve plate 62 is used to block the gap between two adjacent assembly shaft rods 61, so that in the filtering stage, the gas entering the secondary needle felt filter bag 3 can only be discharged from the top, and cannot be discharged from the position of the valve plate 62.

[0051] In order to discharge dust from the waste outlet 51 during the cleaning stage, a driving bevel gear 65 and a driven bevel gear 66 are also provided. A lower shaft 16 is fixed to the middle part of the lower end of the outer frame 31. The driving bevel gear 65 is fixed on the lower shaft 16, and the driven bevel gear 66 is fixed to the end of the assembly shaft 61 close to the conductive base 5. The driven bevel gear 66 is meshed with the driving bevel gear 65, so that the driving bevel gear 65 can be driven to rotate when the outer frame 31 is flipped, and the driving bevel gear 65 can drive the driven bevel gear 66 to rotate. Preferably, the diameter ratio of the driving bevel gear 65 and the driven bevel gear 66 should be that the driving bevel gear 65 rotates 170° and the driven bevel gear 66 rotates 90°.

[0052] like Fig.14 In order to realize the rotation of the rotating ring 41, a driving assembly 7 is also provided here. The driving assembly 7 is used to drive one of the upper gears 42 to rotate. The driving assembly 7 includes a driving gear 71, a moving plate 74 and a cylinder 73. The driving gear 71 is fixed on one of the upper shafts 15. A rack portion 72 is installed on the moving plate 74. The rack portion 72 is meshed with the driving gear 71. The cylinder 73 is used to push and pull the moving plate 74.

[0053] In this embodiment, when the cylinder 73 pushes the movable plate 74, its rack portion 72 can drive the driving gear 71 to rotate, thereby driving one of the upper gears 42 to rotate, and then the rotating ring 41 rotates. When the rotating ring 41 rotates, it can drive all the upper gears 42 to rotate, thereby realizing the flipping of all the needle-punched felt sheets 32.

[0054] It should be noted that when installing filter bags, they are generally installed in groups, such as Fig.14 In the state shown, the movable plate 74 can be set longer, so that the upper gears 42 on all the filter bags can be driven to work using a single cylinder 73.

[0055] like Figure 1 , Fig.14 and Fig.15Preferably, a pulse gas inlet 24 is provided on the side of the conductive base 5 opposite to the pulse chamber 12, and a pulse valve 9 is installed on the pulse gas inlet 24. When the pulse valve 9 is working, the external external gas enters the pulse chamber 12 through the pulse gas inlet 24. An exhaust pipe 10 is installed on the exhaust port 21, and an exhaust valve 11 is provided on the exhaust pipe 10. The exhaust valve 11 is closed during the pulse dust removal stage.

[0056] like Figure 1 and Figure 2 An integrated fixing ring 22 is disposed outside the upper fixing seat 2, and a positioning hole 23 is opened on the fixing ring 22 for fixing the upper fixing seat 2 on the dust removal device by bolts.

[0057] During operation, 1) in the dust removal stage, the valve plate 62 is in a closed state, the pulse valve 9 is in a non-working state, and the exhaust valve 11 is in an open state. The dust-carrying gas gradually approaches the primary needle felt filter bag 1 from the periphery of the primary needle felt filter bag 1 and is filtered by the primary needle felt filter bag 1. Part of the dust remains on the outer surface of the primary needle felt filter bag 1, and the other part of the dust enters the secondary needle felt filter bag 3 together with the gas, and is filtered for the second time by the needle felt sheet 32. After the secondary filtration, the dust remains on the outer surface of the needle felt sheet 32, and the clean air enters the secondary needle felt filter bag 3. Then the clean gas is discharged from the top of the secondary needle felt filter bag 3 and enters the exhaust pipe 10.

[0058] 2) In the dust cleaning stage, the control cylinder 73 is extended. When the cylinder 73 pushes the movable plate 74, its rack portion 72 can drive the driving gear 71 to rotate, thereby driving one of the upper gears 42 to rotate, and then the rotating ring 41 rotates. When the rotating ring 41 rotates, it can drive all the upper gears 42 to rotate, so as to realize the flipping of all the needle felt sheets 32, so that the dust-carrying side of the needle felt sheets 32 serves as the inner surface of the secondary needle felt filter bag 3. At the same time, when the needle felt sheets 32 flip, the lower shaft 16 below it can drive the driving bevel gear 65 to rotate, and the driving bevel gear 65 can drive the driven bevel gear 66 to rotate, so that the assembly shaft 61 can rotate to open the valve plate 62.

[0059] Then, the pulse valve 9 is controlled to open and the exhaust valve 11 is closed, and the pulse gas enters the interior of the pulse chamber 12 through the pulse tube 8. The high-pressure gas can provide gas pressure to the primary needle felt filter bag 1 and the secondary needle felt filter bag 3, so that the dust on the outer surface of the primary needle felt filter bag 1 can be separated from the primary needle felt filter bag 1 outward, and the dust on the secondary needle felt filter bag 3 can be blown into the interior of the secondary needle felt filter bag 3 and discharged from the opened part of the valve plate 62.

