A multifunction filter valve

Abstract

The application provides a multifunctional filter valve, relates to a water treatment valve body technical field, and comprises a valve body, a movable valve sheet, a fixed valve sheet and a driving device, a water inlet, a water outlet and a drain outlet are arranged on the side wall of the valve body, a valve is connected to the water outlet, an inner chamber and an outer chamber are arranged in the valve body, the inner chamber comprises a central drain cavity, a working cavity, a backwashing cavity and a blind cavity which are arranged along the outer circumference of the inner chamber, a first filter core interface and a second filter core interface are arranged at the bottom of the valve body, a central through hole and a fan ring-shaped first through hole, a second through hole and a blind plate which are arranged along the outer circumference of the fixed valve sheet are arranged on the fixed valve sheet, and a central blind hole, a water inlet through hole, a drain blind hole, a first blind hole and a second blind hole which are arranged along the outer circumference of the movable valve sheet are arranged on the movable valve sheet. The fixed valve sheet and the movable valve sheet are matched to realize normal water outlet, backwashing and forward washing modes, the internal structure of the valve body is simple under the condition of realizing the same filtering function, the manufacturing cost is reduced, and the problem that the internal structure of the filter valve in the prior art is relatively complex and leads to high manufacturing cost is solved.

Description

Technical Field

[0001] This invention belongs to the field of water treatment valve technology, specifically providing a multifunctional filter valve. Background Technology

[0002] In recent years, with the increasing application of control valves with planar sealing structures in the water treatment field, the market has recognized the structure of planar valves. Modern industrial and domestic water treatment systems mostly use control valve bodies to switch flow paths. Control valves in filtration systems need to perform functions such as filtration, backwashing, and forward washing. The non-filtration processes such as backwashing and forward washing in a filtration system are collectively referred to as the flushing process. Existing water treatment filter valves mainly change the direction of water flow to achieve operation, backwashing, and forward washing functions, or simply operation and backwashing functions. Filter valves are generally used in industrial water treatment equipment such as carbon filters and sand filters, and are widely used in domestic water treatment equipment to remove impurities, residual chlorine, heavy metals, etc., improving the quality of drinking water.

[0003] Chinese patent application CN202211072848.6 discloses a multi-functional water treatment filter valve, 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 a working chamber, a forward washing chamber, and a backwashing chamber. The bottom of the valve body has corresponding third, second, and first filter element interfaces. The drive device drives the moving and fixed valve plates to perform operation, backwashing, and forward washing functions. In this technical solution, the valve body has three chambers—a working chamber, a forward washing chamber, and a backwashing chamber—and three corresponding filter element interfaces, resulting in a relatively complex internal structure. Furthermore, the fixed valve plate also has a relatively complex structure to accommodate the operation, backwashing, and forward washing functions, which undoubtedly increases manufacturing costs.

[0004] Accordingly, there is a need in the art for a multifunctional filter valve to better optimize existing filter valves. Summary of the Invention

[0005] This invention proposes a multifunctional filter valve, which solves the problem that the relatively complex internal structure of existing filter valves leads to high manufacturing costs.

[0006] The technical solution of the present invention is implemented as follows: a multifunctional filter valve includes a valve body, a moving valve plate and a driving device. The valve body has an inlet, an outlet and a drain on its side wall. The outlet is connected to a valve during use.

[0007] The valve body is provided with a coaxial and separated inner chamber and an outer chamber. The outer chamber is connected to the water inlet. The inner chamber includes a central drain chamber and a working chamber, a backwash chamber and a blind chamber distributed circumferentially along the central drain chamber. The central drain chamber is connected to the drain outlet and the backwash chamber is connected to the water outlet. The bottom of the valve body is provided with a first filter element interface and a second filter element interface on the same central axis. The first filter element interface is connected to the working chamber and the second filter element interface is connected to the backwash chamber.

[0008] The moving valve plate is coaxially disposed above the inner cavity. The driving device is connected to the moving valve plate to drive the moving valve plate to rotate within the valve body. A central blind hole is provided at the center of the moving valve plate. A water inlet through hole and a fan-shaped drainage blind hole and a flow-blocking part are provided around the circumference of the central blind hole. The drainage blind hole and the flow-blocking part are coaxial with the central blind hole. The central blind hole is connected to the central drainage cavity. The central angle of the drainage blind hole is not greater than the central angle of the blind cavity. The central angle of the flow-blocking part is equal to the central angle of the water inlet through hole, equal to the central angle of the working cavity, and equal to the central angle of the backwash cavity.

