Multifunctional water treatment filtering device

Abstract

The utility model relates to a multifunctional water treatment filtering device which comprises a valve body and a movable valve plate, the valve body is provided with a water inlet, a water outlet, a first drain outlet and a second drain outlet, and the valve body is provided with a valve outer cavity, a valve inner cavity, a first filter element connector and a second filter element connector which are coaxially arranged; three valve body partition plates are arranged in the valve inner cavity, every two valve body partition plates form an included angle of 120 degrees, so that the valve inner cavity is divided into a working cavity, a backwashing cavity and a forward washing cavity which are arranged in the circumferential direction and are equal in horizontal section area; the movable valve plate comprises a first column section and a second column section which are coaxial and connected together, the first column section is provided with a water inlet through hole, a first blind groove and a second blind groove, the horizontal section area of the water inlet through hole is equal to the horizontal section area of the working cavity, the horizontal section area of the backwashing cavity and the horizontal section area of the forward washing cavity, and the second column section is arranged outside the cavity wall of the valve inner cavity in a sleeving mode and makes sealing contact with the cavity wall of the valve inner cavity.

Description

Technical Field

[0001] This utility model belongs to the technical field of water treatment equipment and relates to a multifunctional water treatment filtration device. Background Technology

[0002] Existing water treatment filtration devices often use planar control valves, which are installed after the corresponding treatment tank during use and can switch the flow channels to realize the functions of filtration, backwashing, and forward washing of the filtration system.

[0003] Patent CN218031518U discloses a multifunctional filter valve for water treatment, comprising a valve body, a moving valve plate, a fixed valve plate, and a drive device. The valve body has an inlet, an outlet, and a drain on its side wall. The valve body contains an inner chamber and an outer chamber. The outlet requires connection to an electric stop valve during use. The inner chamber of the valve body includes a central drain chamber and a working chamber, a backwash chamber, and a forward wash chamber located on the outer circumference of the central drain chamber. By driving the moving valve plate to rotate at a corresponding angle, the filter valve can perform normal filtration, backwashing, and forward washing functions. However, while achieving these functions, an external electric valve is required at the outlet, increasing operating costs. Furthermore, although the moving valve plate and the inner chamber of the valve body are designed based on a three-part division, the effective drainage area of ​​the entire valve body is actually smaller than the cross-sectional area of ​​any one of the working chamber, backwash chamber, or forward wash chamber due to the presence of the central drain chamber and the corresponding valve plate partition beam.

[0004] In addition, patent application CN114517842A discloses a multi-functional water treatment filter valve. The valve body and moving valve plate of the multi-functional water treatment filter valve are also based on a three-compartment structure. However, the sum of the effective sewage discharge water passage area and the effective positive washing water passage area of ​​the valve body is not greater than the effective water passage area of ​​the inlet or outlet part.

[0005] Based on the existing publicly available filtration device structures, either the effective utilization area ratio of the inlet, outlet, and drainage sections is too low, or the effective utilization area ratio of the inlet and outlet sections is high while the effective utilization area ratio of the drainage section is low. These structures cannot achieve efficient allocation and cannot make the utilization area of ​​the inlet, outlet, and drainage sections highly efficient. Utility Model Content

[0006] Therefore, the purpose of this utility model is to provide a multifunctional water treatment filtration device to solve the technical problem that existing water treatment filtration devices have high operating costs and cannot efficiently allocate the effective usable area of ​​the inlet, outlet and sewage discharge sections.

[0007] To solve the above problems, the multifunctional water treatment filtration device provided by this utility model adopts the following technical solution:

[0008] A multi-functional water treatment filtration device includes a valve body and a movable valve plate rotatably mounted in the valve body. The valve body is provided with an inlet and an outlet. The valve body has a valve outer cavity, a valve inner cavity, a first filter element interface and a second filter element interface arranged coaxially. The first filter element interface is used to communicate with the filter tank and the second filter element interface is used to communicate with the central pipe.

[0009] The valve body is also provided with a first drain port and a second drain port, and the first drain port, the second drain port, the inlet and the outlet are all connected to the outer cavity of the valve.

