A filter

Abstract

The application discloses a filter, which comprises a shell, a water inlet is arranged on one end of the shell, a water outlet is arranged on the other end of the shell, a water inlet pipe and a water outlet pipe are correspondingly connected to the water inlet and the water outlet, a filter cartridge assembly is arranged in the shell, the filter cartridge assembly comprises a filter cartridge body and a rotating shaft, the rotating shaft is axially inserted into and fixed on the filter cartridge body, a driving impeller is fixed on the rotating shaft, the driving impeller and the filter cartridge body are both located between the water inlet and the water outlet, and the rotating shaft is rotatably connected to the shell through a supporting device, so that the filter cartridge assembly can rotate in the shell. The filter provided by the application can avoid that the particulate impurities such as silt are deposited on the mesh wall of the filter cartridge body, thereby the filter cartridge body does not need to be disassembled to clean the particulate impurities such as silt on the filter cartridge body, the use of manual labor is reduced, the working efficiency of the filter is improved, and the filter cartridge body of the application does not need to use an additional power device for rotation, so that the manufacturing cost of the filter is reduced.

Description

Technical Field

[0001] This application relates to the field of filter equipment technology, and particularly to a filter. Background Technology

[0002] Because factories require high-quality cooling water for equipment and domestic water, filters are usually installed on the pipelines to improve the water quality.

[0003] Filters are an indispensable device in pipelines transporting media. They are typically installed at the inlet end of pressure reducing valves, pressure relief valves, level control valves, and other equipment. A filter consists of a cylinder, a stainless steel filter screen, and a drain section. After the water to be treated passes through the filter cylinder, impurities are blocked. After a period of use, impurities accumulate on the filter screen. If these impurities are not cleaned in time, the filter will become clogged, leading to reduced water output and impacting production needs. Current technology typically requires disassembling the filter screen or cylinder to clean the accumulated sediment. This increases labor costs, and the filter cannot function properly during disassembly, reducing its efficiency.

[0004] Therefore, how to provide a filter that allows for cleaning of the filter screen or filter cartridge without disassembling it is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide a filter that allows for cleaning of the filter screen or filter cartridge without disassembling it.

[0006] To achieve the above objectives, the present invention provides a filter comprising:

[0007] The shell is a hollow column. The two ends of the shell are detachably connected to an upper end cover and a lower end cover. One end of the shell has a water inlet and the other end of the shell has a water outlet.

[0008] The inlet pipe and outlet pipe are connected to the inlet and outlet respectively;

[0009] The filter cartridge assembly is located inside the housing. The filter cartridge assembly includes a filter cartridge body and a rotating shaft. The rotating shaft is axially inserted and fixed on the filter cartridge body. A drive impeller is fixed on the rotating shaft. The drive impeller and the filter cartridge body are both located between the inlet and the outlet. The rotating shaft is rotatably connected to the housing through a support device so that the filter cartridge assembly can rotate inside the housing.

[0010] A filter has a collection chamber in which the space between the bottom of the filter cartridge body and the lower end cover is provided. The bottom of the filter cartridge body is provided with a drain port. The inlet pipe and the outlet pipe are both inclinedly arranged on the shell so that when the inlet pipe and the outlet pipe are vertically and horizontally connected to the conveying medium pipeline, the shell is in an inclined state, so that impurities in the filter cartridge body can flow from the drain port into the collection chamber.

[0011] A filter has flange seats at the ends of both the inlet pipe and the outlet pipe for connecting to pipelines for conveying media. The angle between the extension direction of the inlet pipe and the direction of the housing toward the upper end cover is an acute angle, and the angle between the extension direction of the outlet pipe and the direction of the housing toward the upper end cover is an obtuse angle.

[0012] A filter has a support device comprising a lower bearing bracket, a lower bearing, and an upper bearing. The upper bearing is fixed inside the upper end cover, the lower bearing bracket is fixed inside the housing, and the lower bearing is fixed on the axis of the lower bearing bracket. One end of the rotating shaft is connected to the upper bearing, and the other end of the rotating shaft is connected to the lower bearing.