[0009] Beneficial effects: The multifunctional filter valve of the present invention, under the condition that the valve body can provide the maximum water flow area, can be designed with the effective area of ​​the inlet and outlet holes in the valve body as needed. Moreover, compared with the technical solutions mentioned in the background art, the present invention, through the cooperation of the working chamber, backwash chamber, blind chamber and moving valve plate, reduces the opening of one filter element interface and optimizes the setting of the fixed valve plate while achieving the same filtration function. This simplifies the internal structure of the valve body, reduces manufacturing costs, and is more conducive to widespread use.

[0010] In the preferred embodiment of the above-mentioned multifunctional filter valve, the flow obstruction part includes a first blind hole, a second blind hole, and a first partition beam disposed between the first blind hole and the second blind hole. A second partition beam is disposed between the first blind hole and the drain blind hole, and the central angle of the second blind hole is equal to the central angle of the drain blind hole.

[0011] Beneficial effects: By opening blind holes in the flow-blocking section and using the partition beams between the blind holes to form a flow-blocking effect, the material used for the moving valve plate can be reduced, further reducing manufacturing costs.

[0012] In the preferred embodiment of the above-mentioned multifunctional filter valve, the multifunctional filter valve includes a fixed valve plate, which is coaxially fixed to the top end face of the inner cavity. A movable valve plate is located above the fixed valve plate and rotates and seals with the fixed valve plate. The fixed valve plate has a central through hole in its center. The fixed valve plate is provided with a first through hole, a second through hole and a blind plate along the circumference of the central through hole, which are coaxial with the central through hole and are fan-shaped. The central through hole communicates with the central drainage cavity. The first through hole communicates with the first filter element interface. The second through hole communicates with the second filter element interface. The blind plate has the same central angle as the blind cavity and is arranged vertically and vertically.

[0013] Beneficial effects: The fixed valve plate and the moving valve plate work together to change the water flow path, avoiding the wear of the inner cavity end face caused by the moving valve plate directly rotating with the inner cavity, which would make maintenance and replacement inconvenient.

[0014] In the preferred embodiment of the above-mentioned multifunctional filter valve, the horizontal cross-sectional area of ​​the first through hole is equal to the horizontal cross-sectional area of ​​the inlet through hole, the horizontal cross-sectional area of ​​the second through hole is equal to the horizontal cross-sectional area of ​​the flow-blocking part, and the horizontal cross-sectional area of ​​the blind plate is equal to the horizontal cross-sectional area of ​​the blind cavity.

[0015] Beneficial effects: The effective usable area of ​​the inlet hole and the first through hole on the fixed valve plate is the same. When the multi-functional filter valve is running normally, the raw water passing through the inlet hole can enter the tank body in equal amount through the first through hole of the fixed valve plate. When the raw water is discharged after filtration, it does not need to pass through the fixed valve plate again and can be discharged directly from the outlet on the valve body, reducing the water flow path and improving the water discharge efficiency.

[0016] In the preferred embodiment of the above-mentioned multifunctional filter valve, the central angle of the blind plate is greater than 0° and less than 120°, the central angles of the first through hole and the second through hole are equal and greater than 120° and less than 180°, and the sum of the central angle of the blind plate, the central angle of the first through hole and the central angle of the second through hole is equal to 360°.

[0017] Beneficial effects: When the filter valve is used to filter and purify water during normal operation, it has a high effective water inlet area. Under the conditions of achieving the same functional filtration capacity and the same installation size (limited by the size of the filter media tank opening), the volume of the valve body can be further reduced.

[0018] In the preferred embodiment of the above-mentioned multifunctional filter valve, the central angle of the blind plate is 60°, and the central angles of the first through hole and the second through hole are 150°.

[0019] Beneficial effects: The filter valve ensures sufficient water intake and moderate drainage flow during forward and reverse washing, guaranteeing effective cleaning.

[0020] In the preferred embodiment of the above-mentioned multifunctional filter valve, the water inlet hole penetrates the moving valve plate along the axial direction of the valve body and penetrates the circumferential surface of the moving valve plate along the radial direction of the valve body.

[0021] Beneficial effects: It can reduce the amount of material used in the production of moving valve plates, thus saving on the manufacturing cost of moving valve plates.

