Dedusting filter cartridge assembly and sealing structure thereof

Abstract

The invention relates to the technical field of dust removal systems, and discloses a dust removal filter cartridge assembly and a sealing structure thereof, an annular sealing part and a head cover of the dust removal filter cartridge assembly adopt an embedded design, close fit is ensured, the sealing performance of the head cover is improved, and the outer diameter of the annular sealing part adopts a special-shaped clamping design. The annular sealing part and the head cover of the filter cartridge body can be directly inserted into a dust collector tubesheet and are tightly attached to the dust collector tubesheet through the rebound tension of the material of the sealing part, the problems that an existing dust collector filter cartridge body is complex in installation and poor in sealing effect are solved, the head cover is convenient to install, stable work of a dust collector is effectively guaranteed, and the service life of the dust collector is prolonged. According to the utility model, the structure is simple, the use and maintenance cost is reduced, the dust removal effect of the dust remover is improved through the design of the head cover integrated flow guide pipe, meanwhile, the labor cost loss of secondary processing of the venturi tube of the filter cartridge body is reduced, and the filter cartridge has the advantages of leakage prevention, low resistance, easiness in disassembly and assembly, integration, long service life, good perpendicularity and the like, and has wide application prospect and popularization value.

Description

Technical Field

[0001] The present invention relates to the technical field of dust removal systems, and particularly to a dust removal filter cartridge assembly and its sealing structure. Background Art

[0002] With the continuous improvement of domestic environmental protection awareness, dust collectors, as important environmental protection equipment, have been widely used in industrial production. The filter cartridge body, as the core component of the dust collector, is widely used in various dust removal equipment. Therefore, the safe and stable operation of the filter cartridge body is the key to ensuring compliance with emissions standards, personal health, and reducing environmental pollution;

[0003] The traditional sealing methods of the folded filter cartridge body mainly include split sealing rings, cloth bag heads, gland covers, and expansion rings, etc. However, these methods often have some obvious deficiencies. For example, the traditional installation process is cumbersome and complex, resulting in low installation efficiency: improper installation leads to poor airtightness or even leakage, reducing the working efficiency of the dust collector; frequent maintenance and replacement increase labor costs and material costs: insufficient perpendicularity between the filter cartridge body and the installation plate hole leads to uneven stress, resulting in problems such as collision, friction, and dust bridging at the bottom of the filter cartridge body: serious dust accumulation occurs during the use of the filter cartridge body, resulting in too high resistance of the dust collector and thus affecting the dust cleaning effect: the binding straps break and the bottom cover falls off during the use of the filter cartridge body, resulting in the scrapping of the filter cartridge body, thereby reducing its service life: the opening rate of the filter cartridge body skeleton is relatively low, and at the same time, the processing of long skeletons is difficult, costly, and the size and perpendicularity are prone to deviation. Summary of the Invention

[0004] (1) Technical Problems to be Solved

[0005] Aiming at the deficiencies of the prior art, the present invention provides a dust removal filter cartridge assembly and its sealing structure. Its annular sealing part and the head cover adopt an embedded design to ensure a tight fit, improving the sealing performance of the head cover. The outer diameter of the annular sealing part adopts a special-shaped clamping design, so that the annular sealing part and the head cover of the filter cartridge body can be directly inserted into the dust collector flower plate, and are closely attached to the dust collector flower plate through the resilience expansion force of the sealing part material, solving the problems of complex installation and poor sealing effect of the existing dust collector filter cartridge body. Moreover, the installation method of the head cover is convenient, effectively ensuring the stable operation of the dust collector, reducing the use and maintenance costs. The integrated diversion pipe design of the head cover improves the dust cleaning effect of the dust collector, and at the same time reduces the labor cost loss of the secondary processing of the venturi tube of the filter cartridge body, having the advantages of leak prevention, low resistance, easy disassembly and assembly, integration, long service life, and good perpendicularity, and having broad application prospects and promotion value.

[0006] (2) Technical Solutions

[0007] To solve the above technical problems, the present invention provides the following technical solutions: A dust removal filter cartridge assembly includes a dust collector and a head cover. A filter cartridge body is arranged inside the dust collector. An inner thread of the first framework is arranged on the inner side of the top of the filter cartridge body. An outer thread of the first framework is arranged on the outer side of the bottom of the filter cartridge body. A second framework body is arranged at the bottom of the filter cartridge body. An inner thread of the second framework is arranged on the inner side of the top of the second framework body, and the inner thread of the second framework is spirally engaged with the outer thread of the first framework arranged on the outer side of the bottom of the filter cartridge body. A filter material is sleeved outside the filter cartridge body and the second framework body. A binding band is arranged outside the filter material. The spacing of the binding bands is distributed in a gradient along the length direction of the filter material, and the spacing difference is 2-5 mm. A bottom cover is arranged at the inner bottom end of the second framework body. An anti-detachment buckle is arranged in the middle of the inner side of the bottom cover, and the outer side of the anti-detachment buckle is snap-fitted and fixed with the inner side of the bottom of the second framework body. A bottom strengthening rib is fixedly connected to the bottom of the bottom cover. A head cover is spirally connected to the inner side of the inner thread of the first framework at the top of the filter cartridge body. The pitch of the outer thread of the first framework and the inner thread of the second framework is X mm, and the thread depth is Y mm, satisfying X / Y = 1.5-2.0. The anti-detachment buckle is a three-claw elastic buckle. The claw part of the anti-detachment buckle cooperates with the annular groove on the inner side of the second framework body, and the height of the anti-detachment buckle is 0.7-0.9 times the height of the boss.

