Quick dismounting structure of non-woven fabric filter bag and non-woven fabric filter bag thereof

Abstract

The application discloses a quick dismounting structure of a non-woven fabric filter bag and the non-woven fabric filter bag, and belongs to the technical field of filtering and separating equipment, and comprises a partition plate, a plurality of through holes are formed in the partition plate, a plurality of dismounting structures are arranged at the bottom of the partition plate, the dismounting structures are inserted into the through holes, a group of square holes and round holes are formed in the outer wall of the through hole, the square holes are communicated with the round holes, a clamping mechanism is arranged in the square hole, the dismounting structure comprises a fixing mechanism and an inner supporting mechanism, the fixing mechanism is arranged on the inner supporting mechanism, and the fixing mechanism is arranged in cooperation with the clamping mechanism, when the inner supporting mechanism is dismounted from the partition plate, the filter bag and the inner supporting mechanism are automatically unlocked, the speed of dismounting the dismounting structure from the partition plate is greatly improved, and the operation is simple, time-saving and labor-saving.

Description

Technical Field

[0001] This invention relates to the field of filtration and separation equipment technology, specifically to a quick-disassembly structure for a nonwoven filter bag and the nonwoven filter bag thereof. Background Technology

[0002] Non-woven filter bags are a type of bag structure used in baghouse dust collectors for filtration and separation. The baghouse dust collector divides its interior into a dust collection chamber and a clean air chamber via a partition. The filter bags are fitted onto a disassembly structure, which is fixed to the bottom of the partition and connected to it. When dust-laden airflow enters the housing, clean airflow passes through the non-woven filter bags into the disassembly structure, then through the disassembly structure into the clean air chamber at the top of the partition, and is discharged externally. Dust is trapped outside the filter bags, achieving separation of airflow and dust. The disassembly structure includes a fixing component and an internal filter bag support frame (also known as a filter bag frame) connected to the bottom of the fixing component. The filter bags are fitted onto the internal filter bag support frame, which is a cylindrical mesh structure used to internally support the filter bags and keep them in place. The filter bags are cylindrical to prevent deformation due to airflow, which would affect dust interception. After prolonged use, filter bags may break and require replacement. While they can intercept dust in the airflow, extremely fine dust particles can still pass through and adhere to the internal support frame, clogging the frame's pores. Therefore, when disassembling, replacing, or repairing the filter bag, the internal support frame also needs to be disassembled and cleaned. The disassembly mechanism is typically connected to a partition for easy removal, allowing the filter bag to be removed from the mechanism. However, current technology requires unlocking the disassembly mechanism from the partition before removing the filter bag, which is not only slow but also cumbersome. Summary of the Invention

[0003] To address the technical problems mentioned in the background section, this invention provides a quick-disassembly structure for nonwoven filter bags, employing the following technical solution:

[0004] It includes a partition with several through holes and several disassembly structures at the bottom of the partition. The disassembly structures are inserted into the through holes. The outer wall of the through holes has a set of square holes and round holes, which are connected. A snap-fit ​​mechanism is provided in the square hole. The disassembly structure includes a fixing mechanism and an inner support mechanism. The fixing mechanism is provided on the inner support mechanism. The fixing mechanism and the snap-fit ​​mechanism are configured to cooperate with each other.

[0005] Furthermore, the snap-fit ​​mechanism includes a square strip movably connected within the square hole. One end of the square strip is arc-shaped and extends to the outside of the square hole. A round rod is movably connected to both the square hole and the round hole. One end of the round rod is fixedly connected to the end of the square strip. A spring a is provided inside the square hole. The spring a is sleeved on the round rod. One end of the spring a is fixedly connected to the outer end of the round hole, and the other end is fixedly connected to the end of the square strip.

[0006] Furthermore, the internal support mechanism includes a head with a hollow internal structure, a through pipe fixedly connected to the upper part of the head, the through pipe communicating with the head, a fixing mechanism on the through pipe, an annular groove on the upper part of the head, and a filter bag internal support frame fixedly connected to the bottom of the head.

[0007] Furthermore, the fixing mechanism includes a pressing component, a wedge ring, and a toggle component respectively arranged from top to bottom on the through pipe. The wedge ring is sleeved and fixed on the through pipe. The inside of the wedge ring is hollow, the outside is an arc surface, and the bottom is a flat surface.

