A structurally stable filter frame

Abstract

The utility model discloses a structure stable filter frame, including first filter plate, second filter plate and elastic ring, second filter plate and elastic ring install in the same side of first filter plate, and elastic ring surrounds the outer periphery of second filter plate, and elastic ring and second filter plate enclose and form the filter -pressing space of one -sided open, elastic ring is equipped with first mounting portion, and first filter plate is equipped with the second mounting portion of cooperation and connection with first mounting portion, first filter plate and second filter plate are equipped with feed hole respectively, and the feed hole of first filter plate is coaxial with the feed hole of second filter plate and sets up, and the surface of first filter plate is equipped with first filter hole, and the circumferential side of first filter plate is equipped with external connection hole, and the surface of second filter plate is equipped with second filter hole, and first filter hole and second filter hole are communicated with external connection hole through pipeline. Through the cooperation structure of elastic ring and double filter plate, the stable filter -pressing space is formed, and in combination with the detachable mounting portion design, has the advantages of stable structure, convenient maintenance and long service life.

Description

Technical Field

[0001] This utility model relates to the field of plate and frame filter press technology, and in particular to a filter frame with stable structure. Background Technology

[0002] Filter press equipment is a key device in solid-liquid separation processes, widely used in various industrial fields such as mineral processing, food brewing, dye and chemical industries, and environmental sludge treatment. Its basic working principle involves multiple filter frames arranged sequentially to form several closed filter chambers. The slurry to be treated is conveyed through the feed channel under pressure, filling each filter chamber in turn. Subsequently, hydraulic or mechanical mechanisms apply pressure to the filter chambers, causing the liquid to pass through the filter cloth and be discharged, while solid particles are trapped inside the filter chambers and continuously accumulate, eventually forming a filter cake with low moisture content, thus achieving efficient material separation.

[0003] In the current common filter press frame structure, multiple helical springs are usually arranged between the two filter plates as elastic compensation elements to achieve the compressibility and rebound function of the filter chamber during the filtration process. Although this structure can adapt to the compression and rebound requirements of the filter chamber within a certain period, due to the high frequency and periodicity of filtration operations, the springs are under cyclic stress for a long time, making them prone to fatigue damage, leading to elastic failure or breakage. Once the springs are damaged, it will directly affect the sealing performance and filtration effect of the filter chamber. Moreover, since the springs are mostly embedded inside the filter plate assembly, maintenance and replacement are extremely cumbersome, often requiring the entire filter frame to be disassembled, which is not only time-consuming and labor-intensive, but also causes production interruption. Utility Model Content

[0004] In view of the problems raised in the background art, the purpose of this utility model is to provide a filter frame with a stable structure, which has the advantages of improved structural stability, easy maintenance and extended service life.

[0005] To achieve this objective, the present invention adopts the following technical solution: A structurally stable filter frame includes a first filter plate, a second filter plate, and an elastic ring; The second filter plate and the elastic ring are installed on the same side of the first filter plate, and the elastic ring is arranged around the outer periphery of the second filter plate. The elastic ring and the second filter plate together form a single-sided open filtration space. The elastic ring is provided with a first mounting part, and the first filter plate is provided with a second mounting part that cooperates and connects with the first mounting part. The first filter plate and the second filter plate are respectively provided with feed holes. The feed holes of the first filter plate and the second filter plate are coaxially arranged. The surface of the first filter plate is provided with a first filter hole. The periphery of the first filter plate is provided with an external connection hole. The surface of the second filter plate is provided with a second filter hole. The first filter hole and the second filter hole are connected to the external connection hole through a pipeline.

[0006] Preferably, the first mounting part consists of a plurality of protruding posts, which are arranged to protrude along the bottom surface of the elastic ring, and the plurality of protruding posts are arranged circumferentially around the central axis of the elastic ring; The second mounting part consists of several grooves; A plurality of protruding posts are provided in a one-to-one correspondence with a plurality of grooves, and the protruding posts are respectively installed and inserted into the grooves.