[0008] Preferably, the whole of the filter cartridge body and the second framework body is composed of transverse ribs and longitudinal ribs. The width of the transverse ribs of the filter cartridge body and the second framework body is greater than the width of the longitudinal ribs. The width dimension of the transverse ribs is less than 1.5 times the width dimension of the longitudinal ribs and greater than the width dimension of the longitudinal ribs. The total surface area of the transverse and longitudinal ribs of the filter cartridge body and the second framework body accounts for less than 50% of the overall framework surface area. The width of the transverse ribs is 1.2-1.4 times the width of the longitudinal ribs, and the spacing ratio of the transverse ribs to the longitudinal ribs is 2:1.

[0009] Preferably, the outer wall of the bottom cover adopts a necking design. A circular boss is arranged at the central position of the inner side of the bottom cover, and the anti-detachment buckle is located inside the circular boss. At the same time, the height of the anti-detachment buckle is greater than 0.5 times the height of the boss.

[0010] Preferably, a blow-by diversion hole is opened in the middle of the head cover. An inner hole and outer thread structure is arranged at the connection between the head cover and the inner thread of the first framework. A strengthening transverse rib is fixedly connected above the inner side of the head cover. A strengthening longitudinal rib is arranged on the inner ring of the head cover. An outer ring rib is arranged on the outer side of the top end below the head cover;

[0011] A ring-shaped sealing part or a strip-shaped sealing part is arranged on the outer side of the head cover. When a ring-shaped sealing part is arranged on the outer side of the head cover, an outer ring rib is arranged on the outer side of the head cover, and a first clamping groove is formed in the inner side of the ring-shaped sealing part. When a strip-shaped sealing part is arranged on the outer side of the head cover, an inverted triangular ring rib is further arranged on the outer side of the head cover, and a second clamping groove is formed in the inner side of the strip-shaped sealing part, and the second clamping groove is clamped with the inverted triangular ring rib.

[0012] Preferably, the maximum diameter D3 of the round belly shape of the ring-shaped sealing part is 3-5 mm larger than the diameter of the opening of the flower plate, and the included angle B between the inclined plane sealing surface and the plane sealing surface thereof is 110°-130°. The taper of the diversion pipe is 15°-25°, and a spiral diversion groove is arranged on the inner wall thereof, and the groove depth is 0.5-1.0 mm.

[0013] Preferably, the diameter of the integrated jetting diversion hole designed in the head cover is 70-90 mm. A through diversion pipe is arranged in the middle of the head cover, and the integrated jetting diversion hole is arranged at the inner center of the diversion pipe. The diversion pipe in the middle of the head cover is conical.

[0014] Preferably, the overall shape of the reinforcing transverse ribs of the head cover is strip-shaped, and multiple reinforcing transverse ribs are uniformly distributed at the bottom of the inner cavity. The reinforcing longitudinal ribs are wedge-shaped strips. The top width of the reinforcing longitudinal ribs is A1, the bottom width is A2, and A1 of the reinforcing longitudinal ribs is greater than A2. The reinforcing longitudinal ribs in the inner cavity of the head cover are distributed in pairs on the inner cavity wall of the head cover part, and the distance between the longitudinal ribs in the same group gradually decreases from the inside to the outside and is funnel-shaped. The top spacing of the reinforcing longitudinal ribs is set as A3, the bottom spacing is set as A4, and A3 of the reinforcing longitudinal ribs is greater than A4.

[0015] Preferably, the internal thread structure of the inner hole on the inner side of the head cover is in spiral fit connection with the external thread of the first skeleton, and the number of thread turns on the surface of the internal thread structure is greater than 2.

