Filter element of air filter

Abstract

A filter element of an air filter comprises a tubular shell with openings in the upper end and the lower end, a corresponding frame body is arranged at the upper end of the shell, the upper end face of the shell is fixedly connected to the lower surface of the frame body, the shell and the frame body are integrally formed, a corresponding medium bag is arranged in the shell, and a first sealing ring and a second sealing ring are correspondingly arranged at the upper end and the lower end of the shell respectively. Wherein the first sealing ring is located at the upper end of the outer side wall of the shell, the second sealing ring is located at an opening in the lower end of the shell, and all the parts coaxially correspond to one another. The sealing device is better in sealing performance and stability, simpler in structure and easier to manufacture and process.

Description

TECHNICAL FIELD

[0001] The utility model belongs to filter technical field, especially relate to a direct current type air filter element structure of clamping seal. BACKGROUND

[0002] Air filter is a device for filtering air, which mainly filters dust and sand in air and is widely used in air filtering of engineering locomotive, automobile, agricultural locomotive, laboratory, sterile operation room and various precision operation rooms. The direct current type air filter element is commonly used in air filter, which is clamped and sealed (or axial sealed) and mainly composed of medium package, shell, frame member and sealing member. The existing manufacturing process mainly includes: firstly, the medium package 3 is placed in the shell and the bottom end is abutted on the corresponding position of the bottom of the shell; then, the frame member is placed on the upper end of the medium package and the bottom surface is abutted on the corresponding position of the top of the medium package, at this time, the gap is left between the frame member and the shell; then, the corresponding sealing member is formed by foaming polyurethane material at the corresponding position. During the forming process, the polyurethane material is filled into the gap between the frame member, the medium package 3 and the shell and bonds the three together to form the integral sealing member structure. The above technical solution has high positioning matching degree requirement between the frame member, the medium package and the shell, improves the complexity of the frame member and the shell structure design, improves the process requirement of the sealing member forming, thereby greatly increases the processing cost of the direct current type air filter element and seriously reduces the economic benefit of the production. Meanwhile, the structure filter element only has the sealing member matched with the air filter shell at the air inlet end and is tightly sealed by the air filter front cover. However, the air filter works in the vibrating environment for a long time, the long-term vibration reduces the clamping ability of the front cover, thereby the filter element shakes in the air filter shell. Thus, the loosening of the front cover and the shaking of the filter element may cause the loosening of the axial sealing joint surface, thereby causing the sealing failure and the bypass of the air filter losing the filtering effect. CONTENT

[0003] The utility model aims at providing a direct current type air filter element structure of clamping seal which has simpler structure and better sealing performance, so as to solve the technical problems of the existing direct current type air filter element structure of clamping seal, such as complexity, high manufacturing process requirement, high production cost and easy influence of sealing performance in long-term vibrating environment.

[0004] In order to achieve the above-mentioned purpose, the specific technical scheme of the utility model is as follows:

[0005] An air filter cartridge comprises a tubular shell with open upper and lower ends, a corresponding frame body is arranged at the upper end of the shell, and the upper end surface of the frame body is fixedly connected to the lower surface of the frame body, and the two are integrally formed. A corresponding medium package is arranged in the shell, and a corresponding first sealing ring and a second sealing ring are arranged at the upper and lower ends of the shell respectively, wherein the first sealing ring is located on the upper end of the outer side wall of the shell, and the second sealing ring is located at the lower end opening of the shell. The above components are coaxially corresponding.

[0006] Further, the frame body comprises a frame body, a handle is arranged above the frame body, the bottom end of the handle is fixedly connected to the top surface of the frame body, a fixedly connected connecting ring and a positioning block are arranged on the outer circle of the frame body, wherein the inner circle of the connecting ring is connected to the bottom end of the outer side wall of the frame body, the first sealing ring is correspondingly sleeved on the periphery of the connecting ring, a plurality of positioning blocks are arranged on the outer side wall of the frame body in the circumferential direction, a protruding portion corresponding to the positioning block is arranged on the air filter housing, and the two cooperate to provide positioning for the installation of the filter cartridge. The top surface of the shell is correspondingly connected to the bottom surface of the frame body, and the top surface of the frame body extends inwardly to form a ring protrusion for positioning the medium package.

