A filter with a cleaning brush holder

Abstract

A filter with a cleaning brush holder, comprising a shell, a filter screen and a cleaning brush holder arranged on one side of the filter screen, wherein an impeller is arranged on the cleaning brush holder and can be driven to rotate under the impact of medium flow. A combined support shaft is arranged in the shell, a limit centering flange is arranged on the upper end of the shaft, a plurality of arc convex blocks are arranged on the outer periphery of the flange, and a first rotating pair in discrete point contact is formed with the first shaft sleeve on the cleaning brush holder. The first rotating pair effectively reduces the friction area and the resistance fluctuation. The lower end of the shaft is sequentially provided with an upper limit block and a lower limit block, and the cleaning brush holder is clamped therebetween through a second shaft sleeve. A second rotating pair utilizes an annular taper surface and an annular arc surface to form a continuous self-adaptive line contact, realizes automatic centering and load dispersion, and simultaneously reduces the friction area and the resistance fluctuation. The structure replaces high-precision bearings, guarantees stable rotation and axial limiting of the cleaning brush holder, and significantly reduces the manufacturing cost and maintenance difficulty.

Description

Technical Field

[0001] This utility model relates to the field of filtration equipment technology, and in particular to a filter with a cleaning brush holder. Background Technology

[0002] In many fields such as industrial production, water treatment, petrochemicals, and food processing, filtration equipment is an indispensable key unit. Its core function is to efficiently remove solid particles, suspended matter, and other impurities from liquid or gaseous media, ensuring the stable operation of the production system and extending the service life of the equipment.

[0003] When a filter is in use, as the medium flows through the filter screen, impurities larger than the screen's pore size are trapped on the filter surface. As the filtration process continues, these trapped impurities accumulate and compact on the screen surface, forming a dense filter cake layer. This filter cake layer significantly increases the resistance of the fluid passing through the filter, increasing filtration energy consumption. Simultaneously, the effective filtration area of ​​the screen is covered by blockages, drastically reducing filtration efficiency. When the pressure drop exceeds the allowable value or the flow rate fails to meet requirements, the filter must be shut down for maintenance, including disassembly, manual cleaning, or replacement of the filter screen. This mandatory shutdown not only severely disrupts continuous production processes, causing production efficiency losses, but also incurs high labor maintenance costs and spare parts replacement expenses.

[0004] To overcome the drawback of traditional filters requiring shutdown for cleaning, filters with online self-cleaning capabilities have emerged. One type of design utilizes the kinetic energy of the flowing medium itself to drive the cleaning mechanism. These filters typically have a rotatable cleaning brush holder on one side of the filter screen, with an impeller and cleaning brushes mounted on it. When the medium flows past the impeller, it generates an impact force, driving the impeller and rotating the entire cleaning brush holder. This causes the cleaning brushes to continuously scrape and sweep the filter screen surface during rotation, promptly removing accumulated impurities and maintaining filtration efficiency. Theoretically, this allows for simultaneous filtration and cleaning, reducing or even eliminating downtime.

[0005] However, existing cleaning brush holders exhibit significant fluctuations in rotational resistance. This resistance fluctuation stems from the frictional resistance at the connection between the cleaning brush holder and the support structure. During filter operation, the flow velocity of the medium fluctuates considerably, and the forces on the outer periphery of the cleaning brush holder are unbalanced due to the impact force of the medium. Fluctuations in medium flow velocity or pressure may cause the cleaning brush holder to rotate poorly or even become stuck, significantly reducing the cleaning effect and failing to fully realize the advantages of online cleaning. Furthermore, installing bearing structures at the contact surfaces would greatly increase the manufacturing and maintenance costs of the filter.

[0006] Therefore, in view of the shortcomings of the existing technology, it is necessary to design a filter with a cleaning brush holder to solve the above problems.

[0007] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solution of this utility model and facilitating the understanding of those skilled in the art. It should not be assumed that the above content is known to those skilled in the art simply because it has been described in the background section of this utility model. Utility Model Content

[0008] To overcome the shortcomings of the prior art, the present invention aims to disclose a filter with a cleaning brush holder, which enables the cleaning brush holder to rotate stably with low resistance, while reducing the complexity and cost of the cleaning brush holder connection structure.

