Back-blowing filter element capable of preventing back-blowing deformation

Abstract

The utility model discloses a blowback filter element capable of preventing blowback deformation, and relates to the technical field related to filtration. The filter comprises an upper pressing plate, a lower pressing plate, a framework, an outer framework, two center rings and an inner framework, the inner framework is jointly fixed between the two center rings, and a second inner filter layer and a first inner filter layer are sequentially arranged on the inner wall of the inner framework; the inner framework is coated with a supporting net in a sleeving mode, an outer framework is arranged outside the supporting net, and the outer wall of the outer framework is sequentially sleeved with a first outer filtering layer and a second outer filtering layer; an upper pressing plate is screwed outside the upper central ring, and a lower pressing plate is screwed outside the lower central ring; a reinforcing framework is arranged outside the outer filter layer II. Through the arrangement of the inner framework, the outer framework, the upper pressing plate, the lower pressing plate, the supporting net, the central ring and the reinforcing framework, the problems that a filter element with deformation resistance is lacked during back flushing, and a filter material of the filter element is lacked of a supporting structure and is easy to deform are solved.

Description

Technical Field

[0001] This utility model belongs to the field of filtration-related technology, and in particular relates to a backflush filter element that prevents backflush deformation. Background Technology

[0002] Back-blowing filter cartridges are an important component of back-blowing filter dust collectors. Their working principle is as follows: dust-laden gas is drawn into the housing by a fan through a suction pipe, enters the filter bags or cartridges for filtration, and dust particles are trapped on the surface. The filtered, purified gas is discharged through the outlet. Then, back-blowing occurs in the opposite direction to the inlet air, blowing off the dust and other particles adhering to the filter cartridge, thus achieving back-blowing cleaning and ensuring filtration efficiency and continuous stable operation of the equipment. However, back-blowing filter cartridges still have the following drawbacks in practical use:

[0003] Most filters meet the requirements in terms of accuracy and dirt holding capacity. However, in air filtration operations, the dust contained in the air can clog the pores of the filter media. Therefore, it is necessary to replace the filter element regularly or perform backflushing on the filter element. However, the filter media used to filter air is usually thin. Under the strong backflushing action, the filter media can easily be damaged or deformed. Therefore, it is necessary to ensure that the filter media has sufficient resistance to deformation during backflushing.

[0004] Secondly, because the filter element needs to meet the requirement of filtering dust and particulate matter in the air, when the air to be filtered enters the filter element, it passes through the filter element, the particles are blocked, and clean air passes through. However, for air filter elements, the filter material usually does not have structural support. During backflushing and after long-term use, the impact of particles in the air will cause the filter material to deform and become unusable. The filter material of conventional filter elements lacks a support structure. Utility Model Content

[0005] The purpose of this utility model is to provide a backflush filter element that prevents deformation during backflushing. By setting an inner skeleton, an outer skeleton, an upper pressure plate, a lower pressure plate, a support mesh, a central ring, and a reinforcing skeleton, it solves the problems of filter elements lacking resistance to deformation during backflushing and the filter media lacking a support structure and being prone to deformation.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model relates to a backflush filter element for preventing deformation caused by backflush, comprising an upper pressure plate, a lower pressure plate, a frame, an outer frame, two central rings, and an inner frame. The two central rings are arranged vertically, and the inner frame is fixed between the two central rings. An inner filter layer two and an inner filter layer one are sequentially arranged on the inner wall of the inner frame. A support mesh is wrapped around the inner frame, and the upper and lower ends of the support mesh are welded and fixed to the opposite surfaces of the two central rings, respectively. An outer frame is arranged outside the support mesh, and an outer filter layer one and an outer filter layer two are sequentially arranged on the outer wall of the outer frame. An upper pressure plate is screwed onto the upper central ring, and a lower pressure plate is screwed onto the lower central ring. A reinforcing frame is arranged outside the outer filter layer two.

[0008] Furthermore, the upper and lower ends of the inner filter layer one and the inner filter layer two are welded and fixed to the opposite surfaces of the two central rings, respectively, and the inner skeleton is provided with equidistant through holes two through the periphery.

[0009] Furthermore, the upper and lower ends of the outer periphery of the inner frame are fixed with connecting rods arranged in a ring array, and the end of the connecting rod away from the inner frame passes through the support mesh and is welded and fixed to the inner wall of the outer frame.

[0010] Furthermore, the upper ends of the outer frame, outer filter layer one, and outer filter layer two are all welded and fixed to the bottom surface of the upper pressure plate, and the lower ends of the outer frame, outer filter layer one, and outer filter layer two are all welded and fixed to the top surface of the lower pressure plate.

