An assembled pleated filter bag and a pleated bag cage

Abstract

The utility model relates to an assembled pleated filter bag and a pleated bag cage, including an inner ring frame and a plurality of strut groups fixed to the inner ring frame, each strut group is arranged in sequence along the circumferential direction, each strut group includes a plurality of struts arranged in sequence along the axial direction, one end of the strut is fixed to the inner ring frame, and the other end of the strut extends radially away from the inner ring frame; a positioning connector detachably connected to the star-shaped recessed portion skeleton of the pleated filter bag is provided between two adjacent strut groups. The utility model sets the filter cloth on the bag cage, and detachably connects the star-shaped recessed portion of the pleated filter bag to the bag cage through the positioning connector, which not only forms a pleated structure and ensures the filtering area, but also realizes the detachability of the cloth bag and the bag cage, thereby realizing the reuse of the bag cage.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental protection equipment, in particular to an assembled pleated filter bag and a pleated bag cage. Background Art

[0002] The pleated filter cartridge uses spunbond polyester filter material as the surface filtration mechanism. The fiber sticking and pressing technology makes this filter material form many dense fine air flow channels, which has extremely high filtration efficiency, while maintaining relatively low running resistance, and significantly increases the air volume. In addition, the filter material has strong rigidity, so it does not need to rely on supporting materials as a pleated filter cartridge filter material. A single pleated filter cartridge replaces filter bags and cages, and basically achieves maintenance-free dust collectors. The disadvantage is that it cannot be used in places with high flue gas dust concentration.

[0003] Commonly used pleated bags, also called star-shaped dust bags, have concave and convex parts arranged alternately to form a star shape, and the star-shaped convex parts and star-shaped concave parts are used to increase the filtration area. The bag cage is inserted into the pleated bag. The advantage is that the filter cloth is cheap and can be used in places with high smoke dust concentration. The disadvantage is that the pleated filter bag needs to be flattened at the bag mouth and bag bottom, which wastes some filtration area. Oblong filter bags cannot be manufactured.

[0004] The current pleated filter cartridge structure is mostly an integrated design of pleated filter cloth and bag cage support, with no reusable parts. Once the filter cloth is damaged, it needs to be replaced as a whole. Due to its high unit price, the cost of use is high. Designing ordinary filter cloth and bag cage for pleated filter cartridge can solve the above problems. Utility Model Content

[0005] The utility model aims at the deficiencies of the prior art and provides an assembled pleated filter bag and a pleated bag cage. The filter cloth and the bag cage can be disassembled so that the bag cage can be reused.

[0006] The utility model is realized through the following technical solutions:

[0007] An assembled pleated bag cage comprises a bag cage body,

[0008] The pleated bag cage also includes one or both of the following:

[0009] A top plate fixed to the upper end of the bag cage body is matched with a top plate pressure plate, and an upper pressing gap is formed between the top plate pressure plate and the bag cage body for the upper end of the filter cloth to extend into;

[0010] A chassis is fixed at the lower end of the bag cage body, and a chassis pressure plate is matched with the chassis. A downward pressing gap is formed between the chassis pressure plate and the bag cage body for the lower end of the filter cloth to extend into.

[0011] That is to say, there are three states. The first one has a top plate and a top plate pressure plate; the second one has a bottom plate and a bottom plate pressure plate; the third one has both.

[0012] Preferably, the top plate or bottom plate and the corresponding pressure plate are of star-shaped structure.

[0013] Preferably, the bag cage body includes an inner ring frame and a plurality of strut groups fixed to the inner ring frame, the strut groups are arranged in sequence along the circumferential direction, and each strut group includes a plurality of struts arranged in sequence along the axial direction, one end of the strut is fixed to the inner ring frame, and the other end of the strut extends radially away from the inner ring frame; the inner ring frame and the strut groups form a bag cage body, and a pleated filter bag is provided on the bag cage body.

[0014] Preferably, the overall shape of the inner ring frame is arc-shaped at both ends and a rectangular shape in the middle, and a support rod is fixed outside the inner ring frame; the support rods at both ends of the inner ring frame are star-shaped, which is adapted to the shape of the filter bag; and the support rods on both sides of the middle inner ring frame are arranged in a straight line.

