Long metal filter bag

Abstract

The utility model relates to the technical field of dust removers, and discloses a long metal filter bag which comprises a first filter bag and a second filter bag, a tubesheet is arranged above the first filter bag, a mounting hole is formed in the tubesheet, the first filter bag and the second filter bag are connected by arranging a first sealing butt-joint assembly, and a second sealing butt-joint assembly is arranged between the first sealing butt-joint assembly and the second sealing butt-joint assembly. The first filter bag and the tubesheet are connected by arranging a second sealing butt-joint assembly; the first sealing butt joint assembly comprises a first connector and a second connector, the first connector is arranged at the bottom of the first filter bag, the second connector is arranged at the top of the second filter bag, and when the first filter bag is connected with the second filter bag, the second connector is sleeved with the first filter bag and abuts against the first connector; the second sealing butt joint assembly comprises a bag head flange arranged on the tubesheet, the top of the first filter bag penetrates through the mounting hole and then is fixed on the tubesheet through the bag head flange, and a fixing piece is further arranged on the bag head flange; the utility model has the advantages of simple structure, no need of processing pattern plate and good adaptability.

Description

Technical Field

[0001] The utility model relates to a long metal filter bag, belonging to the technical field of dust collectors. Background Technique

[0002] The bag filter or the electrostatic bag filter is a dry dust filtering device, which can filter the dust-containing gas by using the filtering effect of the fiber fabric. Their key component is the filter bag. At present, most of the filter bags of bag filters or electrostatic bag filters are mainly non-metal filter bags made of woven filter cloth or non-woven felt, and the filter materials usually adopt materials such as cotton fiber, glass fiber, and synthetic fiber. These non-metal filter bags have a short service life and generally cannot be used in high-temperature environments above 250°C. Therefore, there appears a metal filter bag made of metal fiber sintered felt or metal powder sintered felt as the filter material and fabricated through high-precision welding. The inner part of this metal filter bag is welded with a framework and has an integral circular structure with the framework, and has the advantages of high temperature resistance, corrosion resistance, long service life, and easy recycling and treatment.

[0003] The sealing and installation of the conventional non-metal filter bag and the flower plate hole are mainly realized by pressing the elastic support ring at the head of the filter bag against the flower plate hole, but this installation and sealing structure is not applicable to the metal filter bag. In order to solve the sealing and installation of the metal filter bag and the flower plate, in the prior art, for example, the utility model patent with the Chinese patent authorization publication number CN205145813U discloses a dust collector and its metal filter bag, and the utility model patent with the Chinese patent authorization publication number CN202237643U discloses a cam-locking filter bag mechanism. In the above disclosed technical solutions, the installation of the metal filter bag and the flower plate hole both adopt the pressing plate type. First, bolts or positioning parts are welded on the flower plate, and then the metal filter bag is pressed against the flower plate hole by nuts or cam-locking pressing plates to achieve sealing and fixation. Another example is the utility model patent with the Chinese patent authorization publication number CN204767919U, which discloses an installation structure of a flexible porous metal filter bag, and the utility model patent with the Chinese patent authorization publication number CN212188208U, which discloses an installation and fixation structure of a metal filter bag. In the above disclosed technical solutions, the installation of the flange at the head of the filter bag and the flower plate hole both adopt bolt connection. It is necessary to open several threaded holes or weld bolts around the flower plate hole, and it is also necessary to open bolt holes around the flange of the bag head. The flange of the filter bag head is locked on the flower plate hole through bolts or nuts to achieve sealing and fixation. When installing the metal filter bag and the flower plate hole in the above technical solutions, it is necessary to add installation positioning parts on the flower plate to achieve sealing and fixation, which has a large workload and increases the weight of the flower plate. Welding positioning parts or opening threaded holes on the flower plate is likely to cause deformation of the flower plate and cannot ensure the flatness of the flower plate, affecting the perpendicularity of the filter bag.