[0013] A filter has an outer diameter of the filter cartridge body that is smaller than the inner diameter of the housing, and an annular sealing brush is provided at the bottom of the filter cartridge body, with the circumferential surface of the annular sealing brush adhering to the inner wall of the bearing bracket.

[0014] A filter has an outer wall flushing valve and an inner wall flushing valve axially arranged on the upper end cover, and a drain valve axially arranged on the lower end cover. The outer wall flushing valve, the inner wall flushing valve, and the drain valve are all connected to the housing. One end of a rotating shaft extends toward the upper end cover until it is connected to the inner wall flushing valve. The rotating shaft is a hollow rotating shaft and has uniformly arranged spray holes on its circumferential surface.

[0015] A filter includes a main drive unit comprising a drive rod axially inserted into an upper end cover. A main gear is connected to the drive rod located inside a housing, and a driven gear is fixed on a rotating shaft. The main gear and the driven gear mesh with each other, and rotation of the drive rod enables the filter cartridge assembly to rotate within the housing.

[0016] A filter in which a drive rod can move axially within an upper end cover, thereby achieving engagement or disengagement between a main gear and a driven gear through the axial movement of the drive rod.

[0017] A filter has a limiting member and a sealing gasket fixed on the drive rod. The limiting member is located on the drive rod outside the upper end cover, and the sealing gasket is attached to the upper surface of the main gear.

[0018] A filter has an O-ring and a gland fixed on the upper surface of the upper end cover. The gland fits against the upper surface of the O-ring, and the inner wall of the O-ring fits tightly against the outer surface of the drive rod.

[0019] Regarding the aforementioned background technology, the rotating shaft of this invention is rotatably connected to the housing via a support device. A drive impeller is mounted on the rotating shaft and is located between the inlet and outlet. Therefore, when water flows within the housing, it drives the drive impeller to rotate, which in turn drives the rotating shaft to rotate. The rotating shaft then drives the filter cartridge body to rotate. The rotation of the filter cartridge body prevents impurities such as mud and sand from adhering to and depositing on the screen wall of the filter cartridge body. Thus, the filter provided by this invention can prevent particulate impurities such as mud and sand from depositing on the screen wall of the filter cartridge body, thereby eliminating the need to disassemble the filter cartridge body to clean the impurities, reducing manual labor, improving the working efficiency of the filter, and reducing the manufacturing cost of the filter by eliminating the need for an additional power device for the rotation of the filter cartridge body. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the filter structure provided in an embodiment of this application;

[0021] Figure 2 This is a schematic diagram of the main gear meshing state provided in an embodiment of this application;

[0022] Figure 3 This is a schematic diagram of the main gear in the separated state provided in an embodiment of this application;

[0023] Figure 4 This is a schematic diagram of the drive impeller structure provided in an embodiment of this application;

[0024] Figure 5 This is a schematic diagram of the bearing bracket structure provided in an embodiment of this application.

[0025] in:

[0026] 1-Shell, 2-Inlet pipe, 3-Outlet pipe, 4-Filter cartridge assembly, 5-Main drive unit;

[0027] 11-Upper end cover, 111-Outer wall flushing valve, 112-Inner wall flushing valve, 12-Lower end cover, 121-Drain valve;

[0028] 41-Filter cartridge body, 42-Rotating shaft, 421-Spray hole, 43-Drive impeller, 44-Support device, 441-Lower bearing bracket, 442-Lower bearing, 443-Upper bearing, 45-Annular closed brush;

[0029] 51-Drive rod, 52-Main gear, 53-Driven gear, 54-Limiting component, 55-Sealing gasket, 56-O-ring seal, 57-Glander cap. Detailed Implementation

[0030] The core of this application is a filter that allows for cleaning of the filter screen or filter cartridge without disassembling it.