[0022] In the preferred embodiment of the above-mentioned multifunctional filter valve, the first through hole corresponds vertically to the working chamber and the first filter element interface, and the second through hole corresponds vertically to the backwash chamber and the second filter element interface.

[0023] Beneficial effects: After the raw water enters from the inlet, it can directly enter the tank or central pipe through the corresponding through holes, chambers and filter element interfaces, and then to the outlet, reducing the flow path of the water and improving the working efficiency of the filter valve. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall structure of a multifunctional filter valve according to the present invention;

[0026] Figure 2 This is a top view of the internal structure of the valve body of a multifunctional filter valve according to the present invention;

[0027] Figure 3 This is a bottom view of the valve body structure of a multifunctional filter valve according to the present invention.

[0028] Figure 4 This is a first-view view of the internal structure of the valve body of a multifunctional filter valve according to the present invention.

[0029] Figure 5 This is a second-view view of the internal structure of the valve body of a multifunctional filter valve according to the present invention.

[0030] Figure 6 This is a schematic diagram of the structure of the fixed valve plate of a multifunctional filter valve according to the present invention;

[0031] Figure 7 This is a schematic diagram of the installation of the fixed valve plate in the valve body of a multifunctional filter valve according to the present invention.

[0032] Figure 8 This is a schematic diagram of the structure of the moving valve plate of a multifunctional filter valve according to the present invention;

[0033] Figure 9 This is a schematic diagram of the installation of the moving valve plate in the valve body of a multifunctional filter valve according to the present invention.

[0034] Figure 10 This diagram illustrates the relative positions of the moving valve plate and the stationary valve plate in the normal operating mode of a multifunctional filter valve according to the present invention.

[0035] Figure 11 This diagram shows the relative positions of the moving valve plate and the stationary valve plate in the backwashing mode of a multifunctional filter valve according to the present invention.

[0036] Figure 12 This diagram shows the relative positions of the moving valve plate and the stationary valve plate in the forward washing mode of a multifunctional filter valve according to the present invention.

[0037] List of reference numerals in the attached drawings: 1. Valve body; 11. Outer chamber; 12. Central drain chamber; 13. Working chamber; 14. Backwash chamber; 15. Blind chamber; 16. First filter element interface; 17. Second filter element interface; 2. Fixed valve plate; 21. Support foot; 22. Central through hole; 23. First through hole; 24. Second through hole; 25. Blind plate; 3. Moving valve plate; 31. Central blind hole; 32. Water inlet through hole; 33. Drain blind hole; 34. First blind hole; 35. Second blind hole; 36. First partition beam; 37. Second partition beam; 4. Drive device; 5. Water inlet; 6. Water outlet; 7. Drain outlet. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] A specific embodiment of the multifunctional filter valve of the present invention:

[0040] like Figures 1 to 12 As shown, the multi-functional filter valve includes an integrally injection-molded valve body 1, a fixed valve plate 2 fixed inside the valve body 1, a movable valve plate 3 rotatably assembled inside the valve body 1, and a drive device 4 for driving the movable valve plate 3 to rotate. The movable valve plate 3 and the fixed valve plate 2 are in a rotatable sealing fit. An inlet 5 and an outlet 6 are respectively provided on opposite radial sides of the valve body 1. A drain port 7 is provided on the valve body 1 between the inlet 5 and the outlet 6. The inlet 5 and the outlet 6 are coaxially arranged, and the axis of the drain port 7 is perpendicular to the axis of the inlet 5. In use, a valve is connected to the outlet 6. The drive device 4 is a common gear and fork drive structure in the prior art, which will not be described in detail here.

[0041] like Figure 2 , Figure 4 and Figure 5As shown, the valve body 1 has an inner chamber and an outer chamber 11 arranged coaxially and separated. The outer chamber 11 is connected to the water inlet 5. The center of the inner chamber is the central drain chamber 12, which is connected to the drain outlet 7. The inner chamber has a working chamber 13, a backwash chamber 14 and a blind chamber 15 distributed sequentially along the circumference of the central drain chamber 12. The horizontal cross-section of the working chamber 13, the backwash chamber 14 and the blind chamber 15 is fan-shaped and is coaxial with the central drain chamber 12. The central angle of the working chamber 13 is equal to the central angle of the backwash chamber 14, which is 150°. The central angle of the blind chamber 15 is 60°. The backwash chamber 14 is connected to the water outlet 6.