[0009] This utility model discloses a filter with a cleaning brush holder, including a housing, a filter screen disposed within the housing, and a cleaning brush holder rotatably disposed on one side of the filter screen's filter surface. The cleaning brush holder is equipped with an impeller that rotates under the impact of media flow. A combined support shaft is provided in the inner cavity of the housing along the axial direction of the cleaning brush holder. A limiting and centering flange is fitted onto the upper end of the combined support shaft, and multiple radially equal arc-shaped protrusions are provided on the outer periphery of the limiting and centering flange. The cleaning brush holder forms a first rotating pair by engaging with the outer periphery of the limiting and centering flange through a first bushing. The arc-shaped protrusions and the first bushing form discrete point contacts to reduce the friction area. An upper limit block and a lower limit block are sequentially fitted onto the lower end of the combined support shaft along the axial direction. The cleaning brush holder is engaged between the upper limit block and the lower limit block through a second bushing, forming a second rotating pair with axial lifting and limiting functions.

[0010] The preferred technical solution is as follows: the arc-shaped protrusion is an arc-shaped noodle structure arranged along the axial direction, and the inner side of the first bushing is provided with an arc-shaped protruding ring along the circumferential direction. The arc-shaped protruding ring is slidably connected to the arc-shaped noodle structure. This suppresses fluctuations in frictional resistance.

[0011] Preferred technical solution: The filter screen divides the housing cavity into an inner cavity and an outer cavity. The inner cavity is connected to the outside of the housing through a medium outlet, and the outer cavity is connected to the outside of the housing through a medium inlet.

[0012] Preferred technical solution: The upper end of the combined support shaft is provided with a filter element fixing tube, the top of the filter element fixing tube is threadedly connected to the housing and communicates with the medium outlet; the filter screen is fixed to the outer periphery of the filter element fixing tube by a locking nut, and the side wall of the filter element fixing tube is provided with an opening communicating with the inner cavity of the filter screen.

[0013] Preferred technical solution: The limiting and centering flange is sleeved and fixed on the outer periphery of the filter element fixing tube.

[0014] Preferred technical solution: The bottom of the outer cavity is provided with a sewage discharge channel that communicates with the outside of the shell.

[0015] Preferred technical solution: A cleaning brush is rotatably connected to the cleaning brush holder, and the cleaning brush contacts the filter surface of the filter screen during the rotation of the cleaning brush holder.

[0016] A preferred technical solution: The top of the lower limit block is provided with an annular arc surface structure, the centerline of which coincides with the axis of the combined support shaft; the inner circumference of the second bushing is a conical structure, which is fitted onto the outer circumference of the annular arc surface structure to form a line contact connection; the centerline of the conical structure coincides with the axis of the cleaning brush holder. This continuous line contact disperses the load and reduces frictional resistance, and automatically aligns the axis under gravity or locking force.

[0017] Preferred technical solution: The inner circumference of the second bushing is an arc-shaped convex ring structure, and the center line of the arc-shaped convex ring structure coincides with the axis of the cleaning brush holder; the lower end of the upper limit block is provided with an upper annular limiting cone surface that contacts and connects with the arc-shaped convex ring structure, and the upper end of the lower limit block is provided with a lower annular limiting cone surface that contacts and connects with the arc-shaped convex ring structure. The center lines of the upper and lower annular limiting cone surfaces coincide with the axis of the combined support shaft.

[0018] Due to the application of the above technical solution, the beneficial effects of this utility model compared with the prior art are as follows:

[0019] 1) In this invention, the first rotary joint utilizes multiple arc-shaped protrusions on the outer periphery of the limiting and centering flange to form discrete point contacts with the arc-shaped protruding ring on the inner side of the first bushing, greatly reducing the contact area compared to a traditional planar surface. When fluctuations in the medium flow rate cause uneven radial force on the cleaning brush holder, the arc-shaped structure can adaptively fine-tune the contact point position, significantly reducing frictional resistance fluctuations.

[0020] 2) The second rotary joint in this invention utilizes the annular conical surface and the annular arc surface to form a continuous adaptive line contact. This structure automatically achieves axis alignment under the action of gravity or locking force, while dispersing the load through line contact to avoid local stress concentration and reduce connection friction resistance.

[0021] 3) This utility model uses the upper limit block and the lower limit block to clamp and limit the second bushing, effectively resisting the axial vibration caused by the impact of the medium, ensuring that the cleaning brush and the filter screen surface always maintain a constant contact pressure, and avoiding cleaning failure due to gaps.

