Variable-pleat-interval special-shaped filter cartridge and dust remover thereof

Abstract

The filter cartridge comprises a filter cartridge body, a special-shaped cover is arranged at the upper end of the filter cartridge body, a special-shaped bottom cover is arranged at the lower end of the filter cartridge body, the filter cartridge body is formed by folding a variable-pleat-interval filter material in a pear shape or other shapes, the variable-pleat-interval folded filter material special-shaped filter cartridge is formed, and a special-shaped sealing ring is arranged on the outer surface of the special-shaped cover. According to the variable-pleat-interval special-shaped filter cartridge and the dust remover comprising the filter cartridge, a geometric constraint structure of the special-shaped cover and the matched special-shaped sealing ring is adopted, a filter material is designed in a segmented manner, a windward section adopts a wide-pleat-interval design, and the special-shaped cover, the protruding part of the sealing ring and a pattern plate positioning mark form a mounting guide, so that the filtering performance and the dust removal effect of the filter cartridge are effectively improved; the sealing performance is enhanced, installation is convenient, fluid distribution is optimized, and the overall performance and the dust removal effect of the dust remover are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of environmental protection dust removal equipment technology, specifically to a variable-pleated irregular-shaped filter cartridge and its dust collector. Background Technology

[0002] A filter cartridge is a cylindrical element used for filtration. Filter cartridges are generally divided into those for filtering gaseous media and those for filtering liquid media. Filter cartridges are surface filtration elements that use the tiny permeable structures formed on the surface of the filter material to block particulate matter in the air. Air containing particulate matter is drawn in by a fan, and the particulate matter is blocked on the surface of the filter bag, while clean air is discharged.

[0003] Traditional filter cartridges typically employ an equidistant pleat spacing design. When handling large volumes of dust-laden gas, the pleat spacing on the windward side is too small, resulting in a narrow airflow channel and a significant increase in airflow resistance. The filtration load is concentrated in the windward section. Furthermore, the narrow channel easily leads to incomplete dust removal, causing dust to accumulate, bridge, or even cake between the pleats, resulting in blockage on the windward side. This uneven dust accumulation not only reduces the effective filtration area and shortens the filter cartridge's lifespan but also weakens the overall dust collection performance. Simultaneously, traditional filter cartridges rely on an interference fit between the sealing ring and the circular perforated plate for sealing, using only friction generated by compression deformation for fixation. During operation, airflow pulsations and equipment vibrations can easily cause the filter cartridge to rotate circumferentially, gradually loosening the sealing ring and causing dust leakage along the gaps in the perforated plate. This not only affects the emission concentration but also exacerbates the erosion and wear of surrounding filter cartridges. Therefore, we designed a filter cartridge with a large pleat spacing and an irregular cross-section on the windward side, featuring an irregularly shaped cover sealing structure, combined with a beveled section blowpipe design. This aims to improve the dust removal effect of the filter cartridge and the overall filtration performance of the dust collector. Summary of the Invention

[0004] The technical problem to be solved by this invention is to overcome the existing defects and provide a variable-pleat spacing irregularly shaped filter cartridge and its dust collector. It adopts a geometric constraint structure of irregularly shaped cover and matching irregularly shaped sealing ring, and the filter media is designed in segments. The air-facing section adopts a wide pleat design. The irregularly shaped cover, the groove protrusion of the irregularly shaped sealing ring and the positioning mark of the tube sheet form an installation guide, thereby effectively improving the filtration performance and dust removal effect of the filter cartridge, enhancing the sealing performance, facilitating installation, and optimizing fluid distribution. At the same time, combined with the asymmetric flow guiding jet design of the inclined section jet nozzle, it significantly improves the overall performance and dust removal effect of the dust collector, and can effectively solve the problems in the background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a variable pleat spacing irregularly shaped filter cartridge, comprising:

[0006] Filter cartridge: It has an irregularly shaped cover at the top. The filter cartridge is made of pear-shaped or other shapes of variable-pleated filter media, forming an irregularly shaped filter cartridge with variable-pleated folded filter media. An irregularly shaped sealing ring is set on the outer surface of the irregularly shaped cover. An irregularly shaped sealing ring groove is opened in the middle of the outer surface of the irregularly shaped sealing ring. The filter cartridge is inserted and installed into the tube sheet hole of the dust collector. The tube sheet hole is an irregularly shaped hole. The geometric constraint structure of the irregularly shaped cover and the matching irregularly shaped sealing ring is adopted. The filter media is designed in sections. The air-facing section adopts a wide folding design. The irregularly shaped cover, the protruding part of the sealing ring and the positioning mark of the tube sheet form an installation guide, thereby effectively improving the filtration performance and dust removal effect of the filter cartridge, enhancing the sealing performance, facilitating installation, optimizing fluid distribution, and significantly improving the overall performance and dust removal effect of the dust collector.

[0007] Furthermore, the pleated filter media of the variable pleat spacing folded filter media irregular filter cartridge adopts a non-equal spacing distribution form, dividing the filter media filtration section into an air-facing section and a non-air-facing section. The air-facing section is the part of the filter media facing the air inlet of the dust collector, and the non-air-facing section is the part of the filter media facing the air outlet of the dust collector. The pleat spacing of the air-facing section is Z1, and the pleat spacing of the non-air-facing section is Z2, Z1>Z2, which facilitates the unblocking and cleaning of dust.