[0010] The valve cavity is provided with three valve body partitions arranged in pairs at 120° angles and connected together to divide the valve cavity into a working chamber, a backwash chamber and a forward wash chamber arranged in the circumferential direction with equal horizontal cross-sectional areas. The forward wash chamber and the working chamber are connected to the first filter element interface, and the backwash chamber is connected to the second filter element interface. The backwash chamber is close to the first drain outlet, and the backwash chamber wall is provided with a communication port that connects to the valve cavity at the position corresponding to the water outlet.

[0011] The moving valve plate includes a first column segment and a second column segment arranged coaxially and connected together. The first column segment is located inside the second column segment and is sealed to the upper end face of the valve cavity. The first column segment has a water inlet hole, a first blind groove, and a second blind groove arranged in the circumferential direction with a horizontal cross-sectional area equal to that of the working chamber, the backwash chamber, and the forward wash chamber. The water inlet hole communicates with the valve outer cavity. The first column segment is also provided with a first water outlet communicating with the first blind groove. The second column segment is sleeved outside the cavity wall of the valve cavity and is in sealed contact with the cavity wall of the valve cavity. The second column segment is provided with a second water outlet for connecting the water outlet with the backwash chamber.

[0012] An annular sealing ring is embedded at one end of the water outlet near the outer cavity of the valve, and at one end of the first drain outlet and the second drain outlet near the outer cavity of the valve.

[0013] During the rotation stroke of the moving valve plate, when the first column section blocks the first and second drain ports and the second column section connects the water flow path between the outlet and the backwash chamber, the valve body is in the filtration working state; when the first column section connects the first drain port to the first blind tank and blocks the second drain port, and the second column section disconnects the water flow path between the outlet and the backwash chamber, the valve body is in the backwash state; when the first column section connects the second drain port to the first blind tank and blocks the first drain port, and the second column section disconnects the water flow path between the outlet and the backwash chamber, the valve body is in the forward washing state.

[0014] Preferably, the moving valve plate is an integral structure, with the first column segment and the second column segment being integrally formed.

[0015] Furthermore, a fixed valve plate is snapped onto the upper end face of the valve cavity. The outer circumferential surface of the fixed valve plate is in sealing contact with the second column section, and the upper surface of the fixed valve plate is in sealing contact with the first column section. The fixed valve plate is provided with working through holes, backwash through holes, and forward wash through holes arranged in the circumferential direction and corresponding one-to-one with the working chamber, backwash chamber, and forward wash chamber. The horizontal cross-sectional areas of the working through holes, backwash through holes, and forward wash through holes are all equal, and are all equal to the horizontal cross-sectional area of ​​the working chamber.

[0016] Furthermore, elastic mounting members are embedded at the end of the water outlet near the outer cavity of the valve, and at the end of the first drain outlet and the second drain outlet near the outer cavity of the valve. The elastic mounting members are provided with water flow holes, and the annular sealing ring is installed on the corresponding elastic mounting members.

[0017] Furthermore, the first drain port and the second drain port are symmetrically arranged on both sides of the valve body, and the axis of the first drain port coincides with the axis of the second drain port.

[0018] Furthermore, the inlet and outlet are symmetrically arranged on both sides of the valve body, with the axis of the inlet coinciding with the axis of the outlet. The inlet and the first drain outlet are located on the same side of the valve body, and the outlet and the second drain outlet are located on the same side of the valve body.

[0019] The beneficial effects of this utility model are:

[0020] 1. This utility model can isolate and connect the water flow path between the outlet and the backwash chamber by rotating the moving valve plate itself, eliminating the need for an external electric valve at the outlet and reducing the cost of use.

[0021] 2. The valve body of this utility model does not have a drain chamber, making it a true three-compartment structure. Under the premise of satisfying normal filtration, backwashing, and forward washing functions, it maximizes the water flow area of ​​the working chamber, backwashing chamber, and forward washing chamber. The effective water flow area of ​​the inlet, outlet, and drain sections is the same, maximizing the water flow rate. Compared with the prior art, this utility model has a simpler structure, and under the condition of achieving the same filtration capacity, it has a smaller manufacturing volume and lower manufacturing cost.

