High-temperature filter bag

Abstract

The utility model relates to the technical field of filter bags, and discloses a high-temperature filter bag, which comprises a filter bag main body, a filter device is arranged in the filter bag main body, the filter device comprises a plurality of U-shaped frames and a filter screen disc, the U-shaped frames are fixedly arranged at the upper end of the inner wall of the filter bag main body, the upper surface of each U-shaped frame is provided with a limiting hole in a penetrating manner, and the filter screen disc is arranged in the limiting hole. A pull rod is movably connected into the limiting hole, a fixing block is fixedly connected to the circumferential surface of the pull rod, a telescopic spring is fixedly connected between the fixing block and the inner wall of the upper end of the U-shaped frame, the pull rod is pulled, the fixing block drives the telescopic spring to be stressed and contracted, at the moment, the filter screen disc is inserted into the U-shaped frame through a circular ring connected with a connecting piece, and then the pull rod is loosened. When high-temperature flue gas enters the filter bag main body, solid particles are preliminarily filtered by the filter holes in the surface of the filter screen disc, and the filtered fixed particles are retained in the grooves.

Description

Technical Field

[0001] The utility model relates to the technical field of filter bags, in particular to a high-temperature filter bag. Background Technique

[0002] Filter bags have excellent chemical stability and heat resistance. They are representatives of the highest performance in the filter material industry and are also the highest-end varieties among all commonly used filter materials. They reach relatively high levels in terms of filtration efficiency and filtration accuracy. Filter bags are key components during the operation of bag filters. Usually, cylindrical filter bags are vertically suspended in the dust collector. The fabric and design of the filter bags should strive for high-efficiency filtration, easy dust stripping, and long durability. In pulse and pulse-jet box dust collectors, dust adheres to the outer surface of the filter bags. When the dust-containing gas passes through the dust collector, the dust is trapped on the outer surface of the filter bags, while the clean gas enters the interior of the filter bags through the filter material. At the same time, it helps with the removal and redistribution of the dust cake.

[0003] In high-temperature flue gas filtration, filter bags can effectively filter out soot particles and ensure compliance with emissions standards. However, most existing filter bags do not have a separate filtration device for preliminary filtration of solid particles in the flue gas. After long-term use, it is easy for the filtration holes of the filter bags themselves to be blocked, resulting in the loss of filtration effect. For this reason, we propose a high-temperature filter bag. Content of the Utility Model

[0004] The purpose of the utility model is to provide a high-temperature filter bag to solve the problem that most existing filter bags do not have a separate filtration device for preliminary filtration of solid particles in the flue gas, which easily causes the filtration holes of the filter bags themselves to be blocked after long-term use and results in the loss of filtration effect as mentioned in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A high-temperature filter bag, including a filter bag body. A filtration device is arranged inside the filter bag body. The filtration device includes a U-shaped frame and a filtration wire mesh disk. A plurality of U-shaped frames are provided and are all fixedly installed at the upper end of the inner wall of the filter bag body. A limiting hole is penetrated and opened on the upper surface of the U-shaped frame, and a pull rod is movably connected in the limiting hole. A fixing block is fixedly connected to the circumferential surface of the pull rod. A telescopic spring is fixedly connected between the fixing block and the upper end inner wall of the U-shaped frame. A plurality of connecting pieces are fixedly installed on the circumferential surface of the filtration wire mesh disk. One end of each of the plurality of connecting pieces away from the filtration wire mesh disk is fixedly connected with a ring.

[0006] As a preferred solution, fixing rings are fixedly installed on the circumferential surfaces at the upper and lower ends of the filter bag body, and a locking device is arranged on the circumferential surface of the filter bag body and above the upper fixing ring.

[0007] As a preferred solution, multiple said U-shaped frames are distributed in a circumferential array, the telescopic springs are slidably connected to the circumferential surface of the pull rod, the fixed blocks are arranged inside the U-shaped frames, multiple said connecting pieces are distributed in a circumferential array, and the circular ring is adapted to the pull rod.

[0008] As a preferred solution, grooves are formed on the surface of the filter wire mesh disk, and a plurality of uniformly distributed filter holes are formed on the surface of the grooves.