[0007] Preferably, the elastic ring comprises an inner ring wall, an outer ring wall, a top ring wall, and a bottom ring wall connected in sequence; The inner ring wall is attached to the outer wall of the second filter plate, and the bottom wall of the ring is attached to one side surface of the first filter plate; The protruding post is provided on the bottom wall of the ring.

[0008] Preferably, the first mounting part is an iron ring, which is fixedly disposed at the bottom of the elastic ring; The second mounting part consists of several magnetic components, which are arranged around the center circumference of the first filter plate. The magnetic components are fixedly connected to the first filter plate, and the iron rings are magnetically attracted to each other by the magnetic components.

[0009] Preferably, the elastic ring comprises an inner ring wall, an outer ring wall, a top ring wall, and a bottom ring wall connected in sequence; The inner ring wall is attached to the outer wall of the second filter plate, and the bottom wall of the ring is attached to one side surface of the first filter plate; The iron ring is located on the side of the elastic ring near the bottom wall of the ring.

[0010] Preferably, the top wall of the ring is provided with an adsorption groove, which is recessed towards the bottom wall of the ring.

[0011] Preferably, the area of ​​the inner ring wall is smaller than the area of ​​the outer ring wall, the bottom end of the inner ring wall is flush with the bottom end of the outer ring wall, the top end of the inner ring wall is connected to the inner side of the ring top wall through an inner side wall, and the inner side wall is inclined from the inside to the outside.

[0012] Preferably, the adsorption groove divides the top wall of the ring into an inner top wall and an outer top wall, the distance between the inner top wall and the bottom wall of the ring is d2, and the distance between the outer top wall and the bottom wall of the ring is d1, where d1 < d2.

[0013] Preferably, the first filter plate is provided with a plurality of first filter holes, and the plurality of first filter holes are respectively located at the lower part of the center of the first filter plate; The second filter plate is provided with a plurality of second filter holes, and the plurality of second filter holes are respectively located at the lower part of the center of the second filter plate.

[0014] Preferably, it also includes a pipe valve assembly; The valve assembly is disposed outside the first filter plate. The feed end of the valve assembly is connected to the external connection hole, and the discharge end of the valve assembly is provided with a drain port and an air inlet. The air inlet is connected to the purging equipment.

[0015] Compared with the prior art, one of the above technical solutions has the following beneficial effects: The combination of the elastic ring and the double filter plate forms a stable filtration space. Combined with the design of the detachable installation part, it effectively solves the sealing failure problem caused by fatigue damage of the elastic element in traditional filter frames. It has the advantages of stable structure, easy maintenance and extended service life. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of one embodiment of the present utility model; Figure 2 This is a structural schematic diagram from another angle of one embodiment of the present invention; Figure 3 This is an exploded view of one embodiment of the present invention; Figure 4 yes Figure 3 The left view; Figure 5 yes Figure 4 Sectional view of AA; Figure 6 This is a front view of another embodiment of the present invention; Figure 7 yes Figure 6 Sectional view of BB; Figure 8 yes Figure 7 Enlarged diagram of point C in the middle.

[0017] The components include: feed hole 01, first filter plate 1, second mounting part 10, groove 11, magnetic component 12, first filter hole 101, external connection hole 102, second filter plate 2, second filter hole 201, elastic ring 3, inner ring wall 31, outer ring wall 32, ring top wall 33, inner ring top wall 331, outer ring top wall 332, ring bottom wall 34, inner side wall 35, first mounting part 30, protrusion 301, iron ring 302, adsorption tank 303, and pipe valve assembly 4. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0019] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," and "third" may explicitly or implicitly include one or more of that feature.

[0021] It should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] The following is in conjunction with the appendix Figures 1 to 8 The technical solution of this utility model will be further illustrated through specific implementation methods.

