Filtering device

Abstract

The utility model relates to the technical field of filtering device structures, in particular to a filtering device. Comprising a first cavity, a second cavity, a clamping structure, a filter screen, a pressing disc and a pressing ring, and the second cavity and the first cavity are connected in a sealed mode to form a filtering cavity; the clamping structure is arranged on the first cavity and the second cavity and is used for fixedly connecting the first cavity and the second cavity into a whole; the filter screen is a flexible sheet-shaped filter screen arranged between the first cavity and the second cavity; the pressing disc is of a plate-shaped structure which is detachably connected between the first cavity and the second cavity and used for supporting the filter screen, the pressing disc is perpendicular to the material flowing direction, and a plurality of through holes are evenly formed in the pressing disc; the pressing ring sleeves the outer side of the circumference of the pressing disc and is coaxial with the pressing disc; and a gap for fixing the circumferential edge of the filter screen is formed between the pressing ring and the pressing disc. The filtering device is simple in structure and convenient to install and use, the whole device can be conveniently disassembled into multiple parts, the filter screen is easy to replace, and the interior of the device is convenient to clean.

Description

Technical Field

[0001] The utility model relates to the technical field of filter device structures, in particular to a filter device. Background Art

[0002] The filter device is an indispensable device for the pipeline system of the conveying medium. Its function is to filter the mechanical impurities in the medium, and can filter the solid particles in the flowing medium to protect the accessories on the equipment pipeline from wear and blockage, and can protect the normal operation of the equipment. Existing filters are all equipped with filter screens, but some impurities may remain in the internal filter screen after long-term use, causing the filter screen to be blocked. Once the filter screen is blocked, it is necessary to disassemble the filter device and remove the filter screen for cleaning or replacement. For example, the Chinese utility model patent with the patent number "CN218794346U" and the name of "a stainless steel flange filter with replaceable filter screen" introduces a filter with replaceable filter screen, which includes a filter body, and a disassembly device is arranged inside the filter body. The disassembly device includes a threaded rod, a rotating rod, a first gear, a second gear and a lifting ring plate. The rotating rod rotates to make the first gear drive the second gear to rotate, and the threaded rod and the second gear rotate synchronously to make the lifting ring plate move up and down. When replacing the filter, turn the rotating rod to let the first gear drive the second gear to rotate, and the threaded rod rotates synchronously with the second gear. When the threaded rod rotates, the lifting ring plate will move up and down along the surface of the threaded rod, so that the lifting ring plate and the fixed ring plate can be separated, and then the filter can be removed, and then a new filter can be replaced through the slot, so as to achieve the effect of facilitating the replacement of the filter. This filter is more convenient for replacing the filter, but there are also other problems, because this filter only disassembles and replaces the filter, but in actual application, not only the filter needs to be replaced and cleaned, but also the internal structure of the filter needs to be cleaned, and the internal structure of the filter is more complicated, and it is more likely to have dead corners, which makes it difficult to clean. Utility Model Content

[0003] The purpose of the utility model is to solve the shortcomings of the above-mentioned background technology and provide a filtering device.

[0004] The technical solution of the utility model is: a filtering device, comprising:

[0005] A first cavity, wherein the first cavity is a hollow cavity structure having a material inlet;

[0006] A second cavity, wherein the second cavity is a hollow cavity structure having a material outlet, and the second cavity is sealed and connected to the first cavity to form a filtering cavity;

[0007] A clamping structure, the clamping structure is arranged on the first cavity and the second cavity to fix the first cavity and the second cavity into one body;

[0008] A filter screen, wherein the filter screen is a flexible sheet filter screen disposed between the first cavity and the second cavity;

[0009] A pressure plate, which is a plate-like structure detachably connected between the first cavity and the second cavity for supporting the filter screen, the pressure plate is perpendicular to the material flow direction, and a plurality of through holes are evenly opened on the pressure plate;

[0010] The pressure ring is sleeved on the outer side of the pressure plate and is coaxially arranged with the pressure plate. A gap is provided between the pressure ring and the pressure plate for fixing the circumferential edge of the filter screen.