[0015] Preferably, the support rods on each inner ring frame of the bag cage body form a support rod group, and a positioning connector detachably connected to the star-shaped recessed portion skeleton of the pleated filter bag is provided between two adjacent support rod groups.

[0016] Preferably, the positioning connector includes a plurality of hooks which are arranged at intervals along the axial direction and connected to the inner ring frame, and one end of the hook away from the inner ring frame is hung on a star-shaped bottom hanging point of the pleated filter bag.

[0017] Preferably, the positioning connector includes a plurality of fixing rods extending axially and arranged circumferentially, the fixing rods sequentially passing through a star-shaped bottom frame located on the same star-shaped recessed portion of the pleated filter bag, and the fixing rods are fixedly arranged relative to the pleated bag cage.

[0018] A pleated filter bag corresponding to the above-mentioned assembled pleated bag cage, the pleated filter bag has a star-shaped bottom frame or\ and a star-shaped top frame.

[0019] The star-shaped bottom and top refer to the star-shaped structure formed on the cross section of the pleated cloth bag after the pleated cloth bag is cross-cut. The star-shaped bottom refers to the concave part of the pleats, and the star-shaped top refers to the convex part of the pleats. The corresponding star-shaped bottom skeleton and top skeleton are located at corresponding positions.

[0020] Similarly, there are three situations. The first situation contains a star-shaped bottom skeleton; the second situation contains a star-shaped top skeleton; and the third situation contains both skeletons.

[0021] Preferably, the star-shaped bottom frame of the pleated filter bag is provided with hanging points.

[0022] The manufacturing method of the pleated filter bag corresponding to the above-mentioned assembled pleated bag cage is as follows: on the flat filter cloth, a cloth strip is sewn as a hanging point; the filter cloth is sewn into a cylinder with openings at both ends, and the hanging point is located on the inner side of the cylindrical filter cloth.

[0023] Assembly method of the pleated filter bag corresponding to the above-mentioned assembled pleated bag cage:

[0024] Put the cylinder on the pleated bag cage and fix it on the bottom plate at the lower end of the bag cage body. The bottom plate is matched with the bottom plate pressure plate. A lower pressing gap is formed between the bottom plate pressure plate and the bag cage body for the lower end of the filter cloth to extend into. Bolts press the bottom plate pressure plate and the bottom plate tightly.

[0025] The inner wall of the cylinder is turned downward and outward, and the hanging point is outside. The first hanging point at the bottom is hung with the first hook at the bottom of the bag cage. The inner wall of the cylinder is turned inward partly, and the second hanging point at the bottom is hung with the second hook at the bottom of the bag cage. Similarly, hang the hanging points layer by layer.

[0026] The top plate is fixed to the upper end of the bag cage body, and a top plate pressure plate is matched with the top plate. An upper compression gap is formed between the top plate pressure plate and the bag cage body for the upper end of the filter cloth to extend into, and bolts compress the top plate pressure plate and the top plate;

[0027] The pleated filter bag and the pleated bag cage are assembled as a whole, extending into the hole of the flower plate and entering the dust removal box; the top plate pressure plate presses the sealing gasket to fit the top of the flower plate, and the bolts press the top plate pressure plate onto the flower plate.

[0028] This patent provides an assembled pleated filter bag and a pleated bag cage, including an inner ring frame and a plurality of strut groups fixed to the inner ring frame, each strut group is arranged in sequence along the circumferential direction, and each strut group includes a plurality of struts arranged in sequence along the axial direction. One end of the strut is fixed to the inner ring frame, and the other end of the strut extends radially away from the inner ring frame and is connected to the vertical ribs of the bag cage; the inner ring frame and the strut group form a bag cage body, and a pleated filter bag is sleeved on the bag cage body.

[0029] The pleated bag cage also includes a star-shaped top plate fixed to the upper end of the bag cage body and a star-shaped bottom plate fixed to the lower end of the bag cage body. An upper pressing seam for the upper end of the filter cloth to extend into is formed between the star-shaped top plate pressure plate and the bag cage body, and a lower pressing seam for the lower end of the filter cloth to extend into is formed between the star-shaped bottom plate lower pressure plate and the bag cage body.