[0016] Preferably, the included angle between the plane sealing surface and the straight surface installation surface of the ring-shaped sealing part is set as angle A, angle A is an acute angle, and angle A>72°. The distance between the plane sealing surface and the straight surface installation surface of the ring-shaped sealing part is set as A5, and the distance between the inclined plane sealing surface and the plane sealing surface of the ring-shaped sealing part is set as A6. The height of A5 of the ring-shaped sealing part >0 mm, and A5<2 mm. The height of A6 is less than <10 mm, and A6 is greater than twice of A5. The structure in which the filter cartridge body and the head cover are fixed inside the dust collector is called a flower plate. The contact sealing dimension between the ring-shaped sealing part and the flower plate is set as D1, the dimension of the ring-shaped sealing part passing through the flower plate is set as D2, and the maximum diameter of the round belly shape or the folded angle shape of the ring-shaped sealing part is set as D3. The D3 dimension of the ring-shaped sealing part is 1-8 mm larger than the diameter of the opening of the flower plate.

[0017] Preferably, the angle between the straight mounting surface and the inclined sealing surface of the annular sealing part is set to angle B, and angle B is an obtuse angle. The outer side of the annular sealing part is round or angled. D1 of the annular sealing part is equal to the diameter of the flower plate hole, and D3>D1 is greater than D2.

[0018] Preferably, the head cover adopts one or more anti-falling forms, the bottoms of the annular sealing part and the strip sealing part are abutted with fixed ring ribs, the inverted triangle ring ribs are clamped with the second slot, and the outer ring ribs are clamped with the first slot.

[0019] Preferably, the top of the filter cartridge body and the head cover, the skeleton body and the bottom cover are connected and fixed as a whole by means of glue injection.

[0020] Compared with the prior art, the present invention provides a dust filter cartridge assembly and a sealing structure thereof, which has the following beneficial effects:

[0021] 1. Compared with the prior art, the present invention adopts a chimeric design of the annular sealing part and the head cover to ensure a tight fit and improve the sealing performance of the head cover. The outer diameter of the annular sealing part adopts a special-shaped card-butting design, so that the annular sealing part of the filter cartridge body and the head cover can be directly inserted into the dust collector plate. The rebound force of the sealing material is tightly fitted with the dust collector plate, solving the problems of complex installation and poor sealing effect of the existing dust collector filter cartridge body. In addition, the installation method of the head cover is convenient, which effectively ensures the stable operation of the dust collector and reduces the cost of use and maintenance. The integrated guide pipe design of the head cover improves the dust cleaning effect of the dust collector and reduces the labor cost loss of the secondary processing of the venturi tube of the filter cartridge body. The inner hole external thread structure on the inner side of the head cover is consistent with the skeleton. The internal thread is combined with the splicing length to freely combine, which solves the problems of the filter cartridge body being too long and difficult to process, and the poor connection strength: the filter cartridge body and the skeleton are spliced in sections to solve the problems of the skeleton being too long and too costly, and the skeleton being tilted: the outer wall of the bottom cover is closed, and the inner boss of the bottom cover is added with a hidden anti-falling buckle design to solve the problem of the bottom cover falling off during the use of the filter cartridge body, while extending the service life of the filter cartridge body; the binding straps are not spaced equally, and the pleat spacing is mold-positioned and hot-melt-shaped to adjust the pulse jet vibration amplitude of different parts of the filter material of the filter cartridge body during use, thereby enhancing the cleaning effect of the dust collector; the present invention has the advantages of anti-leakage, low resistance, easy disassembly and assembly, integration, long life, good verticality, etc., and has broad application prospects and promotion value.

[0022] 2. Compared with the prior art, the head cover in the present invention adopts two sealing methods. The first is the annular sealing part for sealing. The second is to replace the annular sealing part with a strip-shaped sealing part, and replace the outer ring rib on the outside of the original head cover with an inverted triangular ring rib. A second card slot identical to the first card slot on the inner side of the annular sealing part is arranged on the inner side of the strip-shaped sealing part. The shape of the first card slot corresponds to that of the outer ring rib, while the shape of the second card slot corresponds to that of the inverted triangular ring rib. Compared with the annular sealing part, the length of the strip-shaped sealing ring can be confirmed according to the size of the dust collector flower plate, and it is formed by manual bonding, reducing the mold opening cost of the annular sealing part. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the partial sectional structure of the dust collector of the present invention;

[0025] Figure 3 It is a schematic diagram of the exploded structure of the filter cartridge body of the present invention;

[0026] Figure 4 It is a schematic diagram of the overall structure of the head cover of the present invention;

[0027] Figure 5 It is a schematic diagram of the sectional structure of the head cover of the present invention;

[0028] Figure 6 It is a schematic diagram of the overall structure of the annular sealing part of the present invention;

[0029] Figure 7 It is a schematic diagram of the sectional structure of the annular sealing part of the present invention;

[0030] Figure 8 It is a schematic diagram of the combined sectional structure of the head cover and the annular sealing part of the present invention;

[0031] Figure 9 It is a schematic diagram of the overall structure of the filter material of the present invention;

[0032] Figure 10 It is a schematic diagram of the sectional structure of the filter material of the present invention;

[0033] Figure 11 It is a schematic diagram of the overall structure of the bottom cover of the present invention;

[0034] Figure 12 It is a schematic diagram of the bottom structure of the bottom cover of the present invention;

[0035] Figure 13 It is a schematic diagram of the combined sectional structure of the head cover and the strip-shaped sealing part of the present invention;

[0036] Figure 14 It is a schematic diagram of the overall structure of the strip-shaped sealing part of the present invention;

[0037] Figure 15 This is a schematic cross-sectional structure diagram of the strip-shaped sealing part of the present invention.