[0031] To enable those skilled in the art to better understand the present invention, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] See Figures 1-5 This application provides a filter comprising: a housing 1, which is a hollow cylinder; an upper end cover 11 detachably connected to the upper end of the housing 1; a lower end cover 12 detachably connected to the lower end of the housing 1; a water inlet on the side wall of the housing 1 near the lower end cover 12, connected to a water inlet pipe 2; and a water outlet on the side wall of the housing 1 near the upper end cover 11, connected to a water outlet pipe 3. Both the water inlet pipe 2 and the water outlet pipe 3 are connected to the housing 1; and a filter cartridge assembly 4. The filter cartridge assembly 4, located within the housing 1, includes a filter cartridge body 41 and a rotating shaft 42. The rotating shaft 42 is axially inserted into and fixed on the filter cartridge body 41. More specifically, the rotating shaft 42 is located on the center line of the filter cartridge body 41, which is located between the inlet and the outlet. A drive impeller 43 is fixed on the rotating shaft 42, so that the drive impeller 43 is located between the inlet and the outlet. The rotating shaft 42 is rotatably connected to the housing 1 through a support device 44, so that the filter cartridge assembly 4 can rotate within the housing 1.

[0033] In this application, since the rotating shaft 42 is rotatably connected to the housing 1 through the support device 44, and the rotating shaft 42 is provided with a drive impeller 43, which is located between the inlet and outlet, when the water flows in the housing 1, it drives the drive impeller 43 to rotate, which in turn drives the rotating shaft 42 to rotate, and the rotating shaft 42 in turn drives the filter cartridge body 41 to rotate. The rotation of the filter cartridge body 41 prevents mud and other impurities from adhering to and depositing on the screen wall of the filter cartridge body 41. Therefore, the filter provided in this application embodiment can prevent mud and other particulate impurities from depositing on the screen wall of the filter cartridge body 41, thus eliminating the need to disassemble the filter cartridge body 41 to clean the mud and other particulate impurities on the filter cartridge body 41, reducing manual labor and improving the working efficiency of the filter. Furthermore, the rotation of the filter cartridge body 41 in this application does not require the use of an additional power device, reducing the manufacturing cost of the filter.

[0034] Based on the above embodiments, the upper end cover 11 and the lower end cover 12 are respectively detachably connected to the housing 1 by threaded connection or snap-fit ​​connection. The connection method can be selected according to the actual sealing requirements. In this application, the connection is specifically threaded. Furthermore, in order to ensure that the upper end cover 11 and the lower end cover 12 are respectively sealed to the housing 1, a sealing gasket is provided between the upper end cover 11 and the housing 1 and between the lower end cover 12 and the housing 1. The upper end cover 11 and the lower end cover 12 are made of 304 stainless steel.

[0035] Based on the above embodiments, the driving impeller 43 is a three-impeller, the material of the driving impeller 43 is 304 stainless steel, and the end face and outer wall of the filter cartridge body 41 are provided with filter screens, which are 100-150 mesh filter screens.

[0036] In some embodiments, the space between the bottom of the filter cartridge body 41 and the lower end cover 12 is a collection chamber. The inlet pipe 2 and the outlet pipe 3 are both inclinedly arranged on the housing 1 so that when the inlet pipe 2 and the outlet pipe 3 are vertically and horizontally connected to the conveying medium pipeline, the housing 1 is in an inclined state. At this time, the height of the upper end cover 11 is greater than the height of the lower end cover 12, so that the impurities in the filter cartridge body 41 can fall into the collection chamber. In order to facilitate the impurities in the filter cartridge body 41 to fall into the collection chamber, a drain port is provided at the bottom of the filter cartridge body 41. Specifically, the inlet pipe 2, the outlet pipe 3 and the housing 1 are designed as an integral unit.

[0037] In other words, by setting both the inlet pipe 2 and the outlet pipe 3 at an angle on the housing 1, the housing 1 is in an inclined state when both the inlet pipe 2 and the outlet pipe 3 are vertically and horizontally connected to the conveying medium pipeline. This allows particulate impurities such as mud and sand in the filter cartridge body 41 to flow into the collection chamber, preventing excessive accumulation of particulate impurities such as mud and sand from clogging the filter screen and affecting the working performance of the filter.