[0008] Furthermore, the pressing component includes a ring fixed in the through hole, the ring being movably sleeved on the through tube, and a set of limiting holes opened at the bottom of the ring. It also includes a pressure ring movably sleeved on the through tube, and a set of cylinders fixedly connected to the pressure ring. The upper end of the cylinders is movably inserted into the limiting holes, and a spring b is sleeved on the cylinders. The upper end of the spring b is fixedly connected to the bottom of the ring, and the lower part is fixedly connected to the upper part of the pressure ring.

[0009] Furthermore, the actuating component includes a conical ring movably fitted onto the through pipe. The upper and lower parts of the conical ring are flat, and the sides are arc-shaped cones. A set of springs c are fixedly connected to the bottom of the conical ring. The bottom of springs c is fixed to the upper part of the end cap. The elastic force of spring b is greater than that of spring a, and the elastic force of spring a is greater than that of spring c. The component also includes an insert ring fixed to the bottom of the conical ring. The bottom of the insert ring is movably inserted into the annular groove.

[0010] Furthermore, it includes a filter bag body, with an elastic opening connected to the upper part of the filter bag body, and an elastic cord connected to the end of the elastic opening.

[0011] Furthermore, the filter bag body is fitted onto the inner support frame of the filter bag, and the elastic opening and the annular elastic rope are fitted onto the end cap.

[0012] The present invention has the following advantages:

[0013] When the disassembly structure needs to be removed from the partition, simply lift the bottom of the inner support mechanism by hand, causing it to move part of the fixing mechanism upwards. With the cooperation of the locking mechanism, the inner support mechanism and part of the fixing mechanism can be unlocked. Then, while still holding the inner support mechanism without applying force, it will be lowered by its own weight and the elastic force of the disassembly structure. When the upper end of the inner support mechanism disengages from the bottom of the through hole, the disassembly structure and the partition, as well as the disassembly structure and the filter bag, will automatically unlock. After unlocking, the filter bag can be pulled directly off the disassembly structure. There is no need for workers to add the step of unlocking the disassembly structure and the filter bag before pulling the filter bag off. This invention automatically unlocks the filter bag and the inner support mechanism when disassembling the inner support mechanism from the partition, greatly improving the speed of disassembling the disassembly structure from the partition. It is also simple to operate and saves time and effort.

[0014] When the inner support mechanism is installed on the partition, there is no need for a limiting mechanism to align it. Simply lift the inner support mechanism up and insert it into the through hole, and with the locking mechanism, the inner support mechanism can be locked and fixed to the partition. Attached Figure Description

[0015] Figure 1 This is an exploded view of the partition and disassembly structure of the present invention;

[0016] Figure 2 This is an assembly diagram of the partition and disassembly structure of the present invention;

[0017] Figure 3 For the present invention from Figure 2 An assembly diagram of a single disassembled structure and partition, taken from the middle;

[0018] Figure 4 For the present invention Figure 3 Image showing the partition after it has been cut open;

[0019] Figure 5 For the present invention Figure 4 Enlarged view of section a (extracted from the image);

[0020] Figure 6 For the present invention Figure 3 Overall sectional view;

[0021] Figure 7 For the present invention Figure 6 A magnified view of section b taken from the image;

[0022] Figure 8 For the present invention Figure 4 Schematic diagram showing the separation of the filter bag from the disassembly structure after removing the insert ring;

[0023] Figure 9 For the present invention Figure 8 A magnified view of point c, taken from the middle;

[0024] Figure 10 For the present invention Figure 8 Enlarged view of point d extracted from the image;

[0025] Figure 11 This is a schematic diagram of the disassembly structure and the partition plate before installation of the present invention;

[0026] Figure 12 For the present invention Figure 11 An enlarged view of point e, taken from the image.

[0027] Attached Figures: 1. Partition plate, 2. Disassembly structure, 3. Through hole, 4. Square hole, 5. Round hole, 6. Square bar, 7. Round rod, 8. Spring a, 9. End cap, 10. Through pipe, 11. Annular groove, 12. Filter bag inner support frame, 13. Wedge ring, 14. Circular ring, 15. Limiting hole, 16. Pressure ring, 17. Cylindrical ring, 18. Spring b, 19. Conical ring, 20. Spring c, 21. Insert ring, 22. Filter bag body, 23. Elastic opening, 24. Annular elastic rope. Detailed Implementation

[0028] 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.

