Multi-stage filter

Abstract

The utility model belongs to the field of water conveying pipelines, and particularly discloses a multistage filter which comprises a shell and a filtering component, a medium flow channel is formed in the shell, a medium inlet with a downward opening is formed in the lower end of the medium flow channel, and the upper end of the medium flow channel is bent and extends upwards to form a medium outlet with an upward opening; the filtering component comprises a plurality of filtering net cylinders, the filtering net cylinders are arranged in the medium flow channel side by side and used for sequentially filtering media flowing through the medium flow channel, and the number of meshes of the filtering net cylinders is gradually increased in the direction of the medium flow channel from the medium inlet to the medium outlet. The multi-stage filter has excellent filtering and anti-blocking effects, and is particularly suitable for filtering impurities in front of an air valve.

Description

Technical Field

[0001] This application pertains to the field of water pipelines, and more specifically, relates to a multi-stage filter. Background Technology

[0002] A filter is a device commonly used in piping systems to filter solid impurities, suspended solids, and other contaminants from the media.

[0003] In related technologies, Y-type filters, T-type filters, and other filters are commonly installed in pipeline systems. These filters are typically installed upstream of devices such as air valves and pumps in the pipeline system, and the media is filtered by the horizontally or obliquely oriented filter components inside the filter. However, most of these traditional filters use a single filter cartridge for impurity filtration, which is prone to clogging during use. Especially when the filter is installed upstream of an air valve, if the filter becomes clogged, it will directly affect the performance of the air valve and may even cause the air valve to fail, affecting the long-term stable operation of the pipeline system. Utility Model Content

[0004] In response to the shortcomings or improvement needs of existing technologies, this application provides a multi-stage filter designed to improve the problem of clogging that is common in traditional filters.

[0005] This application provides a multi-stage filter, specifically including a housing and filter components, wherein:

[0006] The housing has a medium flow channel inside, the lower end of the medium flow channel has a medium inlet with an opening facing downwards, and the upper end of the medium flow channel bends upwards and extends to form a medium outlet with an opening facing upwards.

[0007] The filtering component includes multiple filter cylinders, which are arranged side by side in the medium flow channel and are used to filter the medium flowing through the medium flow channel in sequence. The mesh size of the multiple filter cylinders increases progressively along the medium flow channel direction from the medium inlet to the medium outlet.

[0008] Compared with the prior art, the filter component of this filter includes multiple filter cylinders, which can perform multi-stage filtration of the medium to obtain excellent filtration efficiency. By arranging multiple filter cylinders side by side, the filter will have a larger impurity retention space, which can retain more impurities, making the filter less prone to clogging.

[0009] In actual use, large particles of impurities in the medium are first captured by the filter cylinder with a smaller mesh size, while small particles are captured in the subsequent filter cylinder with a larger mesh size. This hierarchical design can effectively reduce the burden on each filter cylinder and reduce the risk of clogging.

[0010] Meanwhile, in this design, the pressure distribution of the fluid medium inside the filter is dispersed rather than concentrated in a single filter cylinder. This pressure dispersion reduces the possibility of overload and clogging of a single filter cylinder, making the entire filter work more stably. Compared with traditional filters, this filter has a better filtration and anti-clogging effect.

[0011] As a further preferred embodiment, the housing is provided with an upward-facing inspection port, through which the filter component can be installed into and removed from the housing, and a removable inspection cover is installed at the outer end of the inspection port.

[0012] As a further preferred embodiment, a baffle for supporting the filter component is provided inside the medium flow channel, and the baffle and the inner wall of the medium flow channel together form a medium guide port covered only by a filter screen with the smallest mesh count.

[0013] As a further preferred embodiment, the bottom surface and side walls of the filter cylinder are provided with mesh holes, and the top of the filter cylinder is set as an open opening.

[0014] As a further preferred embodiment, the top of the filter cylinder is provided with a gripping structure.

[0015] As a further preferred embodiment, the top outer side of the filter cylinder is provided with a protrusion, and the housing is provided with a groove for positioning the protrusion.

[0016] As a further preferred embodiment, the filter component also includes a filter plate disposed between adjacent filter cylinders.

[0017] As a further preferred embodiment, the housing is provided with a positioning structure for limiting the installation of the filter plate.

[0018] As a further preferred embodiment, the housing includes a hollow main housing with a medium inlet, and a pipe connected to the side of the main housing with a medium outlet.