[0030] The bottom of the bag cage is a star-shaped chassis, and the bag bottom is pressed between the star-shaped chassis and the star-shaped chassis pressure plate, and the star-shaped chassis and the star-shaped pressure plate are fixed by bolts. The bolts and nuts are used together to press the star-shaped chassis, the star-shaped pressure plate and the filter cloth at the bottom of the bag. At the same time, the bottom of the filter cloth cylinder is shaped into a star shape, and no ash is leaked.

[0031] Star-shaped bottom plate, star-shaped pressure plate, filter cloth and gasket to increase sealing. The star-shaped top plate fixed on the bag cage is star-shaped, and the filter cloth star-shaped top plate pressure plate is star-shaped. Bolts and nuts are used to press the filter cloth cylinder onto the star-shaped top plate of the bag cage, and the top of the filter cloth cylinder is shaped into a star shape. The star-shaped top plate pressure plate is connected to the dust collector plate.

[0032] The snap ring is a simple pressure plate.

[0033] This solution sets a support rod on the bag cage to support the star-shaped protrusion of the pleated filter bag. The star-shaped concave part of the pleated filter bag enters between the circumferentially adjacent support rods to form a pleated structure, thereby ensuring the filtering area. The pleated filter bag is set on the bag cage, and the star-shaped bottom plate and the star-shaped bottom plate pressure plate press the filter cloth to form the bag bottom, and the star-shaped top plate and the star-shaped top plate pressure plate press the filter cloth to form the bag opening, thereby realizing the detachability of the filter cloth and the bag cage. After the filter cloth is damaged, the bag cage can be reused. The filter cloth is made into a cylindrical shape, and the bag bottom and bag opening are not sewn, which is convenient for production and reduces costs.

[0034] The shape of the inner ring frame is adapted to the shape of the pleated filter bag, so that the shape of the inner ring frame adapts to the shape of the filter bag.

[0035] The pleated filter bag has a star-shaped bottom frame, which is fixed to the star-shaped concave portion of the pleated filter bag. The optimization scheme is convenient for improving the shaping effect of the star-shaped concave portion by setting the star-shaped bottom frame.

[0036] The pleated filter bag has a star-shaped top frame, which is fixed to the star-shaped raised portion of the pleated filter bag. The optimization scheme is convenient for improving the shaping effect of the star-shaped raised portion by setting the star-shaped top frame.

[0037] The connection method between the pleated filter bag and the star-shaped bottom frame and the star-shaped top frame is one or more of resin curing, bonding, bolt connection, riveting and sewing. Resin curing refers to the use of resin (glue) to locally cure the filter material to form a rigid frame. The star-shaped top frame and the star-shaped bottom frame can be butt-jointed to form an integral star-shaped frame. The star-shaped top frame and the star-shaped bottom frame are made of metal, heat-resistant plastic, or heat-resistant rubber.

[0038] A positioning connector is provided between two adjacent support rod groups, which is detachably connected to the star-shaped concave part frame of the pleated filter bag. This optimization scheme is achieved by putting the pleated filter bag on the bag cage, and detachably connecting it to the concave part frame through the positioning connector, which not only shapes the concave part of the pleated filter bag, but also realizes the detachability of the filter cloth and the bag cage. After the filter cloth is damaged, the bag cage can be reused.

[0039] The positioning connector includes a plurality of hooks arranged at intervals along the axial direction and connected to the inner ring frame, and the end of the hook away from the inner ring frame is hung on the star-shaped recessed part skeleton of the pleated filter bag. This optimization scheme connects the pleated filter bag to the inner ring frame through the hook, which has a simple structure and is easy to install and disassemble; the hook is an elastic hook, and the elastic hook can be used to make the filter cloth shake when the compressed air blows the dust in the reverse direction, thereby ensuring the dust blowing effect.

[0040] The positioning connector includes a plurality of fixing rods extending in the axial direction and arranged in the circumferential direction, the fixing rods sequentially pass through the frame located on the same star-shaped recessed portion of the pleated filter bag, and the fixing rods are relatively fixedly arranged with the pleated bag cage. This optimization scheme uses the fixing rods to shape the star-shaped recessed portion of the pleated filter bag, and the shaping effect is good, which avoids the separation between the positioning connector and the pleated filter bag.

