A multifunctional filter valve for water treatment

Abstract

The present invention relates to the technical field of water treatment valve bodies, and in particular to a multifunctional filter valve for water treatment. The multifunctional filter valve for water treatment includes a valve body, a movable valve plate, a fixed valve plate, and a driving device. An inlet, an outlet, and a drain port are provided on the side wall of the valve body; an electric water stop valve is connected to the outlet. An inner cavity and an outer cavity are provided inside the valve body. The inner cavity includes a central drain cavity and a working cavity, a backwash cavity, and a flushing cavity arranged along its outer circumference. A first filter element interface, a second filter element interface, and a third filter element interface are provided at the bottom of the valve body; a fixed valve plate center hole and fan-shaped working through holes, backwash through holes, flushing through holes, and a fixed valve plate blind plate arranged along its outer circumference are set on the fixed valve plate; a movable valve plate center blind hole, a movable valve plate water passage port along its outer circumference, and fan-shaped movable valve plate first blind holes, movable valve plate second blind holes, and drain conduction blind holes are provided on the movable valve plate. Under the conditions of the same installation size and the same functional filtering ability, the present invention can reduce the volume of the valve body and lower the manufacturing cost.

Description

Technical Field

[0001] The invention relates to the technical field of water treatment valve bodies, and in particular to a multifunctional filter valve for water treatment. Background Art

[0002] In recent years, as control valves with flat sealing structures are increasingly used in the field of water treatment, the market has recognized the structure of flat valves. Today's industrial or civil water treatment systems mostly use control valve bodies to switch flow channels. The control valves of the filtration system need to achieve functions such as filtration, backwashing, and forward flushing. The non-filtration processes such as backwashing and forward flushing of the filtration system are collectively referred to as flushing processes. Existing water treatment filter valves mainly change the direction of water flow to achieve operation, backwashing, forward flushing functions or simple operation and backwashing functions. Filter valves are generally used in industrial water treatment equipment such as carbon filtration and sand filtration, and are widely used in domestic water treatment equipment to remove impurities, residual chlorine, heavy metals, etc., improving people's water quality.

[0003] The Chinese invention patent application with application publication number CN114517842A discloses a multifunctional filter valve for water treatment, comprising a valve body, a movable valve plate, a fixed valve plate and a driving device, wherein a water inlet, a water outlet and a drain outlet are arranged on the side wall of the valve body, and the driving device drives the movable valve plate and the fixed valve plate to cooperate to realize the functions of operation, backwashing and forward washing. The multifunctional filter valve for water treatment realizes the advantages that the effective area of ​​the water inlet and outlet holes in the valve body can be freely adjusted within the effective range of the water inlet pipe port outside the valve body as required, and under the condition of not adding auxiliary equipment, it has reached the design limit of the single-body plane structure valve with the same function. However, when the multifunctional filter valve for water treatment is in a normal operating state, since the cross-sectional area of ​​the water hole on the movable valve plate is smaller than the cross-sectional area of ​​the first through hole on the fixed valve plate, the amount of raw water entering the valve body from the water inlet is limited by the cross-sectional area of ​​the water hole on the movable valve plate, and it is difficult to utilize the first through hole on the fixed valve plate to a greater extent, resulting in the need to make the volume of the valve body larger when filtering the raw water of the same flow rate, which undoubtedly increases the manufacturing cost. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a multifunctional filter valve for water treatment to solve the technical problem that the multifunctional filter valve for water treatment in the prior art is large in size and has high manufacturing cost under the conditions of achieving the same functional filtering capacity and the same installation size.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is:

[0006] A multifunctional filter valve for water treatment, comprising a valve body, a movable valve plate, a fixed valve plate and a driving device, wherein the fixed valve plate is coaxially fixed in the valve body, the driving device is transmission-connected with the movable valve plate to drive the movable valve plate to rotate in the valve body, the movable valve plate and the fixed valve plate are rotationally sealed, and a water inlet, a water outlet and a water drain are arranged on the side wall of the valve body;