[0023] A structurally stable filter frame includes a first filter plate 1, a second filter plate 2, and an elastic ring 3; The second filter plate 2 and the elastic ring 3 are installed on the same side of the first filter plate 1, and the elastic ring 3 surrounds the outer periphery of the second filter plate 2. The elastic ring 3 and the second filter plate 2 together form a single-sided open pressure filtration space. The elastic ring 3 is provided with a first mounting part 30, and the first filter plate 1 is provided with a second mounting part 10 that is connected to the first mounting part 30. The first filter plate 1 and the second filter plate 2 are respectively provided with feed holes 01. The feed holes 01 of the first filter plate 1 and the feed holes 01 of the second filter plate 2 are coaxially arranged. The surface of the first filter plate 1 is provided with a first filter hole 101. The periphery of the first filter plate 1 is provided with an external connection hole 102. The surface of the second filter plate 2 is provided with a second filter hole 201. The first filter hole 101 and the second filter hole 201 are connected to the external connection hole 102 through a pipeline.

[0024] The elastic ring 3 refers to an annular component with axial (thickness direction) elasticity and radial elasticity, specifically made of rubber or polyurethane material, which provides the elastic compensation required for the filtration space through its own deformation. The first mounting part 30 refers to the connecting structure provided on the elastic ring 3, used to form a detachable rigid connection with the first filter plate 1. The second mounting part 10 refers to the mating structure provided on the first filter plate 1, which, through mating with the first mounting part 30, ensures the positioning stability of the elastic ring 3. The coaxial feed hole 01 refers to the material channel penetrating the first filter plate 1 and the second filter plate 2, specifically implemented using a through-hole structure to ensure uniform injection of material into the filtration space. The external connection hole 102 refers to the interface provided on the periphery of the first filter plate 1, used to connect external pipelines to form a bidirectional filtration channel.

[0025] To further explain, the elastic ring 3 surrounds the outer periphery of the second filter plate 2, forming a single-sided open filtration space with the second filter plate 2. During filtration, the two filter frames approach each other, and the single-sided open filtration space of one filter frame cooperates with the first filter plate 1 of the adjacent filter frame to form a closed filtration space. Material is sequentially injected into the adjacent filtration spaces through the feed hole 01. When pressure is applied to compress the material, the elastic ring 3 undergoes compression deformation, and its rebound force maintains a stable sealing pressure in the filtration space. By using the elastic ring 3 instead of the spring elements installed inside the filter frame in the prior art, the problem of needing to disassemble the entire filter frame for maintenance after the failure of a single or partial spring is avoided; only the elastic ring 3 surrounding the second filter plate 2 needs to be removed and replaced.

[0026] Furthermore, the mating connection between the first mounting portion 30 of the elastic ring and the second mounting portion 10 of the first filter plate enables the elastic ring 3 and the first filter plate 1 to form a stable connection structure, avoiding sealing failure caused by relative displacement of components. The coaxial feed hole 01 of the first filter plate 1 and the second filter plate 2 guides the material to enter the filtration space evenly along the axial direction; since the first filter plate 1 will cooperate with the open filtration space of the adjacent filter frame to form a sealed filtration space, by setting the first filter hole 101 on the first filter plate 1 and the second filter hole 201 on the second filter plate 2, a bidirectional drainage filtration path can be formed in the filtration space. When the liquid is discharged through the pipeline through the external connection hole, the lateral pressure borne by the elastic ring is dispersed.

[0027] Compared with existing technologies, traditional helical spring structures suffer from multi-point stress concentration defects, while the integral elastic ring distributes the load evenly through continuous annular support. Split springs require individual disassembly and maintenance, while this invention achieves the overall replacement of the elastic ring 3 through the cooperation of mounting parts (first mounting part and second mounting part). The compression of the space between filter plates in traditional filter frames relies on the contraction force of the spring. This invention, by using the elastic ring 3 surrounding the outside of the second filter plate 2, can form a continuous sealing interface on the one hand, and provide the compression space required for filtration on the other hand through the axial elastic deformation capability of the elastic ring 3.