[0004] For another example, the utility model patent with the Chinese patent authorization publication number CN218962109 discloses a flange applied to a metal filter bag. By means of a plurality of buckle components on the outer side surface of the flange body pressing against the flower plate, the metal filter bag can be sealed and fixed on the flower plate. Its specific implementation method is as follows: during installation, first place the buckle components into the installation grooves, then place the flower plate on the top of the buckle components for installation, and finally complete the pressing and fixing of the flower plate by welding the installation fixing pieces. Although this implementation method does not add installation positioning parts to the flower plate, it has major defects: 1. The installation sequence is incorrect. The flower plate is installed inside the dust collector in advance, and it is impossible to place the flower plate on the top of the buckle components for installation. Moreover, the fixing pieces are at the bottom of the flower plate, and welding installation is extremely difficult, which does not conform to the engineering reality; 2. After the filter bag is installed, the buckle components are at the bottom of the flower plate. When the operator stands on the flower plate surface, it is impossible to reach into the bottom of the flower plate to disassemble, and the disassembly is extremely difficult, which does not conform to the engineering reality; 3. The buckle components are already positioned and cannot be adjusted. When there are manufacturing errors or the sealing gasket is deformed, the sealing performance cannot be guaranteed.

[0005] Since the metal filter bag has a certain rigidity and cannot be folded and contracted, in order to facilitate production, handling, and installation, the length of a single-section metal filter bag is generally not more than 4 meters. A long metal filter bag is generally formed by butt-jointing multiple sections of metal filter bags. In the prior art, the utility model patent with the Chinese patent authorization publication number CN205145727 discloses a quick-change filter element. In the technical solution it discloses, the connection between metal filter bag sections is by threaded connection. The utility model patent with the Chinese patent authorization publication number CN207102154 discloses a quick docking structure for a long metal filter bag. In the technical solution it discloses, the connection between metal filter bag sections is by flange bolts. The utility model patent with the Chinese patent authorization publication number CN208089724 discloses a metal filter bag docking structure. In the technical solution it discloses, the connection between metal filter bag sections is by a convex claw and a groove connector. In the production, handling and other links of the metal filter bags disclosed by the above technical solutions, there are problems of large occupied space and large number of transported items, resulting in an increase in the costs of warehousing and handling. Utility Model Content

[0006] In order to solve the above problems existing in the prior art, the present utility model provides a long metal filter bag that is convenient for installation, handling and has a simple structure, and has the following technical effects:

[0007] 1. The seal installation structure is integrated with the head of the metal filter bag, and there are no additional positioning parts on the flower plate, and the structure is simple.

[0008] 2. No operations need to be carried out on the ceiling plate, such as welding positioning parts or threading holes, greatly reducing the installation workload. At the same time, without operations such as welding on the ceiling plate, deformation will not occur, which can better ensure the flatness of the ceiling plate, the perpendicularity of the filter bag, and is more suitable for the transformation project of replacing metal filter bags. There is no need to transform the ceiling plate, and it has good adaptability.

[0009] 3. Reduce the stacking space, the quantity of handling, and the transportation cost.

[0010] The technical solution of the present utility model is as follows:

[0011] A long metal filter bag includes a first filter bag and a second filter bag. The first filter bag is arranged above the second filter bag, and a ceiling plate is arranged above the first filter bag. Mounting holes are formed on the ceiling plate. The first filter bag and the second filter bag are connected by a first sealing docking assembly, and the first filter bag and the ceiling plate are connected by a second sealing docking assembly. The first sealing docking assembly includes a first connector and a second connector. The first connector is arranged at the bottom of the first filter bag, and the second connector is arranged at the top of the second filter bag. When the first filter bag and the second filter bag are connected, the second connector is sleeved into the first filter bag and abuts against the first connector. The second sealing docking assembly includes a bag head flange arranged on the ceiling plate. The top of the first filter bag passes through the mounting hole and is fixed to the ceiling plate by the bag head flange. A fixing member for pressing and fixing the bag head flange to the ceiling plate is also arranged on the bag head flange.

[0012] Wherein, the inner diameter of the first filter bag is set to be larger than the outer diameter of the second filter bag. Both the first connector and the second connector are arranged in an annular structure. After the second connector is sleeved into the first filter bag, its bottom surface abuts against the top surface of the first connector. A sealing groove is formed on the top surface of the first connector, and a sealing ring is installed in the sealing groove. An insertion groove is formed on the bottom surface of the second connector by arranging an annular boss. When the first connector and the second connector are abutted, the annular boss is tightly attached to the sealing ring in the sealing groove, and the groove wall of the sealing groove close to the second filter bag side is inserted into the insertion groove.