[0022] 3. The annular sealing ring in this utility model is installed on an elastic mounting component. Even if wear occurs after long-term use, the elastic mounting component can compensate for the gap caused by wear under its own elastic force, so that the annular sealing ring at the corresponding position can always maintain a sealing contact with the moving valve plate, thereby improving service life and reducing replacement frequency.

[0023] 4. In this utility model, the first and second drain outlets are located on both sides of the valve body, and the inlet and outlet are also located on both sides of the valve body, so that there is sufficient space around the valve body to connect the corresponding pipes, thereby improving the convenience of installation.

[0024] 5. In the filtration state, the working chamber and the forward washing chamber can be filled with water at the same time, so that the annular first filter element interface can be fully utilized. Attached Figure Description

[0025] The above and other objects, features, and advantages of the present invention will become readily understood by reading the following detailed description of exemplary embodiments with reference to the accompanying drawings. In the drawings, several embodiments of the present invention are shown by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0026] Figure 1 This is a three-dimensional structural diagram of the multifunctional water treatment filtration device of this utility model. Figure 1 ;

[0027] Figure 2 This is a three-dimensional structural diagram of the multifunctional water treatment filtration device of this utility model. Figure 2 (Display driver);

[0028] Figure 3 This is a three-dimensional structural diagram of the valve body in the multifunctional water treatment filtration device of this utility model. Figure 1 ;

[0029] Figure 4 This is a three-dimensional structural diagram of the valve body in the multifunctional water treatment filtration device of this utility model. Figure 2 ;

[0030] Figure 5 This is a top view of the valve body in the multifunctional water treatment filtration device of this utility model;

[0031] Figure 6 This is a bottom view of the valve body in the multifunctional water treatment filtration device of this utility model;

[0032] Figure 7 This is a schematic diagram of the structure of the fixed valve plate in the multifunctional water treatment filtration device of this utility model;

[0033] Figure 8 This is a three-dimensional schematic diagram of the moving valve plate in the multifunctional water treatment filtration device of this utility model from two different perspectives.

[0034] Figure 9 This is a bottom view of the moving valve plate;

[0035] Figure 10 This is a schematic diagram of the multifunctional water treatment filtration device of this utility model in the filtration state.

[0036] Figure 11 for Figure 10 Cross-section Figure 1 ;

[0037] Figure 12 for Figure 10 Cross-section Figure 2 ;

[0038] Figure 13 This is a schematic diagram of the multifunctional water treatment filtration device of this utility model in the backwashing state.

[0039] Figure 14 for Figure 13 Cross-section Figure 1 ;

[0040] Figure 15 for Figure 13 Cross-section Figure 2 ;

[0041] Figure 16 This is a schematic diagram of the multifunctional water treatment filtration device of this utility model in the forward washing state;

[0042] Figure 17 for Figure 16 Cross-section Figure 1 ;

[0043] Figure 18 for Figure 16 Cross-section Figure 2 .

[0044] Explanation of reference numerals in the attached figures:

[0045] 1. Valve body; 2. Inlet; 3. Outlet; 4. First drain port; 5. Second drain port; 6. Valve outer cavity; 7. Backwash chamber; 8. Working chamber; 9. Forward wash chamber; 10. First filter element interface; 11. Second filter element interface; 12. Fixed valve plate; 13. Moving valve plate; 14. Working through hole; 15. Backwash through hole; 16. Forward wash through hole; 17. Fixed valve plate partition beam; 18. Fixed valve plate ring beam; 19. Valve body partition plate; 20. Moving valve plate partition plate; 21. Moving... 21. Valve plate blind plate; 22. First column section; 23. Second column section; 24. Water inlet hole; 25. First blind groove; 26. Second blind groove; 27. First water outlet; 28. Second water outlet; 29. ​​Drive device; 30. Display screen; 31. First sealing ring; 32. Second sealing ring; 33. Third sealing ring; 34. Fourth sealing ring; 35. First elastic mounting component; 36. Second elastic mounting component; 37. Third elastic mounting component; 38. Connecting port. Detailed Implementation

[0046] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments disclosed. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0047] The principles and spirit of this utility model will be explained in detail below with reference to several representative embodiments.