[0042] like Figure 2 and Figure 3 As shown, the bottom of the valve body 1 is provided with a first filter element interface 16 and a second filter element interface 17. The second filter element interface 17 is located at the center of the bottom of the valve body 1 and is connected to the backwash chamber 14. The first filter element interface 16 is located on the radial outer side of the second filter element interface 17 and is arranged around the second filter element interface 17 in a circumferential manner. The first filter element interface 16 is connected to the working chamber 13. The first filter element interface 16 and the second filter element interface 17 are on the same central axis.

[0043] like Figure 6 and Figure 7 As shown, the fixed valve plate 2 is engaged within the valve body 1 by two pairs of support legs 21 and is located above the inner chamber. The horizontal cross-sectional area of ​​the portion of the fixed valve plate 2 excluding the support legs 21 is the same as the horizontal cross-sectional area of ​​the inner chamber. The fixed valve plate 2 is stacked above the inner chamber and is sealed in a corresponding manner with the inner chamber. A central through hole 22 is provided in the center of the fixed valve plate 2. Along the circumference of the central through hole 22, the fixed valve plate 2 has a first through hole 23, a second through hole 24, and a blind plate 25, which are coaxial with the central through hole 22 and form a fan-shaped ring. The central angle of the first through hole 23 is equal to the central angle of the second through hole 24, which is 150°, and the central angle of the blind plate 25 is 60°. The horizontal cross-sectional area of ​​the first through hole 23 is the same as the horizontal cross-sectional area of ​​the working chamber 13, the horizontal cross-sectional area of ​​the second through hole 24 is the same as the horizontal cross-sectional area of ​​the backwash chamber 14, and the horizontal cross-sectional area of ​​the blind plate 25 is the same as the horizontal cross-sectional area of ​​the blind chamber 15.

[0044] When the fixed valve plate 2 is installed inside the valve body 1, the central through hole 22 is connected to the central drain cavity 12, the first through hole 23 is connected to the first filter element interface 16, the second through hole 24 is connected to the second filter element interface 17, and the blind plate 25 is set vertically and vertically to the blind cavity 15.

[0045] like Figure 8 and Figure 9As shown, a central blind hole 31 is provided at the center of the moving valve plate 3. A water inlet through hole 32 and a fan-shaped drainage blind hole 33 and a flow-blocking part are provided around the central blind hole 31. The flow-blocking part includes a first blind hole 34, a second blind hole 35, a first partition beam 36 disposed between the first blind hole 34 and the second blind hole 35, and a second partition beam 37 disposed between the first blind hole 34 and the drainage blind hole 33. The drain blind hole 33, the first blind hole 34, and the second blind hole 35 are coaxial with the central blind hole 31. The drain blind hole 33 is connected to the central blind hole 31. The central angle of the second blind hole 35 is equal to the central angle of the drain blind hole 33 and the central angle of the blind cavity 15, which is 60°. The central angle of the water inlet through hole 32 is equal to the central angle of the first through hole 23, the central angle of the flow-blocking part, and the central angle of the second through hole 24, which is 150°. The water inlet through hole 32 penetrates the moving valve plate 3 along the axial direction of the valve body 1 and penetrates the circumferential surface of the moving valve plate 3 along the radial direction of the valve body 1. The horizontal cross-sectional area of ​​the flow-blocking part is equal to the horizontal cross-sectional area of ​​the first through hole 23 and the horizontal cross-sectional area of ​​the second through hole 24. The horizontal cross-sectional area of ​​the water inlet through hole 32 is equal to the first through hole 23 plus the horizontal cross-sectional area of ​​its circumferential wall. When the moving valve plate 3 is installed above the fixed valve plate 2, the central blind hole 31 is connected to the central drain cavity 12 through the central through hole 22.

[0046] The multifunctional filter valve of the present invention has a normal operation mode, a backwash mode and a forward wash mode. The moving valve plate 3 is driven to rotate by the driving device 4, so that the moving valve plate 3 and the fixed valve plate 2 cooperate to achieve switching operation of different modes.

