A type of dust collector bag that prevents clogging

Abstract

This utility model relates to the field of dust collector bag technology, specifically an anti-clogging dust collector bag, comprising: a bag body, an elastic expansion ring, and an anti-fall mechanism. An elastic expansion ring is fixed to the inner wall of the open end of the bag body, and the outer wall is secured to the tube sheet hole via the elastic expansion ring. A cage frame is slidably inserted into the bag body, and anti-fall mechanisms are provided on both sides of the elastic expansion ring. The anti-fall mechanism consists of a rotatable sleeve rod, a support column, and a rubber block. One end of the sleeve rod is fixed to the support column, and the other end is connected to an adjustment component. This design effectively intercepts accidental falls of the cage frame, preventing the bag from falling off due to impact, while protecting the elastic expansion ring structure from damage. Furthermore, the anti-fall mechanism achieves simple operation and automatic positioning through a handwheel drive and spring self-locking component, eliminating the need for manual bag retrieval, improving replacement efficiency, and protecting the coating layer. This design is fully compatible with standard installation procedures and does not affect cage frame positioning or dust collector operation.

Description

Technical Field

[0001] This utility model relates to the field of dustproof filter bag technology, specifically to a dustproof filter bag that prevents clogging. Background Technology

[0002] Anti-clogging dust collector bags are special filter elements formed by firmly, uniformly, and without damage bonding an expanded polytetrafluoroethylene (PTFE) film to the surface of the filter media base fabric using a coating process. This structure endows the filter bags with excellent anti-adhesion, water-repellent, oil-repellent, and easy-to-clean properties, making them an ideal choice for handling high humidity, oil mist, or sticky dust conditions. As a high-efficiency gas purification device, the core filtration unit of a baghouse dust collector consists of dust collector bags installed on the perforations of the tube sheet. To improve filtration efficiency and service life under harsh operating conditions, anti-clogging dust collector bags with PTFE coating or water- and oil-repellent treatment are widely used. These filter bags, relying on their special low surface energy characteristics, effectively inhibit dust adhesion and caking (i.e., "bag clogging"), significantly reducing system operating resistance and extending the service life of the filter bags.

[0003] Filter bag replacement is a routine operation during baghouse dust collector maintenance. The standard procedure involves first securing the top of the new anti-clogging filter bag to the tube sheet opening, then vertically inserting the metal cage frame into the filter bag for support. However, a significant operational hazard exists during the cage frame lowering and installation phase: due to the cage frame's considerable weight, operator error could cause it to slip and fall. The free-falling cage frame accumulates significant gravitational potential energy at its bottom, which is converted into impact force. When it violently impacts the initially secured but not yet fully fixed filter bag, it can easily cause the top securing structure to fail (e.g., the elastic expansion ring loosens). The direct consequence of this impact is that the filter bag is knocked off its installation position, falling into the ash hopper below the dust collector housing or becoming stuck below the tube sheet opening, forcing operators to perform a time-consuming and laborious retrieval operation, severely reducing replacement efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide an anti-clogging dust collector bag to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a dust collector bag for preventing bag clogging, comprising: a bag body, an elastic expansion ring fixedly installed on the inner wall of the open end of the bag body, the outer wall of the open end of the bag body being snapped into a hole in the tube sheet by the elastic expansion ring, and a cage frame being slidably inserted into the bag body.

[0006] The elastic expansion ring is equipped with anti-fall mechanisms on both sides. The anti-fall mechanism includes a rotatable sleeve rod. A support column is fixedly sleeved on one end of the sleeve rod. The upper surface of the support column is fixedly connected to a rubber block. An adjustment component for adjusting the rotation of the sleeve rod is connected to the other end of the sleeve rod.

[0007] Preferably, the adjustment component includes a support platform, which is fixedly installed on the upper surface of the tube sheet and is symmetrically arranged about the top of the bag body.

[0008] Preferably, a rotating shaft is rotatably fitted inside the support platform, with the bottom end of the rotating shaft fixedly fitted onto the end of the sleeve rod away from the support column, and a handwheel fixedly connected to the top end of the rotating shaft.

[0009] Preferably, a connecting ring is provided on the lower side of the handwheel, the connecting ring is fixedly sleeved on the rotating shaft, and a set of fixing pins is provided on one side of the connecting ring, with the bottom end of the fixing pins fixedly sleeved on the support platform.

[0010] Preferably, a pressure block is rotatably sleeved on the fixing pin, and an anti-slip pad is fixedly connected to one end of the pressure block. The anti-slip pad is adapted to the contour of the outer ring surface of the connecting ring.