[0022] 4) This utility model replaces the high-precision bearing with the first and second rotary joints, reducing material costs and facilitating disassembly and maintenance. Attached Figure Description

[0023] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 This is a longitudinal sectional view of a filter with a cleaning brush holder according to Embodiment 1;

[0025] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle;

[0026] Figure 3 This is an exploded view of the first rotary joint in Example 1;

[0027] Figure 4 This is an exploded view of the second rotary joint in Example 1;

[0028] Figure 5 This is an exploded view of the second rotating pair in Example 2.

[0029] In the attached diagrams above, 1 is the housing; 11 is the inner cavity; 12 is the outer cavity; 13 is the media outlet; 14 is the media inlet; 15 is the sewage discharge channel; 2 is the filter screen; 3 is the cleaning brush holder; 31 is the impeller; 32 is the first shaft sleeve; 32a is the arc-shaped convex ring; 33 is the second shaft sleeve; 33a is the conical structure; 33b is the arc-shaped convex ring structure; 34 is the cleaning brush; 4 is the combined support shaft; 41 is the limiting and centering flange; 41a is the arc-shaped protrusion; 42 is the upper limit block; 42a is the upper annular limiting conical surface; 43 is the lower limit block; 43a is the annular arc structure; 43b is the lower annular limiting conical surface; 44 is the filter element fixing tube; and 44a is the opening. Detailed Implementation

[0030] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0031] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be used interchangeably where appropriate for the purposes of describing embodiments of this application herein. Furthermore, the terms "comprising" and "having," and their synonyms, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0032] In this application, the terms "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this utility model and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0033] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0034] Furthermore, the terms "installation," "setting," "equipped with," "connection," "linking," "fitting," and "fitting" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Similarly, "fitting" can mean completely or partially fitted. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0036] Example 1:

[0037] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this utility model discloses a filter with a cleaning brush holder, a filter screen 2 disposed inside the housing 1, and a cleaning brush holder 3 rotatably disposed on one side of the filter surface of the filter screen 2. The main components of the present utility model will be described in detail below:

[0038] The cleaning brush holder 3 is equipped with an impeller 31 that rotates under the impact of the flowing medium. A combined support shaft 4 is provided along the axial direction of the cleaning brush holder 3 within the inner cavity of the housing 1. A limiting and centering flange 41 is fitted onto the upper end of the combined support shaft 4. Multiple radially equidistant arc-shaped protrusions 41a are provided on the outer periphery of the limiting and centering flange 41. The cleaning brush holder 3 forms a first rotating pair through the engagement of a first bushing 32 with the outer periphery of the limiting and centering flange 41. The arc-shaped protrusions 41a and the limiting and centering flange 41 are slidably connected, reducing frictional resistance by decreasing the contact area of ​​the connection surface. This design is simple, has low manufacturing cost, and is easy to assemble and disassemble. It should be noted that in this embodiment, the impeller 31 and the first bushing 32 are an integral structure, but in other embodiments, they can be configured as detachable structures.

[0039] The lower end of the combined support shaft 4 is fitted with an upper limit block 42 and a lower limit block 43 in sequence along the axial direction; the cleaning brush holder 3 is engaged between the upper limit block 42 and the lower limit block 43 through the second bushing 33, forming a second rotary pair with axial lifting and limiting function.

[0040] Installation method: Install the filter screen 2 and the limiting and centering flange 41 onto the combined support shaft 4; install the combined support shaft 4 onto the upper housing 1; fit the upper limit block 42 onto the lower end of the combined support shaft 4; install the cleaning brush holder 3 from the lower end of the combined support shaft 4, and fit the first bushing 32 of the cleaning brush holder 3 onto the outer periphery of the limiting and centering flange 41; then install the lower limit block 43, and use the upper limit block 42 and the lower limit block 43 to limit the lifting and lowering of the second bushing 33 of the cleaning brush holder 3, thereby controlling the vertical position of the cleaning brush holder 3, so that the first bushing 32 on the cleaning brush holder 3 always maintains a corresponding sliding connection with the outer periphery of the limiting and centering flange 41.

[0041] Furthermore, such as Figure 1 , Figure 2 and Figure 3 As shown, the arc-shaped protrusion 41a is an arc-shaped surface structure arranged along the axial direction. The inner side of the first bushing 32 is provided with an arc-shaped protrusion ring 32a along the circumferential direction, and the arc-shaped protrusion ring 32a is slidably connected to the arc-shaped surface structure. This allows the first bushing 32 to maintain discrete point contact with the arc-shaped protrusion 41a even when the first bushing 32 fluctuates in the vertical position. At the same time, during long-term use, the wear of a single position of the arc-shaped protrusion 41a can be avoided by adjusting the vertical position of the first bushing 32.