[0048] Example 1 of the multifunctional water treatment filtration device provided by this utility model:

[0049] like Figure 1 , Figure 2 and Figure 12 As shown, the multifunctional water treatment filtration device includes a valve body 1, a fixed valve plate 12 fixed in the valve body 1, a movable valve plate 13 that rotates and seals with the fixed valve plate 12, a display screen 30 mounted on the valve body 1, and a drive device 29 mounted on the valve body 1.

[0050] Among them, valve body 1 is formed by injection molding, such as Figure 5 As shown, the valve body 1 has an external valve cavity 6 and an internal valve cavity arranged coaxially, such as... Figure 6 As shown, the bottom of the valve body 1 is also provided with a first filter element interface 10 and a second filter element interface 11 arranged coaxially with the valve cavity. The first filter element interface 10 is used to communicate with the filter tank, and the second filter element interface 11 is used to communicate with the central tube. Figure 3 As shown, the valve body 1 has an inlet 2, an outlet 3, a first drain outlet 4, and a second drain outlet 5 on its side wall. All three outlets (inlet 2, outlet 3, first drain outlet 4, and second drain outlet 5) are connected to the valve's outer cavity 6. The first drain outlet 4 and the second drain outlet 5 are symmetrically arranged on both sides of the valve body 1, with the axis of the first drain outlet 4 coinciding with the axis of the second drain outlet 5. The inlet 2 and the first drain outlet 4 are located on the same side of the valve body 1, with the inlet 2 located below the first drain outlet 4. The outlet 3 and the second drain outlet 5 are located on the other side of the valve body 1, with the outlet 3 located below the second drain outlet 5. The inlet 2 and the outlet 3 are also symmetrically arranged about the valve body 1, with the axis of the inlet 2 coinciding with the axis of the outlet 3.

[0051] In this embodiment, as Figure 3 and Figure 4As shown, a first elastic mounting member 35 is embedded at the end of the first drain outlet 4 near the outer cavity 6 of the valve; a second elastic mounting member 36 is embedded at the end of the second drain outlet 5 near the outer cavity 6 of the valve; and a third elastic mounting member 37 is embedded at the end of the outlet 3 near the outer cavity 6 of the valve. The first elastic mounting member 35, the second elastic mounting member 36, and the third elastic mounting member 37 are all T-shaped structures with internal water flow holes. One end of the first elastic mounting member 35 extends into the outer cavity 6 of the valve, and a first sealing ring 31 is embedded therein; one end of the second elastic mounting member 36 extends into the outer cavity 6 of the valve, and a second sealing ring 32 is embedded therein; one end of the third elastic mounting member 37 also extends into the outer cavity 6 of the valve, and a third sealing ring 33 is embedded therein. The first sealing ring 31, the second sealing ring 32, and the third sealing ring 33 are all annular sealing rings.

[0052] like Figure 5 As shown, three valve body partitions 19 are integrally formed in the valve cavity. Any two adjacent valve body partitions 19 are arranged at a 120° angle. The three valve body partitions 19 intersect and connect together, with an upward protrusion at the intersection. The three valve body partitions 19 divide the valve cavity into three circumferentially arranged chambers: a working chamber 8, a backwash chamber 7, and a forward wash chamber 9, each with a central angle of 120° and equal horizontal cross-sectional area. The forward wash chamber 9 and the working chamber 8 are both connected to the first filter element interface 10. The backwash chamber 7 is connected to the second filter element interface 11. The backwash chamber 7 is located near the first drain port 4, and... Figure 3 As shown, the backwash chamber 7 has a connecting port 38 on the wall corresponding to the outlet 3, which communicates with the valve outer chamber 6. A fourth sealing ring 34 is provided at the connecting port 38, and the fourth sealing ring 34 is also an annular sealing ring.