[0007] The water outlet is connected with an electric water stop valve during use;

[0008] The valve body is provided with a coaxial and separated inner cavity and outer cavity. The outer cavity is communicated with the water inlet. The inner cavity includes a central drainage cavity and a working cavity, a backwashing cavity and a normal washing cavity arranged on the outer circumference of the central drainage cavity. At the bottom of the valve body, there are a first filter element interface, a second filter element interface and a third filter element interface with the same central axis. The first filter element interface is communicated with the backwashing cavity, the second filter element interface is communicated with the normal washing cavity, and the third filter element interface is communicated with the working cavity;

[0009] The center of the fixed valve plate is provided with a central hole of the fixed valve plate. On the fixed valve plate, the part outside the central hole of the fixed valve plate is provided with a working through hole, a backwashing through hole, a normal washing through hole and a fixed valve plate blind plate which are fan-shaped and have the same central axis as the central hole of the fixed valve plate along the circumferential direction. The working through hole is communicated with the third filter element interface, the backwashing through hole is communicated with the first filter element interface, and the normal washing through hole is communicated with the second filter element interface;

[0010] The center position of the movable valve plate is provided with a central blind hole of the movable valve plate. On the movable valve plate, the part outside the central blind hole of the movable valve plate is provided with a water passing port of the movable valve plate and fan-shaped first blind hole, second blind hole and drainage conduction blind hole of the movable valve plate. The drainage conduction blind hole and the second blind hole of the movable valve plate have the same central angle and there is a partition beam of the movable valve plate between them. The drainage conduction blind hole is communicated with the central blind hole of the movable valve plate;

[0011] The horizontal cross-sectional area of the water passing port of the movable valve plate is the same as that of the working through hole, the horizontal cross-sectional area of the first blind hole of the movable valve plate is the same as that of the backwashing through hole, and the horizontal cross-sectional area of the second blind hole of the movable valve plate is the same as that of the normal washing through hole.

[0012] The beneficial effects of the present invention are as follows: The effective area of the water inlet and outlet holes of the multifunctional filter valve for water treatment of the present invention can exceed the effective area of the water inlet and outlet pipe orifices outside the valve body. Under the condition of the maximum water passing area that the valve body can provide, the effective area of the water inlet and outlet holes inside the valve body can be designed as needed. The effective use area of the water passing orifice on the moving valve plate is the same as that of the working through hole on the fixed valve plate. When the multifunctional filter valve for water treatment operates normally, the raw water can enter the tank through the entire area of the working through hole of the fixed valve plate. And when the filtered raw water is discharged, it does not need to pass through the fixed valve plate again and can be directly discharged from the water outlet on the valve body, reducing the water flow path and improving the water outlet efficiency. Compared with the water treatment filter valve in the prior art, under the condition of realizing the same filtering function and the same installation size (limited by the size of the filter material tank orifice), the main structure of the water passing area of the valve body of the multifunctional filter valve for water treatment of the present invention can be made smaller, that is, the overall volume of the valve body can be made smaller. Correspondingly, when the volume of the valve body is reduced, the sizes of other supporting accessories and driving devices of the valve body are also reduced, which can save more manufacturing materials and greatly reduce the manufacturing cost.

[0013] Further, the area ratio of the water passing orifice on the moving valve plate in the part of the moving valve plate outside the central blind hole of the moving valve plate is at least 1 / 3, and the area ratio of the working through hole in the part of the fixed valve plate outside the central hole of the fixed valve plate is at least 1 / 3.

[0014] Beneficial effects: When the filter valve operates normally to filter and purify water, it has a relatively high effective water inlet area. Under the condition of realizing the same filtering function and the same installation size (limited by the size of the filter material tank orifice), it can further reduce the volume of the valve body.

