A snap-fit bag filter frame and bag filter

Abstract

The utility model provides a kind of to buckle formula bag filter frame and bag filter, it includes: first assembly component, first assembly component includes first frame body and first clamping frame, and it is equipped with clamping piece on first clamping frame, and clamping piece includes elastic protruding part;Second assembly component, second assembly component includes second frame body and second clamping frame, and second clamping frame is correspondingly set with first clamping frame, and it is equipped with clamping groove thereon, and elastic protruding part can be embedded in clamping groove.The utility model has realized the quick clamping of the filter bag and lossless assembly, and there is no additional tool in the whole operation, and the replacement efficiency of single filter bag is significantly improved.First assembly component and second assembly component are all used integrated structure, not only reduce the number of parts, but also eliminate the assembly error caused by the cooperation tolerance of multiple components, truly realize the multiple optimization of structure simplification, cost reduction and use convenience, and have broad use prospect in this industry.

Description

Technical Field

[0001] This utility model relates to the technical field of bag air filter element support structure, specifically to a snap-on bag filter frame and a bag filter. Background Technology

[0002] In fields such as air purification, air conditioning systems, and automotive engines, which rely on air cleanliness, air filters are core components, and their performance directly depends on the stable operating state of the filter element. The bag-type mounting frame, as a key support structure for the filter element, ensures that filtration efficiency is not affected by filter element deformation or displacement by fixing the filter element's shape and maintaining the stability of the airflow channel. It is a fundamental component ensuring the long-term reliable operation of the filtration system.

[0003] Traditional bag-type mounting frames have significant limitations in their structural design: they are typically assembled from multiple independent components such as frame strips, plastic pressure bars, plastic strips, and pressure plates, each requiring individual assembly via screws or welding. This multi-component, discrete structure leads to a series of problems: Multi-component design necessitates the development of multiple sets of molds, significantly increasing mold costs. Furthermore, the manufacturing processes for different components differ: frame strips require injection molding, while sheet metal requires stamping, resulting in a complex production process and high unit production costs. During assembly, micro-components are prone to misalignment and loss, leading to lower assembly efficiency compared to integrated structures. Simultaneously, the finished product yield is limited due to factors such as component fit tolerances. Moreover, the assembled multi-component frame experiences structural vibrations under high-speed airflow impact due to insufficient rigidity at connection points, generating noise and accelerating component fatigue, necessitating increased maintenance measures and further driving up overall production costs.

[0004] The densely arranged connecting beam array structure of traditional bag filter frames induces airflow boundary layer separation, significantly increasing system wind resistance and reducing the effective filtration area. At the same time, the process of fixing the filter bags to the gaps between the connecting beams with sealant makes it time-consuming to remove residual sealant during replacement, and violent cleaning is more likely to damage the frame sealing surface, causing the frame to be destroyed.

[0005] Therefore, how to optimize the overall structure of the bag filter mounting frame, reduce the number of parts, optimize the assembly process, and reduce production costs and improve ease of use while ensuring support strength and filter element fixation reliability has become an urgent technical problem to be solved in the current design field of bag filter mounting frames. Summary of the Invention

[0006] Therefore, the technical problem to be solved by this utility model is to overcome the problems of complex parts, low stability and convenience of use of the existing bag filter mounting frame, and to provide a snap-on bag filter frame and bag filter.

[0007] To solve the above-mentioned technical problems, this utility model provides a snap-on bag filter frame, comprising: a first assembly assembly, the first assembly assembly including a first frame and a plurality of first snap-fit ​​frames, the plurality of first snap-fit ​​frames being respectively connected to the first frame and arranged at intervals along a first direction, each of the first snap-fit ​​frames having at least one snap-fit ​​member, the snap-fit ​​member including an elastic protrusion protruding towards the interior of the corresponding first snap-fit ​​frame; and a second assembly assembly, the second assembly assembly including a second frame and a plurality of second snap-fit ​​frames, the plurality of second snap-fit ​​frames being respectively connected to the second frame and corresponding one-to-one with the plurality of first snap-fit ​​frames, each of the second snap-fit ​​frames having at least one snap-fit ​​groove, the elastic protrusion being able to be embedded in the snap-fit ​​groove.

[0008] In one embodiment of the present invention, a first snap-fit ​​frame is provided with a plurality of snap-fit ​​components, the plurality of snap-fit ​​components are arranged around the edge of the first snap-fit ​​frame, and a second snap-fit ​​frame is provided with a plurality of snap-fit ​​slots, the plurality of snap-fit ​​slots being configured one-to-one with the plurality of snap-fit ​​components.