[0053] The fixed valve plate 12 is a one-piece structure, such as Figure 7 As shown, the system includes a fixed valve plate ring beam 18 and three fixed valve plate partition beams 17 located within the fixed valve plate ring beam 18, which are connected together at 120° angles to each other. The three fixed valve plate partition beams 17 have holes at their intersections for fitting onto the aforementioned protrusions. The fixed valve plate 12 is fixed to the upper end face of the valve cavity through these holes. The three fixed valve plate partition beams 17 divide the space within the fixed valve plate ring beam 18 into three circumferentially arranged through-holes: a working through-hole 14, a backwash through-hole 15, and a forward wash through-hole 16, all with a central angle of 120°. The horizontal cross-sectional areas of the working through-hole 14, backwash through-hole 15, and forward wash through-hole 16 are all equal and equal to the horizontal cross-sectional area of ​​the working chamber 8. After the fixed valve plate 12 is installed, the working through-hole 14 corresponds vertically to the working chamber 8, the backwash through-hole 15 corresponds vertically to the backwash chamber 7, and the forward wash through-hole 16 corresponds vertically to the forward wash chamber 9.

[0054] The moving valve plate 13 is a one-piece structure, such as Figure 8 and Figure 9As shown, the device includes an integrally formed first column segment 22 and a second column segment 23. The first column segment 22 is located inside the second column segment 23, and the outer diameter of the first column segment 22 is equal to the inner diameter of the second column segment 23. The first column segment 22 has three movable valve plate partitions 20 connected together at 120° angles to each other, and a movable valve plate blind plate 21 connected above the three movable valve plate partitions 20. The movable valve plate blind plate 21 is an arc-shaped plate with a central angle of 240°. Within the first column segment 22, water inlet holes 24, a first blind groove 25, and a second blind groove 26 are formed, arranged circumferentially with equal horizontal cross-sectional areas. The horizontal cross-sectional areas of the water inlet holes 24, the first blind groove 25, and the second blind groove 26 are equal to the horizontal cross-sectional area of ​​the working chamber 8. The water inlet holes 24 communicate with the valve outer cavity 6, and the first column segment 22 also has a first water outlet 27 communicating with the first blind groove 25. During installation, as... Figure 12 As shown, the movable valve plate 13 and the fixed valve plate 12 are arranged coaxially. The lower end face of the first column section 22 is in sealing contact with the upper end face of the fixed valve plate 12. The second column section 23 is sleeved outside the cavity wall of the valve cavity and is in sealing contact with the cavity wall of the valve cavity. At this time, the fixed valve plate 12 is located inside the second column section 23, and the second column section 23 is also in sealing contact with the outer circumferential surface of the fixed valve plate 12. The interior of the second column section 23 is a cavity, and a second water outlet 28 is provided on the second column section 23. The second water outlet 28 can connect the water passage between the water outlet 3 and the backwash chamber 7.

[0055] When the moving valve plate 13 rotates within the valve body 1, the outer wall of the first column section 22 is in frictional contact with the first sealing ring 31 and the second sealing ring 32, the outer wall of the second column section 23 is in frictional contact with the third sealing ring 33, and the inner wall of the second column section 23 is in frictional contact with the fourth sealing ring 34. The fixed valve plate 12 can provide lubrication, reducing the wear of the moving valve plate 13.

[0056] The drive unit 29 is existing technology, mainly composed of a motor, transmission gears, and transmission rods, and will not be described in detail here. The drive unit 29 drives the movable valve plate 13 to rotate counterclockwise, which can realize the filtration, backwashing, and forward washing functions of the valve body 1. By rotating the movable valve plate 13 itself, the water flow path between the outlet 3 and the backwash chamber 7 can be isolated and connected, eliminating the need for an external electric valve at the outlet 3 and reducing operating costs.