[0015] Preferably, the part of the inner cavity outside the central drainage cavity is divided into three equal parts along the circumferential direction, and the working cavity, backwashing cavity, and normal washing cavity each account for one equal part; the part of the fixed valve plate outside the central hole of the fixed valve plate is divided into three equal parts along the circumferential direction, the working through hole and the backwashing through hole each account for one equal part, and the sum of the horizontal cross-sectional areas of the fixed valve plate blind plate and the normal washing through hole accounts for one equal part; the part of the moving valve plate outside the central blind hole of the moving valve plate is divided into three equal parts along the circumferential direction, the first blind hole of the moving valve plate and the water passing orifice of the moving valve plate each account for one equal part, and the sum of the horizontal cross-sectional areas of the second blind hole of the moving valve plate, the partition beam of the moving valve plate, and the drainage conduction blind hole accounts for one equal part.

[0016] Beneficial effects: Under the condition of ensuring the normal use of the filter valve, the spaces on the moving valve plate, fixed valve plate, and valve body can be fully utilized without space waste.

[0017] Further, the horizontal cross-sectional area of the drainage conduction blind hole is not less than the horizontal cross-sectional area of the second blind hole of the moving valve plate.

[0018] Beneficial effects: Under the condition of the same water inflow, a relatively large drainage area is ensured, and the working efficiency of backwashing and normal washing is improved.

[0019] Preferably, the working through holes correspond to the working chamber and the third filter element interface vertically, the backwashing through holes correspond to the backwashing chamber and the first filter element interface vertically, and the normal washing through holes correspond to the normal washing chamber and the second filter element interface vertically.

[0020] Beneficial effects: After the raw water enters from the water inlet, it can directly enter the tank body or the central pipe through the corresponding through holes, chambers and filter element interfaces, reducing the flow path of the water flow and improving the working efficiency of the filter valve.

[0021] Furthermore, the water passing port of the movable valve plate penetrates the movable valve plate along the axial direction of the valve body and extends to the circumferential surface of the movable valve plate along the radial direction of the valve body.

[0022] Beneficial effects: The production materials of the movable valve plate can be reduced, and the production cost of the movable valve plate can be saved. Description of the Drawings

[0023] Figure 1 is a schematic view of the external structure of the multifunctional filter valve for water treatment according to the present invention;

[0024] Figure 2 is a three-dimensional structure schematic view of the valve body of the multifunctional filter valve for water treatment according to the present invention;

[0025] Figure 3 is a top view of the valve body of the multifunctional filter valve for water treatment according to the present invention;

[0026] Figure 4 is a bottom view of the valve body of the multifunctional filter valve for water treatment according to the present invention;

[0027] Figure 5 is a schematic view of the valve body of the multifunctional filter valve for water treatment when the fixed valve plate is installed;

[0028] Figure 6 is a schematic view of the structure of the fixed valve plate of the multifunctional filter valve for water treatment according to the present invention;

[0029] Figure 7 is a schematic view of the structure of the movable valve plate of the multifunctional filter valve for water treatment according to the present invention;

[0030] Figure 8 is a schematic view of the relative position of the movable valve plate on the valve body when the multifunctional filter valve for water treatment according to the present invention is in a normal operation state;

[0031] Figure 9 is a schematic view of the relative position relationship between the movable valve plate and the fixed valve plate when the multifunctional filter valve for water treatment according to the present invention is in a normal operation state;

[0032] Figure 10 It is a schematic diagram of the relative position of the moving valve plate on the valve body when the multifunctional filter valve for water treatment of the present invention is in the backwashing state;

[0033] Figure 11 It is a schematic diagram of the relative position between the moving valve plate and the fixed valve plate when the multifunctional filter valve for water treatment of the present invention is in the backwashing state;

[0034] Figure 12 It is a schematic diagram of the relative position of the moving valve plate on the valve body when the multifunctional filter valve for water treatment of the present invention is in the normal flushing state;

[0035] Figure 13 It is a schematic diagram of the relative position between the moving valve plate and the fixed valve plate when the multifunctional filter valve for water treatment of the present invention is in the normal flushing state.