[0009] As a preferred solution, the locking device includes an upper locking ring and a lower locking ring. Two connecting plates are fixedly installed at both ends of the upper locking ring and the lower locking ring, and the two connecting plates are threadedly connected by locking bolts. Upper fixed ears are fixedly connected to the circumferential surfaces on both sides of the upper locking ring, and lower fixed ears are fixedly connected to the circumferential surfaces on both sides of the lower locking ring.

[0010] As a preferred solution, a telescopic column is fixedly installed between the upper fixed ear and the lower fixed ear, and anti-slip pads are installed on the inner walls of the upper locking ring and the lower locking ring.

[0011] As a preferred solution, polytetrafluoroethylene fibers are fixedly installed on the surface of the filter bag body, a polyester film is fixedly installed on the surface of the polytetrafluoroethylene fibers, and a corrosion-resistant coating is fixedly installed on the surface of the polyester film.

[0012] The technical effects and advantages of the present utility model:

[0013] 1. By providing a filtering device, first, by pulling the pull rod, the fixed block drives the telescopic elastic force to contract. At this time, the circular ring connected by the connecting piece of the filter wire mesh disk is inserted into the inside of the U-shaped frame. Then, the pull rod is released, and the telescopic spring returns to drive the pull rod to return and pass through the circular ring, thereby completing the fixation of the filter wire mesh disk. When high-temperature flue gas enters the filter bag body, the filter holes on the surface of the filter wire mesh disk will preliminarily filter the solid particles, and the filtered solid particles will remain in the grooves. After disassembling the filter wire mesh disk, it is convenient to clean, preventing the solid particles from blocking the filter holes of the filter bag body itself;

[0014] 2. By providing a locking device, when the filter bag body is connected to the smoke exhaust pipe, the filter bag body is sleeved on the surface of the pipe. The telescopic column has elasticity. After adjusting the positions of the upper locking ring and the lower locking ring, then the upper locking ring and the lower locking ring are locked by the locking bolts to complete the fixation of the filter bag body, avoiding the filter bag body falling off during the filtering process. Polytetrafluoroethylene fibers usually have a relatively high fineness and aspect ratio to increase the filtering area and filtering efficiency of the filter bag body. The polyester film can protect the surface of the filter bag body from damage such as abrasion, scratching, corrosion, and pollution, and extend its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0016] Figure 2 is a front view sectional structure schematic diagram of the present utility model;

[0017] Figure 3 is a structure schematic diagram of the filtering device of the present utility model;

[0018] Figure 4 is a partial structure schematic diagram of the filtering device of the present utility model;

[0019] Figure 5 is a structure schematic diagram of the locking device of the present utility model;

[0020] Figure 6 is a schematic diagram of the internal composition structure of the filter bag body of the present utility model;

[0021] Figure 7 is a structure schematic diagram of the filtering mesh disk of the present utility model.

[0022] In the figure: 1. Filter bag body; 2. Fixed ring; 3. Filtering device; 4. Locking device; 31. U-shaped frame; 32. Filtering mesh disk; 33. Groove; 34. Limiting hole; 35. Pull rod; 36. Fixed block; 37. Telescopic spring; 38. Connecting piece; 39. Ring; 41. Upper locking ring; 42. Lower locking ring; 43. Connecting plate; 44. Locking bolt; 45. Upper fixing ear; 46. Lower fixing ear; 47. Telescopic column; 11. Polytetrafluoroethylene fiber; 12. Polyester film; 13. Corrosion-resistant coating. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] Embodiment 1:

[0025] Please refer to the attached Figure 1 -attached Figure 7, a high-temperature filter bag, comprising a filter bag body 1, a filtering device 3 is arranged inside the filter bag body 1, the filtering device 3 includes a U-shaped frame 31 and a filtering disk 32, a plurality of U-shaped frames 31 are provided and are all fixedly installed at the upper end of the inner wall of the filter bag body 1, a limiting hole 34 is formed through the upper surface of the U-shaped frame 31, and a pull rod 35 is movably connected in the limiting hole 34. A fixing block 36 is fixedly connected to the circumferential surface of the pull rod 35, and a telescopic spring 37 is fixedly connected between the fixing block 36 and the inner wall of the upper end of the U-shaped frame 31. A plurality of connecting pieces 38 are fixedly installed on the circumferential surface of the filtering disk 32, and a ring 39 is fixedly connected to one end of each of the plurality of connecting pieces 38 away from the filtering disk 32. Fixing rings 2 are fixedly installed on the circumferential surfaces of the upper and lower ends of the filter bag body 1. A locking device 4 is arranged on the circumferential surface of the filter bag body 1 and above the upper fixing ring 2. The plurality of U-shaped frames 31 are arranged in a circumferential array. The telescopic spring 37 is slidably connected to the circumferential surface of the pull rod 35. The fixing block 36 is arranged inside the U-shaped frame 31. The plurality of connecting pieces 38 are arranged in a circumferential array. The ring 39 is adapted to the pull rod 35. Grooves 33 are formed on the surface of the filtering disk 32, and a plurality of uniformly distributed filter holes are formed on the surface of the grooves 33.

[0026] The fixing ring 2 outside the filter bag body 1 is used for support to prevent the filter bag body 1 from collapsing. There are no filter holes in the filter bag body 1 located above the filtering disk 32 for discharging flue gas, and filter holes are provided at the lower end of the filtering disk 32 for discharging flue gas.

[0027] Specifically, first, by pulling the pull rod 35, the fixing block 36 drives the telescopic spring 37 to contract under force. At this time, the filtering disk 32 is inserted into the U-shaped frame 31 through the ring 39 connected by the connecting piece 38. Then, the pull rod 35 is released, and the telescopic spring 37 will reset and drive the pull rod 35 to reset and pass through the ring 39, thus completing the fixation of the filtering disk 32. When high-temperature flue gas enters the filter bag body 1, the filter holes on the surface of the filtering disk 32 will preliminarily filter the solid particles. The filtered solid particles are retained in the grooves 33. After disassembling the filtering disk 32, it is convenient to clean and prevent the solid particles from blocking the filter holes of the filter bag body 1 itself.

[0028] Embodiment Two:

[0029] Please refer to the appendix Figure 1 - Appendix Figure 7, and on the basis of the first embodiment, it is further obtained that the locking device 4 includes an upper locking ring 41 and a lower locking ring 42. Two connecting plates 43 are fixedly installed at both ends of the upper locking ring 41 and the lower locking ring 42, and the two connecting plates 43 are threadedly connected by locking bolts 44. Upper fixing ears 45 are fixedly connected to the circumferential surfaces on both sides of the upper locking ring 41, and lower fixing ears 46 are fixedly connected to the circumferential surfaces on both sides of the lower locking ring 42. A telescopic column 47 is fixedly installed between the upper fixing ear 45 and the lower fixing ear 46. Anti-slip pads are installed on the inner walls of the upper locking ring 41 and the lower locking ring 42. Polytetrafluoroethylene fibers 11 are fixedly installed on the surface of the filter bag body 1, polyester films 12 are fixedly installed on the surface of the polytetrafluoroethylene fibers 11, and corrosion-resistant coatings 13 are fixedly installed on the surface of the polyester films 12.

[0030] There are two groups of telescopic columns 47, and the two groups of telescopic columns 47 are respectively arranged on the upper locking ring 41 and the lower locking ring 42. The upper end of the telescopic column 47 is fixedly connected to the upper fixing ear 45, and the lower end of the telescopic column 47 is fixedly connected to the surface of the lower fixing ear 46. The setting of the anti-slip pad prevents the filter bag body 1 from loosening when being locked.

[0031] Specifically, when the filter bag body 1 is connected to the smoke exhaust pipe, the filter bag body 1 is sleeved on the surface of the pipe. The telescopic column 47 is telescopic. After adjusting the positions of the upper locking ring 41 and the lower locking ring 42, then the upper locking ring 41 and the lower locking ring 42 are locked by the locking bolts 44 to complete the fixation of the filter bag body 1, avoiding the filter bag body 1 falling off during the filtering process. The polytetrafluoroethylene fibers 11 usually have a relatively high fineness and aspect ratio to increase the filtering area and filtering efficiency of the filter bag body 1. The polyester film 12 can protect the surface of the filter bag body 1 from damage such as abrasion, scratching, corrosion, and pollution, and extend its service life.