[0011] Preferably, a pressure plate is fixedly connected to the other end of the pressure block, and the two pressure plates are fixedly connected by a spring.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: By setting a fall prevention mechanism consisting of a rotatable sleeve rod and a rubber buffer block on both sides of the elastic expansion ring, it effectively intercepts the accidentally falling cage and absorbs its impact kinetic energy, completely avoiding the risk of the filter bag falling off the tube sheet hole due to the impact of the bottom of the cage, while protecting the elastic expansion ring locking structure from failure due to destructive load; This design directly eliminates the manual retrieval process required for the filter bag to fall into the ash hopper or get stuck, significantly improving replacement efficiency and preventing damage to the coating layer during the retrieval process, ensuring the integrity of the anti-clogging performance; The fall prevention mechanism achieves simple operation and automatic positioning through a handwheel drive and spring self-locking component, and can be easily reset after the cage is installed in place, fully compatible with the standard installation process and does not affect the final positioning of the cage and the normal operation of the dust collector. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a bottom view of the internal structure of this utility model;

[0015] Figure 3 This is a side view of the internal structure of this utility model;

[0016] Figure 4 This utility model Figure 2 Enlarged schematic diagram of the structure at point A in the middle.

[0017] In the diagram: 1. Bag body; 2. Elastic expansion ring; 3. Pattern plate; 4. Pattern plate hole; 5. Cage frame; 6. Sleeve rod; 7. Support column; 8. Rubber block; 9. Support platform; 10. Rotating shaft; 11. Handwheel; 12. Connecting ring; 13. Fixing pin; 14. Pressure block; 15. Anti-slip pad; 16. Pressure plate; 17. Spring. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0019] Example 1: Please refer to Figures 1-4 This utility model provides a technical solution: an anti-clogging dust collector bag, comprising: a bag body 1, wherein the bag body 1 is laminated with an expanded polytetrafluoroethylene film firmly, uniformly and without damage to the surface of the filter material base cloth through a lamination process, thereby giving the bag body 1 anti-adhesion, water-repellent, oil-repellent and easy-to-clean properties, thus achieving anti-clogging; an elastic expansion ring 2 is fixedly installed on the inner wall of the open end of the bag body 1; the outer wall of the open end of the bag body 1 is engaged with the tube sheet hole 4 opened on the tube sheet 3 by the elastic expansion ring 2; the top of the bag body 1 is fixedly engaged with the tube sheet hole 4 by the elastic expansion ring 2, thereby fixing the bag body 1; and a cage frame 5 is slidably inserted into the bag body 1. The cage frame 5 supports the bag body 1, preventing the bag body 1 from being sucked down or blown up under negative or positive pressure, and withstands the airflow impact force during pulse jet cleaning, ensuring the cleaning effect and the stability of the shape of the bag body 1. The elastic expansion ring 2 is equipped with anti-fall mechanisms on both sides. The anti-fall mechanism can prevent the cage frame 5 from falling accidentally, thereby causing an impact that would cause the bag body 1 to fall. The anti-fall mechanism includes a rotatable sleeve rod 6, with through holes at both ends of the sleeve rod 6. A support column 7 is fixedly sleeved on one end of the sleeve rod 6. The upper surface of the support column 7 is fixedly connected to a rubber block 8, and the support column 7 provides fixed support for the rubber block 8. An adjustment component for adjusting the rotation of the sleeve rod 6 is connected to the other end of the sleeve rod 6.

[0020] In use, initially, the sleeve 6 is positioned away from the inner surface of the perforated plate hole 4. The closed end of the bag body 1 is inserted into the bottom of the perforated plate hole 4 until the bag body 1 is almost fully inserted. Then, the elastic expansion ring 2 is compressed to deform it, aligning its edge with the inner surface of the perforated plate hole 4. At this point, the elastic expansion ring 2 is released. Under its reverse elastic force, the elastic expansion ring 2 presses the edge of the bag body 1 tightly against the inner surface of the perforated plate hole 4, thus fixing the bag body 1. Then, by adjusting the adjustment component, the sleeve 6 is rotated towards the axis closer to the elastic expansion ring 2. Rotate until it is perpendicular to the axis of the elastic expansion ring 2, and then the cage frame 5 can be gradually inserted into the bag body 1 to support the bag body 1. If the cage frame 5 falls due to the operator's slip or other accidental circumstances, the top of the cage frame 5 will be blocked by the rubber block 8 on the support column 7 to cushion its fall and prevent the cage frame 5 from generating too much impact, which would cause the bag body 1 to be knocked away from the installation position and fall into the ash hopper below the dust collector box or get stuck below the tube sheet hole, forcing the operator to perform a time-consuming and laborious retrieval operation.

[0021] Example 2: Based on Example 1, the adjustment assembly includes a support platform 9, which is fixedly installed on the upper surface of the tube sheet 3. The support platform 9 is symmetrically arranged about the top of the bag body 1. The support platform 9 serves as the main body of the adjustment assembly, supporting its various components. A rotating shaft 10 is rotatably fitted inside the support platform 9, limiting the rotation of the rotating shaft 10. The bottom end of the rotating shaft 10 is fixedly fitted onto the end of the sleeve rod 6 away from the support column 7. A handwheel 11 is fixedly connected to the top end of the rotating shaft 10. Turning the handwheel 11 facilitates the rotation of the rotating shaft 10 within the support platform 9. A connecting ring 12 is provided on the lower side, and the connecting ring 12 is fixedly sleeved on the rotating shaft 10. A set of fixing pins 13 is provided on one side of the connecting ring 12. The bottom end of the fixing pins 13 is fixedly sleeved on the support platform 9. A pressure block 14 is rotatably sleeved on the fixing pins 13. The fixing pins 13 limit the pressure block 14. An anti-slip pad 15 is fixedly connected to one end of the pressure block 14. The anti-slip pad 15 is adapted to the contour of the outer ring surface of the connecting ring 12, so as to facilitate pressing on the outer ring surface of the connecting ring 12. A pressure plate 16 is fixedly connected to the other end of the pressure block 14. The two pressure plates 16 are fixedly connected by a spring 17.