[0013] Wherein, a locking block is threadedly connected to the outer wall of the second filter bag by threading an external thread. When the first filter bag and the second filter bag are connected, the top surface of the locking block abuts against the bottom surface of the first connector.

[0014] Wherein, the inner wall at the port position of the second connector far from the second filter bag side is arranged in an inclined flared structure.

[0015] Wherein, a sealing gasket is arranged at the top of the first filter bag. After the top of the first filter bag passes through the mounting hole, the sealing gasket is located between the bag head flange and the ceiling plate.

[0016] Among them, the fixing member includes an installation table, which is arranged on the inner ring part of the bag head flange. The installation table is used to connect the bag head flange and the body of the first filter bag. A through hole adapted to the outer diameter of the installation table is provided on the sealing gasket. When the bag head flange is arranged on the sealing gasket, the end of the installation table on the side away from the bag head flange sequentially passes through the through hole and the installation hole and extends below the flower plate. An installation cavity is inwardly provided on the end of the installation table extending below the flower plate. A top block is rotatably connected to the installation cavity by arranging a pin shaft. A threaded hole is provided on the bag head flange, and the threaded hole is communicated with the installation cavity. A pressing screw is threadedly connected into the threaded hole. One end of the top block abuts against the pressing screw, and the other end abuts against the bottom wall of the flower plate so as to be able to press and fix the bag head flange and the flower plate.

[0017] Among them, the top block is arranged in a polygonal structure with a rectangle in the middle and protrusions symmetrically arranged at both ends. When the top block fixes the bag head flange and the flower plate, the protrusions on the corresponding side ends of the top block abut against the bottom wall of the flower plate.

[0018] Among them, the number of the installation cavities is at least two. The installation cavities are used to arrange the pin shaft, the top block and the pressing screw. The installation cavities are symmetrically distributed in a circular array with the center line of the bag head flange as the array center on the inner ring part of the bag head flange.

[0019] The utility model has the following beneficial effects:

[0020] 1. The utility model connects the first filter bag and the second filter bag by setting the first sealing docking assembly. By abutting the first connecting head and the second connecting head and cooperating with the sealing groove, the sealing ring, the annular convex platform, the insertion groove, the external thread and the locking block, the first filter bag and the second filter bag can be sleeved together to realize the quick docking of the first filter bag and the second filter bag. At the same time, by setting the inner diameter of the first filter bag to be larger than the outer diameter of the second filter bag, when the long metal filter bag is manufactured and shipped, the second filter bag can be pre-sleeved into the first filter bag, so as to reduce the stacking space, the handling quantity and the transportation cost.

[0021] 2. By setting the inner diameter of the first filter bag to be larger than the outer diameter of the second filter bag, the utility model can also reduce the rising speed of the air flow, so as to reduce the secondary dust generation.

[0022] 3. The utility model connects the flower plate with the first filter bag by setting a second sealing and docking component. By pressing the top of the first filter bag against the top surface of the flower plate with the bag head flange, in combination with the settings of the sealing gasket, mounting table, through hole, mounting cavity, pin shaft, top block, and pressing screw, the flower plate can be connected to the first filter bag. By setting the sealing gasket on the first filter bag, no additional positioning parts need to be set on the flower plate, and the structure is simple. By fixing the bag head flange with the pressing screw and the top block, no operations such as welding positioning parts or threading holes need to be performed on the flower plate, which can greatly reduce the installation workload. At the same time, there is no welding or other operations on the flower plate, so it will not be deformed, which can better ensure the flatness of the flower plate and the perpendicularity of the filter bag, and is more suitable for the transformation project of replacing metal filter bags without modifying the flower plate, with good adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of the utility model;

[0024] Figure 2 is a schematic structural diagram of the first sealing and docking component;

[0025] Figure 3 is a schematic structural diagram of the bottom position of the first filter bag;

[0026] Figure 4 is the structural use of the top position of the second filter bag;

[0027] Figure 5 is a schematic structural diagram of the second sealing and docking component;

[0028] Figure 6 is a cross-sectional view of the second sealing and docking component.