[0036] Reference numerals: 1 - valve body, 2 - driving device, 3 - water inlet, 4 - water outlet, 5 - drain port, 6 - first filter element interface, 7 - second filter element interface, 8 - third filter element interface, 9 - working chamber, 10 - backwashing chamber, 11 - normal flushing chamber, 12 - central drain chamber, 13 - fixed valve plate, 14 - moving valve plate, 15 - working through hole, 16 - backwashing through hole, 17 - normal flushing through hole, 18 - central hole of the fixed valve plate, 19 - water passing port of the moving valve plate, 20 - blind plate of the fixed valve plate, 21 - drain conducting blind hole, 22 - central blind hole of the moving valve plate, 23 - first blind hole of the moving valve plate, 24 - second blind hole of the moving valve plate, 25 - partition beam of the moving valve plate. Detailed Description of the Invention

[0037] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] Specific embodiments of the multifunctional filter valve for water treatment of the present invention:

[0039] As Figures 1 to 13 shown, the multifunctional filter valve for water treatment includes an integrally injection-molded valve body 1, a fixed valve plate 13 fixed in the valve body 1, a moving valve plate 14 rotatably assembled in the valve body 1, and a driving device 2 for driving the rotation of the moving valve plate 14. Among them, the moving valve plate 14 and the fixed valve plate 13 are rotatably and sealingly fitted. Water inlets 3 and water outlets 4 are respectively provided on two opposite sides in the radial direction of the valve body 1, and a drain port 5 is provided on the valve body 1 at a position between the water inlet 3 and the water outlet 4; the water inlet 3, the water outlet 4, and the drain port 5 are all provided at the same height on the valve body 1, the water inlet 3 and the water outlet 4 are coaxially arranged, and the axis of the drain port 5 is perpendicular to the axis of the water inlet 3. During use, an electric water stop valve is connected to the water outlet 4. The driving device 2 is a common gear - fork driving structure in the prior art and will not be described in detail here.

[0040] As Figure 2 andFigure 3 As shown in the figure, the valve body 1 has a coaxially arranged and separated inner cavity and outer cavity. The outer cavity is communicated with the water inlet 3, and the central position of the inner cavity is the central drainage cavity 12, and the central drainage cavity 12 is communicated with the above-mentioned drainage port 5. The part of the inner cavity outside the central drainage cavity 12 is divided into three equal parts in terms of area along the circumferential direction, that is, a working cavity 9, a backwash cavity 10 and a normal wash cavity 11 are arranged counterclockwise along the circumferential direction in sequence. The horizontal cross-sections of the working cavity 9, the backwash cavity 10 and the normal wash cavity 11 are all fan-shaped rings, each accounting for one equal part, and are concentric with the central drainage cavity 12.

[0041] As Figure 4 shown in the figure, the bottom of the valve body 1 is provided with a first filter element interface 6, a second filter element interface 7 and a third filter element interface 8. Among them, the first filter element interface 6 is located at the central position of the bottom of the valve body, and the second filter element interface 7 and the third filter element interface 8 are located radially outside the first filter element interface 6 and are arranged around the circumference of the first filter element interface 6. The first filter element interface 6, the second filter element interface 7 and the third filter element interface 8 are all concentric with the central axis.

[0042] As Figure 5 and Figure 6 shown in the figure, the fixed valve plate 13 is clamped in the valve body 1 through two pairs of supporting feet and is located above the inner cavity, corresponding to the inner cavity up and down. The horizontal cross-sectional area of the part of the fixed valve plate 13 except the supporting feet is the same as the horizontal cross-sectional area of the inner cavity. The fixed valve plate 13 is stacked on the top of the inner cavity in the up and down direction. As Figure 6 shown in the figure, a fixed valve plate central hole 18 is provided at the central position of the fixed valve plate 13. The part of the fixed valve plate 13 outside the fixed valve plate central hole 18 is divided into three equal parts in terms of area along the circumferential direction. One equal part is the working through hole 17, another equal part is the backwash through hole 16, and the last equal part includes a fixed valve plate blind plate 20 located inside and a normal wash through hole 17 located radially outside the fixed valve plate blind plate 20. The working through hole 15, the backwash through hole 16 and the normal wash through hole 17 are all fan-shaped rings and are concentric with the central axis. The horizontal cross-sectional areas of the working through hole 15 and the backwash through hole 16 are respectively the same as the horizontal cross-sectional areas of the working cavity 9 and the backwash cavity 10. The sum of the horizontal cross-sectional area of the normal wash through hole 17 and the fixed valve plate blind plate 20 is the same as the horizontal cross-sectional area of the normal wash cavity 11.