[0057] The various operating states of valve body 1 are as follows:

[0058] like Figure 10 , Figure 11 and Figure 12As shown, valve body 1 is in the filtration working state. At this time, the first column section 22 blocks the first drain port 4 and the second drain port 5, and the second water outlet 28 on the second column section 23 is opposite to and connected to the outlet 3 and the connecting port 38. The first blind groove 25 blocks the forward washing chamber 9, and the second blind groove 26 blocks the backwash chamber 7. At this time, the raw water flows into the valve outer cavity 6 from the inlet 2. Part of it flows into the working through hole 14 and the working chamber 8 through the inlet hole 24 of the driven valve plate 13, and flows into the filter tank along the first filter element interface 10. Part of it flows into the first blind groove 25 from the first water outlet 27, and flows into the filter tank from the first filter element interface 10 along the forward washing through hole 16 and the forward washing chamber 9. After the raw water is filtered in the filter tank, it flows out from the central pipe, enters the backwash chamber 7 along the second filter element interface 11, and flows to the outlet 3 along the connecting port 38 and the second water outlet 28.

[0059] After the drive device 29 drives the valve plate 13 to rotate 120° counterclockwise compared to its position in the filtration state, the valve body 1 enters the backwash state, such as... Figure 13 , Figure 14 and Figure 15 As shown. At this time, the first column section 22 blocks the first drain outlet 4, the second column section 23 cuts off the water flow path between the outlet 3 and the connecting port 38, the first water outlet 27 is connected to the second drain outlet 5, the first blind groove 25 blocks the working chamber 8, the second blind groove 26 blocks the forward washing chamber 9, the water inlet hole 24 is connected to the backwash chamber 7, and the second water outlet 28 is blocked by the cavity wall of the valve. At this time, the flow path of the raw water is: water inlet 2 → valve outer cavity 6 → water inlet hole 24 → backwash hole 15 → backwash chamber 7 → second filter element interface 11 → central pipe → filter tank → first filter element interface 10 → working chamber 8 → working hole 14 → first blind groove 25 → first water outlet 27 → second drain outlet 5.

[0060] After the drive device 29 drives the valve plate 13 to rotate 240° counterclockwise compared to its position in the filtration state, the valve body 1 enters the forward rinsing state, such as... Figure 16 , Figure 17 and Figure 18 As shown. At this time, the first column section 22 blocks the second drain outlet 5, the second column section 23 cuts off the water flow path between the outlet 3 and the connecting port 38, the first water outlet 27 is connected to the first drain outlet 4, the first blind groove 25 blocks the backwash chamber 7, the second blind groove 26 blocks the working chamber 8, the water inlet hole 24 is connected to the forward washing chamber 9, and the second water outlet 28 is blocked by the cavity wall of the valve. At this time, the flow path of the raw water is: water inlet 2 → valve outer cavity 6 → water inlet hole 24 → forward washing hole 16 → forward washing chamber 9 → first filter element interface 10 → filter tank → central pipe → second filter element interface 11 → backwash chamber 7 → backwash hole 15 → first blind groove 25 → first water outlet 27 → first drain outlet 4.

[0061] Under its specific operating conditions, the multifunctional water treatment filtration device of this invention can divide the effective water flow area of ​​the valve cavity into three equal parts, so that the water flow rate of the inlet, outlet and sewage discharge parts is the same. This is a function that previous water treatment filtration devices of the same type did not have and could not achieve.

[0062] Example 2 of the multifunctional water treatment filtration device provided by this utility model:

[0063] The main difference between this embodiment and Embodiment 1 is that in Embodiment 1, the moving valve plate is an integral structure. In this embodiment, the moving valve plate can be a split structure, in which case the first column segment and the second column segment are separate from each other. During installation, the first column segment and the second column segment can be fixed together relative to each other.

[0064] Example 3 of the multifunctional water treatment filtration device provided by this utility model:

[0065] The main difference between this embodiment and Embodiment 1 is that in Embodiment 1, the axes of the inlet and outlet coincide. In this embodiment, the inlet and outlet are arranged at a certain angle, provided that the pipeline can be connected normally. Similarly, in other embodiments, the first and second drain outlets can also be arranged at a certain angle.