[0009] In one embodiment of the present invention, the first snap-fit ​​frame is provided with a mounting groove, and the snap-fit ​​component further includes a connecting arm, which is embedded in the mounting groove, and the elastic protrusion is connected to the end of the connecting arm.

[0010] In one embodiment of the present invention, the elastic protrusion includes a guide slope and a snap-fit ​​surface. The snap-fit ​​surface is disposed perpendicular to the side wall of the first frame and extends toward the interior of the first frame. In the snap-fit ​​movement direction of the first frame, the guide slope extends obliquely from the snap-fit ​​surface toward the side wall of the first frame.

[0011] In one embodiment of the present invention, the first frame is provided with at least one positioning plate, and the second frame is provided with at least one positioning groove, wherein the positioning plate can be inserted into the positioning groove.

[0012] In one embodiment of the present invention, the second assembly component further includes a plurality of support components, which are respectively disposed between two adjacent second snap-fit ​​frames and are disposed corresponding to the positioning groove.

[0013] In one embodiment of the present invention, the support assembly includes two abutment plates and at least one support column, with both ends of the support column connected to the two abutment plates respectively, and the two abutment plates respectively abutting against the snap-fit ​​grooves of two adjacent second snap-fit ​​frames.

[0014] In one embodiment of the present invention, the snap-on bag filter frame further includes sound insulation cotton, which is filled between the first frame and the second frame.

[0015] In one embodiment of the present invention, the first frame includes a first side frame and a plurality of first connecting beams, and the plurality of first snap-fit ​​frames are respectively connected to the plurality of first connecting beams; the second frame includes a second side frame and a plurality of second connecting beams, and the plurality of second snap-fit ​​frames are respectively connected to the plurality of second connecting beams.

[0016] This utility model also provides a bag filter, which includes the above-mentioned snap-fit ​​bag filter frame and filter bag, wherein the air inlet edge of the filter bag is clamped and fixed between a plurality of first snap-fit ​​frames and a plurality of second snap-fit ​​frames.

[0017] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art: The snap-fit ​​bag filter frame and bag filter of this invention achieve rapid clamping and non-destructive assembly of the filter bag through the high-precision fit between the first and second assembly components. No additional tools are required throughout the operation, significantly improving the replacement efficiency of a single filter bag. Both the first and second assembly components adopt an integrated structure, completely eliminating the need to assemble discrete components such as frame bars, pressure rods, and pressure plates in traditional designs. This not only reduces the number of parts but also eliminates assembly errors caused by tolerances in the fit of multiple parts. This integrated design, while ensuring support strength and reliable filter bag fixation, significantly reduces mold development costs and production time, truly achieving multiple optimizations in structure simplification, cost reduction, and ease of use. It is particularly suitable for scenarios with high requirements for maintenance efficiency and filtration stability, such as air conditioning systems and cleanrooms. Attached Figure Description

[0018] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0019] Figure 1 This is a three-dimensional structural diagram of the buckle bag filter frame in a preferred embodiment of the present invention; Figure 2 yes Figure 1 The diagram shows a three-dimensional structural schematic of the first assembly component in the snap-on bag filter frame. Figure 3 yes Figure 2 Enlarged structural diagram at point B; Figure 4 yes Figure 1 A three-dimensional structural schematic diagram of the second assembly component in the snap-on bag filter frame is shown. Figure 5 yes Figure 4 Enlarged structural diagram at point C; Figure 6 yes Figure 4 Enlarged structural diagram at point D; Figure 7 yes Figure 1 Cross-sectional structural diagram at point AA.

[0020] Explanation of reference numerals in the accompanying drawings: 100, First assembly component; 110, First frame; 111, Positioning plate; 112, First side frame; 113, First connecting beam; 120, First snap-fit ​​frame; 121, Mounting groove; 130, Snap-fit ​​piece; 131, Connecting arm; 132, Elastic protrusion; 200, Second assembly component; 210, Second frame; 211, Second side frame; 212, Second connecting beam; 213, Positioning groove; 220, Second snap-fit ​​frame; 221, Snap-fit ​​groove; 230, Support component; 231, Abutment plate; 232, Support column; 300, Sound insulation cotton; X, First direction; Y, Second direction; Z, Third direction. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0022] It should be noted that in current conventional bag filters, the assembly frame consists of numerous parts, typically composed of frame bars, plastic pressure rods, plastic strips, pressure plates, and other independent components. These components must be assembled one by one using methods such as snap-fit, screw fastening, or ultrasonic welding. This multi-part discrete structure not only increases the investment in molds during the production stage but also adds complexity to the assembly process. Furthermore, the seams between the seams easily become dead zones for dust accumulation, affecting the cleaning and maintenance of the filter. After long-term use, loosening of the connection points may lead to filter bag fixation failure, thereby reducing filtration efficiency. Based on the above problems, this application proposes the following solution: Example 1