[0011] Furthermore, the central ring is hollow inside, the lower pressure plate has an inlet with an inner diameter equal to that of the central ring, the upper pressure plate is closed at the top, and the thickness of both the upper and lower pressure plates is greater than the thickness of the central ring.

[0012] Furthermore, the outer frame has equidistantly distributed through holes on its periphery, and the inner diameters of the upper and lower pressure plates are larger than the inner diameter of the outer filter layer.

[0013] Furthermore, the reinforcing frame includes four reinforcing rings distributed vertically, and all reinforcing rings are fixed with reinforcing sheets arranged in a ring array. The reinforcing rings are sleeved inside the outer filter layer two.

[0014] This utility model has the following beneficial effects:

[0015] This invention solves the problem of filter cartridges lacking resistance to deformation during backflushing by setting up an inner skeleton, an outer skeleton, an upper pressure plate, a lower pressure plate, a support mesh, and a central ring. This invention employs a double-layer skeleton, combining an inner and outer skeleton. The inner skeleton contains two inner filter layers, and the outer skeleton contains two outer filter layers, achieving multi-layer filtration. The central ring, upper pressure plate, and lower pressure plate provide fixation. The inner and outer filter layers use micron-level metal fibers, while the inner and outer filter layers use a composite of micron-level powder and a metal mesh. This system is designed to provide higher-intensity interception. During backflushing, the air blows from the outermost side towards the outer filter layer 1 and outer filter layer 2, blowing off the dust adhering to their inner sides. However, the strong wind is partially blocked by the outer frame, protecting the outer filter layer 1 and outer filter layer 2 and preventing excessive deformation. Secondly, for the dust adhering to the inner filter layer 1 and inner filter layer 2 on the inner side of the inner frame, the backflushing pipe is inserted from the inlet and blown towards the inner walls of the inner filter layer 1 and inner filter layer 2 to achieve dust removal. The strong wind blowing towards the inner filter layer 1 and inner filter layer 2 is blocked by the inner frame, preventing deformation and damage.

[0016] This invention solves the problem of insufficient support structure and easy deformation of filter media by setting an inner skeleton, an outer skeleton, a reinforcing skeleton, and a central ring. The inner skeleton, inner filter layer one, and inner filter layer two are all welded and fixed to the central ring. The inner skeleton and outer skeleton are connected by connecting rod welding to enhance stability and structural strength. The upper and lower ends of the outer skeleton, outer filter layer one, and outer filter layer two are fixed to the upper and lower pressure plates respectively to maintain structural stability. A support mesh is also set between the two central rings to further enhance structural stability and provide a certain filtration effect. The outermost reinforcing skeleton further enhances structural stability and is suitable for high-intensity filtration, meeting high-intensity requirements. The overall structure of the filter element is strengthened, and the reinforcing skeleton is located on the outermost layer to prevent deformation of outer filter layer one and outer filter layer two due to external factors. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0018] Figure 1 A perspective view of a backflush filter element designed to prevent backflush deformation;

[0019] Figure 2 A bottom perspective view of a backflush filter element designed to prevent deformation from backflush.

[0020] Figure 3 Structural diagram to strengthen the skeleton;

[0021] Figure 4 This is a cross-sectional view of the outer frame and its connection to the upper and lower pressure plates.

[0022] Figure 5 This is a cross-sectional view of the internal skeleton and its connection to the central ring.

[0023] Figure 6 This is a structural diagram of the support network.

[0024] Figure label:

[0025] 1. Upper pressure plate; 2. Lower pressure plate; 201. Inlet; 3. Reinforcing frame; 301. Reinforcing ring; 302. Reinforcing sheet; 4. Outer frame; 401. Outer filter layer one; 402. Outer filter layer two; 403. Through hole one; 5. Central ring; 6. Support mesh; 7. Inner frame; 701. Inner filter layer one; 702. Inner filter layer two; 703. Through hole two; 704. Connecting rod. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0027] Please see Figure 1-6 As shown, this utility model is a backflush filter element to prevent backflush deformation, including an upper pressure plate 1, a lower pressure plate 2, a frame, an outer frame 4, two central rings 5, and an inner frame 7. The two central rings 5 ​​are distributed vertically, and the inner frame 7 is fixed between the two central rings 5. The inner wall of the inner frame 7 is provided with an inner filter layer 2 702 and an inner filter layer 1 701 in sequence. The inner frame 7 is covered with a support net 6, and the upper and lower ends of the support net 6 are welded and fixed to the opposite surfaces of the two central rings 5 ​​respectively. The outer frame 4 is provided outside the support net 6, and the outer wall of the outer frame 4 is provided with an outer filter layer 1 401 and an outer filter layer 2 402 in sequence. The upper central ring 5 is screwed to the upper pressure plate 1, and the lower central ring 5 is screwed to the lower pressure plate 2. The outer filter layer 2 402 is provided with a reinforcing frame 3.