[0038] Among them: 1. Dust collector; 2. Filter cartridge body; 201. Binding band; 202. Inner thread of the first framework; 203. Outer thread of the first framework; 204. Body of the second framework; 205. Inner thread of the second framework; 206. Filter media; 3. Head cover; 301. Blowing diversion hole; 302. Inner hole external thread structure; 303. Reinforcing transverse rib; 304. Reinforcing longitudinal rib; 305. Fixed ring rib; 306. Outer ring rib; 307. Ring-shaped sealing part; 308. First card slot; 309. Inverted triangular ring rib; 310. Strip-shaped sealing part; 311. Second card slot; 4. Bottom cover; 401. Anti-detachment buckle; 402. Bottom reinforcing rib. Specific embodiments

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0040] Embodiment 1:

[0041] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 9 , Figure 10 , Figure 11 , Figure 12 as shown:

[0042] A dust removal filter cartridge assembly includes a dust collector 1. Inside the dust collector 1, there is a filter cartridge body 2. Inside the top of the filter cartridge body 2, there is an inner thread of the first framework 202. Outside the bottom of the filter cartridge body 2, there is an outer thread of the first framework 203. At the bottom of the filter cartridge body 2, there is a second framework body 204. Inside the top of the second framework body 204, there is an inner thread of the second framework 205, and the inner thread of the second framework 205 spirally engages with the outer thread of the first framework 203 provided outside the bottom of the filter cartridge body 2. A filter media 206 is sleeved outside the filter cartridge body 2 and the second framework body 204. Outside the filter media 206, there is a binding band 201. The spacing of the binding band 201 is distributed in a gradient along the length direction of the filter media 206, and the spacing difference is 2 - 5 mm. Through the design of the distribution of the binding band 201, it shows that it can adjust the amplitude of pulse jet vibration and enhance the dust cleaning effect. At the inner bottom end of the second framework body 204, there is a bottom cover 4. In the middle of the inner side of the bottom cover 4, there is an anti - detachment buckle 401, and the outer side of the anti - detachment buckle 401 is snap - fitted and fixed with the inner side of the bottom of the second framework body 204. At the bottom of the bottom cover 4, there is a bottom reinforcing rib 402 fixedly connected. Inside the inner thread of the first framework 202 at the top of the filter cartridge body 2, a head cover 3 is spirally connected. The pitch of the outer thread of the first framework 203 and the inner thread of the second framework 205 is X mm, and the thread depth is Y mm, satisfying X / Y = 1.5 - 2.0. Through the limitation of specific parameters, the thread connection and framework design can be optimized, and the stability and processing efficiency of the lengthened filter cartridge can be significantly improved. The anti - detachment buckle 401 is a three - claw elastic buckle. The claw part of the anti - detachment buckle 401 cooperates with the annular groove on the inner side of the second framework body 204, and the height of the anti - detachment buckle 401 is 0.7 - 0.9 times the height of the boss. Through the specific structure design, the problem of easy loosening of traditional thread connections can be solved.

[0043] In an alternative embodiment: The whole of the filter cartridge body 2 and the second framework body 204 is composed of transverse ribs and longitudinal ribs. The width of the transverse ribs of the filter cartridge body 2 and the second framework body 204 is greater than the width of the longitudinal ribs. The width dimension of the transverse ribs is less than 1.5 times the width dimension of the longitudinal ribs and greater than the width dimension of the longitudinal ribs. The total surface area of the transverse and longitudinal ribs of the filter cartridge body 2 and the second framework body 204 accounts for less than 50% of the overall framework surface area. The width of the transverse ribs is 1.2 - 1.4 times the width of the longitudinal ribs, and the spacing ratio of the transverse ribs to the longitudinal ribs is 2:1.

[0044] In this embodiment: The filter cartridge body 2 can be spliced in multiple sections to adapt to filter cartridges of different lengths. Since the lateral pressure is greater than the longitudinal pressure, the filter cartridge body 2 and the second framework body 204 bear greater lateral pressure. Widening the width of the transverse ribs can improve the lateral stress strength of the framework, prevent the transverse ribs from breaking, and effectively reduce the damage and bulging of the filter media 206 caused by increased stress on one end of the filter media 206, thereby extending the service life of the filter cartridge body 2 and improving the working efficiency of the dust collector 1.