[0011] According to a filtering device provided in the present application, the filter screen is arranged on a side of the pressure plate facing the material inlet.

[0012] According to a filtering device provided in the present application, a plurality of support columns extending along the material flow direction are arranged in the second cavity; one end of the support column is connected to the second cavity, and the other end is supported on the end surface of the pressure plate facing the material outlet.

[0013] According to a filtering device provided by the present application, a plurality of support columns are arranged at equal intervals along the circumferential direction of the second cavity with the center line of the second cavity as the center.

[0014] According to a filtering device provided in the present application, the pressure plate does not have a through hole at the contact point with the support column.

[0015] According to a filtering device provided by the present application, the first cavity is a conical structure with a small material inlet at one end and a large material inlet at the other end; the second cavity is a conical structure with a small material outlet at one end and a large material outlet at the other end.

[0016] A filtering device provided according to the present application also includes a sealing rubber gasket; grooves are provided at one end of the first cavity away from the material inlet and at one end of the second cavity away from the material outlet; the sealing rubber gasket is a ring-mounted rubber gasket with flanges on both sides along the material flow direction, and the flanges of the sealing rubber gasket extend into the corresponding grooves when the first cavity and the second cavity are connected as one.

[0017] According to a filtering device provided in the present application, the clamping structure is a clamp-type structure sleeved on the outer side of the circumference of the first cavity and the second cavity, or a clamping structure clamped on both side end surfaces of the first cavity and the second cavity along the material flow direction.

[0018] According to a filtering device provided in the present application, a boss is provided at one end of the second cavity away from the material outlet; and a gap between the boss and the pressure plate is used to place a pressure ring.

[0019] According to a filtering device provided in the present application, an inlet pipe is provided at one end of the first cavity facing the material inlet, and a first sealing ring is installed on the inlet pipe; an outlet pipe is provided at one end of the second cavity facing the material outlet, and a second sealing ring is installed on the outlet pipe.

[0020] The advantages of the present application are as follows: 1. The filter screen of the present application is fixed in the first cavity and the second cavity by a pressure ring and a pressure plate. The first cavity and the second cavity can be quickly disassembled by a clamping structure. The entire filter can be quickly disassembled into multiple parts. Once the filter is blocked or needs to be cleaned, it can be quickly disassembled for cleaning. The disassembly and replacement of the filter screen is extremely convenient and the operation is extremely simple. The overall device structure has no dead corners and can be cleaned very cleanly, which has great promotion value.

[0021] 2. The filter screen of the present application is located on the side of the pressure plate facing the material inlet, that is, the filter screen itself can be pressed on the pressure plate by the force of the material flow, the filter screen is more stably fixed, not easy to move, and the filtering effect is better when used;

[0022] 3. The pressure plate of the present application is supported by a plurality of support columns, which can stably position the pressure plate between the first cavity and the second cavity, provide a stable supporting force for the filter screen, and prevent the pressure plate from deforming when the filtering pressure is high;

[0023] 4. The multiple support columns of the present application are arranged at equal intervals, so that the pressure plate can be stably located between the first cavity and the second cavity, and the pressure plate will not shake or move, and has better stability;

[0024] 5. The pressure plate of the present application does not have a through hole at the contact position of the support column, which can increase the contact area between the support column and the pressure plate on the one hand, and avoid the formation of a dead angle at the contact position to cause material blockage on the other hand;

[0025] 6. The first cavity and the second cavity of the present application are both conical structures, and the formed conical cavity is easy to clean and simple to install and disassemble;

[0026] 7. The present application sets a sealing rubber pad between the first cavity and the second cavity, and uses the flange of the sealing rubber pad to engage in the groove of the first cavity and the second cavity to seal the two, and the overall installation sealing effect is excellent;

[0027] 8. The clamping structure of the present application is simple, easy to install and use, and has low cost;

[0028] 9. The present application provides a step structure at one end of the second cavity away from the material outlet, which facilitates the arrangement of the pressure plate on the one hand and the installation of the pressure ring on the other hand, and can effectively restrict the pressure ring so that the pressure ring can stably fix the filter screen;

[0029] 10. The first cavity and the second cavity of the present application are conveniently connected to the pipeline by providing an inlet pipe and an outlet pipe.