[0028] This invention effectively reduces the risk of fatigue damage to elastic elements, reduces the frequency of maintenance during filter press operations, simplifies the maintenance process by allowing the elastic ring 3 to be replaced as a whole, and avoids downtime losses caused by complete disassembly of the filter frame; the continuous annular sealing structure improves the airtightness of the filter press space; and the installation connection between the elastic ring 3 and the first filter plate 1 through the mounting part improves the overall structural stability of the filter frame.

[0029] Furthermore, the first mounting part 30 consists of a plurality of protruding posts 301, which are arranged to protrude along the bottom surface of the elastic ring 3, and the plurality of protruding posts 301 are arranged circumferentially around the central axis of the elastic ring 3. The second mounting part 10 consists of a plurality of grooves 11; A plurality of protruding posts 301 are provided in a one-to-one correspondence with a plurality of grooves 11, and the protruding posts 301 are respectively installed and inserted into the grooves 11.

[0030] In one specific embodiment, the first mounting part 30 comprises a plurality of protrusions 301, and the second mounting part 10 comprises a plurality of grooves 11 corresponding to the protrusions 301. The protrusions 301 are rigid protrusions spaced apart along the centerline of the elastic ring. This spaced distribution ensures that the connection force between the elastic ring 3 and the first filter plate 1 is uniformly transmitted circumferentially, avoiding localized stress concentration. The grooves 11 are recessed structures complementary in shape to the protrusions 301, with their depth matching the height of the protrusions 301, forming a stable connection interface through mechanical engagement. This one-to-one correspondence ensures that each protrusion 301 is embedded in its corresponding groove 11, achieving precise alignment and reliable fixation.

[0031] Furthermore, the elastic ring 3 includes an inner ring wall 31, an outer ring wall 32, a top ring wall 33, and a bottom ring wall 34 connected in sequence; The inner ring wall 31 is attached to the outer wall of the second filter plate 2, and the bottom ring wall 34 is attached to one side surface of the first filter plate 1; The protruding post 301 is provided on the bottom wall 34 of the ring.

[0032] The inner ring wall 31 refers to the annular wall surface inside the elastic ring 3, whose inner diameter matches the outer diameter of the second filter plate 2, achieving radial positioning of the second filter plate 2 through tight fitting. The outer ring wall 32 refers to the annular wall surface outside the elastic ring 3, whose outer diameter is larger than that of the inner ring wall 31, used to enhance the overall structural strength of the elastic ring 3. The top ring wall 33 refers to the transverse wall surface connecting the top of the inner ring wall 31 and the top of the outer ring wall 32, used to form contact with the surface of the first filter plate 1 of the adjacent filter frame during the filtration process. The bottom ring wall 34 refers to the annular wall surface at the bottom of the elastic ring 3, achieving a stable connection with the first filter plate 1 through planar contact. The protruding post 301 is specifically a columnar protrusion provided on the lower surface of the bottom ring wall 34, which can be a cylindrical structure integrally formed with the bottom ring wall. The planar part of the bottom ring wall 34 is fitted and connected to the planar part of the first filter plate 1, and the protruding post 301 is used to embed into the groove 11 of the first filter plate 1, thereby achieving positioning installation and structural limitation.

[0033] Furthermore, the first mounting part 30 is an iron ring 302, which is fixedly disposed at the bottom of the elastic ring 3; The second mounting part 10 consists of a plurality of magnetic components 12, which are arranged around the center circumference of the first filter plate 1. The magnetic components 12 are fixedly connected to the first filter plate 1, and the iron ring 302 is magnetically attracted to the plurality of magnetic components 12 respectively.

[0034] In another specific embodiment, the first mounting part 30 is an iron ring 302 with the same shape as the elastic ring 3, and the second mounting part 10 is a magnetic component 12. The iron ring 302 refers to a ring structure made of ferromagnetic material, specifically formed by stamping or casting and embedded in the bottom of the elastic ring 3. Its shape is consistent with the contour of the elastic ring to ensure uniform magnetic force distribution. The magnetic component 12 refers to an element with permanent magnet characteristics, specifically a neodymium iron boron magnet or a ferrite magnet, fixed inside the first filter plate 1 by embedding or bonding to avoid protruding structures on the surface of the first filter plate 1.