[0047] The work process is as follows:

[0048] like Figure 9 and Figure 10 As shown, in normal operating mode, the valve connected to the outlet 6 is open, the inlet hole 32 of the moving valve plate 3 is vertically connected to the first through hole 23 of the fixed valve plate 2, the flow-blocking part of the moving valve plate 3 is vertically connected to the second through hole 24 of the fixed valve plate 2, and the drain blind hole 33 of the moving valve plate 3 is vertically connected to the blind plate 25 of the fixed valve plate 2. The raw water enters the outer chamber 11 of the valve body 1 from the inlet 5, and passes through the inlet hole 32, the first through hole 23, and the working chamber 13 in sequence. It then enters the tank connected to the valve body 1 through the first filter element interface 16. The tank is equipped with a filter material layer such as activated carbon or quartz sand for water purification. The purified water flows along the central pipe of the tank, passes through the second filter element interface 17 and the backwash chamber 14 in sequence, and finally flows out from the outlet 6, realizing the normal operation of the multi-functional filter valve.

[0049] like Figure 7 and Figure 11As shown, in backwash mode, the valve connected to outlet 6 is closed, and the drive device 4 drives the moving valve plate 3 to rotate counterclockwise by 150° (relative to the position of the moving valve plate 3 in normal operation mode), so that the water inlet hole 32 on the moving valve plate 3 is connected to the second through hole 24 on the fixed valve plate 2, the second blind hole 35 is connected to the blind plate 25, and the first blind hole 34 and the drain blind hole 33 are connected to the first through hole 23. Backwash water enters the outer chamber 11 of valve body 1 from inlet 5, and passes through inlet hole 32, second through hole 24, backwash chamber 14 in sequence, and enters the central tube of the tank connected to valve body 1 through second filter element interface 17, rinsing the filter material layer from bottom to top. Backwash wastewater enters the working chamber 13 from first filter element interface 16, and passes through first through hole 23, drain blind hole 33, central blind hole 31, central through hole 22 in sequence into central drain chamber 12, and finally is discharged through drain outlet 7, realizing the backwashing of the multi-functional filter valve.

[0050] like Figure 7 and Figure 12 As shown, in the forward washing mode, the valve connected to the outlet 6 is closed, and the drive device 4 drives the moving valve plate 3 to rotate counterclockwise by 300° (relative to the position of the moving valve plate 3 in normal operation mode). This causes part of the water inlet hole 32 on the moving valve plate 3 to be blocked by the blind plate 25, and part to communicate with the first through hole 23 on the fixed valve plate 2. The first through hole 23, except for the part communicating with the water inlet hole 32, corresponds vertically to the second blind hole 35. The drain blind hole 33 and the first blind hole 34 correspond vertically to the second through hole 24. The wash water enters the outer chamber 11 of the valve body 1 through the inlet 5, and passes through the inlet through hole 32, the first through hole 23, and the working chamber 13 in sequence. It then enters the tank through the first filter element interface 16. The wash water flows from top to bottom through the filter media layer, and then enters the backwash chamber 14 through the second filter element interface 17 from the central pipe. It then passes through the second through hole 24, the drain blind hole 33, the central blind hole 31, and the central through hole 22 in sequence to enter the central drain chamber 12. Finally, it is discharged through the drain outlet 7, thus realizing the forward washing of the multi-functional filter valve.

[0051] It is understandable that, although in the above embodiments, the central angle of the first through hole 23 on the fixed valve plate 2 is equal to the central angle of the second through hole 24 (150°) and the central angle of the blind plate 25 is equal to 60°, this is not a limitation on the angles of the central angles of the first through hole, the second through hole, and the blind plate. In other embodiments, the central angle of the first through hole on the fixed valve plate is equal to the central angle of the second through hole (170°) and the central angle of the blind plate is equal to 20°; or, the central angle of the first through hole is equal to... The central angle of the second through hole is 130°, and the central angle of the blind plate is 100°. Accordingly, the central angles of the working chamber, backwash chamber, and blind chamber of the inner cavity are adjusted accordingly. The central angles of the water inlet through hole, drain blind hole, first blind hole, and second blind hole on the moving valve plate are also adjusted accordingly. As long as the central angle of the first through hole is equal to the central angle of the second through hole, the central angle of the first through hole is greater than 120° and less than 180°, and the central angle of the blind plate is greater than 0° and less than 120°, it is acceptable.

[0052] It is understood that, although in the above embodiments, the flow-blocking part on the moving valve plate 3 includes a first blind hole 34, a second blind hole 35, and a first partition beam 36 disposed between the first blind hole 34 and the second blind hole 35, this is not a limitation on the structure of the flow-blocking part. In other embodiments, the flow-blocking part is a blind block, and when the moving valve plate is installed on the fixed valve plate, the blind block is in contact with the upper end face of the fixed valve plate.