[0030] The filtering device of the present application has a simple structure, is easy to install and use, the entire device can be conveniently disassembled into multiple parts, the filter screen is easy to replace, and the inside of the device is easy to clean, which has great promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 : An axial view of the filter device of the present application;

[0032] Figure 2 : A cross-sectional view of the filter device of the present application;

[0033] Figure 3 : A cross-sectional view of the first cavity of the present application;

[0034] Figure 4 : A cross-sectional view of the second cavity of the present application;

[0035] Figure 5 : A top view of the pressure plate of the present application;

[0036] Figure 6 : A top view of the pressure ring of the present application;

[0037] Among them: 1 - first cavity; 2 - second cavity; 3 - pressure plate; 4 - pressure ring; 5 - support column; 6 - inlet pipe; 7 - outlet pipe. DETAILED DESCRIPTION

[0038] The embodiments of the present invention are described in detail below, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0039] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0040] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0041] The utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0042] The present application relates to a filter device, which is mainly used to filter flowing materials and solid particles in the medium. The material enters from the material inlet of the filter device and is isolated by the filter screen in the filter device. The solid particles in the flowing material are trapped on the side of the filter screen facing the material inlet. The flowing material flows out from the material outlet side of the filter device, and the solid particles in the outflowing material are reduced. The filter device of the present application is a detachable structure. The entire filter device can be quickly disassembled into multiple parts, especially the filter screen can be easily disassembled from the filter device for easy cleaning. The disassembled parts of the filter device are easy to clean, and the overall use is very simple.

[0043] Specifically, Figures 1 to 6 As shown, the filtering device of the present application includes a first cavity 1, a second cavity 2, a clamping structure, a filter screen, a pressure plate 3 and a pressure ring 4. The first cavity 1 and the second cavity 2 form the body of the filtering device. The first cavity 1 is a hollow cavity structure with a material inlet, and the second cavity 2 is a hollow cavity structure with a material outlet. The second cavity 2 and the first cavity 1 are sealed and connected to form a filtering cavity. The material enters from the material inlet of the filtering cavity and flows out from the material outlet of the filtering cavity to be filtered in the filtering cavity. The clamping structure is arranged in the first cavity 1. and the second cavity 2 are used to fix the first cavity 1 and the second cavity 2 as a whole; the filter is a flexible sheet filter arranged between the first cavity 1 and the second cavity 2; the pressure plate 3 is a circular plate structure detachably connected between the first cavity 1 and the second cavity 2 for supporting the filter, the pressure plate 3 is perpendicular to the material flow direction, and a plurality of through holes are evenly opened on the pressure plate 3; the pressure ring 4 is a circular ring structure which is sleeved on the outer side of the circumference of the pressure plate 3 and is coaxially arranged with the pressure plate 3, and a gap is provided between the pressure ring 4 and the pressure plate 3 for fixing the circumferential edge of the filter.

[0044] During actual installation, the filter screen is a flexible sheet structure with a diameter larger than that of the pressure plate 3. The filter screen is placed on the pressure plate 3, and then a pressure ring 4 is sleeved on the outer side of the circumference of the pressure plate 3. The pressure ring 4 is a ring-mounted structure with a diameter larger than that of the pressure plate 3. After the pressure ring 4 is sleeved on the outer side of the circumference of the pressure plate 3, there is a gap between the two. This gap can just accommodate the portion of the filter screen that exceeds the circumferential edge of the pressure plate 3. Thus, the pressure ring 4 and the pressure plate 3 form a clamping structure that fixes the filter screen. Then, the pressure ring 4 and the pressure plate 3 with the filter screen installed are placed between the first cavity 1 and the second cavity 2, so that the pressure plate 3 is fixed between the first cavity 1 and the second cavity 2, and then the first cavity 1 and the second cavity 2 are fixedly connected as a whole from the outside using the clamping structure to complete the assembly of the filter device.