[0045] In an alternative embodiment: The outer wall of the bottom cover 4 is designed with a necking-in structure. A circular boss is provided at the center position inside the bottom cover 4, and the anti-detachment buckle 401 is located inside the circular boss. At the same time, the height of the anti-detachment buckle 401 is greater than 0.5 times the height of the boss.

[0046] In this embodiment: This design, combined with the necking-in of the outer wall, effectively improves the connection strength between the bottom cover 4 and the filter cartridge body 2, thus solving the problem of the detachment of the bottom cover 4 of the filter cartridge body 2 and extending the service life of the filter cartridge body 2.

[0047] Embodiment Two:

[0048] Please refer to Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 13 、 Figure 14 、 Figure 15 as shown in:

[0049] A dust removal filter cartridge sealing structure includes a head cover 3. A blow - through guide hole 301 is opened in the middle inside the head cover 3. An inner - hole outer - thread structure 302 is provided at the connection between the head cover 3 and the inner - thread 202 of the first framework. A reinforcing cross - rib 303 is fixedly connected above the inner side of the head cover 3. Reinforcing longitudinal ribs 304 are arranged on the inner ring of the head cover 3. An outer - ring rib 306 is provided on the outer side of the top end of the head cover 3. A ring - shaped sealing part 307 or a strip - shaped sealing part 310 is provided on the outer side of the head cover 3. When the ring - shaped sealing part 307 is provided on the outer side of the head cover 3, the outer - ring rib 306 is provided on the outer side of the head cover 3, and a first card slot 308 is opened inside the ring - shaped sealing part 307. When the strip - shaped sealing part 310 is provided on the outer side of the head cover 3, an inverted - triangle ring rib 309 is further provided on the outer side of the head cover 3, and a second card slot 311 is opened inside the strip - shaped sealing part 310, and the second card slot 311 is engaged with the inverted - triangle ring rib 309.

[0050] In this embodiment: The ring - shaped sealing part 307 and the head cover 3 adopt an inlay design to ensure a tight fit, improving the sealing performance of the head cover 3. The outer diameter of the ring - shaped sealing part 307 adopts a special - shaped clamping design, enabling the ring - shaped sealing part 307 of the filter cartridge body 2 and the head cover 3 to be directly inserted into the dust collector 1's flower plate. Through the resilience expansion force of the sealing part material, it is closely attached to the dust collector 1's flower plate, solving the problems of complex installation and poor sealing effect of the existing dust collector 1's filter cartridge body 2.

[0051] In an alternative embodiment: The maximum diameter D3 of the round - belly shape of the ring - shaped sealing part 307 is 3 - 5 mm larger than the diameter of the opening of the flower plate, and the angle B between its inclined - plane sealing surface and the flat - plane sealing surface is 110° - 130°. The taper of the guide pipe 301 is 15° - 25°, and spiral guide grooves are provided on its inner wall with a groove depth of 0.5 - 1.0 mm. Through specific structural optimization, the dust - cleaning effect is improved.

[0052] In an alternative embodiment: the diameter of the integrated jet guide hole 301 designed in the head 3 is 70-90 mm. A through guide pipe is arranged in the middle of the inside of the head 3, and the integrated jet guide hole 301 is arranged at the inner center of the guide pipe. The guide pipe in the middle of the inside of the head 3 is conical.

[0053] In this embodiment: the function of the guide pipe is similar to that of a venturi tube to increase the pulsed jet airflow and improve the dust cleaning efficiency of the filter cartridge body 2.

[0054] In an alternative embodiment: the overall shape of the reinforcing cross ribs 303 of the head 3 is strip-shaped, and multiple reinforcing cross ribs 303 are evenly distributed at the bottom of the inner cavity. The reinforcing longitudinal ribs 304 are wedge-shaped strips. The top width of the reinforcing longitudinal ribs 304 is A1, the bottom width is A2, and A1 of the reinforcing longitudinal ribs 304 is greater than A2. The reinforcing longitudinal ribs 304 in the inner cavity of the head 3 are distributed in pairs on the inner cavity wall of the head 3, and the distance between the longitudinal ribs in the same group gradually decreases from the inside to the outside and is funnel-shaped. The top spacing of the reinforcing longitudinal ribs 304 is set as A3, the bottom spacing is set as A4, and A3 of the reinforcing longitudinal ribs 304 is greater than A4.

[0055] In this embodiment: after the head 3 is injected with glue, a clamping position is formed to prevent the filter cartridge body 2 from separating from the head 3 during use.

[0056] In an alternative embodiment: the internal hole external thread structure 302 on the inner side of the head 3 is in spiral fit connection with the external thread 203 of the first skeleton, and the number of thread turns on the surface of the internal hole external thread structure 302 is greater than 2.