[0053] It is understandable that, although in the above embodiments, the water inlet hole 32 on the moving valve plate 3 penetrates the moving valve plate 3 along the axial direction of the valve body 1 and penetrates the circumferential surface of the moving valve plate 3 along the radial direction of the valve body 1, this is not a limitation on the structure of the water inlet hole. In other embodiments, the water inlet hole penetrates the moving valve plate along the axial direction of the valve body and extends radially into the circumferential surface of the moving valve plate, so that the horizontal cross-sectional area of ​​the water inlet hole is equal to the horizontal cross-sectional area of ​​the first through hole on the fixed valve plate.

[0054] Example 2

[0055] The difference from the above embodiment is that the fixed valve plate 2 is not provided; the movable valve plate 3 is directly rotatably mounted above the inner cavity. The horizontal cross-sectional area of ​​the movable valve plate 3 is equal to the horizontal cross-sectional area of ​​the inner cavity, and the movable valve plate 3 is sealed to the top end face of the inner cavity. The central angle of the water inlet hole 32 on the movable valve plate 3 is equal to the central angle of the flow-blocking part, which is 150°, and the central angle of the drain blind hole 33 is 60°. The central angle of the water inlet hole 32 on the movable valve plate 3 is equal to the central angle of the working chamber 13, the central angle of the flow-blocking part, and the central angle of the backwash chamber 14. The central angle of the second blind hole 35 is equal to the central angle of the drain blind hole 33 and the central angle of the blind cavity 15. The horizontal cross-sectional area of ​​the water inlet hole 32 on the movable valve plate 3 is equal to the horizontal cross-sectional area of ​​the working chamber 13, the horizontal cross-sectional area of ​​the flow-blocking part, and the horizontal cross-sectional area of ​​the backwash chamber 14. The horizontal cross-sectional area of ​​the drain blind hole 33 plus the horizontal cross-sectional area of ​​the partition beams on both sides is equal to the horizontal cross-sectional area of ​​the blind cavity 15.

[0056] The multi-functional filter valve in this embodiment also has a normal operation mode, a backwash mode, and a forward wash mode. The moving valve plate 3 is driven to rotate by the drive device 4, so that the moving valve plate 3 and the inner chamber cooperate to achieve the switching operation of different modes.

[0057] The work process is as follows:

[0058] like Figure 2 and Figure 8 As shown, in normal operating mode, the valve connected to the outlet 6 is open, the inlet hole 32 of the moving valve plate 3 is vertically connected to the working chamber 13 of the inner cavity, the flow-blocking part of the moving valve plate 3 is vertically connected to the backwash chamber 14, and the drain blind hole 33 of the moving valve plate 3 is vertically connected to the blind chamber 15. The raw water enters the outer cavity 11 of the valve body 1 from the inlet 5, and passes through the inlet hole 32 and the working chamber 13 in sequence. It then enters the tank connected to the valve body 1 through the first filter element interface 16. The tank is equipped with a filter material layer such as activated carbon or quartz sand for water purification. The purified water flows through the central pipe of the tank, passes through the second filter element interface 17 and the backwash chamber 14 in sequence, and finally flows out from the outlet 6, realizing the normal operation of the multi-functional filter valve.

[0059] When in backwash mode, the valve connected to outlet 6 is closed, and the drive device 4 drives the moving valve plate 3 to rotate counterclockwise by 150° (relative to the position of the moving valve plate 3 in normal operation mode), so that the water inlet hole 32 on the moving valve plate 3 is connected vertically to the backwash chamber 14, the second blind hole 35 is connected vertically to the blind chamber 15, and the first blind hole 34 and the drain blind hole 33 are connected vertically to the working chamber 13. The backwash water enters the outer chamber 11 of the valve body 1 from the water inlet 5, and passes through the water inlet hole 32 and the backwash chamber 14 in sequence, and enters the central tube of the tank connected to the valve body 1 through the second filter element interface 17, rinsing the filter material layer from bottom to top. The backwash wastewater enters the working chamber 13 from the first filter element interface 16, and passes through the drain blind hole 33 and the central blind hole 31 in sequence to enter the central drain chamber 12, and finally is discharged through the drain outlet 7, realizing the backwashing of the multi-functional filter valve.