[0035] Specifically, the contour matching design of the iron ring 302 and the elastic ring 3 ensures that the magnetic attraction force is evenly transmitted along the ring body of the elastic ring 3, avoiding the breakage or deformation of the elastic ring 3 caused by local stress concentration. After the magnetic component 12 is embedded inside the first filter plate 1, its magnetic lines of force penetrate the material of the first filter plate 1 and form a closed loop with the iron ring 302, generating a stable attraction force, so that the elastic ring 3 and the first filter plate 1 can be tightly attached without mechanical connection. When disassembly and maintenance are required, only external force needs to be applied to overcome the magnetic attraction force to separate the elastic ring 3 from the first filter plate 1, without disassembling the entire filter frame structure.

[0036] Furthermore, the elastic ring 3 includes an inner ring wall 31, an outer ring wall 32, a top ring wall 33, and a bottom ring wall 34 connected in sequence; The inner ring wall 31 is attached to the outer wall of the second filter plate 2, and the bottom ring wall 34 is attached to one side surface of the first filter plate 1; The iron ring 302 is located on the side of the elastic ring 3 near the bottom wall 34 of the ring.

[0037] Specifically, when the filter press is running, the inner ring wall 31 and the outer wall of the second filter plate 2 are pressurized to generate friction. The bottom ring wall 34 contacts the surface of the first filter plate 1 to form a sealing surface. When pressure is applied by the pressure system, the iron ring 302 and the magnetic component 12 inside the first filter plate 1 generate a uniformly distributed magnetic attraction force, ensuring that the bottom ring wall 34 always maintains surface contact with the first filter plate 1. The placement of the iron ring 302 close to the bottom ring wall 34 concentrates the magnetic force lines of action in the contact area.

[0038] Furthermore, the top wall 33 of the ring is provided with an adsorption groove 303, which is recessed toward the bottom wall 34 of the ring.

[0039] The adsorption groove 303 refers to the recessed structure formed on the surface of the elastic ring 3. This structure forms a stress buffer area through the recess, and deforms when the elastic ring 3 is compressed to disperse the stress. During the pressure filtration process, the top wall 33 of the ring and the first filter plate 1 of the adjacent filter frame are attached to form a vacuum adsorption zone, and a negative pressure sealing effect is generated at the contact surface between the elastic ring 3 and the first filter plate 1.

[0040] Furthermore, the area of ​​the inner ring wall 31 is smaller than the area of ​​the outer ring wall 32, the bottom end of the inner ring wall 31 is flush with the bottom end of the outer ring wall 32, and the top end of the inner ring wall 31 is connected to the inner side of the ring top wall 33 through an inner side wall 35, which is inclined from the inside to the outside.

[0041] The area of ​​the inner ring wall 31 being smaller than that of the outer ring wall 32 means that the axial height of the inner ring wall 31 is smaller than the corresponding dimension of the outer ring wall 32. The bottom end of the inner ring wall 31 being flush with the bottom end of the outer ring wall 32 means that the bottom ring wall 34 connecting the two is in a horizontal plane, ensuring that the entire bottom ring wall 34 of the elastic ring is completely in contact with the surface of the first filter plate 1. The inner wall 35 sloping from the inside out means that the transition surface connecting the top of the inner ring wall 31 and the inner side of the top ring wall 33 has a sloping structure, thus forming a progressive pressure transmission path.

[0042] Specifically, the inclined inner wall 35 connects the top of the inner ring wall 31 to the ring top wall 33 as a continuous curved surface, guiding the pressure to be evenly distributed along the inclined surface to the outer ring wall 32 when the filter frame is compressed. This structure ensures that during the compression deformation of the elastic ring 3, the outer ring wall 32 preferentially undergoes elastic deformation inward rather than outward, resulting in a gradual distribution of the sealing pressure of the elastic ring 3 from the outside to the inside. This avoids plastic deformation caused by excessive compression in local areas and maintains the stability of the overall structure.