[0019] As a further preferred embodiment, the side of the housing is connected to a switchable and adjustable venting structure.

[0020] In summary, compared with the prior art, the technical solutions conceived in this application have the following main technical advantages:

[0021] 1. The filter components of this filter include multiple filter cylinders and filter plates, which can filter the media step by step to obtain excellent filtration efficiency. In addition, by arranging multiple filter cylinders side by side, the filter has a large impurity retention space, which can retain more impurities, making the filter not easily clogged while having excellent filtration performance.

[0022] 2. This filter is particularly suitable for filtering media before air valves. With the addition of a venting structure on the housing, this filter can also be used for flushing air valves. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of a multi-stage filter provided in an embodiment of this application;

[0024] Figure 2 This is a cross-sectional view of a multi-stage filter provided in an embodiment of this application;

[0025] Figure 3 This is a schematic diagram of the internal structure of a multi-stage filter provided in an embodiment of this application;

[0026] Figure 4 This is a schematic diagram of the structure of a filter cylinder provided in an embodiment of this application.

[0027] In all the accompanying drawings, the same reference numerals are used to denote the same elements or structures, wherein:

[0028] 1. Shell; 1-1. Inspection cover; 1-2. Partition; 1-3. Limiting protrusion; 1-4. Main shell; 1-5. Tube body; 1-6. Boss; 1-7. Sealing ring; 2. Filter screen cylinder; 2-1. Holding structure; 2-2. Protrusion; 3. Filter plate; 10. Medium flow channel; 20. Medium inlet; 30. Medium outlet; 40. Inspection port; 50. Medium guide port. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0030] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.

[0031] This application discloses a multi-stage filter. (Refer to...) Figure 1 and Figure 2 The multi-stage filter includes a housing 1 and a filter element. The housing 1 has a media flow channel 10 inside. The lower end of the media flow channel 10 has a media inlet 20 with an opening facing downwards. The upper end of the media flow channel 10 bends upwards and forms a media outlet 30 with an opening facing upwards. The filter element includes multiple filter cylinders 2. The multiple filter cylinders 2 are arranged side by side in the media flow channel 10 and are used to filter the media flowing through the media flow channel 10 in sequence. The mesh size of the multiple filter cylinders 2 increases progressively along the media flow channel 10 from the media inlet 20 to the media outlet 30.

[0032] With this design, the multiple filter cylinders 2 of this filter can perform multi-stage filtration of the medium and achieve excellent filtration efficiency. By arranging multiple filter cylinders 2 side by side, the filter will have a larger impurity retention space, which can retain more impurities and makes the filter less prone to clogging.

[0033] In actual use, large particles in the medium are first captured by the filter cylinder 2 with a smaller mesh count (equivalent to a larger pore size), while smaller particles are captured in subsequent filter cylinders 2 with even smaller mesh counts (equivalent to smaller pore sizes). This hierarchical design effectively reduces the load on each filter cylinder 2, lowering the risk of clogging. Simultaneously, this design distributes the pressure of the fluid medium in a dispersed manner, rather than concentrating it in a single filter cylinder 2. This pressure dispersion reduces the possibility of overload and clogging in a single filter cylinder 2, making the entire filter operate more stably and providing excellent filtration and anti-clogging performance.

[0034] For ease of understanding, Figure 2 The direction of the medium flow channel 10 from the medium inlet 20 to the medium outlet 30 is roughly indicated by the pointing line a. The mesh count of the multiple filter cylinders 2 located in the medium flow channel 10 increases step by step along the direction indicated by the pointing line a.

[0035] Furthermore, such as Figure 2 As shown, in some embodiments, to facilitate maintenance of multi-stage filters, the housing 1 is provided with an upward-facing maintenance port 40, through which filter components can be installed into and removed from the housing 1; furthermore, a removable maintenance cover 1-1 is installed on the outer end of the maintenance port 40.

[0036] Furthermore, such as Figure 2 As shown, in some embodiments, in order to improve the sealing performance of the inspection cover 1-1 and the inspection port 40, a sealing ring 1-7 is provided at the joint between the outer ends of the inspection cover 1-1 and the inspection port 40.

[0037] Furthermore, such as Figure 2 As shown, in some embodiments, a partition 1-2 for supporting the filter component is provided in the medium flow channel 10. The partition 1-2 and the inner wall of the medium flow channel 10 together form a medium guide port 50 covered only by the filter screen cylinder 2 with the smallest mesh size.