[0038] Based on the above embodiments, both the inlet pipe 2 and the outlet pipe 3 are provided with flange seats for connecting the conveying medium pipeline at their ends, and the inlet pipe 2 and the outlet pipe 3 are arranged on opposite sides, that is, the inlet pipe 2 and the outlet pipe 3 are arranged on different sides of the housing 1. The angle between the extension direction of the inlet pipe 2 and the direction of the housing 1 toward the upper end cover 11 is an acute angle, and the angle between the extension direction of the outlet pipe 3 and the direction of the housing 1 toward the upper end cover 11 is an obtuse angle, thereby forming an overall H-shaped filter.

[0039] Based on the above embodiments, the support device 44 includes a lower bearing bracket 441, a lower bearing 442, and an upper bearing 443. The upper bearing 443 is fixed inside the upper end cover 11, the lower bearing bracket 441 is fixed to the inner wall of the housing 1, and the lower bearing bracket 441 has a certain gap from the lower end cover 12. The lower bearing 442 is fixed on the center line of the lower bearing bracket 441. The center lines of the upper bearing 443 and the lower bearing 442 are on the same straight line. One end of the rotating shaft 42 is connected to the upper bearing 443, and the other end of the rotating shaft 42 is connected to the lower bearing 442.

[0040] Based on the above embodiments, both the lower bearing 442 and the upper bearing 443 are selected as ceramic bearings, more specifically ceramic double-sealed ball bearings, which can reduce the frictional resistance of the shaft 42, provide a certain degree of corrosion resistance, improve the service life of the lower bearing 442 and the upper bearing 443, and reduce the number of maintenance times.

[0041] Based on the above embodiments, the lower bearing bracket 441 is an annular bracket, and the lower bearing bracket 441 is provided with a bearing mounting groove and a through hole. The housing 1 is provided with a step for placing the lower bearing bracket 441 so that the circumferential surface of the lower bearing bracket 441 is in contact with the inner wall of the housing 1. The outer diameter of the filter cartridge body 41 is smaller than the inner diameter of the housing 1. An annular sealing brush 45 is provided at the bottom edge of the filter cartridge body 41, and the circumferential surface of the annular sealing brush 45 is in contact with the inner wall of the lower bearing bracket 441.

[0042] In other words, since the outer diameter of the filter cartridge body 41 is smaller than the inner diameter of the housing 1, it is easier for the filter cartridge body 41 to rotate inside the housing 1. An annular sealing brush 45 is provided at the bottom edge of the filter cartridge body 41, and the circumferential surface of the annular sealing brush 45 is attached to the inner wall of the lower bearing bracket 441. The circumferential surface of the lower bearing bracket 441 is attached to the inner wall of the housing 1, thereby ensuring that the medium flowing into the water inlet pipe 2 is filtered through the inside of the filter cartridge body 41 and discharged through the water outlet pipe, thus improving the water purification quality of the filter. The through hole provided on the lower bearing bracket 441 facilitates the flow of the medium flowing into the water inlet pipe 2 into the filter cartridge body 41.

[0043] In some embodiments, the upper end cover 11 is axially provided with an outer wall flushing valve 111 and an inner wall flushing valve 112, and the lower end cover 12 is axially provided with a drain valve 121. The outer wall flushing valve 111, the inner wall flushing valve 112 and the drain valve 121 are all connected to the housing 1. One end of the rotating shaft 42 extends in the direction toward the upper end cover 11 until it is connected to the inner wall flushing valve 112. The rotating shaft 42 is a hollow rotating shaft and the circumferential surface of the rotating shaft 42 is provided with uniformly arranged spray holes 421.