[0043] Furthermore, the adsorption groove 303 divides the top wall of the ring 33 into an inner top wall 331 and an outer top wall 332. The distance between the inner top wall 331 and the bottom wall 34 is d2, and the distance between the outer top wall 332 and the bottom wall 34 is d1, where d1 < d2.

[0044] The inner ring top wall 331 refers to the portion of the ring top wall near the center region of the elastic ring 3, specifically defined by the inner edge of the adsorption groove 303. The outer ring top wall 332 refers to the portion of the ring top wall away from the center region of the elastic ring 3, specifically defined by the outer edge of the adsorption groove 303. The dimensional difference d1 and d2 refers to the fact that the vertical distance between the outer ring top wall and the ring bottom wall is smaller than the vertical distance between the inner ring top wall and the ring bottom wall. d1 < d2 means that during the pressure filtration process, the inner ring top wall 331 will contact the adjacent filter frame first and deform preferentially to establish the initial seal of the pressure filtration space; and due to the presence of the adsorption groove 303 in the ring top wall 33, the portion of the inner ring top wall 331 can deform not only towards the inner wall 35 but also towards the recessed space of the adsorption groove 303 when it deforms. As the pressure of the filter press continues to increase, the outer ring top wall 332 begins to provide support due to its short lever arm structure. In addition, when a portion of the outer ring top wall 332 deforms, it can also deform into the recessed space of the adsorption tank 303, thus limiting the lateral (radial) deformation of the elastic ring 3 as a whole.

[0045] To further explain, the height difference between the inner ring top wall 331 and the outer ring top wall 332 allows the elastic ring 3 to form a double-layer sealing surface during compression, thereby improving sealing reliability.

[0046] Furthermore, the first filter plate 1 is provided with a plurality of first filter holes 101, and the plurality of first filter holes 101 are respectively located at the lower part of the center of the first filter plate 1; The second filter plate 2 is provided with a plurality of second filter holes 201, and the plurality of second filter holes 201 are respectively located at the lower part of the center of the second filter plate 2.

[0047] After the slurry enters the filter press space, it fills the space from bottom to top. By setting the filter holes (first filter hole 101 and second filter hole 201) at the lower center of the filter plates (first filter plate 1 and second filter plate 2), the liquid can be quickly discharged through the filter holes under the action of gravity. In addition, the second filter hole 201 of the second filter plate 2 is distributed correspondingly to the first filter hole 101 of the first filter plate 1, so that the filtrate is discharged from the same area on both sides of the filter plates, avoiding uneven pressure distribution inside the filter cake due to the dispersed position of the filter holes.

[0048] Furthermore, it also includes valve assembly 4; The valve assembly 4 is disposed outside the first filter plate 1. The feed end of the valve assembly 4 is connected to the external connection hole 102. The discharge end of the valve assembly 4 is provided with a drain port and an air inlet. The air inlet is connected to the purging equipment.

[0049] Valve assembly 4 refers to a modular external device used to control the direction of fluid flow, which can be operated and maintained independently through external installation. The drain port is the outlet for discharging filtered liquid, and the air inlet is the interface for connecting to an external air source. This can be achieved using a quick-connect coupling to a high-pressure air hose for easy connection to purging equipment. The purging equipment is an external power source that provides high-pressure gas, which can be an air compressor or blower, using reverse airflow to remove filter cake residue.

[0050] Specifically, the valve assembly 4 is connected to the external connection port 102 via the feed end, allowing centralized control of the filtrate or gas through external pipelines. During the filtration stage, the drain port remains open, and the liquid is discharged through the pipeline. After pressure filtration, the air inlet is connected to the purging equipment, and high-pressure gas enters the filter frame in reverse through the pipeline, forcing the filter cake to separate from the filter cloth. Since the valve assembly 4 is independently installed outside the filter plate, maintenance can be performed without disassembling the main structure of the filter frame; only the pipeline connection needs to be disconnected. The airflow pressure of the purging equipment can be adjusted according to the adhesion strength of the filter cake, avoiding mechanical impact on the internal structure of the filter frame.