[0038] In this design, when the medium flows into the multi-stage filter through the medium inlet 20, the medium enters the filter cylinder 2 with the smallest mesh size from bottom to top along the medium guide port 50 and is filtered by the filter cylinder 2 with the smallest mesh size; then, the medium flows laterally and is filtered sequentially through multiple filter cylinders 2, and is finally discharged from the medium outlet 30.

[0039] Furthermore, such as Figure 3 , Figure 4 As shown, in some embodiments, the bottom surface and side walls of the filter cylinder 2 are provided with mesh holes, and the top of the filter cylinder 2 is set as an open opening. With this design, the filter cylinder 2 can filter the medium through the bottom surface and side walls, while the open design at the top facilitates the emptying of impurities from the filter cylinder 2 by personnel.

[0040] Furthermore, such as Figure 3 , Figure 4 As shown, in some embodiments, a grip structure 2-1 is provided on the top of the filter cylinder 2 to facilitate cleaning by personnel. The grip structure 2-1 includes, but is not limited to, a lifting handle or a grip.

[0041] Furthermore, such as Figure 3 , Figure 4 As shown, in some embodiments, a protrusion 2-2 is provided on the outer top of the filter cylinder 2, and a groove for positioning the protrusion 2-2 is provided inside the housing 1. The groove has an opening extending to the outer end face of the inspection port 40. With this design, the installation stability of the filter cylinder 2 inside the housing 1 can be improved through the cooperation of the protrusion 2-2 and the groove.

[0042] Furthermore, such as Figure 4 As shown, in some embodiments, the upper opening of the filter cylinder 2 is beveled. That is, the top of the filter cylinder 2 is higher at one radial end and lower at the other radial end. By designing the opening with a beveled cut, it is easier for personnel to empty the impurities in the filter cylinder 2.

[0043] Furthermore, such as Figure 2 , Figure 3 As shown, in some embodiments, the filter component further includes a filter plate 3 disposed between adjacent filter cylinders 2. By providing the filter plate 3, the medium flowing between adjacent filter cylinders 2 can be filtered, further improving the filtration effect of the filter.

[0044] Furthermore, to ensure the stable installation of the filter plate 3, a positioning structure for limiting the installation of the filter plate 3 is provided inside the housing 1.

[0045] In some embodiments, such as Figure 2 , Figure 3 As shown, the positioning structure includes limiting protrusions 1-3 protruding from the inner wall of the housing 1. The limiting protrusions 1-3 are arranged in pairs to form a group, and two limiting protrusions 1-3 in a group form a limiting groove. This limiting groove can slide and adapt to the peripheral edge of the filter plate 3 to guide and limit its installation. After the filter plate 3 is installed into the media flow channel 10 along the limiting groove, the partition plate 1-2 provides support for the filter plate 3, achieving stable installation.

[0046] Of course, in other embodiments, the limiting structure may also adopt other existing structures. For example, the limiting structure includes an elongated groove formed on the inner wall of the housing 1 and extending from top to bottom, and the inner wall of the elongated groove is slidably fitted with the peripheral edge of the filter plate 3.

[0047] Furthermore, such as Figure 2 , Figure 3 As shown, in some specific embodiments, the housing 1 includes a hollow main housing 1-4 with a medium inlet 20, and a pipe 1-5 connected to the side of the main housing 1-4 and having a medium outlet 30. Flanges are provided at the outer ends of the medium inlet 20 of the housing 1 and the outer ends of the medium outlet 30 of the main housing 1-4.

[0048] Furthermore, the number and mesh size of the filter cylinders 2 and filter plates 3 can be adjusted according to requirements. For example, in some specific embodiments, the filter component specifically includes two filter cylinders 2 and one filter plate 3. One filter cylinder 2 has a mesh size of approximately 2-3 meshes and is located at the medium guide port 50. The other filter cylinder 2 is located at the interface of the pipe body 1-5 and has a mesh size of approximately 50 meshes. The filter plate 3 is located between the two filter cylinders 2 and has a mesh size of approximately 2 meshes.

[0049] In addition, in some embodiments, the mesh count of the filter components such as filter cylinder 2 and filter plate 3 can be set such that the mesh count of multiple filter cylinders 2 and filter plates 3 increases progressively in multiple stages along the flow direction of the medium.