[0045] After using for a period of time, the filter device needs to clean the filter. The clamping structure is removed from the outside to separate the first cavity 1 and the second cavity 2. The pressure ring 4 and the pressure plate 3 with the filter installed are taken out from the first cavity 1 and the second cavity 2. The filter that needs to be cleaned is removed from between the pressure ring 4 and the pressure plate 3, and then the various components of the filter device are cleaned. After completion, the filter device is reassembled in the above manner.

[0046] In some embodiments of the present application, the installation position of the filter screen is optimized. Specifically, the filter screen of the present embodiment is arranged on the side of the pressure plate 3 facing the material inlet. Such an arrangement enables the filter screen to be pressed against the pressure plate 3 under the pressure of the material flow, and the filter screen is fixed more stably.

[0047] The filter is fixed by the pressure ring 4 and the pressure plate 3. After the pressure ring 4 and the pressure plate 3 are sleeved together, they are flush in the direction perpendicular to the material flow, that is, the axial direction of the first cavity and the second cavity. The edge of the filter is clamped in the gap between the pressure ring 4 and the pressure plate 3. This fixing method can effectively display the movement of the filter and avoid the problem of poor filtering effect due to the movement of the filter during use.

[0048] In other embodiments of the present application, the connection structure between the pressure plate 3 and the second cavity 2 is optimized. Figure 2 and 4 As shown, in this embodiment, a plurality of support columns 5 extending along the material flow direction are arranged in the second cavity 2. The plurality of support columns 5 are arranged at equal intervals along the circumferential direction of the second cavity 2 with the center line of the second cavity 2 as the center. In this embodiment, there are four support columns 5. One end of the support column 5 is connected to the second cavity 2, and the other end is supported on the end face of one side of the pressure plate 3 facing the material outlet.

[0049] The support column 5 provides an axial support force for the pressure plate 3 to prevent the pressure plate 3 from shaking in the axial direction. The support column 5 is located on the side of the pressure plate 3 facing away from the material outlet, that is, the support column 5 is located downstream of the pressure plate 3 along the material flow direction. The thrust generated by the material flow on the pressure plate 3 can press the pressure plate 3 against the support column 5, and the pressure plate 3 is fixed in the filter cavity very stably.

[0050] At the same time, in order to limit the movement of the pressure plate 3 and the pressure ring 4 in the radial direction, a boss is provided at the end of the second cavity 2 away from the material outlet in this embodiment, and the gap between the boss and the pressure plate 3 is used to place the pressure ring 4. The boss is provided at the outer edge of the end of the second cavity 2 away from the material outlet, and the boss extends toward the material inlet side along the material flow direction, and forms a step surface with the end of the second cavity 2 away from the material outlet. The circumferential edge of the pressure plate 3 is placed on the step surface of the end of the second cavity 2 away from the material outlet, and the pressure ring 4 is installed between the pressure plate 3 and the circumferential inner side surface of the boss.

[0051] During actual installation, the pressure ring 4 is sleeved onto the outer side of the circumference of the pressure plate 3, the filter screen is installed on the side of the pressure plate 3 facing the material inlet, and then the pressure ring 4, the pressure plate 3 and the filter screen are assembled together on the step surface of the end of the second cavity 2 away from the material outlet, and the side of the pressure plate 3 facing the material outlet is placed on the support column 5.

[0052] In order to prevent the pressure plate 3 and the like from shaking in the filter cavity, a fixing ring is provided on the side of the first cavity 1 away from the material inlet in this embodiment. The fixing ring is a ring-shaped structure with a straight end face. When the first cavity 1 and the second cavity 2 are connected as one, a part of the straight end face of the fixing ring is pressed tightly against the boss, and the other part is pressed tightly against the side of the pressure plate 3 facing the material inlet, thereby limiting the axial movement of the pressure plate 3.