[0008] Furthermore, in the variable pleat spacing irregular-shaped filter cartridge, the outline length of the pleated filter media in the windward section accounts for more than 20% of the overall circumference of the filter media. The increased pleat spacing in the windward section of the variable pleat spacing irregular-shaped filter cartridge makes the airflow channel wider and the dust-laden air flow smoother. This reduces the pressure on the windward section to filter and purify a large amount of dust-laden gas due to the small pleat spacing, while ensuring the dust removal effect of the filter cartridge. The non-windward section uses a smaller pleat spacing, increasing the number of pleats in the pleated filter media at the same pleat depth, further ensuring the effective filtration area of ​​the filter cartridge and improving the dust removal performance of the filter cartridge. The variable pleat spacing pleated filter media irregular-shaped filter cartridge has a better dust removal and cleaning effect during the dust removal process. The pleated filter media is not easily clogged by dust during the filtration process, and the filtration effect is good. The pulse energy required during pulse cleaning is lower, which can effectively improve the filtration performance and dust removal effect of the filter cartridge.

[0009] Furthermore, the cross-sectional profile of the filter cartridge is pear-shaped, circular, or other shapes.

[0010] Furthermore, the variable pleat spacing filter cartridge non-uniform pleat spacing arrangement includes two fixed pleat spacings: the pleat spacing of the windward section and the pleat spacing of the non-windward section, wherein the pleat spacing of the windward section is more than 1.1 times that of the pleat spacing of the non-windward section, or a gradually changing pleat spacing arrangement, which gradually decreases from the center of the windward section to both sides, and the pleat spacing is the smallest at the center of the non-windward section.

[0011] Furthermore, the inner perimeter of the irregular cross-section of the variable pleated spacing irregular filter cartridge filter medium is, but is not limited to, a regular circle, rectangle or other shapes. The outer perimeter of the irregular cross-section is symmetrical, and the irregular shape has one and only one axis of symmetry. At the same time, the axis of symmetry also serves as the respective axis of symmetry for the windward section and the non-windward section of the filter cartridge cross-section. The shape of the variable pleated spacing folded filter media irregular filter cartridge is not limited to pear shape or circle. Any irregular filter cartridge with variable pleated spacing cross-section pleated filter media is within the protection range, which optimizes the fluid distribution of the filter cartridge.

[0012] Furthermore, the variable-pitch irregular-shaped filter cartridge uses a matching irregular-shaped sealing ring, which is fitted with the tube sheet of the dust collector to seal the irregular-shaped sealing ring groove. The irregular-shaped outer cross-section of the groove is composed of straight segments and discontinuous arc segments, or only discontinuous arc segments. If there are straight segments, the straight segment L1 is located in the windward section. The maximum length of the line segment connecting any two points on the perimeter of the irregular-shaped outer cross-section of the irregular-shaped sealing ring, which is parallel to the axis of symmetry, is defined as H, and the line containing the maximum length H coincides with the axis of symmetry of the irregular cross-section. The maximum width of the line segment connecting two points on the irregular-shaped outer cross-section of the irregular-shaped sealing ring groove, which is perpendicular to H, is defined as W, and the maximum length H is perpendicular to H. The maximum width W and the straight line segment L1 are bisected. The maximum width W divides the maximum length H into two line segments without bisecting them. At the same time, the ratio of H / W is greater than 1. In the irregular outer cross section, the maximum width W divides the maximum length H into two non-equal line segments. The longer line segment H1 is at least 1.1 times larger than the shorter line segment H2, and the length of the shorter line segment is greater than zero. The maximum width divides the irregular cross section into a windward section and a non-windward section. The windward section and H2 are located on the same side of the maximum width W. On the perimeter of the irregular outer cross section, the non-windward section and H1 are located on the other side of the maximum width W, which facilitates the assembly between the irregular sealing ring and the irregular perforated plate hole.

[0013] Furthermore, the filter cartridge is installed in the irregularly shaped perforated hole in the center of the tube sheet of the dust collector. The sealing ring groove is fitted with the inner wall of the irregularly shaped perforated hole. The variable-pitch irregularly shaped filter cartridge uses a matching irregularly shaped sealing ring. The structure of the part where the irregularly shaped cover and the irregularly shaped sealing ring fit together is similar to the shape of the irregularly shaped sealing ring. Its cross-sectional outer contour is obtained by reducing the irregularly shaped cross section of the irregularly shaped sealing ring inward at equal intervals. The outer contour is obtained by enlarging the cross section of the irregularly shaped perforated hole at equal intervals. The cross-sectional outer contour of the irregularly shaped cover is composed of straight segments and discontinuous arc segments, or only discontinuous arc segments. If there are straight segments, the straight segments are located in the windward section. The irregularly shaped sealing ring has an irregularly shaped sealing ring groove that is adapted to the thickness of the tube sheet of the dust collector. The irregularly shaped shape of the cover meets the relevant characteristics of the irregularly shaped sealing ring, which facilitates the assembly between the irregularly shaped sealing ring and the irregularly shaped cover.