[0007] Further, the positioning block comprises a horizontal plate corresponding to the upper part of the outer side wall of the frame body, a vertical plate corresponding to the bottom surface of the outer side wall of the frame body is arranged below the bottom surface of the horizontal plate, the bottom surface of the vertical plate extends outwardly to form a bottom protrusion corresponding to the frame body, the connecting ring is disconnected at a position corresponding to the positioning block, the bottom protrusion corresponds to the connecting ring, and the bottom surfaces of the two are in the same plane.

[0008] Further, the first sealing ring comprises a first sealing wall arranged above the connecting ring and a second sealing wall arranged below the connecting ring, wherein the inner circle of the first sealing wall abuts against the outer side wall of the frame body, the lower surface of the first sealing wall is fitted with the upper surface of the connecting ring, the fitted parts of the first sealing ring and the frame body are fixedly bonded, the inner circle of the second sealing wall abuts against the outer side wall of the corresponding mounting groove of the air filter housing, the outer circles of the first sealing wall and the second sealing wall protrude from the connecting ring, and the protruding parts extend towards each other and are fixedly connected together.

[0009] Further, the part corresponding to the positioning block of the first sealing ring is wrapped along the bottom end track, the upper and lower surfaces of the first sealing wall and the second sealing wall are correspondingly fitted with each other, and a sealing effect is formed between the filter cartridge, the air filter front cover and the air filter housing.

[0010] Further, the outer circle of the connecting ring is provided with flow-through grooves penetrating from the top surface to the bottom surface thereof, and a plurality of flow-through grooves are uniformly distributed on the outer side wall of the connecting ring in the circumferential direction.

[0011] Further, the medium package is filled with direct flow filtering medium, which comprises a first corrugated filter material and a second corrugated filter material which are attached to each other, the corrugations of the two are perpendicular to each other, the second corrugated filter material is divided into high waves and low waves according to the height of wave top, the wave top of the low wave is lower than that of the high wave, and the high wave and the low wave are staggered along the extending direction of the corrugation, and each of them is not less than one.

[0012] Further, the inner side wall of the lower end of the shell is a slanting ring surface which is gradually inclined outward from top to bottom, a colloid containing part with a triangular cross section is formed between the ring surface and the outer side surface of the bottom end of the medium package, the second sealing ring 5 comprises an inner side sealing body which is located at the inner side, the colloid containing part is used for containing the inner side sealing body of the second sealing ring, the bottom end of the inner side sealing body is lower than the bottom surface of the shell, the bottom end of the inner side sealing body extends to the radial sealing band which is in interference fit with the shell and the air filter shell from the outer ring of the shell and in the upward direction, and the bottom end of the outer side wall of the second sealing ring is a guide inclined surface which is gradually inclined inward from top to bottom.

[0013] The air filter filter core structure is simple, the components are easy to process and manufacture, the manufacturing cost is lower, the sealing performance is better compared with common filter cores on the market, the filter core is not easy to loosen under long-term vibration, the stability is higher, the effective filtering area is larger, the pollution capacity is stronger, the service life is longer, and the filter core is also easy to carry, assemble and disassemble, and maintain. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is an external structure schematic view of the utility model;

[0015] Figure 2 It is an explosion view of the utility model structure;

[0016] Figure 3 It is a short edge direction sectional view of the utility model;

[0017] Figure 4 It is a long edge direction sectional view of the utility model when being installed and used; Figure 3 It is a sectional enlarged view of A in the utility model;

[0018] Figure 5 It is a long edge direction sectional view of the utility model when being installed and used;

[0019] Figure 6 It is a sectional enlarged view of B in the utility model; Figure 5