[0028] The inner filter layer 701 and outer filter layer 401 are made of micron-sized metal fibers, while the inner filter layer 702 and outer filter layer 402 are made of micron-sized powder and metal mesh. They are used to provide higher dust interception. The inner filter layer 701, outer filter layer 401, inner filter layer 702 and outer filter layer 402 are used as the main filter media. Compared with conventional single filter media, the filtration effect is better and it can effectively filter dust, making it more effective at intercepting particulate matter in the air.

[0029] 5. Central ring, 1. Upper pressure plate, 2. Lower pressure plate, 7. Inner frame, 4. Outer frame, 3. Reinforcing frame: Selected metal materials, specifically nickel-based alloys, stainless steel and other materials suitable for the working conditions; 6. Support mesh: Selected metal mesh materials, specifically nickel-based alloys, stainless steel and other materials suitable for the working conditions. Support mesh 6 refers to woven mesh, or pressed or welded support materials can also be selected.

[0030] During filtration, air passes through inner filter layer 1 701, inner filter layer 2 702, inner frame 7, support mesh 6, outer frame 4, outer filter layer 1 401 and outer filter layer 2 402 in sequence before being discharged.

[0031] The upper and lower ends of the inner filter layer 701 and the inner filter layer 702 are welded and fixed to the opposite surfaces of the two central rings 5 ​​to maintain sufficient structural strength; the inner frame 7 is provided with through holes 703 distributed at equal intervals around its perimeter; the through holes 703 facilitate the passage of air and reduce the material consumption in the manufacture of the inner frame 7.

[0032] The upper and lower ends of the outer periphery of the inner frame 7 are fixed with connecting rods 704 arranged in a ring array. The end of the connecting rod 704 away from the inner frame 7 passes through the support net 6 and is welded to the inner wall of the outer frame 4.

[0033] The inner frame 7 and the outer frame 4 are connected by a connecting rod 704, so that the two are connected as one and maintain sufficient structural strength.

[0034] The upper ends of the outer frame 4, outer filter layer 1 401 and outer filter layer 2 402 are all welded and fixed to the bottom surface of the upper pressure plate 1, and the lower ends of the outer frame 4, outer filter layer 1 401 and outer filter layer 2 402 are all welded and fixed to the top surface of the lower pressure plate 2; so that the outer frame 4, outer filter layer 1 401, outer filter layer 2 402, upper pressure plate 1 and lower pressure plate 2 are connected into an integrated structure, making its structural strength higher.

[0035] The center ring 5 is hollow inside. The lower pressure plate 2 has an inlet 201 with the same inner diameter as the center ring 5. The top of the upper pressure plate 1 is closed. The thickness of both the upper pressure plate 1 and the lower pressure plate 2 is greater than the thickness of the center ring 5. The air to be filtered enters the inner cavity of the inner frame 7 from the inlet 201.

[0036] The outer frame 4 has equidistantly distributed through holes 403 on its sides. The inner diameters of the upper pressure plate 1 and the lower pressure plate 2 are larger than the inner diameter of the outer filter layer 402. The through holes 403 facilitate the passage of air and reduce the material consumption in the manufacture of the outer frame 4.

[0037] The reinforcing frame 3 includes four reinforcing rings 301 distributed vertically, and all reinforcing rings 301 are fixed with reinforcing sheets 302 arranged in a ring array. The reinforcing rings 301 are sleeved in the outer filter layer 402.

[0038] The reinforcing frame 3 is set on the outermost layer to enhance the structural strength of the entire filter element. The uppermost and lowermost reinforcing rings 301 can be welded and fixed to the corresponding upper pressure plate 1 and lower pressure plate 2. The reinforcing sheet 302 is used to reinforce the side of the filter element.

[0039] The specific working principle of this utility model is as follows: First, the inner frame 7 is fixed together between the two central rings 5, and the inner wall of the inner frame 7 is provided with the second inner filter layer 702 and the first inner filter layer 701 in sequence. The upper and lower ends of the first inner filter layer 701 and the second inner filter layer 702 are welded and fixed to the opposite surfaces of the two central rings 5 ​​to maintain sufficient structural strength. The inner frame 7 and the outer frame 4 are welded together by the connecting rod 704. A support net 6 is also provided between the two central rings 5 ​​to further enhance the structural stability and provide a certain filtration effect. Then, the upper pressure plate 1 is screwed onto the outer side of the upper central ring 5, and the lower pressure plate 2 is screwed onto the outer side of the lower central ring 5. The upper and lower ends of the outer frame 4, the first outer filter layer 401 and the second outer filter layer 402 are welded to the upper pressure plate 1 and the lower pressure plate 2 in turn. Finally, a reinforcing frame 3 is installed on the outer filter layer 402. The uppermost and lowermost reinforcing rings 301 of the reinforcing frame 3 can be welded and fixed to the corresponding upper pressure plate 1 and lower pressure plate 2. The side of the filter element is then reinforced with the reinforcing sheet 302.