[0041] The positioning connector includes a plurality of vertical rods extending in the axial direction and arranged in the circumferential direction, the vertical rods are located in the star-shaped concave part of the pleated filter bag, and the vertical rods are located on the side of the pleated filter bag away from the inner ring frame. This optimization scheme uses the side of the vertical rod to form a lateral support for the star-shaped concave part of the pleated filter bag, increases the contact length between the positioning connector and the pleated filter bag, and further improves the reliability of the shaping of the concave part of the pleated filter bag.

[0042] The vertical rod is provided with a fixed sleeve, and the fixed sleeve is fixedly connected to the star-shaped recessed portion of the pleated filter bag. By providing the fixed sleeve, the surface bag and the vertical rod are rubbed against each other, which is conducive to extending the service life of the bag.

[0043] The inner ring frame and the support rod group form a bag cage body, and the pleated bag cage also includes a top plate pressure plate fixed to the upper end of the bag cage body and a bottom plate pressure plate fixed to the lower end of the bag cage body. An upper pressing seam for the upper end of the filter cloth to extend into is formed between the top plate pressure plate and the bag cage body, and a lower pressing seam for the lower end of the filter cloth to extend into is formed between the bottom plate pressure plate and the bag cage body. This optimization scheme is convenient for fixing the upper and lower ends of the filter cloth by setting the top plate pressure plate and the bottom plate pressure plate, and is convenient for disassembly.

[0044] The inner ring frame is in an oblong shape as a whole; the inner ring frame is partially star-shaped, adapted to the shape of the filter bag, and the support rods fixed to the left side of the inner ring frame and the support rods fixed to the right side of the inner ring frame are arranged along a straight line respectively. The inner ring frame of this optimization scheme is in an oblong shape as a whole, which is conducive to increasing the filtering area.

[0045] The present invention also provides an assembled pleated filter bag for the above-mentioned assembled pleated bag cage, wherein the pleated filter bag comprises multiple layers of filter cloth arranged in sequence from the inside to the outside, and a catalyst is arranged in the inner layer of the filter cloth.

[0046] The pleated filter bag filter cloth of this scheme is multi-layered, and the outer filter cloth is used for smoke and dust filtration. The inner filter cloth contains a catalyst, which can remove NOX and dioxins.

[0047] The beneficial effects of the utility model are as follows: the filter cloth is sleeved on the bag cage, and the star-shaped recessed portion of the pleated filter bag is detachably connected to the bag cage through a positioning connector, which not only forms a pleated structure and ensures the filtering area, but also realizes the detachability of the cloth bag and the bag cage, thereby realizing the reuse of the bag cage. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a top cross-sectional view of the pleated bag cage of Example 1;

[0049] Figure 2 It is a top cross-sectional schematic diagram of the connection between the pleated bag cage and the pleated filter bag of Example 1;

[0050] Figure 3 It is a side view schematic diagram of the connection between the pleated bag cage and the pleated filter bag of the first embodiment;

[0051] Figure 4 for Figure 3 The enlarged image at point I in the middle;

[0052] Figure 5 It is a top view and cross-sectional diagram of the connection between the pleated bag cage and the pleated filter bag of the second embodiment;

[0053] Figure 6 It is a side cross-sectional schematic diagram of the connection between the pleated bag cage and the pleated filter bag of the second embodiment;

[0054] Figure 7 for Figure 6 The enlarged image at point I in the middle;

[0055] Figure 8 It is a top view and cross-sectional diagram of the connection between the pleated bag cage and the pleated filter bag of the third embodiment;

[0056] Fig. 9 It is a side view schematic diagram of the connection between the pleated bag cage and the pleated filter bag of the third embodiment;

[0057] Fig.10 for Fig. 9 The enlarged image at point I in the middle;

[0058] Fig.11 It is a top cross-sectional view of the pleated bag cage of the fourth embodiment;

[0059] Fig.12 It is a top view and cross-sectional diagram of the connection between the pleated bag cage and the pleated filter bag of the fourth embodiment;

[0060] Fig.13 It is a schematic diagram of the connection between the star-shaped inner ring frame and the pleated filter bag;

[0061] Fig.14 It is a schematic diagram of the structure of a pleated filter bag with a catalyst;

[0062] As shown in the figure:

[0063] 1. Support rod, 2. Vertical rib, 3. Hook, 4. Inner ring frame, 5. Star-shaped recessed part, 6. Star-shaped bottom frame, 7. Star-shaped raised part, 8. Pleated filter bag, 9. Flower plate, 10. Flower plate connecting plate, 11. Top plate pressure plate, 12. Fixed rod, 13. Fixed nut, 14. Vertical rod, 15. Fixed sleeve, 16. Semi-cylindrical frame, 17. Middle frame, 18 Catalyst. DETAILED DESCRIPTION

[0064] In order to clearly illustrate the technical features of this solution, this solution is described below through specific implementation methods. The cloth bags adapted to the pleated bag cages in the following embodiments are all pleated filter bags 8, which include a plurality of star-shaped recessed portions 5 and star-shaped raised portions 7 alternately distributed along the circumferential direction, the star-shaped recessed portions are fixedly connected to a frame 6, and the frame of the star-shaped recessed portions is provided with a connecting hole that penetrates along the axial direction, and the material of the frame is metal, or heat-resistant plastic, or heat-resistant rubber.

[0065] The pleated filter bag has a star-shaped bottom frame and a star-shaped top frame. The connection method between the pleated filter bag and the star-shaped bottom frame and the star-shaped top frame is one or more of resin curing, bonding, bolt connection, riveting and sewing.

[0066] An example of using Velcro: the fleece side of the Velcro is fixed to the filter cloth, the hook side of the Velcro is fixed to the frame, and the hook side sticks to the fleece side, thereby fixing the frame.

[0067] Use resin (glue) to locally solidify the filter material into shape, making it rigid and forming a skeleton.

[0068] The skeleton shapes the pleated filter bag into a more accurate star shape, reducing dust accumulation and ensuring the dust blowing effect.

[0069] The pleated filter bag includes multiple layers of filter cloth arranged from the inside to the outside, and the inner filter cloth is provided with a catalyst. Depending on the type of catalyst, it is used to remove NOX, dioxin, etc. The multiple layers of filter cloth can be tightly connected, such as needle connection. It can also be loosely connected, such as using a bag cage and a frame, using a star-shaped top plate pressure plate, and a star-shaped bottom plate pressure plate to fix the inner filter cloth.

[0070] After disassembling the star-shaped top plate pressure plate and the star-shaped bottom plate pressure plate, the outer filter cloth of the catalyst filter cloth bag can be removed separately, which is conducive to reuse. When blowing dust from the bag, the high-speed wind blows the inner filter cloth to transmit the vibration to the outer filter cloth; due to the high air permeability of the inner filter cloth, the high-speed wind will also pass through the inner filter cloth to the outer filter cloth, ensuring that the outer dust filter cloth removes dust. The outer dust filter cloth and the inner catalyst filter cloth have different lifespans. Using loose connections, they can be disassembled and replaced separately, which is conducive to reducing costs. Remove the inner catalyst filter cloth separately to facilitate catalyst regeneration.

[0071] Embodiment 1

[0072] like Figure 1The assembled pleated bag cage shown in the figure includes an inner ring frame 4 and a plurality of strut groups fixed to the inner ring frame, each strut group is arranged in sequence along the circumferential direction, and each strut group includes a plurality of struts 1 arranged in sequence along the axial direction, one end of the strut 1 is fixed to the inner ring frame 4, and the other end of the strut extends radially away from the inner ring frame, and the end of the strut away from the inner ring frame is fixed to a vertical rib 2 extending in the axial direction. A positioning connector detachably connected to the star-shaped recessed portion skeleton of the pleated filter bag is provided between two adjacent strut groups.

[0073] The positioning connector of this embodiment includes a plurality of hooks 3 arranged at intervals along the axial direction and connected to the inner ring frame, one end of the hook 3 is fixedly connected to the inner ring frame, and the end of the hook away from the inner ring frame is hung on the star-shaped recessed portion skeleton of the pleated filter bag, the hook body of the hook is adapted to the connecting hole on the recessed portion skeleton, and a support ring for fixing the hook is fixedly provided on the inner ring frame.

[0074] As an optimization solution, the hook of this embodiment adopts an elastic hook, and the retractable characteristics of the elastic hook are used to ensure the shaking dust removal during the back blowing of compressed gas. The skeleton size of this embodiment is very small, the hook is elastic and the number is small, so the filter cartridge is still soft, and when the compressed air blows back, the bag can form a shake to ensure the dust blowing effect.