[0029] Please refer to Figure 1-12 This invention provides a quick-disassembly structure for non-woven filter bags, including a partition 1 welded inside a bag filter dust collector, dividing the interior of the dust collector into a clean air chamber and a dust collection chamber. The partition 1 has several through holes 2, and several disassembly structures 2 are provided at the bottom of the partition 1. The disassembly structures 2 are inserted into the through holes 3, and the through holes are used to install the disassembly structures. When dust-laden airflow enters the bag filter dust collector, the dust is intercepted outside the disassembly structures, and the clean airflow enters the interior of the disassembly structures and then enters the upper part of the partition 1. The clean air chamber is then discharged. A set of square holes 4 and round holes 5 are opened on the outer wall of the through hole 3. The square holes 4 and round holes 5 are connected. A snap-fit ​​mechanism is provided in the square hole 4. The snap-fit ​​mechanism moves in the square hole 4 and round hole 5. The disassembly structure 2 includes a fixing mechanism and an inner support mechanism. The fixing mechanism is provided on the inner support mechanism. The fixing mechanism and the snap-fit ​​mechanism are configured to cooperate. When the inner support mechanism moves up and down, it drives the fixing mechanism to move up and down. Then, the snap-fit ​​mechanism is used to lock and fix the disassembly structure with the partition 1 or unlock and separate the disassembly structure from the filter bag.

[0030] The snap-fit ​​mechanism includes a square bar 6 movably connected within a square hole 4. One end of the square bar 6 is arc-shaped and extends to the outside of the square hole 4. A round rod 7 is movably connected to both the square hole 4 and the round hole 5. One end of the round rod 7 is fixedly connected to the end of the square bar 6. A spring a8 is provided inside the square hole 4 and is sleeved on the round rod 7. One end of the spring a8 is fixedly connected to the outer end of the round hole 5, and the other end is fixedly connected to the end of the square bar 6. When the square bar 6 moves closer to the round hole 5 within the square hole 4, it drives the round rod 7 to move within the round hole 5, compressing the spring a8.

[0031] The internal support mechanism includes a hollow end cap 9, which is frustum-shaped, meaning the diameter of the upper circular surface is smaller than the diameter of the bottom circular surface. A through pipe 10 is fixedly connected to the upper part of the end cap 9, and the through pipe 10 is connected to the end cap 9. A fixing mechanism is provided on the through pipe 10. An annular groove 11 is opened on the upper part of the end cap 9, and a filter bag inner support frame 12 is fixedly connected to the bottom of the end cap 9. The airflow in the bag filter enters the filter bag inner support frame 12 after passing through the filter bag, and flows upward. It then enters the clean air chamber at the top of the partition plate 1 through the end cap 9 and the through pipe 10.

[0032] The fixing mechanism includes a pressing member, a wedge ring 13, and a toggle member respectively arranged from top to bottom on the through pipe 10. The wedge ring 13 is sleeved and fixed on the through pipe 10. The pressing member elastically presses the wedge ring. The wedge ring 13 and the toggle member are arranged to cooperate with the square bar 6. The upper end of the larger toggle member can be movably inserted into the inside of the wedge ring 13. The inside of the wedge ring 13 is hollow, the outside is an arc surface, and the bottom is a flat surface.

[0033] The pressing component includes a ring 14 fixed in the through hole 3, which is movably sleeved on the through pipe 10. A set of limiting holes 15 are provided at the bottom of the ring 14. It also includes a pressure ring 16 movably sleeved on the through pipe 10. A set of cylinders 17 are fixedly connected to the pressure ring 16. The upper end of the cylinders 17 is movably inserted into the limiting holes 15. A spring b18 is sleeved on the cylinders 17. The upper end of the spring b18 is fixedly connected to the bottom of the ring 14, and the lower part is fixedly connected to the upper part of the pressure ring 16. When the pressure ring 16 is pushed up, the pressure ring 16 drives the cylinders 17 to rise in the limiting holes 15, and the spring b18 is compressed.