[0053] In some preferred embodiments of the present application, the structure of the pressure plate 3 is optimized. Figure 5 As shown, the pressure plate 3 is a circular plate-like structure, and the pressure plate 3 is arranged axially perpendicular to the first cavity 1 and the second cavity 2. A plurality of through holes are evenly provided on the pressure plate 3, which penetrate along the axial direction, and the through holes are channels for the flow of materials. The pressure plate 3 does not have through holes at the contact point with the support column 5, which can increase the contact area between the support column and the pressure plate on the one hand, and avoid the formation of a dead angle at the contact position to cause material blockage on the other hand.

[0054] In some embodiments of the present application, the structures of the first cavity 1 and the second cavity 2 are optimized. Figure 2 and 3 As shown, the first cavity 1 is a conical structure with a small material inlet at one end and a large material inlet at the other end. Figure 2 and 4As shown, the second cavity 2 is a conical structure with a small material outlet at one end and a large material outlet at the other end. The first cavity 1 and the second cavity 2 are conical hollow structures. The internal space of such a conical structure is also conical, with one end large and the other end small, which is convenient for cleaning and does not form a dead angle. It is easy to clean and clean.

[0055] In order to facilitate the sealing connection between the first cavity 1 and the second cavity 2, a sealing rubber gasket is provided between the first cavity 1 and the second cavity 2 in this embodiment, and a groove is provided at one end of the first cavity 1 away from the material inlet and one end of the second cavity 2 away from the material outlet, which is actually the groove provided on the above-mentioned boss and the fixing ring. The sealing rubber gasket is a ring-mounted rubber gasket with flanges on both sides along the material flow direction, and the flanges of the sealing rubber gasket are extended into the corresponding grooves when the first cavity 1 and the second cavity 2 are connected as a whole.

[0056] During installation, place the sealing gasket between the first cavity 1 and the second cavity 2, so that the flange of the sealing gasket is snapped into the corresponding grooves on the first cavity 1 and the second cavity 2 to form a sealing connection structure, and then use the clamping structure to lock the first cavity 1 and the second cavity 2, and press the sealing gasket between the first cavity 1 and the second cavity 2 to complete the fixed connection between the two.

[0057] In order to facilitate the connection of the first cavity 1 and the second cavity 2 with other pipes, Figures 3-4 As shown, in this embodiment, an inlet pipe 6 is provided at one end of the first cavity 1 facing the material inlet, and a first sealing ring is installed on the inlet pipe 6; an outlet pipe 7 is provided at one end of the second cavity 2 facing the material outlet, and a second sealing ring is installed on the outlet pipe 7.

[0058] In a further embodiment of the present application, the above-mentioned clamping structure is optimized in this embodiment. Specifically, the clamping structure of this embodiment can be in various forms, such as a clamp-type structure (not shown in the figure) sleeved on the outer side of the circumference of the first cavity 1 and the second cavity 2, or a clamping structure (not shown in the figure) clamped on the end faces of both sides of the first cavity 1 and the second cavity 2 along the material flow direction. As long as the first cavity 1 and the second cavity 2 can be fixedly connected as one.

[0059] In actual use, first install the filter screen, place the filter screen on the side of the pressure plate 3 facing the material inlet, sleeve the pressure ring 4 onto the outer circumference of the pressure plate 3, and clamp the circumferential edge of the filter screen into the circumferential gap between the two. Then install the assembled pressure ring 4 and the pressure plate 3 onto the second cavity 2, and place the circumferential edge of the pressure plate 3 on the step surface of the second cavity 2. The side of the pressure plate 3 facing away from the material inlet is supported on the support column 5, and the pressure ring 4 is between the pressure plate 3 and the boss; then align the first cavity 1 with the second cavity 2 so that the two Coaxially arranged, the fixing ring of the first cavity 1 is pressed on the circumferential edge of the pressure plate 3 facing the material inlet, limiting the pressure plate 3 between the first cavity 1 and the second cavity 2; the sealing rubber pad is placed between the first cavity 1 and the second cavity 2, so that the flange of the sealing rubber pad is snapped into the corresponding grooves on the first cavity 1 and the second cavity 2 to form a sealed connection structure, and then the first cavity 1 and the second cavity 2 are locked using a clamping structure, and the sealing rubber pad is pressed between the first cavity 1 and the second cavity 2 to complete the fixed connection between the two;

[0060] When disassembly is required, remove the clamping structure from the outside to separate the first cavity 1 and the second cavity 2, take out the pressure ring 4 and the pressure plate 3 with the filter installed from the first cavity 1 and the second cavity 2, remove the filter to be cleaned from between the pressure ring 4 and the pressure plate 3, and then clean the various components of the filter device. After completion, reassemble the filter device in the above manner.