[0075] The inner ring frame and the support rod group form the bag cage body, the cross section of the bag cage body is generally circular, and the bag cage body is covered with a pleated filter bag. Figure 3 As shown, the pleated bag cage also includes a top plate pressure plate 11 fixed to the upper end of the bag cage body and a bottom plate pressure plate fixed to the lower end of the bag cage body, an upper pressing seam for the upper end of the filter cloth to extend into is formed between the top plate pressure plate 11 and the top plate, and a lower pressing seam for the lower end of the filter cloth to extend into is formed between the bottom plate pressure plate and the bottom plate. The top plate and the top plate pressure plate are connected by bolts, and the bottom plate and the bottom plate pressure plate are connected by bolts so as to be disassembled and ensure the reuse of the bag cage.

[0076] During installation, the filter cloth of this embodiment is sewn into a cylindrical shape. When the pleated filter bag is put on the bag cage, the outer vertical ribs of the bag cage push up the star-shaped protrusion of the pleated filter bag into a star shape. A star-shaped bottom frame is arranged at the star-shaped concave part of the pleated filter bag. The star-shaped concave part of the pleated filter bag and the arranged star-shaped bottom frame enter the gap between the vertical ribs of the bag cage. The star-shaped bottom frame shapes the star-shaped concave part of the bag into a star shape. At the same time, an elastic hook is arranged on the inner support ring of the bag cage to hook the connection hole on the star-shaped concave part frame to ensure that the star-shaped bottom is reliably formed. Because the diameter of the pleated filter cartridge before pleating is larger than the diameter of the bag cage, you can reach out and hang the hooks on the frame layer by layer.

[0077] The bag cage bottom plate is star-shaped, and the bottom plate pressure plate is star-shaped. Bolts and nuts are used to press the filter cloth cylinder onto the bag cage bottom plate, and the bottom of the filter cloth cylinder is shaped into a star shape without leaking ash. The top plate is star-shaped, and the top plate pressure plate is star-shaped. Bolts and nuts are used to press the filter cloth cylinder onto the top plate, and the top of the filter cloth cylinder is shaped into a star shape without leaking ash. The bottom plate of the pleated filter cartridge is star-shaped, which can increase the cross-sectional area of ​​the rising flue gas, reduce the rising speed of the airflow, facilitate the sedimentation of ash, and improve the dust removal efficiency. Optionally, gaskets can be added between the bag cage bottom plate, bottom plate pressure plate, and filter cloth to increase the sealing.

[0078] When replacing the filter cloth, loosen the bolts and nuts at the top and bottom of the filter cartridge, remove the bottom plate and top plate. Pull the old filter cloth in the unhooking direction to disengage it from the bag cage. Repeat the above steps and replace with a new filter cloth.

[0079] The bag cage can be made into several sections and connected in series by means of buckles, bolts, etc.

[0080] Embodiment 2

[0081] The difference between this embodiment and the first embodiment is that the bag cage fixes the concave part of the pleated filter bag. The positioning connector of this embodiment includes a plurality of fixing rods 12 extending in the axial direction and arranged in the circumferential direction. The fixing rods 12 sequentially pass through the skeleton located on the same star-shaped concave part of the pleated filter bag, and the fixing rods are relatively fixedly arranged with the pleated bag cage. The outer diameter of the fixing rod is adapted to the aperture of the connection hole on the concave part skeleton. The upper and lower ends of the fixing rod are respectively connected with fixing nuts 13 by threads, and the fixing rod and the bag cage body are relatively fixed by the pressing effect of the upper and lower fixing nuts.

[0082] In order to facilitate installation and disassembly, the top of the bag cage in this embodiment is fixedly connected to the flower plate connecting plate 10 by bolts, and the flower plate connecting plate 10 is fixedly connected to the flower plate 9 on the dust removal box body. Figure 6 As shown, the fixing rod passes through the flower plate connecting plate upward, the fixing nut at the upper end is pressed downward on the top surface of the flower plate connecting plate, and the fixing nut at the lower end is pressed upward on the chassis pressure plate.