[0023] See Figure 1As shown, this embodiment provides a snap-on bag filter frame, comprising: a first assembly assembly 100, the first assembly assembly 100 including a first frame 110 and a plurality of first snap-fit ​​frames 120, the plurality of first snap-fit ​​frames 120 being respectively connected to the first frame 110 and arranged at intervals along a first direction X, each of the first snap-fit ​​frames 120 being provided with at least one snap-fit ​​member 130, the snap-fit ​​member 130 including an elastic protrusion 132 protruding toward the interior of the corresponding first snap-fit ​​frame 120; and a second assembly assembly 200, the second assembly assembly 200 including a second frame 210 and a plurality of second snap-fit ​​frames 220, the plurality of second snap-fit ​​frames 220 being respectively connected to the second frame 210 and being arranged one-to-one with the plurality of first snap-fit ​​frames 120, each of the second snap-fit ​​frames 220 being provided with at least one snap-fit ​​groove 221, the elastic protrusion 132 being able to be embedded in the snap-fit ​​groove 221.

[0024] In this embodiment, for ease of description, the length direction of the snap-on bag filter frame is defined as the first direction X, the width direction of the snap-on bag filter frame is defined as the second direction Y, and the thickness direction of the snap-on bag filter frame is defined as the third direction Z. The first direction X, the second direction Y, and the third direction Z are arranged perpendicularly to each other, and the first direction X and the second direction Y are located in the same plane.

[0025] Among them, see Figure 2 As shown, the first frame 110 in the first assembly assembly 100 serves as the basic load-bearing structure of the first assembly assembly 100, providing a unified installation benchmark and overall support for multiple first snap-fit ​​frames 120. This ensures that each first snap-fit ​​frame 120 maintains a preset spacing and parallelism during assembly. Simultaneously, it cooperates with the second frame 210 to form the outer perimeter of the frame, ensuring the overall rigidity of the assembly frame. The first frame 110 can be formed in one piece using injection molding, avoiding dimensional errors caused by traditional discrete frame splicing and improving the overall structural stability of the frame. It is fixedly connected to the multiple first snap-fit ​​frames 120.

[0026] Further, in this embodiment, the first frame 110 includes a first side frame 112 and a plurality of first connecting beams 113. A plurality of first snap-fit ​​frames 120 are respectively connected to the plurality of first connecting beams 113. The plurality of first connecting beams 113 are evenly spaced along the first direction X, and any one of the first connecting beams 113 extends along the second direction Y. Based on this, in this embodiment, the plurality of first snap-fit ​​frames 120 are arranged at intervals along the first direction X. Any one of the first snap-fit ​​frames 120 is used to cooperate with the second snap-fit ​​frame 220 to clamp and fix the edges of the plurality of air inlets of the filter bag. Specifically, in this embodiment, six first snap-fit ​​frames 120 are spaced apart along the first direction X. Each of the first snap-fit ​​frames 120 is provided with a mounting groove 121 for the snap-fit ​​member 130 to be fixedly connected.

[0027] See Figure 3 As shown, in this embodiment, the mounting groove 121 is disposed on two opposite sides of the first snap-fit ​​frame 120 in the first direction X. Correspondingly, a plurality of snap-fit ​​members 130 are provided on one of the first snap-fit ​​frames 120. The plurality of snap-fit ​​members 130 are arranged around the edge of the first snap-fit ​​frame 120 and are embedded and connected to the mounting groove 121 one by one. Specifically, the snap-fit ​​member 130 in this embodiment also includes a connecting arm 131, which is embedded and connected to the mounting groove 121, and the elastic protrusion 132 is connected to the end of the connecting arm 131. In different embodiments, the number and arrangement position of the mounting groove 121 and the snap-fit ​​member 130 can be adaptively adjusted according to actual usage requirements, and this utility model does not impose specific limitations in this regard.