[0061] The axial direction of this application Figure 2 The up and down directions in the present application are from top to bottom, wherein the material flow direction of the present application is from top to bottom; the radial direction of the present application refers to Figure 2 The circumferential direction of the present application refers to the direction of divergence from the center of the first cavity and the second cavity to the surrounding areas. Figure 2 The circumferential direction with the center of the first cavity and the center of the second cavity as the center.

[0062] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A filtering device, characterized in that: include, A first cavity (1), wherein the first cavity (1) is a hollow cavity structure having a material inlet; A second cavity (2), wherein the second cavity (2) is a hollow cavity structure having a material outlet, and the second cavity (2) is sealedly connected to the first cavity (1) to form a filtering cavity; A clamping structure, the clamping structure being arranged on the first cavity (1) and the second cavity (2) and being used to fix the first cavity (1) and the second cavity (2) into one body; A filter screen, wherein the filter screen is a flexible sheet-shaped filter screen arranged between the first cavity (1) and the second cavity (2); A pressure plate (3), the pressure plate (3) being a plate-like structure detachably connected between the first cavity (1) and the second cavity (2) and used to support the filter screen, the pressure plate (3) being perpendicular to the material flow direction, and having a plurality of through holes evenly formed on the pressure plate (3); A pressure ring (4) is sleeved on the outer circumference of the pressure plate (3) and is coaxially arranged with the pressure plate (3); a gap is provided between the pressure ring (4) and the pressure plate (3) for fixing the circumferential edge of the filter screen.

2. A filtering device according to claim 1, characterized in that: The filter screen is arranged on a side of the pressure plate (3) facing the material inlet.

3. A filtering device according to claim 1, characterized in that: A plurality of support columns (5) extending along the material flow direction are arranged in the second cavity (2); one end of the support column (5) is connected to the second cavity (2), and the other end is supported on the end surface of the pressure plate (3) facing the material outlet.

4. A filtering device according to claim 3, characterized in that: The plurality of support columns (5) are arranged at equal intervals along the circumferential direction of the second cavity (2) with the center line of the second cavity (2) as the center.

5. A filtering device according to claim 3 or 4, characterized in that: The pressure plate (3) has no through hole at the contact point with the support column (5).

6. A filtering device according to claim 1, characterized in that: The first cavity (1) is a conical structure with a small material inlet at one end and a large material inlet at the other end; the second cavity (2) is a conical structure with a small material outlet at one end and a large material inlet at the other end.

7. A filtering device according to claim 6, characterized in that: It also includes a sealing rubber pad; a groove is provided at one end of the first cavity (1) away from the material inlet and at one end of the second cavity (2) away from the material outlet; the sealing rubber pad is a ring-mounted rubber pad with flanges on both sides along the material flow direction, and the flanges of the sealing rubber pad extend into the corresponding grooves when the first cavity (1) and the second cavity (2) are connected as a whole.

8. A filtering device according to claim 1, characterized in that: The clamping structure is a clamping structure sleeved on the outer circumference of the first cavity (1) and the second cavity (2), or a clamping structure clamped on the end surfaces on both sides of the first cavity (1) and the second cavity (2) along the material flow direction.

9. A filtering device according to claim 1, characterized in that: A boss is provided at one end of the second cavity (2) away from the material outlet; and a gap between the boss and the pressure plate (3) is used to accommodate a pressure ring (4).

10. A filtering device according to claim 1, characterized in that: An inlet pipe (6) is arranged at one end of the first cavity (1) facing the material inlet, and a first sealing ring is installed on the inlet pipe (6); an outlet pipe (7) is arranged at one end of the second cavity (2) facing the material outlet, and a second sealing ring is installed on the outlet pipe (7).

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