[0014] Furthermore, the variable-pitch irregular-shaped filter cartridge adopts an irregularly shaped perforated plate with an adapted shape. The irregularly shaped perforated plate and the irregularly shaped sealing ring groove are fitted with the structural dimensions. The opening contour of the irregularly shaped perforated plate is similar to the outer contour of the irregularly shaped cover and the irregularly shaped sealing ring. It is obtained by scaling the irregularly shaped outer cross section of the irregularly shaped sealing ring groove outward at equal intervals. The cross section of the irregularly shaped perforated plate consists of straight segments and discontinuous arc segments, or only discontinuous arc segments. If there are straight segments, the straight segments are located in the windward section. The irregular shape characteristics of the irregularly shaped perforated plate satisfy the relevant description of the shape of the irregularly shaped sealing ring, which facilitates the assembly between the irregularly shaped perforated plate and the irregularly shaped sealing ring.

[0015] Furthermore, the irregularly shaped cover, irregularly shaped sealing ring, and irregularly shaped perforated plate have irregularly shaped protruding parts, which serve as positioning and guiding mechanisms for the assembly of the irregularly shaped filter material and the irregularly shaped cover with glue, the assembly of the irregularly shaped sealing ring and the irregularly shaped perforated plate, and the installation of the filter cartridge with the irregularly shaped sealing ring and the irregularly shaped perforated plate. The vertices of the positioning and guiding mechanisms for the irregularly shaped cover, irregularly shaped sealing ring, and the perforated plate are A1, A2, and A3, respectively, and the positioning points A1, A2, and A3 are all located on the axis of symmetry of the irregularly shaped cross section of the folded filter material. During assembly, it is opposite to the air inlet of the dust collector. The irregularly shaped filter cartridge with variable pleat spacing cooperates with the irregularly shaped cover, irregularly shaped sealing ring, and irregularly shaped perforated plate. Its irregularly shaped geometric constraint structure can limit the slippage, detachment, and loosening of each component of the filter cartridge, ensure the sealing effect, and facilitate the assembly of the filter cartridge.

[0016] Furthermore, the ratio of pleat spacing to pleat depth in the windward section of the pleated filter media of the variable pleat spacing irregular shape filter cartridge is greater than 0.5, and the ratio of pleat spacing to pleat depth in the non-windward section is between 0.2 and 0.5. Under standard working conditions and difficult-to-clean working conditions, the maximum diameter H (in mm) of the variable pleat spacing irregular shape filter cartridge satisfies the following relationship with the number of pleats n: standard type n≤0.05H+36.5, easy-to-clean type n≤0.15H+16.5, which facilitates the cleaning of the filter cartridge.

[0017] The present invention also provides a dust collector comprising a variable-pitch irregular-shaped filter cartridge, including a dust collector body, wherein the dust collector body is provided with a variable-pitch irregular-shaped filter cartridge inside, and an air inlet and an air outlet are provided at the upper front end of the dust collector body. The air inlet is opposite to the windward section of the variable-pitch irregular-shaped filter cartridge, and the air outlet is opposite to the non-windward section of the variable-pitch irregular-shaped filter cartridge. The blowpipe of the irregular-shaped filter cartridge dust collector adopts a slanted section blow nozzle design, and asymmetrical flow guiding directional blow, which concentrates the blow energy to improve the dust removal efficiency of the windward side and enhance the dust removal effect.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: A variable pleat spacing irregularly shaped filter cartridge and its dust collector have the following advantages:

[0019] The filter cartridge adopts a geometric constraint structure of irregularly shaped cover and matching irregularly shaped sealing ring. The filter media is designed in sections, and the air-facing section adopts a wide folding design. The irregularly shaped cover, the protruding part of the sealing ring and the positioning mark of the tube sheet form an installation guide, thereby effectively improving the filtration performance and dust removal effect of the filter cartridge, enhancing the sealing performance, facilitating installation, optimizing fluid distribution, and significantly improving the overall performance and dust removal effect of the dust collector. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the irregular-shaped sealing ring of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of embodiment 2 of the irregular-shaped sealing ring of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of embodiment 3 of the irregular-shaped sealing ring of the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of embodiment 4 of the irregular-shaped sealing ring of the present invention;

[0024] Figure 5 This is a schematic diagram of the irregularly shaped cap of the present invention;

[0025] Among them, Figure (1) is an irregularly shaped cover with an irregular inner profile and an irregular outer profile in Example 1, and Figure (2) is an irregularly shaped cover with a circular inner profile and an irregular outer profile in Example 2.

[0026] Figure 6 This is a schematic diagram of the structure of the pear-shaped non-uniform pleat spacing filter material of Example 1 of the present invention;

[0027] Figure 7 This is a schematic diagram comparing the structure of an embodiment and a comparative example of the non-uniform pleat spacing filter material of the present invention;

[0028] Among them, Figure (1) is the pear-shaped non-uniform pleat spacing filter media of Example 1, Figure (2) is the circular non-uniform pleat spacing filter media of Example 2, and Figure (3) is the conventional cylindrical equal pleat spacing filter media of the comparative example.

[0029] Figure 8 This is a schematic diagram of the assembly structure of the irregularly shaped cap and the irregularly shaped sealing ring of the present invention;

[0030] Figure 9 This is a schematic diagram of the assembly structure of the filter cartridge and the irregular sealing ring of the present invention;

[0031] Figure 10 This is a schematic diagram of the assembly structure of the filter cartridge and the perforated plate of the present invention;

[0032] Figure 11 This is a schematic diagram showing the application of the present invention in a dust collector.