[0029] The reference numerals in the drawings are represented as:

[0030] 1. First filter bag; 2. Second filter bag; 3. Flower plate; 4. Mounting hole; 5. First connector; 6. Second connector; 7. Bag head flange; 8. Sealing groove; 9. Sealing ring; 10. Annular boss; 11. Insertion groove; 12. External thread; 13. Locking block; 14. Sealing gasket; 15. Mounting table; 16. Through hole; 17. Mounting cavity; 18. Pin shaft; 19. Top block; 20. Threaded hole; 21. Pressing screw. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The following will describe the present utility model in detail with reference to the drawings and specific embodiments.

[0032] Embodiment: Please refer to Figures 1 to 5, this embodiment provides a long metal filter bag, which includes a first filter bag 1 and a second filter bag 2. The first filter bag 1 is arranged above the second filter bag 2. There is a flower plate 3 above the first filter bag 1, and an installation hole 4 is opened on the flower plate 3. The installation hole 4 is arranged to allow the first filter bag 1 to pass through. The first filter bag 1 and the second filter bag 2 are connected by setting a first sealing and docking component, and the first filter bag 1 and the flower plate 3 are connected by setting a second sealing and docking component.

[0033] In this embodiment, the first sealing and docking component includes a first connector 5 and a second connector 6. Both the first connector 5 and the second connector 6 are arranged in an annular structure. The first connector 5 is fixedly arranged at the bottom position of the first filter bag 1, and the first connector 5 is arranged on the inner wall of the first filter bag 1. The second connector 6 is fixedly arranged at the top position of the second filter bag 2, and the second connector 6 is arranged on the outer wall of the second filter bag 2. The inner diameter of the first filter bag 1 is set to be larger than the outer diameter of the second filter bag 2, so that the second filter bag 2 can be sleeved into the first filter bag 1. When the second filter bag 2 is sleeved into the first filter bag 1 for connection with the first filter bag 1, the second connector 6 is sleeved into the first filter bag 1 and its bottom surface abuts against the top surface of the first connector 5.

[0034] To ensure the connection between the first connector 5 and the second connector 6, in this embodiment, an annular sealing groove 8 is opened on the top surface of the first connector 5, and a sealing ring 9 is installed in the sealing groove 8. After setting an annular boss 10 on the bottom surface of the second connector 6, a plugging groove 11 which is also arranged in an annular structure is formed. When the first connector 5 abuts against the second connector 6, the bottom surface of the annular boss 10 can be tightly attached to the top surface of the sealing ring 9 in the sealing groove 8, and the groove wall of the sealing groove 8 close to the second filter bag 2 can be inserted into the plugging groove 11. At the same time, a locking block 13 is also threadedly connected to the outer wall of the second filter bag 2 by opening an external thread 12. When the second filter bag 2 is sleeved into the first filter bag 1 for connection with the first filter bag 1, the locking block 13 can move adaptively under the action of the external thread 12 by rotation, and its top surface can be tightly attached to the bottom surface of the first connector 5.

[0035] Through the foregoing settings, the settings of the sealing groove 8, the sealing ring 9 and the annular boss 10 can ensure the connection tightness between the first connector 5 and the second connector 6. At the same time, with the cooperation of the settings of the plugging groove 11 and the locking block 13, the first connector 5 and the second connector 6 can be limited, so that the first connector 5 and the second connector 6 will not be separated, thereby ensuring the stability of the connection relationship between the first connector 5 and the second connector 6, and further ensuring the connection between the first filter bag 1 and the second filter bag 2, making it not easy to fall off and other phenomena.

[0036] In order to make the cleaning and blowing air flow smooth, in this embodiment, the inner wall of the port position of the second connector 6 away from the second filter bag 2 side is provided with an inclined flared structure.

[0037] In this embodiment, the second sealing and docking assembly includes a bag head flange 7 arranged on the flower plate 3. A sealing gasket 14 is arranged at the top of the first filter bag 1. After the top of the first filter bag 1 passes through the mounting hole 4, the sealing gasket 14 is located between the bag head flange 7 and the flower plate 3. By pressing the bag head flange 7 and the sealing gasket 14, the first filter bag 1 can be fixed and sealed on the flower plate 3. A fixing member for pressing and fixing the bag head flange 7 on the flower plate 3 is also arranged on the bag head flange 7.