[0057] In this embodiment: the connection strength and perpendicularity between the filter cartridge body 2 and the head 3 can be ensured; at the same time, the perpendicularity of the installation of the filter cartridge body 2 during use is ensured, so that the overall force is more uniform, and the phenomenon that the bottom of the filter cartridge body 2 touches and bridges is avoided.

[0058] In an alternative embodiment: the included angle between the plane sealing surface and the straight surface installation surface of the annular sealing part 307 is set as angle A, angle A is an acute angle, and angle A is greater than 72°. The distance between the plane sealing surface and the straight surface installation surface of the annular sealing part 307 is set as A5, and the distance between the inclined surface sealing surface and the plane sealing surface of the annular sealing part 307 is set as A6. The height of A5 of the annular sealing part 307 is > 0 mm and less than 2 mm, the height of A6 is less than 10 mm and greater than 2 times of A5. The structure in which the filter cartridge body 2 and the head 3 are fixed inside the dust collector 1 is called a perforated plate. The contact sealing dimension between the annular sealing part 307 and the perforated plate is set as D1, the dimension of the annular sealing part 307 passing through the perforated plate is set as D2, and the maximum diameter of the round belly shape or the folded corner shape of the annular sealing part 307 is set as D3. The D3 dimension of the annular sealing part 307 is 1-8 mm larger than the perforated plate opening diameter.

[0059] In this embodiment: Ensure good sealing performance during the long-term use of the filter cartridge body 2 to prevent dust leakage.

[0060] In an alternative embodiment: The angle between the straight mounting surface and the inclined sealing surface of the annular sealing portion 307 is set as angle B, and angle B is an obtuse angle. The outer side of the annular sealing portion 307 is designed as a round-bellied shape or a folded-corner shape. D1 of the annular sealing portion 307 is equal to the diameter of the ceiling hole, and D3 > D1 > D2.

[0061] In this embodiment: Reduce the installation difficulty of the filter cartridge body 2, improve the stability of the sealing portion, prevent the sealing portion from falling off during use, ensure the airtightness of the sealing portion, and enable the sealing portion to have the characteristics of easy disassembly and assembly, anti-dropping, and high airtightness.

[0062] In an alternative embodiment: The head cover 3 adopts one or more anti-dropping forms. A fixing ring rib 305 abuts against the bottoms of the annular sealing portion 307 and the strip-shaped sealing portion 310. The inverted triangular ring rib 309 is clamped with the second card slot 311, and the outer ring rib 306 is clamped with the first card slot 308.

[0063] In this embodiment: Prevent the sealing portion from falling off the head cover 3 during disassembly and assembly, and improve the anti-blowing and sealing performance of the head cover 3.

[0064] In an alternative embodiment: The overall structure formed by connecting the top of the filter cartridge body 2 with the head cover 3 and the skeleton two body 204 with the bottom cover 4 is connected and fixed by means of potting.

[0065] In this embodiment: The internal hole external thread structure 302 thread in the head cover 3 and the anti-dropping buckle 401 of the bottom cover 4 can prevent the glue connection from falling off due to insufficient strength.

[0066] Working principle: Insert the outer thread 203 of the first skeleton at the bottom of the filter cartridge body 2 into the inner thread 205 of the second skeleton on the inner side of the top of the second skeleton body 204 and rotate until the filter cartridge body 2 connects and fixes the second skeleton body 204. Subsequently, put the filter media 206 on the outer sides of the filter cartridge body 2 and the second skeleton body 204, and perform hot melt bonding with the top of the pleats of the filter media 206 using the binding tape 201 to ensure that the pleat spacing of the filter media 206 is uniform and enhance the bonding strength, thereby improving the filtering and dust cleaning effects of the filter cartridge body 2;