[0066] The embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A multifunctional water treatment filtration device, comprising a valve body and a movable valve plate rotatably mounted within the valve body, the valve body having an inlet and an outlet, the valve body having a coaxially arranged external valve cavity, an internal valve cavity, a first filter element interface, and a second filter element interface, the first filter element interface being used to communicate with a filter tank, and the second filter element interface being used to communicate with a central pipe, characterized in that: The valve body is also provided with a first drain port and a second drain port, and the first drain port, the second drain port, the inlet and the outlet are all connected to the outer cavity of the valve. The valve cavity is provided with three valve body partitions arranged in pairs at 120° angles and connected together to divide the valve cavity into a working chamber, a backwash chamber and a forward wash chamber arranged in the circumferential direction with equal horizontal cross-sectional areas. The forward wash chamber and the working chamber are connected to the first filter element interface, and the backwash chamber is connected to the second filter element interface. The backwash chamber is close to the first drain outlet, and the backwash chamber wall is provided with a communication port that connects to the valve cavity at the position corresponding to the water outlet. The moving valve plate includes a first column segment and a second column segment arranged coaxially and connected together. The first column segment is located inside the second column segment and is sealed to the upper end face of the valve cavity. The first column segment has a water inlet hole, a first blind groove, and a second blind groove arranged in the circumferential direction with a horizontal cross-sectional area equal to that of the working chamber, the backwash chamber, and the forward wash chamber. The water inlet hole communicates with the valve outer cavity. The first column segment is also provided with a first water outlet communicating with the first blind groove. The second column segment is sleeved outside the cavity wall of the valve cavity and is in sealed contact with the cavity wall of the valve cavity. The second column segment is provided with a second water outlet for connecting the water outlet with the backwash chamber. An annular sealing ring is embedded at one end of the water outlet near the outer cavity of the valve, and at one end of the first drain outlet and the second drain outlet near the outer cavity of the valve. During the rotation stroke of the moving valve plate, when the first column section blocks the first and second drain ports and the second column section connects the water flow path between the outlet and the backwash chamber, the valve body is in the filtration working state; when the first column section connects the first drain port to the first blind tank and blocks the second drain port, and the second column section disconnects the water flow path between the outlet and the backwash chamber, the valve body is in the backwash state; when the first column section connects the second drain port to the first blind tank and blocks the first drain port, and the second column section disconnects the water flow path between the outlet and the backwash chamber, the valve body is in the forward washing state.

2. The multifunctional water treatment filtration device according to claim 1, characterized in that: The moving valve plate has an integral structure, with the first column segment and the second column segment being integrally formed.

3. The multifunctional water treatment filtration device according to claim 2, characterized in that: A fixed valve plate is snapped onto the upper end face of the valve cavity. The outer circumferential surface of the fixed valve plate is in sealing contact with the second column section, and the upper surface of the fixed valve plate is in sealing contact with the first column section. The fixed valve plate is provided with working through holes, backwash through holes and forward wash through holes arranged in the circumferential direction and corresponding one-to-one with the working chamber, backwash chamber and forward wash chamber. The horizontal cross-sectional areas of the working through holes, backwash through holes and forward wash through holes are all equal and are all equal to the horizontal cross-sectional area of ​​the working chamber.

4. The multifunctional water treatment filtration device according to any one of claims 1-3, characterized in that: The outlet end near the valve outer cavity, the first drain outlet and the second drain outlet end near the valve outer cavity are all fitted with elastic mounting parts, and the elastic mounting parts are provided with water flow holes. The annular sealing ring is installed on the corresponding elastic mounting parts.

5. The multifunctional water treatment filtration device according to any one of claims 1-3, characterized in that: The first drain port and the second drain port are symmetrically arranged on both sides of the valve body, and the axis of the first drain port coincides with the axis of the second drain port.

6. The multifunctional water treatment filtration device according to claim 5, characterized in that: The inlet and outlet are symmetrically arranged on both sides of the valve body. The axis of the inlet coincides with the axis of the outlet. The inlet and the first drain outlet are located on the same side of the valve body, and the outlet and the second drain outlet are located on the same side of the valve body.

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