[0044] In other words, a hollow pipe is provided on the center line of the rotating shaft 42, and uniformly arranged spray holes 421 are provided on the circumferential surface of the rotating shaft 42. The spray holes 421 are connected to the hollow pipe and are connected to the inner wall flushing valve 112 through one end of the rotating shaft 42. The inner wall flushing valve 112 is connected to a high-pressure water pipe. When the inner wall flushing valve 112 is opened, the spray holes 421 on the rotating shaft 42 spray high-pressure water onto the filter cartridge body 41 to flush the inner wall of the filter screen, preventing mud and other particulate matter from clogging the filter screen and reducing the rotational resistance of the filter cartridge body 41. The outer wall flushing valve 111 is connected to the high-pressure water pipe. When the outer wall flushing valve is opened... The filter screen outer wall is flushed. During flushing, the drain valve 121 is opened to discharge particulate impurities such as mud and sand. When flushing the inner and outer walls of the filter screen, the media conveying pipeline is stopped. That is, the media conveying pipeline connected to the inlet pipe 2 is equipped with an inlet valve, and the media conveying pipeline connected to the outlet pipe 3 is equipped with an outlet valve. The inlet valve and outlet valve are closed. When flushing the inner and outer walls of the filter screen, the inner wall or the outer wall can be flushed separately, or the outer wall and the inner wall can be flushed simultaneously. When the filter is working normally, the outer wall flushing valve 111, the inner wall flushing valve 112 and the drain valve 121 are all in the closed state.

[0045] Based on the above embodiment, both the inlet pipe 2 and the outlet pipe 3 are connected to pressure gauges. By observing the difference between the pressure gauges in the inlet pipe and the outlet pipe, it is possible to choose whether to clean the filter screen.

[0046] In some embodiments, the inlet valve of the medium conveying pipeline is closed, the outlet valve of the medium conveying pipeline is open, the outer wall flushing valve 111 and the inner wall flushing valve 112 are closed, and the drain valve 121 is opened, so that the medium in the outlet pipe 3 flows back into the filter, thereby cleaning the filter cartridge body 41.

[0047] In some embodiments, the filter further includes a main drive device 5. The main drive device 5 enables the filter cartridge assembly 4 to rotate within the housing 1 when it is being rinsed, thereby improving the cleaning efficiency of the filter cartridge body 41. The main drive device 5 includes a drive rod 51, which is axially inserted into the upper end cover 11. A main gear 52 is connected to the drive rod 51 located within the housing 1. A driven gear 53 is fixed on the rotating shaft 42. The main gear 52 and the driven gear 53 mesh with each other. A handle is provided at the end of the drive rod 51, which enables the drive rod 51 to rotate. The drive rod 51 drives the main gear 52 to rotate. Since the main gear 52 and the driven gear 53 mesh with each other, the driven gear 53 rotates. Since the driven gear 53 is fixed on the rotating shaft 42, the filter cartridge assembly 4 can rotate within the housing 1. When rinsing the inner and outer walls of the filter cartridge body 41, the filter cartridge assembly 4 rotates within the housing 1, effectively improving the cleaning effect of the inner and outer walls of the filter cartridge body 41.

[0048] Based on the above embodiments, the drive rod 51 can move axially within the upper end cover 11. That is, the upper end cover 11 is provided with a through mounting hole in the axial direction. The drive rod 51 is inserted into the mounting hole. The meshing or separation between the main gear 52 and the driven gear 53 is realized by the axial movement of the drive rod 51. A limiting member 54 and a sealing gasket 55 are fixed on the drive rod 51. The limiting member 54 is located on the drive rod 51 outside the upper end cover 11. The sealing gasket 55 is attached to the upper surface of the main gear 52. The drive rod 51 located inside the housing 1 is provided with an external thread. The external thread is located above the sealing gasket 55. Therefore, when the main gear 52 and the driven gear 53 are separated, the external thread of the drive rod 51 is connected to the internal thread of the mounting hole.