[0067] There are two ways to install the head cover 3, namely installing the annular sealing part 307 and the strip-shaped sealing part 310. The first method is to use the annular sealing part 307. The annular sealing part 307 is sleeved on the outside of the head cover 3. At this time, the first clamping groove 308 inside the annular sealing part 307 is aligned with the outer ring rib 306 at the edge of the head cover 3, and the fixing ring rib 305 on the outside of the bottom of the head cover 3 is stuck at the bottom of the annular sealing part 307. The second method uses the strip-shaped sealing part 310. The length of the strip-shaped sealing ring is confirmed according to the size of the flower plate of the dust collector 1 and formed by manual bonding, reducing the mold opening cost of the annular sealing part 307. At the same time, the fixing ring rib 305 at the edge of the head cover 3 is changed to an inverted triangular ring rib 309, which is engaged with the second clamping groove 311 inside the strip-shaped sealing part 310. After the two types of head covers 3 are assembled, the head cover 3 is installed on the top of the filter cartridge body 2. The internal thread structure 302 on the upper inner side of the head cover 3 contacts the inner thread 202 of the first skeleton at the top inner side of the filter cartridge body 2 and rotates until the head cover 3 and the filter cartridge body 2 are completely installed. Then, the bottom cover 4 is sleeved on the outside of the bottom of the second skeleton body 204 from bottom to top. The outer wall of the bottom cover 4 adopts a necking design. Compared with the traditional straight-edge design, the necking design effectively reduces the risk of the connection strength between the second skeleton body 204 and the bottom cover 4 decreasing during long-term jet blowing. And the bottom cover 4 is provided with a circular boss, which provides necessary space for the anti-detachment buckle 401 and provides a positioning function for the installation of the second skeleton body 204, ensuring the correct installation of the filter material 206 and the second skeleton body 204 during the assembly process of the filter cartridge body 2. Multiple anti-detachment buckles 401 are designed inside the boss of the bottom cover 4. At the same time, the height of the anti-detachment buckle 401 accounts for 70% of the height of the boss. This design combined with the necking of the outer wall effectively improves the connection strength between the bottom cover 4 and the filter cartridge body 2, thus solving the problem of the bottom cover 4 of the filter cartridge body 2 falling off and extending the service life of the filter cartridge body 2. At the same time, evenly distributed bottom reinforcing ribs 402 are added to the center of the outer bottom of the bottom cover 4. These bottom reinforcing ribs 402 enhance the overall strength of the bottom cover 4 and effectively prevent problems such as cracking or deformation during use. After the head cover 3 and the bottom cover 4 are installed, the filter cartridge body 2 can be inserted into the flower plate inside the dust collector 1 from top to bottom for fixation.

[0068] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dust removal filter cartridge assembly, comprising a dust collector (1) and a head cover (3), characterized in that: Inside the dust collector (1), a filter cartridge body (2) is provided. Inside the top of the filter cartridge body (2), a first-frame internal thread (202) is provided. Outside the bottom of the filter cartridge body (2), a first-frame external thread (203) is provided. At the bottom of the filter cartridge body (2), a second-frame body (204) is provided. Inside the top of the second-frame body (204), a second-frame internal thread (205) is provided, and the second-frame internal thread (205) is helically engaged with the first-frame external thread (203) provided outside the bottom of the filter cartridge body (2). A filter medium (206) is sleeved outside the filter cartridge body (2) and the second-frame body (204). Outside the filter medium (206), a binding band (201) is provided. The spacing of the binding band (201) is distributed in a gradient along the length direction of the filter medium (206), and the spacing difference is 2 - 5 mm. At the inner bottom end of the second-frame body (204), a bottom cover (4) is provided. In the middle of the inner side of the bottom cover (4), an anti-detachment buckle (401) is provided, and the outside of the anti-detachment buckle (401) is snap-fitted and fixed to the inner bottom of the second-frame body (204). At the bottom of the bottom cover (4), a bottom reinforcing rib (402) is fixedly connected. The first-frame internal thread (202) inside the top of the filter cartridge body (2) is helically connected to a top cover (3). The pitch of the first-frame external thread (203) and the second-frame internal thread (205) is X mm, and the thread depth is Y mm, satisfying X / Y = 1.5 - 2.

0. The anti-detachment buckle (401) is a three-claw elastic buckle. The claw part of the anti-detachment buckle (401) cooperates with the annular groove inside the second-frame body (204), and the height of the anti-detachment buckle (401) is 0.7 - 0.9 times the height of the boss.

2. The dust removal filter cartridge assembly according to claim 1, wherein: The whole of the filter cartridge body (2) and the second-frame body (204) is composed of transverse ribs and longitudinal ribs. The width of the transverse ribs of the filter cartridge body (2) and the second-frame body (204) is greater than the width of the longitudinal ribs. The width dimension of the transverse ribs is less than 1.5 times the width dimension of the longitudinal ribs and greater than the width dimension of the longitudinal ribs. The total surface area of the transverse and longitudinal ribs of the filter cartridge body (2) and the second-frame body (204) accounts for less than 50% of the overall frame surface area. The width of the transverse ribs is 1.2 - 1.4 times the width of the longitudinal ribs, and the spacing ratio of the transverse ribs to the longitudinal ribs is 2:

1.

3. The dust removal cartridge assembly according to claim 1, characterized in that: The outer wall of the bottom cover (4) adopts a necking design. At the center position inside the bottom cover (4), a circular boss is provided, and the anti-detachment buckle (401) is located inside the circular boss. At the same time, the height of the anti-detachment buckle (401) is greater than 0.5 times the height of the boss.