[0034] The actuating component includes a conical ring 19 movably sleeved on the through pipe 10. The upper and lower parts of the conical ring 19 are flat, and the sides are arc-shaped conical. The upper and lower parts of the sides are arc-shaped surfaces. A set of springs c20 is fixedly connected to the bottom of the conical ring 19. The bottom of the springs c20 is fixed to the upper part of the end cap 9. Through the connection of the springs c20, the conical ring 19 is limited and connected to the through pipe 10. The elastic force of spring b18 is greater than that of spring a8, and the elastic force of spring a8 is greater than that of spring c20. It also includes an insert ring 21 fixed to the bottom of the conical ring 19. The bottom of the insert ring 21 is movably inserted into the annular groove 11. When the conical ring 19 moves up and down, it drives the insert ring 21 to move up and down.

[0035] The inner diameter of the annular holes of wedge ring 13, circular ring 14, pressure ring 16, and conical ring 19 is the same as the outer diameter of the through pipe 10.

[0036] The upper part of the filter bag body 22 is connected to an elastic opening 23, and the end of the elastic opening 23 is connected to an annular elastic rope 24. The elastic opening 23 is opened by hand, and then it is put on the inner support frame 12 of the filter bag from bottom to top. The filter bag body 22 is attached to the inner support frame 12 of the filter bag, the elastic opening 23 shrinks and is attached to the end cap 9, and the annular elastic rope 24 is put on the end cap 9.

[0037] Working principle of the invention:

[0038] Filter bag installation process: Please refer to Figure 11-12 With the disassembly structure 2 and partition 1 separated, one worker holds the through pipe 10 in place, then lifts the bottom of the conical ring 19 by hand, causing it to slide upwards on the through pipe 10. The conical ring 19 drives the insert ring 21 to rise, creating a gap between the insert ring 21 and the end cap 9, stretching the spring c20. Another worker opens the tension opening 23 by hand, then slips it onto the filter bag inner support 12 and the end cap 9 from bottom to top. The filter bag body 22 fits against the filter bag inner support 12, and the tension opening 23 contracts and fits against the end cap 9. The annular tension rope 24 is looped onto the end cap 9, positioned between the insert ring 21 and the spring c20. Then the first worker... Release the hand that lifted the conical ring 19, the spring c20 rebounds, the conical ring 19 and the insert ring 21 descend, the conical ring 10 presses the tightening port 23 and drives the tightening port 23 to be inserted into the annular groove 11, so that the tightening port 23 is fixed on the end cap 9, and the filter bag body 22 is fixedly sleeved on the filter bag inner support 12. In this way, the filter bag is installed on the filter bag inner support 12, and the annular elastic rope 24 is blocked in the side of the annular groove 11 and the insert ring 21, and is stuck here, to prevent the filter bag body 22 from being overloaded with dust during long-term dust interception, and the excessive dust adhering to the outside of the filter bag body 22, which increases the weight of the filter bag body 22 and causes the filter bag body 22 to detach from the pressing of the insert ring 21 and detach from the filter bag inner support 12.

[0039] The process of disassembling structure 2 and installing it on partition 1: After the filter bag is installed on the filter bag inner support 12, hold the bottom of the filter bag body 22 by hand and lift it upwards, so that the through pipe 10 is inserted into the through hole 3. The wedge ring 13, conical ring 19, end cap 9 and filter bag inner support 12 enter the through hole 3 from bottom to top in turn. The arc-shaped surface of the upper side of the wedge ring 13 contacts the bottom of the arc-shaped end face of the square bar 6. Since the force of the hand lifting is greater than the elastic force of spring a8 and spring b18, when the wedge ring 13 continues to rise, the square bar 6 moves horizontally towards the round hole 5 in the square hole 4. As the square bar 6 moves, it drives the round rod 7 to move within the round hole 5. Spring a8 is compressed, and the upper part of the wedge ring 13 pushes against the bottom of the pressure ring 16. The pressure ring 16 drives the cylinder 17 to rise within the limiting hole 15. Spring b18 is compressed. When the outermost end of the square bar 6 contacts the outermost end of the wedge ring 13, and the wedge ring 13 continues to rise, the square bar 6 disengages from the wedge ring 13. Spring a8 rebounds and drives the square bar 6 to move away from the round hole 5 within the square hole 4. The square bar 6 moves to the bottom of the wedge ring 13, and the bottom of the wedge ring 13 abuts against the upper part of the square bar 6. Figure 5 As shown, when you release your hand, the wedge ring 13 is clamped and locked by the pressure ring 16 and the wedge ring 13. The entire disassembly structure is fixed on the partition plate 1, and the upper part of the filter bag inner support 12 is located at the bottom of the through hole 3, and a seal is formed between the filter bag body 22 and the through hole 3.