[0022] After the bag body 1 is initially fixed, to prevent the cage frame 5 from accidentally falling during subsequent installation and impacting the bag body 1, the pressure plates 16 are pressed in opposite directions. The two pressure plates 16 compress the spring 17, causing the pressure plates 16 to drive the pressure block 14 to move. The pressure block 14 rotates under the limit of the fixing pin 13, causing the two pressure blocks 14 to move in opposite directions. The pressure block 14 then drives the anti-slip pad 15 to rotate away from the connecting ring 12. Next, by turning the handwheel 11, the handwheel 11 drives the rotating shaft 10 to rotate. The rotating shaft 10 rotates under the limit of the support platform 9, causing the rotating shaft 10 to drive the connecting ring 12 and the sleeve rod 6 fixedly sleeved at its bottom to rotate. The sleeve rod 6 moves towards the axis of the elastic expansion ring 2 until it is perpendicular to the axis of the elastic expansion ring 2. Then, the handwheel 11 is stopped, and the pressure plates 16 are released. The pressure plates 16 then spring apart under the reverse force of the spring 17 and move in opposite directions. The pressure plates 16 then drive the pressure block 14 to rotate away from the connecting ring 12. Block 14, limited by the fixing pin 13, causes the two pressing blocks 14 to move towards each other until the pressing block 14 drives the anti-slip pad 15 to tightly abut against the outer ring surface of the connecting ring 12, thereby limiting the connecting ring 12 and preventing the connecting ring 12 from driving the sleeve rod 6 to rotate. This ensures that the rubber block 8 is inside the slide hole 4. Even if the cage frame 5 falls due to the operator's slip or other accidents, the top of the cage frame 5 will be blocked by the rubber block 8 on the support column 7 to cushion its fall. At the same time, it prevents the cage frame 5 from having too much impact, which could cause the bag body 1 to be knocked away from the installation position and fall into the ash hopper below the dust collector box or get stuck below the tube sheet hole, forcing the operator to perform a time-consuming and laborious retrieval operation. In addition, when the top of the cage frame 5 is close to the upper surface of the tube sheet hole 4, the adjusting component can be used to rotate the sleeve rod 6 in the opposite direction to prevent the sleeve rod 6 from obstructing the lowering of the cage frame 5. Finally, the top of the cage frame 5 can abut against the upper surface of the tube sheet 3, thereby completing the installation of the cage frame 5.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dust bag for preventing bag sticking, comprising a bag body (1), characterized in that: An elastic expansion ring (2) is fixedly installed on the inner wall of the open end of the bag body (1). The outer wall of the open end of the bag body (1) is snapped into the hole (4) of the flower plate (3) through the elastic expansion ring (2). A cage frame (5) is slidably inserted into the bag body (1). The elastic expansion ring (2) is provided with anti-fall mechanisms on both sides. The anti-fall mechanism includes a rotatable sleeve rod (6). A support column (7) is fixedly sleeved on one end of the sleeve rod (6). The upper surface of the support column (7) is fixedly connected to the rubber block (8). An adjustment component for adjusting the rotation of the sleeve rod (6) is connected to the other end of the sleeve rod (6).

2. A dust bag for use in a bag filter according to claim 1, characterized in that: The adjustment assembly includes a support platform (9), which is fixedly installed on the upper surface of the tube sheet (3) and is symmetrically arranged about the top of the bag body (1).

3. A dust bag for use in a bag filter according to claim 2, wherein: The support platform (9) is rotatably fitted with a rotating shaft (10). The bottom end of the rotating shaft (10) is fixedly fitted on the end of the sleeve rod (6) away from the support column (7). The top end of the rotating shaft (10) is fixedly connected to a handwheel (11).

4. A dust bag for use in a bag filter according to claim 3, wherein: A connecting ring (12) is provided on the lower side of the handwheel (11). The connecting ring (12) is fixedly sleeved on the rotating shaft (10). A set of fixing pins (13) is provided on one side of the connecting ring (12). The bottom end of the fixing pins (13) is fixedly sleeved on the support platform (9).

5. A dust bag for use in a bag filter according to claim 4, wherein: A pressure block (14) is rotatably sleeved on the fixing pin (13). An anti-slip pad (15) is fixedly connected to one end of the pressure block (14). The anti-slip pad (15) is adapted to the outer ring surface contour of the connecting ring (12).

6. A dust bag for use in a bag filter according to claim 5, wherein: The other end of the pressure block (14) is fixedly connected to a pressure plate (16), and the two pressure plates (16) are fixedly connected by a spring (17).

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