[0049] In other words, when rinsing the inner and / or outer walls of the filter cartridge body 41, the drive rod 51 is moved in a direction close to the filter cartridge body 41 until the limiting member 54 contacts the upper surface of the upper end cover 11, at which point the axial movement of the drive rod 51 stops. At this time, the main gear 52 and the driven gear 53 are in a fully meshed state, as shown in the attached instruction manual. Figure 2As shown; if the driven gear 53 interferes with the movement of the drive rod 51 during its movement, rotate the drive rod 51 until the driven gear 53 no longer interferes with its movement; after the inner and / or outer walls of the filter cartridge body 41 have been rinsed, move the drive rod 51 away from the filter cartridge body 41 until the sealing gasket 55 adheres to the lower surface of the upper end cover 11, then stop the movement of the drive rod 51. At this point, the main gear 52 and the driven gear 53 are completely separated, as shown in the attached instruction manual. Figure 3 As shown, when the filter provided in this application is working, the load caused by the rotation of the filter cartridge body 41 by the main drive device 5 is reduced; since the inner wall of the mounting hole at the bottom of the upper end cover 11 has an internal thread, the drive rod 51 is connected to the internal thread of the upper end cover 11 through the external thread, which plays a fixing role and prevents the drive rod 51 from sliding down.

[0050] Based on the above embodiments, when the main gear 52 and the driven gear 53 are fully engaged, the distance between the sealing gasket 55 and the inner wall of the upper cover 11 is greater than the thickness of the main gear 52. This ensures that after the inner wall and / or outer wall of the filter cartridge body 41 are rinsed, the drive rod 51 moves away from the filter cartridge body 41. When the sealing gasket 55 is attached to the inner wall of the upper cover 11, the movement of the drive rod 51 stops, and the main gear 52 and the driven gear 53 are completely separated.

[0051] Based on the above embodiments, the limiting member 54 is a snap ring, the sealing gasket 55 is an annular sealing gasket, and the outer diameter of the sealing gasket 55 is larger than the diameter of the mounting hole. When the main gear 52 and the driven gear 53 are completely separated, the sealing gasket 55 adheres to the lower surface of the upper end cover 11 to achieve a seal between the upper end cover 11 and the drive rod 51. In order to facilitate the rotation of the drive rod 51 in the mounting hole, the drive rod 51 and the upper end cover 11 are clearance fit.

[0052] Based on the above embodiments, the connection between the main gear 52 and the drive rod 51 is either a detachable connection or a fixed connection. Specifically, the detachable connection is a threaded connection. In order to prevent the main gear 52 from shifting on the drive rod 51, a sealing gasket 55 located at the upper end of the main gear 52 is bonded to the drive rod 51, and a limiting screw is provided below the main gear 52. This limiting screw is threaded onto the lower surface of the drive rod 51, thereby ensuring that the main gear 52 is always located on the drive rod 51. The fixed connection is that the main gear 52 is welded to the drive rod 51.

[0053] Based on the above embodiments, an O-ring 56 and a pressure cap 57 are fixed on the upper surface of the upper end cover 11. The pressure cap 57 presses the upper end of the O-ring 56 tightly, and the inner wall of the O-ring 56 is in close contact with the outer surface of the drive rod 51.

[0054] In other words, an O-ring 56 and a pressure cap 57 are provided on the upper surface of the mounting hole of the upper end cover 11. The pressure cap 57 is pressed against the upper end of the O-ring 56 and is fixedly connected to the upper end cover 11. The O-ring 56 is used to achieve the seal between the upper end cover 11 and the drive rod 51. Based on the fact that the number of O-rings 56 in this embodiment is too small, it will not affect the axial movement or rotation of the drive rod 51.

[0055] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from another, and do not necessarily require or imply any such actual relationship or order between these entities.

[0056] The filter provided by this invention has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of this invention. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this invention.

Claims

1. A filter, characterized in that, include: The shell (1) is a hollow column. The two ends of the shell (1) are detachably connected with an upper end cover (11) and a lower end cover (12). One end of the shell (1) is provided with a water inlet, and the other end of the shell (1) is provided with a water outlet. The inlet pipe (2) and the outlet pipe (3) are connected to the inlet and the outlet respectively. The filter cartridge assembly (4) is located inside the housing (1). The filter cartridge assembly (4) includes a filter cartridge body (41) and a rotating shaft (42). The rotating shaft (42) is axially inserted into and fixed on the filter cartridge body (41). A drive impeller (43) is fixed on the rotating shaft (42). The drive impeller (43) and the filter cartridge body (41) are both located between the inlet and the outlet. The rotating shaft (42) is rotatably connected to the housing (1) through a support device (44) so ​​that the filter cartridge assembly (4) can rotate inside the housing (1).