[0051] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A structurally stable filter frame, characterized in that: Includes a first filter plate, a second filter plate, and an elastic ring; The second filter plate and the elastic ring are installed on the same side of the first filter plate, and the elastic ring is arranged around the outer periphery of the second filter plate. The elastic ring and the second filter plate together form a single-sided open filtration space. The elastic ring is provided with a first mounting part, and the first filter plate is provided with a second mounting part that cooperates and connects with the first mounting part. The first filter plate and the second filter plate are respectively provided with feed holes. The feed holes of the first filter plate and the second filter plate are coaxially arranged. The surface of the first filter plate is provided with a first filter hole. The periphery of the first filter plate is provided with an external connection hole. The surface of the second filter plate is provided with a second filter hole. The first filter hole and the second filter hole are connected to the external connection hole through a pipeline.

2. The structurally stable filter frame according to claim 1, characterized in that: The first mounting part consists of several protruding posts, which are arranged to protrude along the bottom surface of the elastic ring, and the several protruding posts are arranged circumferentially around the central axis of the elastic ring. The second mounting part consists of several grooves; A plurality of protruding posts are provided in a one-to-one correspondence with a plurality of grooves, and the protruding posts are respectively installed and inserted into the grooves.

3. A structurally stable filter frame according to claim 2, characterized in that: The elastic ring includes an inner ring wall, an outer ring wall, a top ring wall, and a bottom ring wall connected in sequence; The inner ring wall is attached to the outer wall of the second filter plate, and the bottom wall of the ring is attached to one side surface of the first filter plate; The protruding post is provided on the bottom wall of the ring.

4. A structurally stable filter frame according to claim 1, characterized in that: The first mounting part is an iron ring, which is fixedly disposed at the bottom of the elastic ring; The second mounting part consists of several magnetic components, which are arranged around the center circumference of the first filter plate. The magnetic components are fixedly connected to the first filter plate, and the iron rings are magnetically attracted to each other by the magnetic components.

5. A structurally stable filter frame according to claim 4, characterized in that: The elastic ring includes an inner ring wall, an outer ring wall, a top ring wall, and a bottom ring wall connected in sequence; The inner ring wall is attached to the outer wall of the second filter plate, and the bottom wall of the ring is attached to one side surface of the first filter plate; The iron ring is located on the side of the elastic ring near the bottom wall of the ring.

6. A structurally stable filter frame according to any one of claims 3 or 5, characterized in that: The top wall of the ring is provided with an adsorption groove, which is recessed towards the bottom wall of the ring.

7. A structurally stable filter frame according to claim 6, characterized in that: The area of ​​the inner ring wall is smaller than that of the outer ring wall. The bottom end of the inner ring wall is flush with the bottom end of the outer ring wall. The top end of the inner ring wall is connected to the inner side of the ring top wall through an inner side wall. The inner side wall is inclined from the inside to the outside.

8. A structurally stable filter frame according to claim 7, characterized in that: The adsorption groove divides the top wall of the ring into an inner top wall and an outer top wall. The distance between the inner top wall and the bottom wall of the ring is d2, and the distance between the outer top wall and the bottom wall of the ring is d1, where d1 < d2.

9. A structurally stable filter frame according to claim 8, characterized in that: The first filter plate is provided with a plurality of first filter holes, and the plurality of first filter holes are respectively located at the lower part of the center of the first filter plate; The second filter plate is provided with a plurality of second filter holes, and the plurality of second filter holes are respectively located at the lower part of the center of the second filter plate.

10. A structurally stable filter frame according to claim 9, characterized in that: It also includes pipe and valve assemblies; The valve assembly is disposed outside the first filter plate. The feed end of the valve assembly is connected to the external connection hole, and the discharge end of the valve assembly is provided with a drain port and an air inlet. The air inlet is connected to the purging equipment.

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