Claims

1. Antistatic needle felt filter bag, characterized in that: include: A first-stage needle felt filter bag (1), wherein the first-stage needle felt filter bag (1) is a tubular structure with sealed upper and lower ends; A secondary needle felt filter bag (3), the secondary needle felt filter bag (3) being located inside the primary needle felt filter bag (1), the secondary needle felt filter bag (3) being a tubular structure with openings at both the upper and lower ends, the lower end opening of the secondary needle felt filter bag (3) being provided with an opening and closing valve (6) for blocking or opening the lower end opening of the secondary needle felt filter bag (3), the secondary needle felt filter bag (3) being enclosed by a plurality of needle felt sheets (32) arranged along the length direction of the primary needle felt filter bag (1), an overlapping area being provided between two adjacent needle felt sheets (32), and the outer surfaces of the primary needle felt filter bag (1) and the needle felt sheets (32) being filter material bonding surfaces; A turning structure (4), the turning structure (4) being used to drive a single needle felt sheet (32) to turn over, so that the filter material bonding surface of the needle felt sheet (32) turns over to become the inner surface of the secondary needle felt filter bag (3); A pulse chamber (12), wherein the pulse chamber (12) is located between the primary needle felt filter bag (1) and the secondary needle felt filter bag (3), and when pulse gas enters the pulse chamber (12), high-pressure gas can be sprayed onto the primary needle felt filter bag (1) and the secondary needle felt filter bag (3), so that filter material adhered to the primary needle felt filter bag (1) is discharged outwardly, and filter material adhered to the needle felt sheet (32) enters the secondary needle felt filter bag (3) and is discharged from the area where the on-off valve (6) is opened.

2. The antistatic needle felt filter bag according to claim 1, characterized in that: An outer frame (31) is provided on the periphery of the needle-punched felt sheet (32), and the outer frame (31) is used to maintain the shape of the needle-punched felt sheet (32).

3. The antistatic needle felt filter bag according to claim 2 is characterized in that: The lower end seal of the primary needle felt filter bag (1) is arranged as a conductive base (5), and the conductive base (5) is made of a metal material; A grounding wire (14) is provided on the conductive base (5), and the grounding wire (14) extends to the ground.

4. The antistatic needle felt filter bag according to claim 3 is characterized in that: The upper end seal of the primary needle felt filter bag (1) is arranged as an upper fixing seat (2), and an exhaust port (21) is arranged in the area where the upper end of the upper fixing seat (2) and the upper end opening of the secondary needle felt filter bag (3) are opposite; The flip structure (4) is assembled in the upper fixed seat (2), and the flip structure (4) comprises: An upper gear (42), an upper shaft (15) is fixedly provided at the middle of the upper end of the needle-punched felt sheet (32), and the upper gear (42) is fixed on the upper shaft (15); A rotating ring (41) is located on the periphery of the upper end of the secondary needle felt filter bag (3), and a tooth portion (43) is provided in an area of ​​the inner wall of the rotating ring (41) opposite to the upper gear (42), wherein the tooth portion (43) rotates to drive the upper gear (42) to rotate, thereby turning the outer frame (31) and the needle felt sheet (32).

5. The antistatic needle felt filter bag according to claim 4 is characterized in that: An integral limiting ring (44) is provided on the outer arc surface of the rotating ring (41), and the rotating ring (41) is axially limited in the upper fixed seat (2) by the limiting ring (44).

6. The antistatic needle felt filter bag according to claim 4, characterized in that: A waste outlet (51) is provided in the area of ​​the conductive base (5) opposite to the lower end opening of the secondary needle felt filter bag (3), and the on-off valve (6) is installed in the waste outlet (51). The on-off valve (6) comprises: A valve plate (62), wherein a middle seat (63) is provided at the center of the waste outlet (51), the middle seat (63) being fixed to the conductive base (5) via a fixing frame (64), a plurality of assembly shafts (61) being radially provided on the middle seat (63), one end of the assembly shaft (61) being rotatably mounted on the middle seat (63), and the other end of the assembly shaft (61) being rotatably mounted on the conductive base (5), one side of the valve plate (62) being fixed to the assembly shaft (61), and the valve plate (62) being used to block a gap between two adjacent assembly shafts (61); A driving bevel gear (65), wherein a lower shaft (16) is fixedly provided at the middle portion of the lower end of the outer frame (31), and the driving bevel gear (65) is assembled on the lower shaft (16); A driven bevel gear (66) is fixed to one end of the assembly shaft (61) close to the conductive base (5), and the driven bevel gear (66) is meshed with the driving bevel gear (65).

7. The antistatic needle felt filter bag according to claim 4, characterized in that: It also includes a driving assembly (7), wherein the driving assembly (7) is used to drive one of the upper gears (42) to rotate, and the driving assembly (7) includes: A driving gear (71), wherein the driving gear (71) is fixed on one of the upper shafts (15); A movable plate (74), wherein a rack portion (72) is mounted on the movable plate (74), and the rack portion (72) is meshed with a driving gear (71); A cylinder (73), wherein the cylinder (73) is used to push and pull the moving plate (74).

8. The antistatic needle felt filter bag according to claim 7, characterized in that: A pulse gas inlet (24) is provided on one side of the conductive base (5) in an area opposite to the pulse chamber (12), and a pulse valve (9) is installed on the pulse gas inlet (24); An exhaust pipe (10) is installed on the exhaust port (21), and an exhaust valve (11) is provided on the exhaust pipe (10). The exhaust valve (11) is in a closed state during the pulse dust removal stage.

9. The antistatic needle felt filter bag according to claim 8, characterized in that: An integral fixing ring (22) is provided on the outside of the exhaust port (21), and a positioning hole (23) is provided on the fixing ring (22) for fixing the upper fixing seat (2) to the dust removal device by means of bolts.

10. The antistatic needle felt filter bag according to claim 3, characterized in that: A vertical frame (17) is fixedly provided on the upper surface of the conductive base (5), and metal rings (13) are provided on the vertical frame (17) at equal intervals. The metal rings (13) and the vertical frame (17) are used to conduct static electricity on the primary needle felt filter bag (1) to the conductive base (5).

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