2. The filter according to claim 1, characterized in that, The space between the bottom of the filter cartridge body (41) and the lower end cover (12) serves as a collection chamber. The bottom of the filter cartridge body (41) is provided with a drain port. The water inlet pipe (2) and the water outlet pipe (3) are both inclinedly arranged on the housing (1) so that when the water inlet pipe (2) and the water outlet pipe (3) are vertically and horizontally connected to the conveying medium pipeline, the housing (1) is in an inclined state, so that the impurities in the filter cartridge body (41) flow from the drain port into the collection chamber.

3. The filter according to claim 2, characterized in that, Both the inlet pipe (2) and the outlet pipe (3) are provided with flange seats for connecting the conveying medium pipeline. The angle between the extension direction of the inlet pipe (2) and the direction of the housing (1) toward the upper end cover (11) is an acute angle, and the angle between the extension direction of the outlet pipe (3) and the direction of the housing (1) toward the upper end cover (11) is an obtuse angle.

4. The filter according to claim 3, characterized in that, The support device (44) includes a lower bearing bracket (441), a lower bearing (442) and an upper bearing (443). The upper bearing (443) is fixed inside the upper end cover (11). The lower bearing bracket (441) is fixed inside the housing (1). The lower bearing (442) is installed on the axis of the lower bearing bracket (441). One end of the rotating shaft (42) is connected to the upper bearing (443), and the other end of the rotating shaft (42) is connected to the lower bearing (442).

5. The filter according to claim 4, characterized in that, The outer diameter of the filter cartridge body (41) is smaller than the inner diameter of the housing (1). An annular sealing brush (45) is provided at the bottom of the filter cartridge body (41), and the circumferential surface of the annular sealing brush (45) is attached to the inner wall of the bearing bracket (441).

6. The filter according to any one of claims 2-5, characterized in that, The upper end cover (11) is axially provided with an outer wall flushing valve (111) and an inner wall flushing valve (112), and the lower end cover (12) is axially provided with a drain valve (121). The outer wall flushing valve (111), the inner wall flushing valve (112) and the drain valve (121) are all connected to the housing (1). One end of the rotating shaft (42) extends toward the upper end cover (11) until it is connected to the inner wall flushing valve (112). The rotating shaft (42) is a hollow rotating shaft and the circumferential surface of the rotating shaft (42) is provided with uniformly arranged spray holes (421).

7. The filter according to claim 6, characterized in that, It also includes a main drive device (5), which includes a drive rod (51) that is axially inserted into the upper end cover (11). A main gear (52) is fixed on the drive rod (51) located inside the housing (1), and a driven gear (53) is fixed on the rotating shaft (42). The main gear (52) and the driven gear (53) mesh with each other. The rotation of the drive rod (51) enables the filter cartridge assembly (4) to rotate inside the housing (1).

8. The filter according to claim 7, characterized in that, The drive rod (51) can move axially within the upper end cover (11), and the meshing or disengagement between the main gear (52) and the driven gear (53) is achieved by the axial movement of the drive rod (51).

9. The filter according to claim 8, characterized in that, A limiting member (54) and a sealing gasket (55) are fixed on the drive rod (51). The limiting member (54) is located on the drive rod (51) outside the upper end cover (11), and the sealing gasket (55) is attached to the upper surface of the main gear (52).

10. The filter according to claim 9, characterized in that, The upper surface of the upper end cover (11) is fixed with an O-ring (56) and a pressure cap (57). The pressure cap (57) fits against the upper surface of the O-ring (56), and the inner wall of the O-ring (56) fits tightly against the outer surface of the drive rod (51).

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