[0033] In the diagram: 1. Filter cartridge, 2. Irregularly shaped cover, 3. Irregularly shaped bottom cover, 4. Variable pleat spacing filter media, 5. Irregularly shaped sealing ring, 6. Irregularly shaped sealing ring groove, 7. Tube plate, 8. Irregularly shaped tube plate hole, 9. Dust collector body, 10. Air inlet, 11. Air outlet, 12. Pulse jet pipe. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Please see Figure 1-11 The present invention provides the following technical solutions:

[0036] Example 1:

[0037] like Figure 1-5 As shown in Figures 8-10, a variable-pitch shaped filter cartridge includes a filter cartridge 1, an irregularly shaped cover 2 at the upper end of the filter cartridge 1, and an irregularly shaped bottom cover 3 at the lower end of the filter cartridge 1. The filter cartridge 1 is formed by folding variable-pitch filter material 4 in a pear shape to form a variable-pitch folded filter material irregularly shaped filter cartridge. An irregularly shaped sealing ring 5 is provided on the outer surface of the irregularly shaped cover 2, and an irregularly shaped sealing ring groove 6 is opened in the middle of the outer surface of the irregularly shaped sealing ring 5. The upper and lower ends of the filter cartridge 1 are installed in the irregularly shaped tube sheet hole 8 opened in the middle of the tube sheet 7 of the dust collector. The irregularly shaped sealing ring groove 6 is installed in conjunction with the inner wall of the irregularly shaped tube sheet hole 8. The geometric constraint structure of the irregularly shaped cover and the matching irregularly shaped sealing ring 5 is adopted. The filter material is designed in sections, and the windward section adopts a wide folding design. The protrusion of the irregularly shaped cover and the positioning mark of the tube sheet 7 form an installation guide, thereby effectively improving the filtration performance and dust removal effect of the filter cartridge 1, enhancing the sealing performance, facilitating installation, optimizing fluid distribution, and significantly improving the overall performance and dust removal effect of the dust collector body 9.

[0038] The cross-sectional shape of the filter cartridge 1 includes, but is not limited to, pear-shaped, circular, or other shapes. The variable pleat spacing filter cartridge uses a non-uniform pleat spacing arrangement, including two fixed pleat spacings: the pleat spacing in the windward section and the pleat spacing in the non-windward section. The pleat spacing in the windward section is more than 1.1 times that in the non-windward section. Alternatively, it can use a gradually decreasing pleat spacing arrangement, with the spacing gradually decreasing from the center of the windward section to both sides, reaching its minimum at the center of the non-windward section. The pleated filter media of the variable pleat spacing folded filter cartridge adopts a non-uniform spacing distribution, dividing the filter media filtration section into a windward section and a non-windward section. The windward section is the part of the filter media facing the air inlet 10 of the dust collector body 9, and the non-windward section is the part of the filter media facing the air outlet 11 of the dust collector body 9. The pleat spacing in the windward section is Z1, and the pleat spacing in the non-windward section is Z2, where Z1 > Z2, facilitating dust removal and... For dust removal, the pleated filter media of the variable pleat spacing irregular-shaped filter cartridge has a profile length that accounts for more than 20% of the overall circumference of the filter media in the windward section. The increased pleat spacing in the windward section of the variable pleat spacing irregular-shaped filter cartridge makes the airflow channel wider and the dust-laden air flow more smoothly. This reduces the pressure on the windward section to filter and purify a large amount of dust-laden gas due to the small pleat spacing, while ensuring the dust removal effect of filter cartridge 1. The non-windward section uses a smaller pleat spacing, which increases the number of pleats in the pleated filter media at the same pleat depth, further ensuring the effective filtration area of ​​filter cartridge 1 and improving the dust removal performance of filter cartridge 1. The variable pleat spacing pleated filter media irregular-shaped filter cartridge has a better dust removal and dust removal effect during the dust removal process. The pleated filter media is not easily clogged by dust during the filtration process, and the filtration effect is good. The pulse energy required during pulse cleaning is lower, which can effectively improve the filtration performance and dust removal effect of filter cartridge 1.

[0039] The inner perimeter of the irregular cross-section of the variable-pitch irregular filter cartridge filter medium is a regular circle or other shape, and the outer perimeter of the irregular cross-section is a symmetrical irregular shape. Moreover, the irregular shape has one and only one axis of symmetry. At the same time, the axis of symmetry also serves as the respective axis of symmetry for the windward section and the non-windward section of the filter cartridge cross-section. The shape of the variable-pitch pleated filter media irregular filter cartridge is not limited to pear shape. Any irregular filter cartridge with variable-pitch cross-section pleated filter media is within the protection range, which optimizes the fluid distribution of the filter cartridge 1. The variable-pitch irregular filter cartridge adopts a matching irregular sealing ring 5 and an irregular sealing ring groove 6 that is sealed with the tube sheet 7 of the dust collector. The irregular outer cross-section of the groove is composed of straight segments and discontinuous arc segments, or only discontinuous arc segments. If there are straight segments, the straight segment L1 is located in the windward section.