[0083] When this embodiment is in use, the filter cloth is sewn into a cylindrical shape. When the pleated filter bag is put on the bag cage, the outer vertical ribs of the bag cage push up the star-shaped protrusion of the pleated filter bag into a star shape. A star-shaped bottom frame is arranged in the star-shaped recessed part of the pleated filter bag. The star-shaped recessed part of the pleated filter bag and the arranged star-shaped bottom frame enter the gap between the vertical ribs of the bag cage. The star-shaped bottom frame shapes the star-shaped recessed part of the bag into a star shape. At the same time, a fixing rod is arranged in the bag cage, and the fixing rod passes through the hole on the star-shaped bottom frame to ensure that the star-shaped bottom is reliably formed. The fixing rod is fixed to the bottom plate of the bag cage and the top plate with a nut, and the fixing rod is tightened. Before the pleated filter cartridge is not pleated, the diameter is larger than the diameter of the bag cage, and you can reach in and pass the fixing rod through the hole of the frame layer by layer.

[0084] When replacing the filter cloth, loosen the fixing nuts at the upper and lower ends of the fixing rod, loosen the bolts and nuts of the bottom plate and top plate, remove the bottom plate and top plate, pull out the fixing rod, pull out the bag cage, repeat the above steps and replace the new filter cloth.

[0085] Embodiment 3

[0086] The difference between this embodiment and the second embodiment is that the bag cage fixes the concave part of the pleated filter bag. The positioning connector of this embodiment includes a plurality of vertical rods 14 extending in the axial direction and arranged in the circumferential direction. The vertical rods 14 are located in the star-shaped concave part of the pleated filter bag, and the vertical rods are located on the side of the pleated filter bag away from the inner ring frame, forming a lateral support for the star-shaped concave part of the pleated filter bag. In order to prevent the vertical rods from causing wear on the cloth bag, a fixing sleeve 15 is sleeved on the vertical rod of this embodiment, and the fixing sleeve 15 is fixedly connected to the star-shaped concave part of the pleated filter bag.

[0087] like Fig. 9 As shown, the upper and lower ends of the vertical rod of this embodiment are respectively connected with fixing nuts through threads, and the relative fixation of the vertical rod and the bag cage body is achieved by the compression effect of the upper and lower fixing nuts. Specifically, the vertical rod passes through the flower plate connecting plate upward, and the fixing nut at the upper end is pressed downward on the top surface of the flower plate connecting plate, and the fixing nut at the lower end is pressed upward on the chassis pressure plate.

[0088] When the present embodiment is in use, the filter cloth is sewn into a cylindrical shape. When the pleated filter bag is put on the bag cage, the outer vertical ribs of the bag cage push up the star-shaped protrusion of the pleated filter bag into a star shape. A vertical rod is arranged in the star-shaped concave part of the pleated filter bag, and the vertical rod shapes the star-shaped concave part of the bag into a star shape. At the same time, a fixing sleeve is arranged in the star-shaped concave part of the pleated filter bag, and the vertical rod passes through the fixing sleeve to ensure that the star-shaped bottom is reliably formed and to prevent the filter cloth from being damaged by excessive friction with the vertical rod. The bag cage has little restraint on the filter cloth, and the filter cartridge is still soft. When compressed air or high-speed gas is blown in the reverse direction, the bag can shake to ensure the blowing effect.

[0089] When replacing the filter cloth, remove the fixing nuts at both ends of the vertical rod, loosen the bolts and nuts of the bottom plate and top plate of the filter cartridge, and remove the bottom plate and top plate. Pull out the vertical rod and pull the old filter cloth out of the bag cage. Repeat the above steps and replace the new filter cloth.

[0090] The material of the fixing sleeve is cloth, metal, or heat-resistant plastic, or heat-resistant rubber. The fixing method of the fixing sleeve and the cloth bag is one or more of bonding, laminating, snapping, bolt connection, riveting, mechanical connection, and sewing.

[0091] Embodiment 4

[0092] The difference between this embodiment and the third embodiment is that the cross-section of the bag cage body is oblong as a whole, so that the pleated filter cartridge formed by the pleated bag cage and the pleated filter bag is oblong as a whole, which is beneficial to increase the filtering area of ​​the filter cloth. The overall shape of the inner ring frame is oblong; the inner ring frame is partially star-shaped, adapted to the shape of the filter bag, and the support rods fixed to the left side of the inner ring frame and the support rods fixed to the right side of the inner ring frame are arranged along straight lines respectively. Using a star-shaped inner ring frame, the shape of the inner ring frame is adapted to the shape of the pleated filter bag, which can make the space inside the filter bag larger, which is beneficial to reduce the obstruction to the high-speed wind for soot blowing; it is beneficial to arrange the soot blowing mechanism inside the filter bag. Fig.11 As shown, the inner ring frame includes an intermediate frame 17, and two semi-cylindrical frames 16 respectively fixed to the front and rear ends of the intermediate frame, and the arcs of the two semi-cylindrical frames are arranged oppositely; the support rod fixed to the left side of the intermediate frame and the support rod fixed to the right side of the intermediate frame are arranged along a straight line respectively.