[0040] The disassembly process from partition 1: Lift the bottom of the filter bag body 22 by hand. The internal support 12, end cap 9, conical ring 19, wedge ring 13, and pressure ring 16 all move upwards. When the arc-shaped surface of the upper side of the conical ring 19 contacts the bottom of the arc-shaped end face of the square bar 6, because the insert ring 21 is inserted into the annular groove 11, when the wedge ring 13 moves upwards and contacts the bottom of the square bar 6, the square bar 6 moves towards the end closer to the round hole 5 within the square hole 4, and the spring a8 is compressed. When the conical ring 19 moves to the outermost end of the square bar 6 and contacts the outermost end of the conical ring 19, as the conical ring 19 continues to rise, the conical ring... The upper side of the conical ring 19 disengages from the square bar 6, and the spring a8 rebounds, causing the square bar 6 to move back and abut against the arc-shaped surface of the lower side of the conical ring 19. Then, the hand only supports the bottom of the filter bag body 22, and the hand slowly lowers along with the entire disassembly structure under its own weight and the elastic force of the spring b18. During the descent, because the elastic force of the spring a8 is greater than that of the spring c20, the lower side of the conical ring 19 remains relatively stationary, held against the square bar 6, while the filter bag body 22, the filter bag inner support 12, the wedge ring 13, and the pressure ring 16 continue to descend. Since the wedge ring 13 has a hollow internal structure, after descent, the wedge... The wedge-shaped ring 13 engages with the upper half of the conical ring 19. The side of the wedge-shaped ring 13 and the lower side of the conical ring 19 combine to form a new arc-shaped cone (the wedge-shaped ring 13 and the conical ring 19 have the same diameter). During this process, since the internal support 12, end cap 9, and through pipe 10 of the filter bag are all descending, while the conical ring 19 does not move, the spring c20 is stretched, and the insert ring 21 does not move. Therefore, the insert ring 21 disengages from the annular groove 11, and the tensioning port 23 disengages from the insert ring 21. The tensioning port 23 loses the locking of the insert ring 21, realizing that the insert ring 21 automatically unlocks from the tensioning port 23 while the disassembly structure and the partition 1 are being disassembled. The elastic opening 23 and the end cap 9 also partially disengage from the through hole 3 (allowing the annular elastic rope 24 to pass through the gap between the elastic opening 23 and the through hole 3). With the worker's other hand, simply pulling down the side of the filter bag body 22 will cause the elastic opening 23 and the annular elastic rope 24 to slide down onto the filter bag's inner support frame 12. After this descent, when the wedge ring 13 engages with the upper part of the conical ring 19, because the elastic force of spring b18 is greater than that of spring a8, spring b18 overcomes the elastic force of spring a8. Subsequently, the pressure ring 16 presses down on the upper part of the wedge ring 13, causing it to continue descending and engaging with the upper part of the conical ring 19.The conical ring 19 descends together with the square bar 6, with its lower side abutting against the square bar 6, causing the square bar 6 to move closer to the circular hole 5. This continues until the outermost ends of the conical ring 19 and wedge ring 13 contact the outermost end of the square bar 6. As the wedge ring 13 continues to descend, spring a8 rebounds, and the end of the square bar 6 abuts against the upper side of the wedge ring 13 and disengages from the conical ring 19. The conical ring 19 is then unrestrained, spring c20 rebounds, and the conical ring 19 and insert ring 21 descend on the through pipe 10. The insert ring 21 re-inserts into the annular groove without the filter bag body 22. As the wedge ring 13 continues to descend, the square bar 6 also disengages from the wedge ring 13. The entire disassembly structure is then unlocked and removed from the partition 1. Since the tightening port 23 has disengaged from the locking of the end cap 9 during the above process, it is only necessary to pull the filter bag body 22 off the filter bag inner support 12.