[0042] Furthermore, such as Figure 1 As shown, the filter screen 2 divides the cavity of the housing 1 into an inner cavity 11 and an outer cavity 12. The inner cavity 11 is connected to the outside of the housing 1 through a media outlet 13, and the outer cavity 12 is connected to the outside of the housing 1 through a media inlet 14. The filter surface of the filter screen 2 is arranged to face outwards for easy cleaning.

[0043] Furthermore, such as Figure 1As shown, the upper end of the combined support shaft 4 is provided with a filter element fixing tube 44. The top of the filter element fixing tube 44 is threadedly connected to the housing 1 and communicates with the media outlet 13. The filter screen 2 is fixed to the outer periphery of the filter element fixing tube 44 by a locking nut. The side wall of the filter element fixing tube 44 is provided with an opening 44a communicating with the inner cavity of the filter screen 2. By using the filter element fixing tube 44 to communicate with the media outlet 13 and the inner cavity 11, it is not necessary to separately open a connecting pipe between the inner cavity 11 and the media outlet 13, thus simplifying the structure of the filter.

[0044] Furthermore, such as Figure 1 As shown, the limiting and centering flange 41 is sleeved and fixed on the outer periphery of the filter element fixing tube 44. The filter element fixing tube 44 serves both as a conduit and as a support.

[0045] Furthermore, such as Figure 1 As shown, the bottom of the outer cavity 12 is provided with a sewage discharge channel 15 that communicates with the outside of the shell 1, which facilitates the centralized discharge of impurities.

[0046] Furthermore, such as Figure 1 As shown, a cleaning brush 34 is rotatably connected to the cleaning brush holder 3. The cleaning brush 34 comes into contact with the filter surface of the filter screen 2 during the rotation of the cleaning brush holder 3, which increases the service life of the cleaning brush 34.

[0047] Furthermore, such as Figure 1 , Figure 2 and Figure 4 As shown, the top of the lower limit block 43 is provided with an annular arc surface structure 43a, and the center line of the annular arc surface structure 43a coincides with the axis of the combined support shaft 4; the inner circumference of the second bushing 33 is a conical surface structure 33a, and the conical surface structure is sleeved on the outer circumference of the annular arc surface structure to form a line contact connection. The annular arc surface structure 43a is used to support the conical surface structure 33a of the second bushing 33 from the lower end, and the frictional resistance is reduced through the line contact connection.

[0048] Furthermore, such as Figure 1 , Figure 2 and Figure 4 As shown, the centerline of the conical structure 33a coincides with the axis of the cleaning brush holder 3. During the docking process between the conical structure 33a and the annular arc structure, the centerlines of the two will coincide under the action of gravity or locking force, thereby achieving centering of the cleaning brush holder 3 in the diameter direction.

[0049] When the filter is in use: the medium enters the outer cavity 12 through the medium inlet 14, is filtered by the filter screen 2, and then enters the inner cavity 11, and is discharged through the medium outlet 13; during this process, the medium impacts the impeller 31, driving the cleaning brush holder 3 to rotate, and the cleaning brush 34 scrapes away impurities from the surface of the filter screen 2; the impurities settle along the surface of the filter screen 2 and are discharged through the drain channel 15. It should be noted that when the cleaning brush holder rotates, the upper end is guided by the point contact between the arc-shaped protrusion 41a and the arc-shaped protrusion ring 32a; the lower end slides along the line contact of the conical structure 33a along the annular arc-shaped structure 43a, maintaining axial stability while greatly reducing frictional resistance.

[0050] Example 2, as Figure 1 , Figure 3 and Figure 5 As shown, the difference between this embodiment and Embodiment 1 is that: the inner circumference of the second bushing 33 is an arc-shaped convex ring structure 33b, and the center line of the arc-shaped convex ring structure 33b coincides with the axis of the cleaning brush holder 3; the lower end of the upper limit block 42 is provided with an upper annular limiting cone surface 42a that is in line contact with the arc-shaped convex ring structure 33b, and the upper end of the lower limit block 43 is provided with a lower annular limiting cone surface 43b that is in line contact with the arc-shaped convex ring structure 33b. The center lines of the upper annular limiting cone surface 42a and the lower annular limiting cone surface 43b both coincide with the axis of the combined support shaft 4.