[0050] Furthermore, in some embodiments, a switchable and adjustable venting structure is connected to the side of the housing 1. For example, the venting structure includes a boss 1-6 disposed on the side of the main housing 1-4 in the housing 1, and a ball valve (or other valve with switching function) connected to the boss 1-6, the inlet end of the ball valve communicating with the inner cavity of the main housing 1-4; by opening and closing the ball valve, the medium inside the housing 1 can be vented.

[0051] In some design schemes where it is unclear whether a venting structure is required, only bosses 1-6 can be installed on the side walls of the main housing 1-4 to provide a good installation base for ball valves that may be added later.

[0052] It should be emphasized that this filter is particularly suitable for filtering media before air valves. Typically, in piping systems, a maintenance valve is installed at the media inlet (20) and an air valve is installed at the media outlet (30).

[0053] In addition, when this filter has a venting structure, it can also be used for flushing air valves. That is, when air valve flushing is required, close the maintenance valve and open the ball valve, then add water to the air valve. After the water flow flushes the air valve and filter components, it will be discharged from the ball valve, achieving the effect of flushing the air valve.

[0054] It should be understood that expressions such as "comprising" and "may include" as used in this application indicate the existence of the disclosed functions, operations, or constituent elements, and do not limit one or more additional functions, operations, and constituent elements. In this application, terms such as "comprising" and / or "having" may be interpreted as indicating a specific characteristic, number, operation, constituent element, component, or combination thereof, but should not be interpreted as excluding the existence or possibility of adding one or more other characteristics, numbers, operations, constituent elements, components, or combinations thereof.

[0055] It should be understood that the terms “center,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “inner,” “outer,” “clockwise,” “counterclockwise,” “axial,” “radial,” and “circumferential” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application 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 application.

[0056] Furthermore, the terms "first" and "second" 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" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0057] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0058] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A multi-stage filter, characterized in that, Includes a housing (1) and a filter element, wherein: The housing (1) is provided with a medium flow channel (10) inside. The lower end of the medium flow channel (10) has a medium inlet (20) with an opening facing downwards, and the upper end of the medium flow channel (10) bends upwards and forms a medium outlet (30) with an opening facing upwards. The filter component includes multiple filter cylinders (2), which are arranged side by side in the medium flow channel (10) and are used to filter the medium flowing through the medium flow channel (10) in sequence. The mesh count of the multiple filter cylinders (2) increases gradually along the medium flow channel (10) from the medium inlet (20) to the medium outlet (30).

2. The multi-stage filter as described in claim 1, characterized in that, The housing (1) is provided with an upward-facing inspection port (40). The filter component can be installed into the housing (1) and removed from the housing (1) through the inspection port (40). A detachable inspection cover (1-1) is installed on the outer end of the inspection port (40).

3. The multi-stage filter as described in claim 1, characterized in that, The medium flow channel (10) is provided with a partition (1-2) for supporting the filter component. The partition (1-2) and the inner wall of the medium flow channel (10) together form a medium guide port (50) covered only by the filter cylinder (2) with the smallest mesh size.

4. The multi-stage filter as described in claim 1, characterized in that, The bottom and side walls of the filter cylinder (2) are provided with mesh holes, and the top of the filter cylinder (2) is set as an open opening.

5. The multi-stage filter as described in claim 1, characterized in that, The top of the filter cylinder (2) is provided with a gripping structure (2-1).

6. The multi-stage filter as described in claim 1, characterized in that, The top outer side of the filter cylinder (2) is provided with a protrusion (2-2), and the shell (1) is provided with a groove for positioning the protrusion (2-2).

7. The multi-stage filter as described in any one of claims 1-6, characterized in that, The filter component also includes a filter plate (3) disposed between adjacent filter cylinders (2).

8. The multi-stage filter as described in claim 7, characterized in that, The housing (1) is provided with a positioning structure for limiting the installation of the filter plate (3).

9. The multi-stage filter according to any one of claims 1-6, characterized in that, The housing (1) includes a hollow main housing (1-4) with a medium inlet (20) and a tube (1-5) connected to the side of the main housing (1-4) and having a medium outlet (30).

10. The multi-stage filter according to any one of claims 1-6, characterized in that, The side of the housing (1) is connected to a switchable and adjustable venting structure.

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