[0093] The bag cage of the utility model has good overall rigidity, and the pleated filter cartridge can be made into a large diameter and a long length as required. The bag cage can be reused, and the filter cloth uses the existing materials on the market, which has a simple structure and low cost. The pleat angle can be made larger, easy to clean, and can adapt to high-temperature flue gas and flue gas with high dust concentration, which can promote the market promotion of pleated filter cartridges.

[0094] The above description is applicable not only to circular pleated filter cartridges but also to pleated filter cartridges of various shapes, such as square and oval, and also to metal filter cartridges. The technical features not described in the present utility model can be realized by or using the existing technology, and will not be repeated here; the above embodiments and drawings are only used to illustrate the technical solution of the present utility model and are not limitations of the present utility model. The present utility model is described in detail with reference to the preferred implementation mode. Ordinary technicians in this field should understand that the changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present utility model do not deviate from the purpose of the present utility model, and should also fall within the scope of protection of the claims of the present utility model.

Claims

1. A pleated bag cage, comprising a bag cage body, characterized in that: The pleated bag cage also includes one or both of the following: A top plate fixed to the upper end of the bag cage body is matched with a top plate pressure plate, and an upper pressing gap is formed between the top plate pressure plate and the bag cage body for the upper end of the filter cloth to extend into; A chassis is fixed at the lower end of the bag cage body, and a chassis pressure plate is matched with the chassis. A downward pressing gap is formed between the chassis pressure plate and the bag cage body for the lower end of the filter cloth to extend into.

2. The pleated bag cage according to claim 1, characterized in that: The top plate or bottom plate and the pressure plate matched with each other are star-shaped structures.

3. The pleated bag cage according to claim 1, characterized in that: The bag cage body includes an inner ring frame and a plurality of strut groups fixed to the inner ring frame, the strut groups are arranged in sequence along the circumferential direction, and each strut group includes a plurality of struts arranged in sequence along the axial direction, one end of the strut is fixed to the inner ring frame, and the other end of the strut extends radially away from the inner ring frame; the inner ring frame and the strut groups form a bag cage body, and a pleated filter bag is sleeved on the bag cage body.

4. The pleated bag cage according to claim 3, characterized in that: The overall shape of the inner ring frame is arc-shaped at both ends and a rectangular shape in the middle. A support rod is fixed outside the inner ring frame. The support rods at both ends of the inner ring frame are star-shaped, which adapts to the shape of the filter bag. The support rods on both sides of the middle inner ring frame are arranged in a straight line.

5. The pleated bag cage according to claim 3 or 4, characterized in that: The support rods on each inner ring frame of the bag cage body form a support rod group, and a positioning connector detachably connected to the star-shaped recessed part frame of the pleated filter bag is provided between two adjacent support rod groups.

6. The pleated bag cage according to claim 5, characterized in that: The positioning connector comprises a plurality of hooks which are arranged at intervals along the axial direction and connected to the inner ring frame, and one end of the hook away from the inner ring frame is hung on the star-shaped bottom hanging point of the pleated filter bag.

7. The pleated bag cage according to claim 5, characterized in that: The positioning connector includes a plurality of fixing rods extending axially and arranged circumferentially, the fixing rods sequentially passing through a star-shaped bottom frame located on the same star-shaped recessed portion of the pleated filter bag, and the fixing rods are fixedly arranged relative to the pleated bag cage.

8. An assembled pleated filter bag made from the pleated bag cage according to claim 7, characterized in that: The pleated filter bag has a star-shaped bottom frame or\ and a star-shaped top frame.

9. The assembled pleated filter bag according to claim 8, characterized in that: The star-shaped bottom frame of the pleated filter bag is provided with hanging points.

Images