[0040] Define the maximum length H of the line segment connecting any two points parallel to the axis of symmetry on the perimeter of the irregular outer cross-section of the irregular sealing ring 5, and the line containing the maximum length H coincides with the axis of symmetry of the irregular cross-section. Define the maximum width W of the line segment connecting two points on the irregular outer cross-section of the irregular sealing ring groove 6 perpendicular to H, the maximum length H perpendicularly and bisecting the maximum width W and the line segment L1. The maximum width W divides the maximum length H into two line segments without bisecting them, and the ratio of H / W is greater than 1. The maximum width W in the irregular outer cross-section divides the maximum length H into two non-equal line segments, where the longer line segment H1 is at least 1.1 times larger than the shorter line segment H2, and the length of the shorter line segment is greater than zero. The maximum width divides the irregular cross-section into a windward section and a non-windward section. The windward section and H2 are located on the same side of the maximum width W. The non-windward section on the perimeter of the irregular outer cross-section is located on the same side as H1. On the other side of the width W, it is convenient to assemble the irregular cover with the filter cartridge 1. The irregular filter cartridge with variable pleat spacing adopts a matching irregular sealing ring 5. The structure of the part where the irregular cover and the irregular sealing ring 5 mate is similar to the shape of the irregular sealing ring 5. Its inner contour of the cross section is obtained by equal reduction of the irregular cross section of the irregular sealing ring 5 inward, with a distance of 0.3-0.8mm. The outer contour is obtained by equal enlargement of the cross section of the irregular tube sheet hole 8, with a distance of 0.3-0.8mm. The outer contour of the cross section of the irregular cover is composed of straight segments and discontinuous arc segments, or only discontinuous arc segments. If there are straight segments, the straight segment L1 is located in the windward section. The irregular sealing ring 5 has an irregular sealing ring groove 6 that is adapted to the thickness of the tube sheet 7 of the dust collector. The irregular shape characteristics of the irregular sealing ring 5 meet the relevant characteristics of the irregular cover shape, which is convenient for the assembly between the irregular sealing ring 5 and the irregular cover.

[0041] To facilitate assembly, the irregular sealing ring 5 has a groove for assembly with the irregular flower plate hole 8. The groove shape includes, but is not limited to, a U-shaped groove, or other shapes. The U-shaped groove has a conical structure to facilitate assembly and sealing. The irregular cover 2 can be provided with a notch, which facilitates disassembly and can also serve as a positioning point. At the same time, the irregular cover 2 can be provided with a transverse annular reinforcing rib to enhance the overall structural strength.

[0042] The variable-pitch irregular-shaped filter cartridge uses an irregularly shaped perforated plate 8 with a matching shape. The irregularly shaped perforated plate 8 and the irregularly shaped sealing ring groove 6 are fitted into the structural dimensions. The outline of the irregularly shaped perforated plate 8 is similar to the outline of the irregularly shaped cover 2 and the irregularly shaped sealing ring 5, and is obtained by equidistant scaling of the irregularly shaped outer cross-sectional outline of the irregularly shaped sealing ring groove 6. The cross-section of the irregularly shaped perforated plate 8 consists of straight segments and discontinuous arc segments, or only discontinuous arc segments. If straight segments exist, the straight segment L1 is located in the windward section, and the irregular shape characteristics of the irregularly shaped perforated plate 8 meet the relevant characteristics of the irregularly shaped sealing ring 5, facilitating the assembly between the irregularly shaped perforated plate 8 and the irregularly shaped sealing ring 5. Figure 10As shown, the irregularly shaped cover 2, irregularly shaped sealing ring 5, and irregularly shaped perforated plate 8 are provided with irregularly shaped protruding parts, which serve as positioning and guiding mechanisms for the irregularly shaped filter media and irregularly shaped cover to be glued together, the irregularly shaped sealing ring 5 and irregularly shaped perforated plate 8 to be assembled, and the filter cartridge 1 to be installed on the machine with the irregularly shaped sealing ring 5 and irregularly shaped perforated plate 8. The vertices of the positioning and guiding mechanisms of the protruding parts of the irregularly shaped cover 2, irregularly shaped sealing ring 5, and perforated plate 7 are A1, A2, and A3, respectively. The positioning points A1, A2, and A3 are all located on the axis of symmetry of the irregularly shaped cross section of the folded filter media.

[0043] During assembly, the filter cartridge is positioned opposite to the air inlet 10 of the dust collector body 9. The variable pleat spacing irregular shape filter cartridge, irregular shape cover, irregular shape sealing ring 5, and irregular shape tube sheet hole 8 cooperate with each other. Its irregular geometric constraint structure can limit the slippage, detachment, and loosening of each component of the filter cartridge 1, ensuring the sealing effect and facilitating the assembly of the filter cartridge 1. The ratio of pleat spacing to pleat depth in the pleated filter media of the variable pleat spacing irregular shape filter cartridge is greater than 0.5 in the windward section, and the ratio of pleat spacing to pleat depth in the non-windward section is between 0.2 and 0.5. Under standard working conditions and difficult cleaning conditions, the maximum diameter H (in mm) of the variable pleat spacing irregular shape filter cartridge satisfies the following relationship with the number of pleats n: standard type n≤0.05H+36.5, easy cleaning type n≤0.15H+16.5, which facilitates the cleaning of the filter cartridge 1.