[0020] Figure 7 It is a sectional enlarged view of C in the utility model; Figure 5

[0021] It is a structure schematic view of the filtering medium of the utility model; Figure 8 ​​

[0022] Marked description: 1, frame body; 11, frame body; 12, handle; 13, connecting ring; 14, positioning block; 15, ring convex; 16, flow channel; 2, shell; 21, ring surface; 22, gel containing part; 3, medium package; 31, first corrugated filter material; 32, second corrugated filter material; 4, first sealing ring; 41, first sealing wall; 42, second sealing wall; 5, second sealing ring; 51, radial sealing band; 52, inner sealing body; 6, air filter shell; 61, air filter front cover; 62, protruding part. DETAILED DESCRIPTION

[0023] In order to better understand the purpose, structure and function of the utility model, the utility model air filter cartridge is described in further detail below in conjunction with the drawings.

[0024] As Figures 1-8 shown, the utility model air filter cartridge comprises corresponding frame body 1, shell 2 and medium package 3, wherein the shell 2 is the pipe type with upper and lower ends open, it is arranged below the frame body 1, its upper end is the air inlet end of the filter core, the upper end surface of the shell 2 is connected on the lower surface of the frame body 1, and the two are integrally formed, fixedly connected, the medium package 3 is arranged in the shell 2, corresponding first sealing ring 4 and second sealing ring 5 are arranged at the upper and lower ends of the shell 2 respectively, wherein the first sealing ring 4 is located at the upper end of the outer side wall of the shell 2, when using, it is between the filter core and the air filter shell 6 and the air filter front cover 61, and it provides sealing effect for the corresponding installation among the three, the second sealing ring 5 is at the lower end opening of the shell 2, its upper end is V-shaped, when using, its upper end fills the gap between the shell 2 and the medium package 3 and the gap between the shell 2 and the air filter shell 6, and provides sealing effect for the bottom connection of the filter core and the filter, the above components are coaxially corresponding, and in the embodiment, they are all arranged as common racetracks.

[0025] The frame body 1 comprises a frame body 11, a handle 12 is arranged above the frame body 11, the bottom end of the handle 12 is fixedly connected to the top surface of the frame body 11, and the handle 12 is integrally formed with the frame body 11 and is fixedly connected, which is convenient for gripping and further facilitates the installation, removal, transportation and maintenance of the filter element. The outer ring of the frame body 11 is provided with a connecting ring 13 and a positioning block 14. The inner ring of the connecting ring 13 is fixedly connected to the bottom end of the outer side wall of the frame body 11. The first sealing ring 4 is sleeved on the outer periphery of the connecting ring 13, and the inner ring of the first sealing ring 4 is connected to the outer ring of the connecting ring 13. In use, the outer periphery of the first sealing ring 4 is connected with the air filter shell 6 and the air filter front cover 61. The positioning block 14 is arranged on the outer side wall of the frame body 11. The air filter shell 6 is provided with a protruding portion 62 corresponding to the positioning block 14. The positioning block 14 and the protruding portion 62 cooperate with each other to provide axial positioning for the installation of the filter element and the air filter shell 6. In the embodiment, a pair of corresponding positioning blocks 14 are arranged on the outer side wall of the frame body 11. The two positioning blocks 14 are mirror images corresponding to the axis of the frame body 11. The positioning blocks 14 comprise a horizontal plate, a vertical plate and a bottom protrusion. The inner side end of the horizontal plate is connected to the upper part of the outer side wall of the frame body 11. The vertical plate is arranged on the outer side end of the horizontal plate, and the top surface of the vertical plate is connected to the bottom surface of the horizontal plate. The bottom surface of the vertical plate extends outward to correspond to the outer side of the frame body 11 to form the bottom protrusion. The connecting ring 13 is disconnected at the position corresponding to the positioning block 14. The bottom protrusion corresponds to the connecting ring 13, and the bottom surfaces of the bottom protrusion and the connecting ring 13 are in the same plane. The bottom end of the frame body 11 corresponds to the shell 2, and the top surface of the shell 2 is fixedly connected to the bottom surface of the frame body 11. The frame body 11 and the shell 2 are integrally formed. The top surface of the frame body 11 extends inward to form a ring protrusion 15, which is used for positioning when the medium bag 3 and the shell 2 and the frame body 1 are correspondingly installed. The medium bag 3 enters the inner cavity of the shell 2 from the lower end opening of the shell 2 and then abuts against the bottom surface of the ring protrusion 15 of the frame body 1.