[0043] As Figure 5 shown in the figure, after the fixed valve plate 13 is installed on the valve body 1, the working through hole 17, the working cavity 9 and the third filter element interface 8 are communicated with each other; the backwash through hole 16, the backwash cavity 10 and the first filter element interface 6 are communicated with each other; the normal wash through hole 17, the normal wash cavity 11 and the second filter element interface 7 are communicated with each other.

[0044] As Figure 7As shown in the figure, a dynamic valve plate central blind hole 22 is provided at the central position of the dynamic valve plate 14. The part of the dynamic valve plate 14 outside the dynamic valve plate central blind hole 22 is equally divided into three parts along the circumferential direction, and the central angle of each part is 120°. One of the equal parts is completely cut off to form a dynamic valve plate water passage hole 19 that penetrates the dynamic valve plate 14 up and down. Another equal part is a fan-shaped dynamic valve plate first blind hole 23. A dynamic valve plate partition beam 25 is provided in the remaining equal part to divide this part into a fan-shaped drainage conduction blind hole 21 and a fan-shaped dynamic valve plate second blind hole 24. The drainage conduction blind hole 21 communicates with the dynamic valve plate central blind hole 22, and the horizontal cross-sectional area of the drainage conduction blind hole 21 is equal to the horizontal cross-sectional area of the dynamic valve plate second blind hole 24. The horizontal cross-sectional area of the dynamic valve plate second blind hole 24 is the same as the horizontal cross-sectional area of the positive flushing through hole 17 on the above-mentioned fixed valve plate 13; the sum of the horizontal cross-sectional area of the drainage conduction blind hole 21 and the horizontal cross-sectional area of the dynamic valve plate partition beam 25 is equal to the horizontal cross-sectional area of the above-mentioned fixed valve plate blind plate 20; the horizontal cross-sectional areas of the dynamic valve plate first blind hole 23, the backwashing through hole 16, the working through hole 17, and the dynamic valve plate water passage hole 19 are all the same.

[0045] The multifunctional filter valve for water treatment of the present invention has a normal operation mode, a backwashing mode, and a positive flushing mode. By driving the dynamic valve plate 14 to rotate through the driving device 2, the positions of the various different through holes or blind holes on the dynamic valve plate 14 and the fixed valve plate 13 are switched with each other to realize the switching operation of different modes.

[0046] The working process is as follows:

[0047] As Figure 8 and Figure 9 shown, the multifunctional filter valve for water treatment is in the normal operation mode, and the electric water stop valve connected to the water outlet 4 is opened at this time. Working process: Raw water enters the outer chamber of the valve body 1 from the water inlet 3, and successively passes through the dynamic valve plate water passage hole 19, the working through hole 15, and the working chamber 9, and enters the tank connected to the valve body 1 along the third filter interface 8. The tank is provided with a filter material layer such as activated carbon or quartz sand for purifying water. The purified water passes through the central pipe of the tank, successively passes through the first filter element interface 6 and the backwashing chamber 10, and finally flows out from the water outlet 4 to realize the normal operation of the multifunctional filter valve for water treatment.

[0048] As Figure 10 and Figure 11As shown, the multi-functional filter valve for water treatment is in the backwashing mode. At this time, the electric water stop valve connected to the water outlet 4 is closed, and the moving valve plate 14 rotates counterclockwise by 120° under the driving action of the driving device 2 (compared with the position of the moving valve plate in the normal operation mode). Working process: The backwashing water enters the outer chamber of the valve body 1 from the water inlet 3, and successively passes through the water passing port 19 of the moving valve plate, the backwashing through hole 16, and the backwashing chamber 10, and enters the central pipe along the first filter interface 6, flushing the filter material layer from bottom to top. The waste water from the backwashing enters the working chamber 9 from the third filter element interface 8, and successively passes through the working through hole 15, the drainage conduction blind hole 21, and the central blind hole 22 of the moving valve plate to enter the central drainage chamber 12, and finally is discharged through the drainage port 5, realizing the backwashing of the multi-functional filter valve for water treatment.