[0044] like Figure 11 As shown, a dust collector including a variable-pitch irregularly shaped filter cartridge includes a dust collector body 9, with a filter cartridge 1 inside the dust collector body 9. An air inlet 10 is located at the upper front end of the dust collector body 9, and an air outlet 11 is located at the lower rear end of the dust collector body 9. When handling large-volume dust-laden gas, the dust collector body 9 can effectively reduce airflow resistance, reduce dust blockage on the windward side of the filter cartridge 1, and improve overall dust removal performance. The variable-pitch irregularly shaped filter cartridge, irregularly shaped cover, irregularly shaped sealing ring 5, and irregularly shaped flower-shaped filter cartridge in the dust collector body 9 are integrated with these components. The mating structure of the plate holes 8 can effectively prevent the filter cartridge 1 from rotating circumferentially due to airflow pulsation and equipment vibration during operation, thus avoiding dust leakage. During the pulse cleaning process, the dust collector body 9 can achieve better cleaning effect with lower pulse energy, extend the service life of the filter cartridge 1, and facilitate the dust removal work of the dust collector body 9. The blowpipe 12 of the irregularly shaped filter cartridge dust collector adopts a slanted section blowpipe design and asymmetrical flow guiding directional blowing. The concentrated blowing energy improves the cleaning efficiency of the windward side and enhances the cleaning effect.

[0045] Specifically, the filter cartridge 1 is designed with a pear-shaped cross section, and the pleat spacing of the windward section is designed to be 1.1 times or more than that of the non-windward section, or a gradient pleat spacing arrangement is used to distribute the filter media pleat spacing design.

[0046] Example 2:

[0047] like Figure 1 , Figure 5As shown, the outer contour of the irregular cross section of the irregular sealing ring 5 is circular, and the inner contour is irregular; the outer contour of the bottom cross section of the irregular cover 2 that matches it is also irregular, and the inner contour is circular; the outer contour of the circumference of the variable pleat spacing filter material 4 is also circular.

[0048] Example 3:

[0049] like Figure 1 , Figure 5 As shown, the outer contour of the irregular cross section of the irregular sealing ring 5 is circular, and the inner contour is irregular; the outer contour of the bottom cross section of the irregular cover 2 that matches it is also irregular, and the inner contour is irregular; the outer contour of the perimeter of the variable pleat spacing filter material 4 is also irregular.

[0050] Example 4:

[0051] like Figure 2 As shown, the outer contour of the irregular cross section of the irregular sealing ring 5 is irregular, and the inner contour is circular; the outer contour of the bottom cross section of the irregular cover 2 that matches it is also circular, and the inner contour is also circular; the outer contour of the circumference of the variable pleat spacing filter material 4 is also circular.

[0052] Example 5:

[0053] like Figure 2 As shown, the outer contour of the irregular cross section of the irregular sealing ring 5 is irregular, and the inner contour is circular; the outer contour of the bottom cross section of the irregular cover 2 that matches it is also circular, and the inner contour is irregular; the outer contour of the circumference of the variable pleat spacing filter material 4 is also irregular.

[0054] Example 6:

[0055] like Figure 3 , Figure 5 As shown, the outer contour of the irregular cross section of the irregular sealing ring 5 is irregular, and the inner contour is irregular; the outer contour of the bottom cross section of the irregular cover 2 that matches it is also irregular, and the inner contour is circular; the outer contour of the circumference of the variable pleat spacing filter material 4 is also circular.

[0056] Example 7:

[0057] like Figure 3 , Figure 5 As shown, the outer contour of the irregular cross section of the irregular sealing ring 5 is irregular, and the inner contour is irregular; the outer contour of the bottom cross section of the irregular cover 2 that matches it is also irregular, and the inner contour is irregular; the outer contour of the perimeter of the variable pleat spacing filter material 4 is also irregular.

[0058] Example 8:

[0059] like Figure 4 As shown, the outer contour of the irregular cross section of the irregular sealing ring 5 is circular, and the inner contour is circular; the outer contour of the bottom cross section of the irregular cover 2 that matches it is also circular, and the inner contour is also circular; the outer contour of the circumference of the variable pleat spacing filter material 4 is also circular.

[0060] Example 9:

[0061] like Figure 4 As shown, the outer contour of the irregular cross section of the irregular sealing ring 5 is circular, and the inner contour is circular; the outer contour of the bottom cross section of the irregular cover 2 that matches it is also circular, and the inner contour is irregular; the outer contour of the perimeter of the variable pleat spacing filter material 4 is also irregular.