[0026] The outer ring of the connecting ring 13 is provided with a flow channel 16. The flow channel 16 is a through groove extending from the top surface to the bottom surface of the connecting ring 13. A plurality of flow channels 16 are uniformly distributed on the outer side wall of the connecting ring 13 along the circumferential direction. The flow channels 16 facilitate the smooth flow of polyurethane material upward and downward, and further form a complete first sealing ring 4 by foaming.

[0027] The first sealing ring 4 comprises a first sealing wall 41 arranged above the connecting ring 13 and a second sealing wall 42 arranged below the connecting ring 13, wherein the inner circle of the first sealing wall 41 abuts against the outer side wall of the frame body 1, the lower surface of the first sealing wall 41 is in abutment with the upper surface of the connecting ring 13, the part of the first sealing ring 4 in abutment with the frame body 1 is fixedly bonded, the inner circle of the second sealing wall 42 abuts against the outer side wall of the corresponding mounting groove of the air filter shell 6, the outer circles of the first sealing wall 41 and the second sealing wall 42 both protrude from the connecting ring 13, and the protruding parts extend towards each other and are fixedly connected together, thereby forming the integral first sealing ring 4, the surfaces of the first sealing wall 41 and the second sealing wall 42 are free from concave-convex undulations in the circumferential direction, so that the structure of the first sealing ring 4 is simpler and the manufacturing is more convenient, in use, the upper end of the first sealing wall 41 is in abutment with the air filter front cover 61 and is pressed against each other, thereby forming the axial sealing between them, the lower end of the second sealing wall 42 is in abutment with the bottom surface of the corresponding mounting groove of the air filter shell 6 and is pressed against each other, thereby forming the axial sealing between them, the part of the first sealing ring 4 corresponding to the positioning block 14 is wrapped around the bottom end of the positioning block 14, the first sealing wall 41 and the second sealing wall 42 are in abutment with the upper and lower surfaces of the bottom protrusion respectively, and the sealing effect is formed between the filter element and the air filter front cover 61 and the air filter shell 6.

[0028] The medium package 3 is filled with straight-flow filter medium, which comprises first corrugated filter material 31 and second corrugated filter material 32, the corresponding surfaces of which are in abutment with each other, the first corrugated filter material 31 can be selected in various forms, such as flat filter material and corrugated filter material, etc., in this embodiment, corrugated filter material is used, the corrugations of the two are perpendicular to each other and cross-distributed, the second corrugated filter material 32 is divided into high corrugation and low corrugation according to the height of the wave top, wherein the wave top of the low corrugation is lower than that of the high corrugation, the two are staggered arranged along the extending direction of the corrugation, and there are not less than one, such arrangement improves the effective filtering area and pollution capacity of the medium package 3.