[0028] In this embodiment, the elastic protrusion 132 includes a guide slope and a snap-fit ​​surface. The snap-fit ​​surface is perpendicular to the side wall of the first frame 110 and extends toward the interior of the first frame 110. In the snap-fit ​​movement direction of the first frame 110, the guide slope gradually extends from the snap-fit ​​surface toward the side wall of the first frame 110. During the snap-fit ​​process, the guide slope guides the assembly process. When the first snap-fit ​​frame 120 and the second snap-fit ​​frame 220 are engaged, the guide slope will first contact the edge of the second snap-fit ​​frame 220 or the entrance of the snap-fit ​​groove 221. By tilting the angle, the thrust applied during assembly in the Z direction is converted into a lateral force that deforms the elastic protrusion 132 toward the side wall of the first frame 110, thereby causing the elastic protrusion 132 to automatically retract and avoid the obstruction, completing the embedding action without manual pressing, and achieving unobstructed docking. When the elastic protrusion 132 is inserted into the locking groove 221 of the second locking frame 220, the locking surface and the inner wall of the locking groove 221 form a surface contact abutment, using the vertical force balance to prevent the first and second assembly components 200 from separating when moving in opposite directions. Because it is perpendicular to the side wall of the first frame 110, it can directly bear the airflow impact force or the tensile force generated by the frame vibration of the filter bag, ensuring that the locking structure does not loosen during long-term use. Based on the above structural design, the first assembly component 100 and the second assembly component 200 in this application can achieve unidirectional locking and reverse anti-detachment mechanical characteristics, and the locking can be completed without precise alignment, which is especially suitable for mass production or rapid on-site installation scenarios.

[0029] See Figures 3 to 6 As shown, in this embodiment, the first frame 110 is provided with at least one positioning plate 111, and the second frame 210 is provided with at least one positioning groove 213. The positioning plate 111 can be inserted into the positioning groove 213. The positioning groove 213 constrains both sides of the positioning plate 111 in the thickness direction, preventing the first frame 110 and the second frame 210 from being misaligned during assembly.

[0030] Further, see Figure 4 As shown, in this embodiment, the second frame 210 includes a second side frame 211 and multiple second connecting beams 212. Multiple second snap-fit ​​frames 220 are respectively connected to the multiple second connecting beams 212. Each second snap-fit ​​frame 220 has multiple snap-fit ​​slots 221, and each of the multiple snap-fit ​​slots 221 corresponds one-to-one with a multiple snap-fit ​​component 130. In different embodiments, the slot openings of the snap-fit ​​slots 221 can be guided, thereby eliminating the need for precise alignment and improving assembly efficiency.

[0031] In this embodiment, the second assembly component 200 further includes a plurality of support components 230, see [link to documentation]. Figure 5As shown, multiple support components 230 are respectively disposed between two adjacent second snap-fit ​​frames 220 and are configured corresponding to the positioning grooves 213. Each support component 230 includes two abutment plates 231 and at least one support column 232. The two ends of the support column 232 are respectively connected to the two abutment plates 231, and the two abutment plates 231 abut against the snap-fit ​​grooves 221 of the two adjacent second snap-fit ​​frames 220. The support column 232, as the core force-bearing component of the support component 230, is connected to the two abutment plates 231 at both ends, forming axial support between two adjacent second frames 210. This converts the radial force on the frame into an axial force along the axis of the support column 232, preventing the second frame 210 from bending or deforming due to uneven force distribution. The abutment plate 231 is perpendicularly connected to the support column 232, and its contact surface is slightly larger than the snap-fit ​​groove 221 of the second frame 210. As a force transmission medium, it evenly distributes the supporting force of the support column 232 to the snap-fit ​​groove 221 area of ​​the second frame 210. Since the snap-fit ​​groove 221 is a key part for snapping with the first assembly component 100, the abutment of the abutment plate 231 can strengthen the structural strength of this area, preventing the snap-fit ​​groove 221 from cracking or deforming due to long-term stress. Based on the structural design of the support component 230, adjacent second frames 210 can form a continuous rigid whole, rather than independent and dispersed units. This avoids overall frame deformation, ensuring long-term stable fit between the snap-fit ​​component 130 and the snap-fit ​​groove 221. Furthermore, it disperses the filter bag tension, preventing snap-fit ​​failure due to overload in a single frame and extending the service life of the overall structure.

[0032] See Figure 7 As shown, the snap-fit ​​bag filter frame also includes sound-absorbing cotton 300, which is filled between the first frame 110 and the second frame 210. Specifically, the sound-absorbing cotton 300 is preferably high-density polyester fiber or open-cell foam to provide good elasticity and sound absorption performance. During the filtration process, the high-speed airflow through the filter bag generates turbulent noise due to changes in flow velocity. Simultaneously, filter bag vibration and slight deformation of the frame also generate mechanical noise. The sound-absorbing cotton 300 absorbs air vibration energy through its internal porous structure, making it particularly suitable for places with high noise requirements, such as hospitals and offices. Example 2

[0033] This embodiment provides a bag filter, which includes the above-mentioned snap-fit ​​bag filter frame and filter bag, wherein the air inlet edge of the filter bag is clamped and fixed between a plurality of first snap-fit ​​frames 120 and a plurality of second snap-fit ​​frames 220.