[0062] The working principle of the variable pleat spacing irregular-shaped filter cartridge provided by this invention is as follows: The filter cartridge 1 is designed as a dust collector filter cartridge with an irregular-shaped cover sealing structure and a variable pleat spacing filter media distribution. It achieves a sealing fit between the filter cartridge 1 and the tube sheet 7 on the dust collector body 9 through a matching irregular-shaped cover and irregular-shaped sealing ring 5. The irregular-shaped cover and irregular-shaped sealing ring 5 are assembled and fitted through a matching irregular-shaped sealing ring groove 6, and a contact seal is formed with the tube sheet 7 by compression. During the assembly process of the filter cartridge 1, the processed pleated filter media is fixed to a pre-made inner support frame to ensure a tight fit between the filter media and the frame, while ensuring the overall structural strength and stability of the filter cartridge 1. Subsequently, other connecting components are installed to ensure that the filter cartridge 1 can be well sealed after being installed inside the dust collector body 9, preventing leakage of dust-laden gas. In the windward section of the large pleat spacing filter cartridge, the filter media ring is fitted inside the inner mesh and fixed to the irregular-shaped covers at both ends of the filter cartridge 1 with glue to complete the assembly. The non-uniform pleat spacing is controlled by adjusting the tightness between the filter media pleats to ensure the appropriate pleat spacing. To meet design requirements, the pleat spacing in the windward section is larger, providing a wider airflow channel, while the pleat spacing in the non-windward section remains unchanged or decreases. This ensures a greater number of pleats, increasing the effective filtration area. When the filter cartridge 1 is installed in the dust collector body 9, its adjustable non-uniform pleat spacing design makes the fluid distribution of dust-laden gas inside the filter cartridge 1 more uniform and the flow smoother. The larger pleat spacing in the windward section reduces filtration pressure, reduces the risk of dust blockage, and ensures dust removal efficiency. The smaller pleat spacing in the non-windward section increases the effective filtration area of ​​the filter cartridge at the same pleat depth, thereby improving dust removal performance. In addition, the filter cartridge 1 with a large pleat spacing in the windward section is sealed by its irregularly shaped cover and its irregularly shaped perforated plate hole 8 with a similar cross-sectional shape and an irregularly shaped sealing ring 5. The pleat spacing in the windward section of the filter cartridge 1 is designed to be more than 1.2 times that of a traditional circular filter cartridge, while the pleat spacing in other positions is designed to be less than 1 times that of a traditional circular filter cartridge. The number of pleats, i.e., the effective filtration area, of the irregularly shaped filter cartridge 1 remains unchanged or increases compared to a traditional circular filter cartridge.

[0063] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A variable-pleat spacing irregular-shaped filter cartridge, characterized in that, include: The filter cartridge (1) is used to purify the air by efficiently filtering and capturing dust, particulate matter and suspended matter in the gas. The filter cartridge (1) is provided with a shaped cover (2) at the upper end. The filter cartridge (1) is formed by folding the variable pleat spacing filter material (4) to form a variable pleat spacing folded filter material shaped filter cartridge. A shaped sealing ring (5) is provided on the outer surface of the shaped cover (2). A shaped sealing ring groove (6) is provided in the middle of the outer surface of the shaped sealing ring (5).

2. The variable pleat spacing irregularly shaped filter cartridge according to claim 1, characterized in that: The pleated filter media of the variable pleat spacing folded filter media irregular filter cartridge adopts a non-equal spacing distribution form, dividing the filter media filtration section into the windward section and the non-windward section. The windward section is the part of the filter media facing the air inlet (10) of the dust collector (9), and the non-windward section is the part of the filter media facing the air outlet (11) of the dust collector (9). The pleat spacing of the windward section is defined as Z1, and the pleat spacing of the non-windward section is defined as Z2, Z1>Z2.

3. The variable pleat spacing irregularly shaped filter cartridge according to claim 2, characterized in that: The pleated filter media of the variable-pleat-spacing irregular-shaped filter cartridge has a profile length of more than 20% of the overall circumference of the filter media in the windward section.

4. The variable pleat spacing irregularly shaped filter cartridge according to claim 2, characterized in that: The non-uniform pleat spacing arrangement of the variable pleat spacing filter cartridge includes two fixed pleat spacings: the pleat spacing of the windward section and the pleat spacing of the non-windward section. The pleat spacing of the windward section is more than 1.1 times that of the pleat spacing of the non-windward section, or a gradually changing pleat spacing arrangement, which gradually decreases from the center of the windward section to both sides.

5. The variable pleat spacing irregularly shaped filter cartridge according to claim 1, characterized in that: The cross-sectional profile of the filter cartridge (1) includes, but is not limited to, a pear shape.

6. The variable pleat spacing irregularly shaped filter cartridge according to claim 1, characterized in that: The inner perimeter of the irregular cross-section of the filter medium of the variable pleated spacing irregular filter cartridge is including but not limited to a regular circle, rectangle or rounded rectangle, and the outer perimeter of the irregular cross-section is a symmetrical irregular shape. The irregular shape has one and only one axis of symmetry, and the axis of symmetry also serves as the respective axis of symmetry of the windward section and the non-windward section of the filter cartridge cross-section.

7. The variable pleat spacing irregularly shaped filter cartridge according to claim 1, characterized in that: The variable-pitch irregular-shaped filter cartridge uses a matching irregular-shaped sealing ring (5) to seal the irregular-shaped sealing ring groove (6) that is in conjunction with the tube sheet (7) of the dust collector. The irregular-shaped outer cross section of the groove is composed of straight segments and discontinuous arc segments, or only discontinuous arc segments. If there are straight segments, the straight segment L1 is located in the windward section. The maximum length of the line segment connecting any two points on the perimeter of the irregular-shaped outer cross section of the irregular-shaped sealing ring (5) that is parallel to the axis of symmetry is defined as H, and the line containing the maximum length H coincides with the axis of symmetry of the irregular cross section. The line segment connecting two points on the irregular-shaped outer cross section of the irregular-shaped sealing ring groove (6) that is perpendicular to H is defined as H. The maximum width of the segment is W, and the maximum length H is perpendicular to and bisects the maximum width W and the straight line segment L1. The maximum width W divides the maximum length H into two line segments without bisecting them, and the ratio of H / W is greater than 1. In the irregular outer cross section, the maximum width W divides the maximum length H into two non-equal line segments, where the longer line segment H1 is at least 1.1 times larger than the shorter line segment H2, and the length of the shorter line segment is greater than zero. The maximum width divides the irregular cross section into a windward segment and a non-windward segment. The windward segment and H2 are located on the same side of the maximum width W, and the non-windward segment and H1 are located on the other side of the maximum width W on the perimeter of the irregular outer cross section.