[0051] When the cleaning brush holder rotates, the upper end is guided by the point contact between the arc-shaped protrusion 41a and the arc-shaped protruding ring 32a; the lower end is guided by the line contact sliding between the arc-shaped protruding ring structure 33b and the upper and lower annular limiting cone surfaces 42a and 43b respectively, maintaining axial stability while greatly reducing frictional resistance. In this design, both the upper and lower ends of the arc-shaped protruding ring structure 33b are connected by line contact sliding, so that the movement resistance of the cleaning brush holder 3 will not increase whether the filter is placed upright or upside down, thus increasing the number of installation options for the filter.

[0052] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A filter with a cleaning brush holder, comprising a housing (1), a filter screen (2) disposed within the housing (1), and a cleaning brush holder (3) rotatably disposed on one side of the filter surface of the filter screen (2), wherein the cleaning brush holder (3) is provided with an impeller (31) that is driven to rotate under the impact of the flowing medium, characterized in that: The inner cavity of the housing (1) is provided with a combined support shaft (4) along the axial direction of the cleaning brush holder (3). The upper end of the combined support shaft (4) is fitted with a limiting centering flange (41). The outer periphery of the limiting centering flange (41) is provided with multiple radially equal arc-shaped protrusions (41a). The cleaning brush holder (3) forms a first rotating pair by cooperating with the outer periphery of the limiting centering flange (41) through a first bushing (32). The lower end of the combined support shaft (4) is sequentially fitted with an upper limit block (42) and a lower limit block (43) along the axial direction. The cleaning brush holder (3) is engaged between the upper limit block (42) and the lower limit block (43) through a second bushing (33) to form a second rotating pair with axial lifting and limiting functions.

2. A filter with a cleaning brush holder according to claim 1, characterized in that: The arc-shaped protrusion (41a) is an arc-shaped noodle structure arranged along the axial direction. The inner side of the first bushing (32) is provided with an arc-shaped protrusion ring (32a) along the circumferential direction. The arc-shaped protrusion ring (32a) is slidably connected to the arc-shaped noodle structure.

3. A filter with a cleaning brush holder according to claim 1, characterized in that: The filter (2) divides the cavity of the housing (1) into an inner cavity (11) and an outer cavity (12). The inner cavity (11) is connected to the outside of the housing (1) through a medium outlet (13), and the outer cavity (12) is connected to the outside of the housing (1) through a medium inlet (14).

4. A filter with a cleaning brush holder according to claim 3, characterized in that: The upper end of the combined support shaft (4) is provided with a filter element fixing tube (44). The top of the filter element fixing tube (44) is threadedly connected to the housing (1) and communicates with the medium outlet (13). The filter screen (2) is fixed to the outer periphery of the filter element fixing tube (44) by a locking nut. The side wall of the filter element fixing tube (44) is provided with an opening (44a) that communicates with the inner cavity of the filter screen (2).

5. A filter with a cleaning brush holder according to claim 4, characterized in that: The limiting centering flange (41) is sleeved and fixed on the outer periphery of the filter element fixing tube (44).

6. A filter with a cleaning brush holder according to claim 4, characterized in that: The bottom of the outer cavity (12) is provided with a sewage discharge channel (15) that communicates with the outside of the shell (1).

7. A filter with a cleaning brush holder according to claim 1, characterized in that: A cleaning brush (34) is rotatably connected to the cleaning brush holder (3), and the cleaning brush (34) contacts the filter surface of the filter screen (2) during the rotation of the cleaning brush holder (3).

8. A filter with a cleaning brush holder according to claim 1, characterized in that: The lower limit block (43) has an annular arc surface structure (43a) at its top, and the center line of the annular arc surface structure (43a) coincides with the axis of the combined support shaft (4); the inner circumference of the second bushing (33) is a conical surface structure (33a), and the conical surface structure (33a) is sleeved on the outer circumference of the annular arc surface structure (43a) to form a line contact connection, and the center line of the conical surface structure (33a) coincides with the axis of the cleaning brush holder (3).

9. A filter with a cleaning brush holder according to claim 1, characterized in that: The inner circumference of the second bushing (33) is an arc-shaped convex ring structure (33b), and the center line of the arc-shaped convex ring structure (33b) coincides with the axis of the cleaning brush holder (3). The lower end of the upper limit block (42) is provided with an upper annular limiting cone surface (42a) that is in line contact with the arc-shaped convex ring structure (33b), and the upper end of the lower limit block (43) is provided with a lower annular limiting cone surface (43b) that is in line contact with the arc-shaped convex ring structure (33b). The center lines of the upper annular limiting cone surface (42a) and the lower annular limiting cone surface (43b) coincide with the axis of the combined support shaft (4).

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