[0038] The fixing member includes a mounting table 15 and a mounting inner cavity 17 arranged on the mounting table 15. The mounting table 15 is arranged on the inner ring part of the bag head flange 7. The number of the mounting inner cavities 17 is at least two. The mounting inner cavities 17 are symmetrically distributed in a circular array with the center line of the bag head flange 7 as the array center on the inner ring part of the bag head flange 7. In this embodiment, the number of the mounting inner cavities 17 is four. In actual use, the number and distribution of the mounting inner cavities 17 can be determined according to the actual situation. Through holes 16 adapted to the outer diameter of the mounting table 15 are formed on the sealing gasket 14, so that the mounting table 15 can be sleeved into the through holes 16. When the bag head flange 7 is arranged on the sealing gasket 14, the end parts of the mounting table 15 away from the bag head flange 7 side sequentially pass through the through holes 16 at corresponding positions on the sealing gasket 14 and the mounting holes 4 on the flower plate 3 and then extend below the flower plate 3. Mounting inner cavities 17 are inwardly formed at the end parts of each mounting table 15 extending below the flower plate 3. Each mounting inner cavity 17 is rotatably connected with a top block 19 by arranging a pin shaft 18. Threaded holes 20 are formed on the bag head flange 7. The threaded holes 20 are communicated with the mounting inner cavities 17. A pressing screw 21 is threadedly connected into each threaded hole 20. The nail tip of each pressing screw 21 can extend from the threaded hole 20 into the corresponding inner cavity 17. Each top block 19 can be abutted against the extending end of the pressing screw 21 at one end and the bottom wall of the flower plate 3 at the other end, so that the bag head flange 7 and the flower plate 3 can be pressed and fixed.

[0039] In this embodiment, the top block 19 is arranged in a polygonal structure with a rectangle in the middle and protrusions symmetrically arranged at both end parts. When the top block 19 fixes the bag head flange 7 and the flower plate 3, the protrusions on the corresponding side end parts of the top block 19 are abutted against the bottom wall of the flower plate 3, so that the top block 19 can better perform the corresponding fixing work.

[0040] The working principle of the present utility model is as follows. When the long metal filter bag is in use, the first filter bag 1 and the second filter bag 2 are first manufactured, and the second filter bag 2 is sleeved inside the first filter bag 1, and then it can be shipped out of the factory. Due to the socket connection between the first filter bag 1 and the second filter bag 2, the stacking space, the number of handling, and the transportation cost can be reduced, meeting the actual requirements of the project. After the long metal filter bag is shipped out of the factory, the first filter bag 1 and the second filter bag 2 are docked. First, the second filter bag 2 is pushed upward to leave enough space between the first connector 5 and the second connector 6. Then, the sealing ring 9 is placed into the sealing groove 8. Since the sealing groove 8 is located at the port position, it can thus accommodate the placement of the sealing ring 9. After the sealing ring 9 is placed, the second filter bag 2 is pulled downward so that the first connector 5 and the second connector 6 are abutted together, the annular boss 10 is pressed against the sealing ring 9, and the sealing groove 8 and the insertion groove 11 are inserted. Then, the locking block 13 is sleeved and rotated to complete the locking. After that, the first filter bag 1 and the flower plate 3 are docked. First, the sealing gasket 14 is placed on the top surface of the flower plate 3. Then, the top of the first filter bag 1 passes through the sealing gasket 14 and the mounting hole 4 in sequence. The bag head flange 7 is used to press the sealing gasket 14, and the pressing screw 21 is locked into the threaded hole 20 so that the top block 19 abuts against the flower plate 3 and the pressing screw 21 at both ends to fix the bag head flange 7 to the flower plate. At this time, the first filter bag 1 can be pressed and fixed on the flower plate 3.

[0041] The above are only the embodiments of the present utility model, and thus do not limit the patent scope of the present utility model. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present utility model.