[0049] As Figure 12 and Figure 13 shown, the multi-functional filter valve for water treatment is in the flushing mode. At this time, the electric water stop valve connected to the water outlet 4 is still closed, and the moving valve plate 14 rotates counterclockwise by 240° under the driving action of the driving device 2 (compared with the position of the moving valve plate in the normal operation mode). Working process: The flushing water enters the outer chamber of the valve body 1 from the water inlet 3, and successively passes through the water passing port 19 of the moving valve plate, the flushing through hole 17, and the flushing chamber 11, and enters the tank along the second filter element interface 7. The flushing water flows through the filter material layer from top to bottom, and then enters the backwashing chamber 10 from the central pipe through the first filter element interface 6, and successively passes through the backwashing through hole 16, the drainage conduction blind hole 21, and the central blind hole 22 of the moving valve plate to enter the central drainage chamber 12, and finally is discharged through the drainage port 5, realizing the flushing of the multi-functional filter valve for water treatment.

[0050] The effective area of the water inlet and outlet holes of the multifunctional filter valve for water treatment of the present invention can exceed the effective area of the water inlet and outlet pipe orifices outside the valve body. Under the condition that the valve body can provide the maximum water passing area, the effective area of the water inlet and outlet holes inside the valve body can be designed as required. The effective use area of the water passing orifice on the moving valve plate of the present invention is the same as that of the working through hole on the fixed valve plate. When the multifunctional filter valve for water treatment is operating normally, the raw water can enter the tank through the working through hole of the fixed valve plate over the entire area, and when the filtered raw water is discharged, it does not need to pass through the fixed valve plate again and can be directly discharged from the water outlet on the valve body, reducing the water flow path and improving the water outlet efficiency. Compared with the water treatment filter valve in the prior art, under the condition of realizing the same filtering capacity and the same installation size (limited by the size of the filter material tank orifice), the main structure of the water passing area of the valve body of the multifunctional filter valve for water treatment of the present invention can be reduced by at least 40%, and the overall volume of the valve body can be reduced by at least 35%. Of course, in actual production, the wall thickness of the valve body, the number and thickness of the partition beams on the valve plate, and the production thickness of each valve plate ring beam can also be reduced, thereby further reducing the volume and weight of the valve body, and finally enabling the main structure of the water passing area of the valve body to be reduced by more than 40%, and the overall volume of the valve body to be reduced by more than 35%. Correspondingly, when the volume of the valve body is reduced, the sizes of other supporting accessories and driving devices of the valve body are also reduced, so that more manufacturing materials can be saved and the manufacturing cost can be greatly reduced.

[0051] In other embodiments, the equally divided part on the moving valve plate for forming the water passing orifice of the moving valve plate may not be completely cut off. At this time, the moving valve plate has a complete circumferential surface. Correspondingly, the thickness of the 1 / 3 circumferential wall of the moving valve plate corresponding to the water passing orifice of the moving valve plate is not greater than the thickness of other parts of the moving valve plate.

[0052] In other embodiments, the horizontal cross-sectional areas of the drainage conduction blind hole and the second blind hole of the moving valve plate can also be designed as required. For example, the horizontal cross-sectional area of the drainage conduction blind hole can be larger or smaller than the horizontal cross-sectional area of the second blind hole of the moving valve plate.