[0041] It is worth noting that the improvement of the technical solution of the present invention lies in the disassembly of the disassembly structure from the partition 1, while the above description of the filter bag installation process and the disassembly structure 2 installation process on the partition 1 is for reference only.

[0042] This invention is simple to operate, convenient to use, and suitable for widespread promotion and application. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A quick-release structure for a nonwoven filter bag, comprising a partition (1), a plurality of through holes (2) formed on the partition (1), and a plurality of disassembly structures (2) provided at the bottom of the partition (1), wherein the disassembly structures (2) are inserted into the through holes (3), characterized in that, The outer wall of the through hole (3) is provided with a set of square holes (4) and round holes (5). The square holes (4) and round holes (5) are connected. A snap-fit ​​mechanism is provided inside the square holes (4). The disassembly structure (2) includes a fixing mechanism and an inner support mechanism. The fixing mechanism is provided on the inner support mechanism. The fixing mechanism and the snap-fit ​​mechanism are configured in cooperation.

2. The quick-disassembly structure for a nonwoven filter bag according to claim 1, characterized in that, The snap-fit ​​mechanism includes a square bar (6) movably connected in the square hole (4). One end of the square bar (6) is arc-shaped and extends to the outside of the square hole (4). A round rod (7) is movably connected in both the square hole (4) and the round hole (5). One end of the round rod (7) is fixedly connected to the end of the square bar (6). A spring a (8) is provided in the square hole (4). The spring a (8) is sleeved on the round rod (7). One end of the spring a (8) is fixedly connected to the outside of the round hole (5), and the other end is fixedly connected to the end of the square bar (6).

3. The quick-disassembly structure for a nonwoven filter bag according to claim 2, characterized in that, The internal support mechanism includes a hollow end cap (9), a through pipe (10) fixedly connected to the upper part of the end cap (9), the through pipe (10) being connected to the end cap (9), a fixing mechanism being provided on the through pipe (10), an annular groove (11) being opened on the upper part of the end cap (9), and a filter bag internal support frame (12) being fixedly connected to the bottom of the end cap (9).

4. The quick-disassembly structure for a nonwoven filter bag according to claim 3, characterized in that, The fixing mechanism includes a pressing member, a wedge ring (13) and a toggle member respectively arranged on the through pipe (10) from top to bottom. The wedge ring (13) is sleeved and fixed on the through pipe (10). The inside of the wedge ring (13) is hollow, the outside is an arc surface and the bottom is a flat surface.

5. The quick-disassembly structure for a nonwoven filter bag according to claim 4, characterized in that, The pressing component includes a ring (14) fixed in the through hole (3), the ring (14) being movably sleeved on the through pipe (10), a set of limiting holes (15) being opened at the bottom of the ring (14), and a pressure ring (16) being movably sleeved on the through pipe (10). A set of cylinders (17) are fixedly connected to the pressure ring (16), the upper end of the cylinders (17) being movably inserted into the limiting holes (15), and a spring b (18) being sleeved on the cylinders (17). The upper end of the spring b (18) is fixedly connected to the bottom of the ring (14), and the lower part is fixedly connected to the upper part of the pressure ring (16).

6. The quick-disassembly structure for a nonwoven filter bag according to claim 5, characterized in that, The actuating component includes a conical ring (19) that is movably sleeved on the through pipe (10). The upper and lower parts of the conical ring (19) are flat, and the side is arc-shaped. A set of springs c (20) is fixedly connected to the bottom of the conical ring (19). The bottom of the springs c (20) is fixed to the upper part of the end cap (9). The elastic force of the spring b (18) is greater than that of the spring a (8). The elastic force of the spring a (8) is greater than that of the spring c (20). It also includes an insert ring (21) fixed to the bottom of the conical ring (19). The bottom of the insert ring (21) is movably inserted into the annular groove (11).

7. A nonwoven filter bag, comprising a filter bag body (22), characterized in that, The upper part of the filter bag body (22) is connected to an elastic opening (23), and the end of the elastic opening (23) is connected to a ring elastic rope (24).

8. A quick-release structure for a nonwoven filter bag according to any one of claims 1-7 and the nonwoven filter bag thereof, characterized in that, The filter bag body (22) is fitted onto the filter bag inner support (12), and the elastic opening (23) and the annular elastic rope (24) are fitted onto the end cap (9).

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