[0029] The inner side wall of the lower end of the shell 2 is provided with a slanting ring surface 21 which is inclined outward from top to bottom. The space between the ring surface 21 and the outer side surface of the bottom end of the medium package 3 is triangular in cross section, which is a colloid containing part 22. The colloid containing part 22 facilitates the inflow of polyurethane material into the gap between the shell 2 and the medium package 3, and then foaming to form the inner sealing body 52 of the second sealing ring 5, so as to form a firm seal between the medium package 3 and the shell 2, and avoid the inflow of unfiltered air from the medium package 3 and the shell 2 to the downstream. The bottom end of the inner sealing body 52 of the second sealing ring 5 is lower than the bottom surface of the shell, and extends to the outer ring of the shell 2 and upward to the gap between the shell 2 and the air filter housing 6, forming a radial sealing band 51 which is in interference fit with the two, which helps to prevent the inflow of unfiltered air to the downstream due to the axial seal failure of the air inlet end of the filter element, and at the same time, the radial sealing band 51 enhances the stability of the filter element in the air filter housing 6, so that it is not easy to shake. The bottom end of the outer side wall of the second sealing ring 5 is provided with a guide inclined surface which is inclined inward from top to bottom, which makes it easier to install the filter element into the air filter housing.

[0030] In use, the first sealing ring 4 and the second sealing ring 5 can be formed by foaming polyurethane material in a mold tool outside the corresponding position of the filter element, or using a pre-set independent component and then bonding it to the corresponding position of the filter element by glue. In this embodiment, both the first sealing ring 4 and the second sealing ring 5 are formed by foaming polyurethane material. The frame body 1 is the air inlet end of the filter element, which is installed corresponding to the front cover end of the air filter. The other end of the frame body 2 is the air outlet end of the filter element. The air to be purified enters the filter element from the air inlet end, and then flows to the air outlet end along the extending direction of the corrugated wave of the second corrugated filter material 32. In this process, the medium package 3 filters the impurities in the air, and the filtered air flows out of the air outlet end of the filter element, thereby completing the purification of the air.

[0031] The utility model discloses an air filter filter core improves the convenience of filter core assembly and maintenance, transportation through the setting of handle 12, through the integrated molding of frame body 1 and shell 2, make the seal between shell 2 and medium package 3 only at the air outlet end of filter core, and this technical scheme process is simpler, and the structure of each component of the utility model is also simpler, thereby reducing the manufacturing cost of filter core as a whole, through the double -sealed structure of first sealing washer 4 and second sealing washer 5, improved the sealing reliability of filter core, simultaneously, second sealing washer 5 further plays the limiting effect of filter core in radial direction, reduce the probability of filter core in air filter shell 6 and sway, and further reduce the possibility of filter core and air filter shell 6 because of filter core loosening and cause sealing failure, and the mutual cooperation of both, make filter core in air filter shell 2 even in long -term vibration state under not easy loosening, improve the overall stability of filter core in air filter shell 2, further, the effective filtration area of the inner filter medium of medium package 3 of the utility model is larger, and the dirt capacity is stronger, and its service life is longer.

[0032] It can be understood that the utility model is described through some embodiments, and the person skilled in the art knows that various changes or equivalent replacements can be made to these features and embodiments without departing from the spirit and scope of the utility model. In addition, under the guidance of the utility model, these features and embodiments can be modified to adapt to specific conditions and materials without departing from the spirit and scope of the utility model. Therefore, the utility model is not limited by the specific embodiments disclosed here, and all embodiments falling within the scope of the claims of the present application belong to the scope protected by the utility model.

Claims

1. An air filter cartridge, characterized by, It includes the pipe type shell (2) that upper and lower ends are open, the upper end of shell (2) is equipped with corresponding frame body (1), its upper end surface is fixedly connected on the lower surface of frame body (1), and the two are integrally formed, the shell (2) is equipped with corresponding medium bag (3), the upper and lower ends of shell (2) are respectively equipped with corresponding first sealing ring (4) and second sealing ring (5), wherein the first sealing ring (4) is located on the outer side wall of shell (2) upper end, and the second sealing ring (5) is at the lower end opening of shell (2), the above components are coaxial corresponding.