[0053] The embodiments of the present invention described above do not constitute a limitation to the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. A multifunctional filter valve for water treatment, comprising a valve body, a moving valve plate, a fixed valve plate and a driving device. The fixed valve plate is coaxially fixed inside the valve body, and the driving device is in transmission connection with the moving valve plate to drive the moving valve plate to rotate inside the valve body. The moving valve plate is rotationally and sealingly engaged with the fixed valve plate. The side wall of the valve body is provided with a water inlet, a water outlet and a drain port, and it is characterized in that: The valve body is provided with a coaxial and separated inner cavity and outer cavity. The outer cavity is communicated with the water inlet. The inner cavity includes a central drainage cavity, a working cavity, a backwashing cavity and a normal washing cavity arranged on the outer circumference of the central drainage cavity. At the bottom of the valve body, there are a first filter element interface, a second filter element interface and a third filter element interface with the same central axis. The first filter element interface is communicated with the backwashing cavity, the second filter element interface is communicated with the normal washing cavity, and the third filter element interface is communicated with the working cavity. A central hole of the fixed valve plate is provided at the center of the fixed valve plate. On the part of the fixed valve plate outside the central hole of the fixed valve plate, there are arranged a working through hole, a backwashing through hole, a normal washing through hole and a fixed valve plate blind plate which are fan-shaped and coaxial with the central hole of the fixed valve plate along the circumferential direction. The working through hole is communicated with the third filter element interface, the backwashing through hole is communicated with the first filter element interface, and the normal washing through hole is communicated with the second filter element interface. A central blind hole of the movable valve plate is provided at the central position of the movable valve plate. On the part of the movable valve plate outside the central blind hole of the movable valve plate, there are arranged a water passing port of the movable valve plate, a first blind hole of the movable valve plate, a second blind hole of the movable valve plate and a drainage conduction blind hole which are fan-shaped along the circumferential direction. The drainage conduction blind hole and the second blind hole of the movable valve plate have the same central angle and there is a partition beam of the movable valve plate between them. The drainage conduction blind hole is communicated with the central blind hole of the movable valve plate. The horizontal cross-sectional area of the water passing port of the movable valve plate is the same as the horizontal cross-sectional area of the working through hole. The horizontal cross-sectional area of the first blind hole of the movable valve plate is the same as the horizontal cross-sectional area of the backwashing through hole. The horizontal cross-sectional area of the second blind hole of the movable valve plate is the same as the horizontal cross-sectional area of the normal washing through hole. The area ratio of the water passing port of the movable valve plate on the part of the movable valve plate outside the central blind hole of the movable valve plate is at least 1 / 3. The area ratio of the working through hole on the part of the fixed valve plate outside the central hole of the fixed valve plate is at least 1 / 3. The part of the inner cavity outside the central drainage cavity is equally divided into three parts along the circumferential direction, and the working cavity, the backwashing cavity and the normal washing cavity each account for one part. The part of the fixed valve plate outside the central hole of the fixed valve plate is equally divided into three parts along the circumferential direction, the working through hole and the backwashing through hole each account for one part, and the sum of the horizontal cross-sectional areas of the fixed valve plate blind plate and the normal washing through hole accounts for one part. The part of the movable valve plate outside the central blind hole of the movable valve plate is equally divided into three parts along the circumferential direction, the first blind hole of the movable valve plate and the water passing port of the movable valve plate each account for one part, and the sum of the horizontal cross-sectional areas of the second blind hole of the movable valve plate, the partition beam of the movable valve plate and the drainage conduction blind hole accounts for one part.

2. The multifunctional filter valve for water treatment according to claim 1, characterized in that The horizontal cross-sectional area of the drainage conduction blind hole is not less than the horizontal cross-sectional area of the second blind hole of the movable valve plate.

3. The multifunctional filter valve for water treatment according to claim 1 or 2, characterized in that The working through hole corresponds to the working cavity and the third filter element interface up and down. The backwashing through hole corresponds to the backwashing cavity and the first filter element interface up and down. The normal washing through hole corresponds to the normal washing cavity and the second filter element interface up and down.

4. The multifunctional filter valve for water treatment according to claim 1 or 2, characterized in that The water passing port of the movable valve plate penetrates the movable valve plate axially along the valve body and extends radially along the valve body to the circumferential surface of the movable valve plate.

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