[0032] The working principle of this utility model: This utility model is a high-temperature filter bag. First, by pulling the pull rod 35, the fixed block 36 drives the telescopic spring 37 to contract under force. At this time, the ring 39 connected by the connecting piece 38 of the filter mesh disk 32 is inserted into the U-shaped frame 31. Then, the pull rod 35 is released, and the telescopic spring 37 returns to its original position and drives the pull rod 35 to return to its original position, passing through the ring 39, thereby completing the fixation of the filter mesh disk 32. Then, the filter bag body 1 is sleeved on the surface of the pipe. The telescopic column 47 is telescopic. After adjusting the positions of the upper locking ring 41 and the lower locking ring 42, then the upper locking ring 41 and the lower locking ring 42 are locked by the locking bolts 44 to complete the fixation of the filter bag body 1, avoiding the filter bag body 1 falling off during the filtering process. When high-temperature flue gas enters the filter bag body 1, the filter holes on the surface of the filter mesh disk 32 initially filter the solid particles, and the filtered solid particles remain in the grooves 33. After disassembling the filter mesh disk 32, it is convenient to clean, preventing the solid particles from blocking the filter holes of the filter bag body 1 itself.

[0033] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A high-temperature filter bag, comprising a filter bag body (1), characterized in that: Inside the filter bag body (1), a filtering device (3) is provided. The filtering device (3) includes a U-shaped frame (31) and a filtering wire mesh disk (32). A plurality of U-shaped frames (31) are provided and are all fixedly installed at the upper end of the inner wall of the filter bag body (1). A limiting hole (34) is penetrated and opened on the upper surface of the U-shaped frame (31), and a pull rod (35) is movably connected in the limiting hole (34). A fixing block (36) is fixedly connected to the circumferential surface of the pull rod (35). A telescopic spring (37) is fixedly connected between the fixing block (36) and the inner wall of the upper end of the U-shaped frame (31). A plurality of connecting pieces (38) are fixedly installed on the circumferential surface of the filtering wire mesh disk (32). One end of each of the plurality of connecting pieces (38) away from the filtering wire mesh disk (32) is fixedly connected with a ring (39).

2. The high-temperature filter bag according to claim 1, characterized in that: Fixed rings (2) are fixedly installed on the circumferential surfaces of the upper and lower ends of the filter bag body (1). A locking device (4) is provided on the circumferential surface of the filter bag body (1) and above the upper fixed ring (2).

3. A high-temperature filter bag according to claim 1, characterized in that: The plurality of U-shaped frames (31) are distributed in a circumferential array. The telescopic spring (37) is slidably connected to the circumferential surface of the pull rod (35). The fixing block (36) is arranged inside the U-shaped frame (31). The plurality of connecting pieces (38) are distributed in a circumferential array. The ring (39) is adapted to the pull rod (35).

4. A high-temperature filter bag according to claim 1, characterized in that: Grooves (33) are opened on the surface of the filtering wire mesh disk (32), and a plurality of uniformly distributed filter holes are opened on the surface of the grooves (33).

5. The high-temperature filter bag according to claim 2, wherein: The locking device (4) includes an upper locking ring (41) and a lower locking ring (42). Two connecting plates (43) are fixedly installed at both ends of the upper locking ring (41) and the lower locking ring (42), and the two connecting plates (43) are threadedly connected by a locking bolt (44). Upper fixing ears (45) are fixedly connected to the circumferential surfaces on both sides of the upper locking ring (41). Lower fixing ears (46) are fixedly connected to the circumferential surfaces on both sides of the lower locking ring (42).

6. The high-temperature filter bag according to claim 5, characterized in that: A telescopic column (47) is fixedly installed between the upper fixing ear (45) and the lower fixing ear (46). Anti-slip pads are installed on the inner walls of the upper locking ring (41) and the lower locking ring (42).

7. A high-temperature filter bag according to claim 1, characterized in that: Polytetrafluoroethylene fibers (11) are fixedly installed on the surface of the filter bag body (1). A polyester film (12) is fixedly installed on the surface of the polytetrafluoroethylene fibers (11). A corrosion-resistant coating (13) is fixedly installed on the surface of the polyester film (12).

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