2. The air filter cartridge of claim 1 wherein, The frame body (1) includes the frame body (11), the upper of frame body (11) is equipped with handle (12), the bottom end of handle (12) is fixedly connected on the top surface of frame body (11), the outer circle of frame body (11) is equipped with fixedly connected connecting ring (13) and positioning block (14), wherein the inner circle of connecting ring (13) is connected on the bottom end of the outer side wall of frame body (11), the first sealing ring (4) is correspondingly sleeved on the outer periphery of connecting ring (13), a plurality of positioning blocks (14) are arranged on the outer side wall of frame body (11) along the circumference, the air filter shell (6) is equipped with protruding part (62) corresponding to the positioning block (14), and the two are matched to provide positioning effect for the installation of filter core, the top surface of shell (2) is correspondingly connected on the bottom surface of frame body (11), and the top surface of frame body (11) extends inward to form ring convex (15) for installing and positioning medium bag (3).

3. The air filter cartridge of claim 2 wherein, The positioning block (14) includes the horizontal plate, the horizontal plate is correspondingly connected on the upper part of the outer side wall of frame body (11), the bottom surface of the outer side end of horizontal plate is equipped with corresponding vertical plate, the bottom surface of vertical plate extends to the corresponding outer side of frame body (11) to form bottom convex, the connecting ring (13) is disconnected at the corresponding position of positioning block (14), the bottom convex corresponds to the connecting ring (13), and the bottom surfaces of the two are in the same plane.

4. The air filter cartridge of claim 3 wherein, The first sealing ring (4) includes the first sealing wall (41) arranged above the connecting ring (13) and the second sealing wall (42) arranged below the connecting ring (13), wherein the inner circle of the first sealing wall (41) abuts on the outer side wall of the frame body (1), the lower surface thereof is fitted with the upper surface of the connecting ring (13), the parts of the first sealing ring (4) and the frame body (1) fitted together are fixedly bonded, the inner circle of the second sealing wall (42) abuts on the outer side wall of the corresponding installation groove inner circle of the air filter shell (6), the outer circles of the first sealing wall (41) and the second sealing wall (42) all protrude from the connecting ring (13), and the protruding parts all extend to each other and are fixedly connected together.

5. The air filter cartridge of claim 4 wherein, The part corresponding to the first sealing ring (4) and the positioning block (14) is wrapped along the bottom end track thereof, the upper and lower surfaces of the first sealing wall (41) and the second sealing wall (42) are correspondingly fitted with each other, and a sealing effect is formed between the filter core and the air filter front cover (61) and the air filter shell (6).

6. The air filter cartridge of claim 2 wherein, The outer circle of the connecting ring (13) is equipped with flow-through grooves (16) penetrating from the top surface to the bottom surface thereof, and a plurality of flow-through grooves (16) are uniformly distributed on the outer side wall of the connecting ring (13) along the circumference thereof.

7. The air filter cartridge of claim 1 wherein, The medium package (3) is filled with direct flow filtering medium, which comprises a first corrugated filter material (31) and a second corrugated filter material (32) adhered to each other, the corrugations of the two are distributed perpendicularly to each other, the second corrugated filter material (32) is divided into high waves and low waves according to the height of wave tops, the wave top of the low wave is lower than that of the high wave, the high wave and the low wave are staggered along the extending direction of the corrugation, and each of them is not less than one.

8. The air filter cartridge of claim 1 wherein, The inner side wall of the lower end of the shell (2) is provided with a slanting annular surface (21) gradually inclined outward from top to bottom, the annular surface (21) and the outer side surface of the bottom end of the medium package (3) form a colloid accommodating portion (22) with a triangular cross section, the second sealing ring (5) comprises an inner side sealing body (52) at the inner side, the colloid accommodating portion (22) is used for accommodating the inner side sealing body (52) of the second sealing ring (5), the bottom end of the inner side sealing body (52) of the second sealing ring (5) is lower than the bottom surface of the shell, the bottom end of the inner side sealing body (52) extends to the outer ring of the shell (2) and upward to the space between the shell (2) and the air filter housing (6), forming a radial sealing band (51) in interference fit with the two, and the bottom end of the outer side wall of the second sealing ring (5) is provided with a guide inclined surface gradually inclined inward from top to bottom.

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