[0060] In forward washing mode, the valve connected to outlet 6 is closed, and the drive device 4 drives the moving valve plate 3 to rotate counterclockwise by 300° (relative to the position of the moving valve plate 3 in normal operation mode). This causes part of the water inlet hole 32 on the moving valve plate 3 to be blocked by the blind cavity 15 and part to be connected to the working cavity 13. The working cavity 13, except for the part connected to the water inlet hole 32, corresponds vertically to the second blind hole 35. The drain blind hole 33 and the first blind hole 34 correspond vertically to the backwash cavity 14. Forward washing water enters the outer cavity 11 of the valve body 1 from the water inlet 5, and passes through the water inlet hole 32 and the working cavity 13 in sequence. It then enters the tank body through the first filter element interface 16. The forward washing water flows from top to bottom through the filter media layer, and then enters the backwash cavity 14 from the central pipe through the second filter element interface 17. It then passes through the drain blind hole 33 and the central blind hole 31 in sequence into the central drain cavity 12, and finally is discharged through the drain outlet 7, thus realizing the forward washing of the multi-functional filter valve.

[0061] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multifunctional filter valve, characterized in that, It includes a valve body, a movable valve plate, and a drive device. The valve body has an inlet, an outlet, and a drain on its side wall. The outlet is connected to a valve during use. The valve body is provided with a coaxial and separated inner chamber and an outer chamber. The outer chamber is connected to the water inlet. The inner chamber includes a central drain chamber and a working chamber, a backwash chamber and a blind chamber distributed circumferentially along the central drain chamber. The central drain chamber is connected to the drain outlet and the backwash chamber is connected to the water outlet. The bottom of the valve body is provided with a first filter element interface and a second filter element interface on the same central axis. The first filter element interface is connected to the working chamber and the second filter element interface is connected to the backwash chamber. The multifunctional filter valve includes a fixed valve plate, which is coaxially fixed to the top end face of the inner cavity. A movable valve plate is located above the fixed valve plate and rotates and seals with the fixed valve plate. The fixed valve plate has a central through hole in its center. The fixed valve plate is provided with a first through hole, a second through hole and a blind plate along the circumference of the central through hole, which are coaxial with the central through hole and are fan-shaped. The central through hole is connected to the central drainage cavity. The first through hole is connected to the first filter element interface. The second through hole is connected to the second filter element interface. The blind plate has the same central angle as the blind cavity and is arranged vertically and vertically. The moving valve plate is coaxially disposed above the inner cavity. The driving device is connected to the moving valve plate to drive the moving valve plate to rotate in the valve body. A central blind hole is provided at the center of the moving valve plate. A water inlet through hole and a fan-shaped drainage blind hole and a flow-blocking part are provided on the moving valve plate around the central blind hole. The drainage blind hole and the flow-blocking part are coaxial with the central blind hole. The central blind hole is connected to the central drainage cavity. The central angle of the drainage blind hole is not greater than the central angle of the blind cavity. The central angle of the flow-blocking part is equal to the central angle of the water inlet through hole, equal to the central angle of the working cavity, and equal to the central angle of the backwash cavity. The flow-blocking part includes a first blind hole, a second blind hole, and a first partition beam disposed between the first blind hole and the second blind hole. A second partition beam is disposed between the first blind hole and the drainage blind hole, and the central angle of the second blind hole is equal to the central angle of the drainage blind hole. The horizontal cross-sectional area of ​​the first through hole is equal to the horizontal cross-sectional area of ​​the water inlet through hole, the horizontal cross-sectional area of ​​the second through hole is equal to the horizontal cross-sectional area of ​​the flow obstruction part, and the horizontal cross-sectional area of ​​the blind plate is equal to the horizontal cross-sectional area of ​​the blind cavity. The water inlet hole penetrates the moving valve plate along the axial direction of the valve body and also penetrates the circumferential surface of the moving valve plate along the radial direction of the valve body. The first through hole corresponds vertically to the working chamber and the first filter element interface, and the second through hole corresponds vertically to the backwash chamber and the second filter element interface.

2. The multifunctional filter valve according to claim 1, characterized in that, The central angle of the blind plate is greater than 0° and less than 120°. The central angles of the first through hole and the second through hole are equal and greater than 120° and less than 180°. The sum of the central angle of the blind plate, the central angle of the first through hole, and the central angle of the second through hole is equal to 360°.

3. A multifunctional filter valve according to claim 2, characterized in that, The central angle of the blind plate is 60°, and the central angles of the first through hole and the second through hole are 150°.

Images