8. The variable pleat spacing irregularly shaped filter cartridge according to claim 1, characterized in that: The upper and lower ends of the filter cartridge (1) are installed in the irregularly shaped tube sheet hole (8) in the middle of the tube sheet (7) of the dust collector. The irregularly shaped sealing ring groove (6) is fitted with the inner wall of the irregularly shaped tube sheet hole (8). The variable pleat spacing irregularly shaped filter cartridge adopts a matching irregularly shaped sealing ring (5). The structure of the irregularly shaped cover (2) and the sealing ring is similar to the shape of the irregularly shaped sealing ring (5). Its cross-sectional outer contour is obtained by reducing the irregularly shaped cross section of the irregularly shaped sealing ring (5) inward at equal intervals. The cross-sectional outer contour of the irregularly shaped cover (2) is composed of a straight line segment and a non-continuous arc segment, or only a non-continuous arc segment. If there is a straight line segment, the straight line segment is located in the windward section. The irregularly shaped sealing ring (5) has an irregularly shaped sealing ring groove (6) that is adapted to the thickness of the tube sheet (7) of the dust collector.

9. A variable-pleat spacing irregularly shaped filter cartridge according to claim 8, characterized in that: The variable-pitch irregular filter cartridge adopts an irregularly shaped perforated plate (8) with a matching shape. The irregularly shaped perforated plate (8) and the irregularly shaped sealing ring groove (6) are fitted with the structural dimensions. The opening contour of the irregularly shaped perforated plate (8) is similar to the outer contour of the irregularly shaped cover (2) and the irregularly shaped sealing ring (5). It is obtained by scaling the irregularly shaped outer cross section of the irregularly shaped sealing ring groove (6) outward at equal intervals. The cross section of the irregularly shaped perforated plate (8) is composed of straight segments and discontinuous arc segments, or only discontinuous arc segments. If there are straight segments, the straight segments are located in the windward section.

10. A variable-pleat spacing irregularly shaped filter cartridge according to claim 9, characterized in that: The irregularly shaped cover (2), irregularly shaped sealing ring (5), and irregularly shaped perforated plate hole (8) are provided with irregularly shaped protruding parts, which serve as positioning and guiding mechanisms for the irregularly shaped filter material and the irregularly shaped cover (2) to be glued together, for the irregularly shaped sealing ring (5) and the irregularly shaped perforated plate hole (8) to be assembled, and for the filter cartridge (1) to be installed on the machine with the irregularly shaped sealing ring (5) and the irregularly shaped perforated plate hole (8). The vertices of the positioning and guiding mechanisms of the protruding parts of the irregularly shaped cover (2), the irregularly shaped sealing ring (5), and the perforated plate (7) are A1, A2, and A3, respectively. The positioning points A1, A2, and A3 are all located on the axis of symmetry of the irregularly shaped cross section of the folded filter material. During assembly, they are opposite to the air inlet (10) of the dust collector (9). The irregularly shaped filter cartridge with variable pleat spacing cooperates with the irregularly shaped cover (2), the irregularly shaped sealing ring (5), and the irregularly shaped perforated plate hole (8) to form an irregularly shaped geometric constraint structure to achieve the function of limiting the slippage, loosening, and sealing of each component of the filter cartridge (1).

11. The variable pleat spacing irregularly shaped filter cartridge according to claim 1, characterized in that: The variable pleat spacing irregular-shaped filter cartridge has a pleat spacing-to-pleat depth ratio greater than 0.5 in the windward section of the pleated filter media, and a pleat spacing-to-pleat depth ratio between 0.2 and 0.5 in the non-windward section of the filter media.

12. The variable pleat spacing irregularly shaped filter cartridge according to claim 11, characterized in that: Under standard and difficult-to-clean conditions, the maximum diameter H (in mm) of the variable-pleat-gap irregular-shaped filter cartridge satisfies the following relationship with the number of pleats n: standard type n≤0.05H+36.5, easy-to-clean type n≤0.15H+16.

5.

13. A dust collector comprising a variable-pleat spacing irregularly shaped filter cartridge as described in any one of claims 1-12, characterized in that: The dust collector includes a dust collector body (9), inside which a filter cartridge (1) is provided. An air inlet (10) is provided at the upper front end of the dust collector body (9), and an air outlet (11) is provided at the lower rear end of the dust collector body (9). The air inlet (10) is opposite to the windward section of the variable pleat spacing irregular filter cartridge, and the air outlet (11) is opposite to the non-windward section of the variable pleat spacing irregular filter cartridge. The blowpipe (12) of the irregular filter cartridge dust collector adopts a slanted section blowpipe design and asymmetric flow guiding directional blowpipe.

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