Claims

1. A long metal filter bag, comprising a first filter bag (1) and a second filter bag (2), the first filter bag (1) is arranged above the second filter bag (2), a perforated plate (3) is arranged above the first filter bag (1), and mounting holes (4) are formed in the perforated plate (3), and it is characterized in that: The first filter bag (1) and the second filter bag (2) are connected by a first sealing and docking component, and the first filter bag (1) and the flower plate (3) are connected by a second sealing and docking component; the first sealing and docking component includes a first connector (5) and a second connector (6), the first connector (5) is arranged at the bottom position of the first filter bag (1), the second connector (6) is arranged at the top position of the second filter bag (2), when the first filter bag (1) is connected to the second filter bag (2), the second connector (6) is sleeved into the first filter bag (1) and abuts against the first connector (5); the second sealing and docking component includes a bag head flange (7) arranged on the flower plate (3), the top of the first filter bag (1) passes through the mounting hole (4) and is fixed to the flower plate (3) by the bag head flange (7), and a fixing member for pressing and fixing the bag head flange (7) to the flower plate (3) is also arranged on the bag head flange (7).

2. The long metal filter bag according to claim 1, characterized in that: The inner diameter of the first filter bag (1) is set to be larger than the outer diameter of the second filter bag (2), both the first connector (5) and the second connector (6) are arranged in an annular structure, the bottom surface of the second connector (6) abuts against the top surface of the first connector (5) after being sleeved into the first filter bag (1), a sealing groove (8) is formed on the top surface of the first connector (5), a sealing ring (9) is installed in the sealing groove (8), an insertion groove (11) is formed on the bottom surface of the second connector (6) by arranging an annular boss (10), when the first connector (5) abuts against the second connector (6), the annular boss (10) is in close contact with the sealing ring (9) in the sealing groove (8), and the groove wall of the sealing groove (8) close to the second filter bag (2) is inserted into the insertion groove (11).

3. The long metal filter bag according to claim 2, characterized in that: A locking block (13) is threadedly connected to the outer wall of the second filter bag (2) by threading an external thread (12), and the top surface of the locking block (13) abuts against the bottom surface of the first connector (5) when the first filter bag (1) and the second filter bag (2) are connected.

4. A long metal filter bag according to claim 2, characterized in that: The inner wall of the port position of the second connector (6) on the side away from the second filter bag (2) is arranged in an inclined flared structure.

5. A long metal filter bag according to claim 1, characterized in that: A sealing gasket (14) is arranged at the top of the first filter bag (1), and the sealing gasket (14) is located between the bag head flange (7) and the flower plate (3) after the top of the first filter bag (1) passes through the mounting hole (4).

6. The long metal filter bag according to claim 5, wherein: The fixing member includes an installation table (15). The installation table (15) is arranged on the inner ring part of the bag head flange (7). The installation table (15) is used to connect the bag head flange (7) and the body of the first filter bag (1). A through hole (16) adapted to the outer diameter of the installation table (15) is provided on the sealing gasket (14). When the bag head flange (7) is arranged on the sealing gasket (14), the end of the installation table (15) on the side away from the bag head flange (7) sequentially passes through the through hole (16) and the installation hole (4) and then extends below the flower plate (3). An installation cavity (17) is inwardly provided on the end of the installation table (15) extending below the flower plate (3). A top block (19) is rotatably connected to the installation cavity (17) by arranging a pin shaft (18). A threaded hole (20) is provided on the bag head flange (7). The threaded hole (20) is communicated with the installation cavity (17). A pressing screw (21) is threadedly connected into the threaded hole (20). One end of the top block (19) abuts against the pressing screw (21), and the other end abuts against the bottom wall of the flower plate (3) so as to be able to press and fix the bag head flange (7) and the flower plate (3).

7. A long metal filter bag according to claim 6, characterized in that: The top block (19) is arranged in a polygonal structure with a rectangle in the middle and protrusions symmetrically arranged at both ends. When the top block (19) fixes the bag head flange (7) and the flower plate (3), the protrusions on the corresponding side ends of the top block (19) abut against the bottom wall of the flower plate (3).

8. A long metal filter bag according to claim 6, characterized in that: The number of the installation cavities (17) is at least two. The installation cavities (17) are used to arrange the pin shaft (18), the top block (19), and the pressing screw (21). The installation cavities (17) are symmetrically distributed in an annular array with the center line of the bag head flange (7) as the array center on the inner ring part of the bag head flange (7).

Images