[0034] In summary, the snap-fit ​​bag filter frame and bag filter of this utility model, through the high-precision fit between the first assembly component 100 and the second assembly component 200, achieve rapid clamping and non-destructive assembly of the filter bag. No additional tools are required throughout the operation, significantly improving the replacement efficiency of a single filter bag. Both the first assembly component 100 and the second assembly component 200 adopt an integrated structure, completely eliminating the need to assemble discrete components such as frame bars, pressure rods, and pressure plates in traditional designs. This not only reduces the number of parts but also lowers noise caused by structural vibration due to insufficient rigidity at connection points, while eliminating assembly errors caused by tolerances in the fit of multiple parts. This integrated design, while ensuring support strength and reliable filter bag fixation, significantly reduces mold development costs and production time, truly achieving multiple optimizations in structure simplification, cost reduction, and ease of use. It is particularly suitable for scenarios with high requirements for maintenance efficiency and filtration stability, such as air conditioning systems and cleanrooms.

[0035] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A snap-on bag filter frame, characterized in that: include: The first assembly component includes a first frame and a plurality of first snap-fit ​​frames. The plurality of first snap-fit ​​frames are respectively connected to the first frame and are arranged at intervals along a first direction. Each first snap-fit ​​frame is provided with at least one snap-fit ​​member. The snap-fit ​​member includes an elastic protrusion that protrudes toward the interior of the corresponding first snap-fit ​​frame. The second assembly component includes a second frame and a plurality of second snap-fit ​​frames. The plurality of second snap-fit ​​frames are respectively connected to the second frame and are arranged in a one-to-one correspondence with the plurality of first snap-fit ​​frames. Each second snap-fit ​​frame is provided with at least one snap-fit ​​groove, and the elastic protrusion can be embedded in the snap-fit ​​groove.

2. The snap-on bag filter frame according to claim 1, characterized in that: A first snap-fit ​​frame is provided with a plurality of snap-fit ​​components, which are arranged around the edge of the first snap-fit ​​frame. A second snap-fit ​​frame is provided with a plurality of snap-fit ​​slots, which are arranged one-to-one with the plurality of snap-fit ​​components.

3. The snap-on bag filter frame according to claim 1, characterized in that: The first snap-fit ​​frame is provided with a mounting groove, and the snap-fit ​​component also includes a connecting arm, which is embedded in the mounting groove, and the elastic protrusion is connected to the end of the connecting arm.

4. The snap-on bag filter frame according to claim 1, characterized in that: The elastic protrusion includes a guide slope and a snap-fit ​​surface. The snap-fit ​​surface is disposed perpendicular to the side wall of the first frame and extends toward the interior of the first frame. In the snap-fit ​​movement direction of the first frame, the guide slope gradually extends obliquely toward the side wall of the first frame from the snap-fit ​​surface.

5. The snap-on bag filter frame according to claim 1, characterized in that: The first frame is provided with at least one positioning plate, and the second frame is provided with at least one positioning groove, wherein the positioning plate can be inserted into the positioning groove.

6. The snap-on bag filter frame according to claim 5, characterized in that: The second assembly assembly further includes multiple support components, which are respectively disposed between two adjacent second snap-fit ​​frames and are configured corresponding to the positioning slots.

7. The snap-on bag filter frame according to claim 6, characterized in that: The support assembly includes two abutment plates and at least one support column. The two ends of the support column are respectively connected to the two abutment plates, and the two abutment plates abut against the snap-fit ​​grooves of two adjacent second snap-fit ​​frames.

8. The snap-on bag filter frame according to claim 1, characterized in that: The snap-on bag filter frame also includes sound insulation cotton, which is filled between the first frame and the second frame.

9. The snap-on bag filter frame according to claim 1, characterized in that: The first frame includes a first side frame and a plurality of first connecting beams, with the plurality of first snap-fit ​​frames respectively connected to the plurality of first connecting beams; the second frame includes a second side frame and a plurality of second connecting beams, with the plurality of second snap-fit ​​frames respectively connected to the plurality of second connecting beams.

10. A bag filter, characterized in that: Includes the snap-on bag filter frame and filter bag as described in any one of claims 1 to 9, wherein the air inlet edge of the filter bag is clamped and fixed between a plurality of first snap-fit ​​frames and a plurality of second snap-fit ​​frames.

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