4. The dust removal filter cartridge assembly according to claim 1, wherein: In the middle of the top cover (3), a blow-by diversion hole (301) is provided. At the connection between the top cover (3) and the first-frame internal thread (202), an inner-hole external thread structure (302) is provided. Above the inner side of the top cover (3), a reinforcing transverse rib (303) is fixedly connected. Inside the inner circle of the top cover (3), a reinforcing longitudinal rib (304) is provided. Outside the top end below the top cover (3), an outer ring rib (306) is provided. A circular sealing portion (307) or a strip-shaped sealing portion (310) is provided on the outer side of the head cover (3). When the circular sealing portion (307) is provided on the outer side of the head cover (3), an outer ring rib (306) is provided on the outer side of the head cover (3), and a first card slot (308) is opened on the inner side of the circular sealing portion (307). When the strip-shaped sealing portion (310) is provided on the outer side of the head cover (3), an inverted triangular ring rib (309) is further provided on the outer side of the head cover (3), and a second card slot (311) is opened on the inner side of the strip-shaped sealing portion (310), and the second card slot (311) is engaged with the inverted triangular ring rib (309).

5. A dust removal filter cartridge assembly according to claim 4, characterized in that: The maximum diameter D3 of the round belly shape of the circular sealing portion (307) is 3-5 mm larger than the diameter of the opening of the flower plate, and the included angle B between its inclined sealing surface and the flat sealing surface is 110°-130°. The taper of the flow guide tube (301) is 15°-25°, and a spiral flow guide groove is provided on its inner wall, and the groove depth is 0.5-1.0 mm.

6. The dust removal filter cartridge sealing structure according to claim 4, wherein: The diameter of the integrated spray and flow guide holes (301) designed inside the head cover (3) is 70-90 mm. A through flow guide tube is provided in the middle of the inside of the head cover (3), and the integrated spray and flow guide holes (301) are provided at the inner center of the flow guide tube. The flow guide tube in the middle of the inside of the head cover (3) is conical.

7. A dust removal filter cartridge sealing structure according to claim 4, characterized in that: The reinforcing transverse ribs (303) of the head cover (3) are in a strip shape as a whole, and multiple reinforcing transverse ribs (303) are evenly distributed at the bottom of the inner cavity. The reinforcing longitudinal ribs (304) are in a wedge-shaped strip shape. The top width of the reinforcing longitudinal ribs (304) is A1, the bottom width is A2, and A1 of the reinforcing longitudinal ribs (304) is greater than A2. The reinforcing longitudinal ribs (304) in the inner cavity of the head cover (3) are distributed in pairs on the inner cavity wall of the head cover (3) part, and the distance between the longitudinal ribs in the same group gradually decreases from the inside to the outside and is in a funnel shape. The top spacing of the reinforcing longitudinal ribs (304) is set as A3, the bottom spacing is set as A4, and A3 of the reinforcing longitudinal ribs (304) is greater than A4.

8. A dust removal filter cartridge sealing structure according to claim 4, characterized in that: The internal hole external thread structure (302) on the inner side of the head cover (3) is in spiral fit connection with the external thread of the first skeleton (203), and the number of thread turns on the surface of the internal hole external thread structure (302) is greater than 2.

9. The dust removal filter cartridge sealing structure according to claim 4, characterized in that: The included angle between the plane sealing surface of the annular sealing portion (307) and the straight mounting surface is set as angle A, angle A is an acute angle, and angle A>72°, the distance between the plane sealing surface of the annular sealing portion (307) and the straight mounting surface is set as A5, and the distance between the inclined sealing surface of the annular sealing portion (307) and the plane sealing surface is set as A6, the height of A5 of the annular sealing portion (307) is>0mm, and A5<2mm, the height of A6 is less than<10mm, and A6 is greater than twice of A5, the structure in which the filter cartridge body (2) and the head cover (3) are fixed inside the dust collector (1) is called a flower plate, and the sealing dimension of the annular sealing portion (307) in contact with the flower plate is set as D1, the dimension of the annular sealing portion (307) passing through the flower plate is set as D2, and the maximum diameter of the round belly or angled shape of the annular sealing portion (307) is set as D3, and the dimension D3 of the annular sealing portion (307) is 1-8mm larger than the diameter of the flower plate opening.

10. A dust removal filter cartridge sealing structure according to claim 4, characterized in that: The included angle between the straight mounting surface and the inclined sealing surface of the annular sealing portion (307) is set to angle B, and angle B is an obtuse angle. The outer side of the annular sealing portion (307) is designed to be round or angled. D1 of the annular sealing portion (307) is equal to the diameter of the flower plate hole, and D3>D1 is greater than D2.

11. A dust removal filter cartridge sealing structure according to claim 4, characterized in that: The head cover (3) adopts one or more anti-dropping forms, the bottoms of the annular sealing portion (307) and the strip sealing portion (310) are abutted with a fixed annular rib (305), the inverted triangular annular rib (309) is clamped with the second clamping groove (311), and the outer annular rib (306) is clamped with the first clamping groove (308).

12. The dust removal filter cartridge sealing structure according to claim 4, wherein: The top of the filter cartridge body (2) and the head cover (3), the second skeleton body (204) and the bottom cover (4) are connected and fixed as a whole by means of glue injection.

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