[0040] During filtration, the air to be filtered enters the inner cavity of the inner frame 7 through the inlet 201. The air then passes through the inner filter layer 1 701, the inner filter layer 2 702, the through hole 2 703 in the inner frame 7, the support mesh 6, the through hole 1 403 in the outer frame 4, the outer filter layer 1 401 and the outer filter layer 2 402 in sequence before being discharged, thus achieving dust interception.

[0041] During backflushing, the air blows from the outermost side, rushing towards the outer filter layer 401 and outer filter layer 402, blowing off the dust adhering to their inner sides. However, the strong wind is partially blocked by the outer frame 4, protecting the outer filter layer 401 and outer filter layer 402 from excessive deformation. A through hole can be opened on the lower pressure plate 2, which is closed under normal conditions and opened during backflushing (not shown in the figure) to discharge the dust blown off the outer filter layer 401 and outer filter layer 402. Secondly, for the dust adhering to the inner filter layer 701 and inner filter layer 702 inside the inner frame 7, the backflushing pipe is inserted from the inlet and blown at an angle towards the inner wall of the inner filter layer 701 and inner filter layer 702 to achieve dust removal. The dust is discharged from the inlet 201, and the strong wind blowing towards the inner filter layer 701 and inner filter layer 702 is blocked by the inner frame 7 to prevent deformation and damage.

[0042] The above are merely preferred embodiments of the present utility model and do not limit the present utility model. Any modifications, equivalent substitutions, or improvements made to the technical solutions described in the foregoing embodiments, or to some of the technical features, shall fall within the protection scope of the present utility model.

Claims

1. A backflush filter element preventing backflush deformation, comprising an upper pressing plate (1), a lower pressing plate (2), a skeleton, an outer skeleton (4), two center rings (5) and an inner skeleton (7), characterized in that: Two central rings (5) are distributed vertically, and an inner frame (7) is fixed between the two central rings (5). An inner filter layer two (702) and an inner filter layer one (701) are sequentially arranged on the inner wall of the inner frame (7). A support net (6) is wrapped around the inner frame (7). The upper and lower ends of the support net (6) are welded and fixed to the opposite surfaces of the two central rings (5). An outer frame (4) is arranged outside the support net (6). An outer filter layer one (401) and an outer filter layer two (402) are sequentially arranged on the outer wall of the outer frame (4). An upper pressure plate (1) is screwed onto the upper central ring (5), and a lower pressure plate (2) is screwed onto the lower central ring (5). A reinforcing frame (3) is arranged outside the outer filter layer two (402).

2. The backflush filter element of claim 1, wherein: The upper and lower ends of the inner filter layer one (701) and the inner filter layer two (702) are welded and fixed to the opposite surfaces of the two central rings (5), respectively. The inner skeleton (7) is provided with through holes two (703) distributed at equal intervals around its perimeter.

3. The backflush filter element of claim 1, wherein: The upper and lower ends of the outer periphery of the inner frame (7) are fixed with connecting rods (704) arranged in a ring array. The end of the connecting rod (704) away from the inner frame (7) passes through the support net (6) and is welded to the inner wall of the outer frame (4).

4. The backflush filter element of claim 1, wherein: The upper ends of the outer frame (4), outer filter layer one (401) and outer filter layer two (402) are all welded and fixed to the bottom surface of the upper pressure plate (1), and the lower ends of the outer frame (4), outer filter layer one (401) and outer filter layer two (402) are all welded and fixed to the top surface of the lower pressure plate (2).

5. The anti-backwash filter element of claim 1, wherein: The center ring (5) is hollow inside. The lower pressure plate (2) has an inlet (201) with the same inner diameter as the center ring (5). The top of the upper pressure plate (1) is closed. The thickness of the upper pressure plate (1) and the lower pressure plate (2) is greater than the thickness of the center ring (5).

6. The anti-backwash filter element of claim 1, wherein: The outer frame (4) has through holes (403) distributed at equal intervals on its periphery, and the inner diameters of the upper pressure plate (1) and the lower pressure plate (2) are larger than the inner diameter of the outer filter layer (402).

7. The anti-backwash filter element of claim 1, wherein: The reinforcing frame (3) includes four reinforcing rings (301) distributed vertically. All reinforcing rings (301) are fixed with reinforcing sheets (302) arranged in a ring array. The reinforcing rings (301) are sleeved inside the outer filter layer (402).

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