Reversing valve head and backwashing system thereof

Abstract

The invention discloses a reversing valve head and a backwashing system thereof, and the reversing valve head comprises: a housing, a cavity is formed in the housing, and the housing is provided with a raw water port, a water outlet, a first inlet / outlet, and a second inlet / outlet which are respectively communicated with the cavity; the fixed piece is positioned in the cavity, the cavity is separated from the water outlet, the first in-out opening and the second in-out opening by the fixed piece, a first through opening, a second through opening and a third through opening are formed in the fixed piece, the first through opening is communicated with the first in-out opening, the second through opening is communicated with the second in-out opening, and the third through opening is communicated with the water outlet; the moving plate is movably arranged in the cavity, and a concave cavity is formed in the moving plate; and the concave cavity blocks the third through opening, or communicates the first through opening with the third through opening, or communicates the second through opening with the third through opening. Four valves are replaced by the reversing valve head, and complicated pipelines are laid, so that the size of the whole machine is reduced, and the occupied space is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of water purification equipment, and particularly to a reversing valve head and its backwashing system. Background Art

[0002] In traditional dual ultrafiltration water purification products, during flushing, the water purified by one ultrafilter is usually used to flush the other ultrafilter in the reverse direction. The flushing intensity is high and the flushing effect is good. However, dual ultrafiltration water purification products usually require multiple pipelines to be connected and at least 4 valves to be controlled. Due to the complex pipeline connection, after the valves are installed, the occupied space of the pipelines and valves is large, resulting in a large overall size of the machine and excessive occupied space of the whole machine. Summary of the Invention

[0003] Aiming at the above problems of pipelines and valves in existing dual ultrafiltration water purification products, the present invention aims to provide a reversing valve head and its backwashing system, which replaces 4 valves and complex pipeline laying through the reversing valve head, reduces the overall size of the machine and decreases the space occupation.

[0004] The specific technical solutions are as follows:

[0005] A reversing valve head, comprising: a housing, a cavity is formed in the housing, and the housing has a raw water inlet, a drain outlet, a first inlet and outlet, and a second inlet and outlet respectively communicated with the cavity;

[0006] A stationary piece, the stationary piece is positioned in the cavity, the stationary piece separates the cavity from the drain outlet, the first inlet and outlet, and the second inlet and outlet, and the stationary piece has a first through port, a second through port and a third through port, the first through port is communicated with the first inlet and outlet, the second through port is communicated with the second inlet and outlet, and the third through port is communicated with the drain outlet;

[0007] A moving piece, the moving piece is movably arranged in the cavity, and the moving piece has a concave cavity;

[0008] Wherein, the concave cavity blocks the third through port, or communicates the first through port with the third through port, or communicates the second through port with the third through port.

[0009] For the above reversing valve head, wherein, the moving piece has a first notch and a second notch;

[0010] When the concave cavity blocks the third through port, the first through port is communicated with the raw water inlet through the first notch, and the second through port is communicated with the raw water inlet through the second notch;

[0011] When the concave cavity communicates the first through port with the third through port, the second through port is communicated with the raw water inlet through the first notch or the second notch;

[0012] When the concave cavity connects the second through port and the third through port, the first through port is connected to the original water inlet through the first notch or the second notch;

[0013] The above-mentioned reversing valve head, further comprising: a rotating shaft, the rotating shaft is connected to the moving piece, and the rotating shaft drives the moving piece to rotate.

[0014] The above-mentioned reversing valve head, wherein the housing further has a channel, and the channel has a purified water port, a third inlet and outlet, and a fourth inlet and outlet.

[0015] The above-mentioned reversing valve head, wherein an opto-coupler sensor is installed on the housing, a light-shielding ring is installed on the rotating shaft, the light-shielding ring covers the opto-coupler sensor, and a plurality of light-transmitting grooves are provided on the outer wall of the light-shielding ring.

[0016] The above-mentioned reversing valve head, further comprising a driving member, the driving member is in transmission connection with the rotating shaft.

[0017] The above-mentioned reversing valve head, wherein at least one clamping group is provided between the moving piece and the rotating shaft, and each clamping group includes a clamping groove and a clamping block that are clamped with each other. One of the clamping groove and the clamping block is provided on the moving piece, and the other is provided on the rotating shaft to clamp the moving piece and the rotating shaft.

[0018] The above-mentioned reversing valve head, wherein at least two positioning blocks are provided on the inner wall of the housing located in the cavity, at least one limiting groove is provided on the stationary piece, and one positioning block is in limiting cooperation with one positioning groove to limit the circumferential movement of the stationary piece, and the other positioning block abuts against the outer wall of the stationary piece to limit the radial movement of the stationary piece;

[0019] The plurality of positioning blocks are arranged at equal intervals in the circumferential direction of the stationary piece.

[0020] The above-mentioned reversing valve head, wherein the moving piece includes a separating portion, a connecting portion and a conducting and blocking portion connected in sequence, the concave cavity is provided on the connecting portion and the conducting and blocking portion, and the part of the concave cavity located on the connecting portion is communicated with the third through port;

[0021] The stationary piece further has a groove;

[0022] When the concave cavity blocks the third through port, the groove is communicated with the concave cavity.

[0023] A backwashing system, comprising the reversing valve head according to any one of the above, further comprising: a first filter element and a second filter element;

[0024] The first inlet and outlet is communicated with the water inlet of the first filter element, and the second inlet and outlet is communicated with the water inlet of the second filter element;

[0025] The water outlet of the first filter element is communicated with the water outlet of the second filter element, or the water outlets of the first filter element and the second filter element directly filter out purified water.

[0026] The positive effects of the above technical solution compared with the prior art are as follows:

[0027] The present invention simplifies the pipeline and assembly of the double ultrafiltration product, integrates the control valve into a reversing valve, and realizes the functions of normal water production and mutual backwashing of the double ultrafiltration product. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic structural diagram of a reversing valve head of the present invention;

[0029] Figure 2 It is a schematic structural diagram of a reversing valve head of the present invention;

[0030] Figure 3 It is an exploded structural diagram of a reversing valve head of the present invention;

[0031] Figure 4 It is a structural sectional view of a reversing valve head of the present invention;

[0032] Figure 5 It is a structural sectional view of a reversing valve head of the present invention;

[0033] Figure 6 It is a schematic structural diagram of a seal in a reversing valve head of the present invention;

[0034] Figure 7 It is a front view of a stationary plate in a reversing valve head of the present invention;

[0035] Figure 8 It is a rear view of a stationary plate in a reversing valve head of the present invention;

[0036] Figure 9 It is a front view of a movable plate in a reversing valve head of the present invention;

[0037] Figure 10 It is a rear view of a movable plate in a reversing valve head of the present invention;

[0038] Figure 11 It is a schematic structural diagram of a rotating shaft in a reversing valve head of the present invention;

[0039] Figure 12 It is a schematic structural diagram of a light-shielding ring in a reversing valve head of the present invention;

[0040] Figure 13 It is a schematic structural diagram of a reversing valve head in the normal water production mode of the present invention;

[0041] Figure 14 This is a schematic diagram of the waterway structure of an anti-washing system of the present invention in the normal water production mode;

[0042] Figure 15 This is a schematic diagram of the structure of a reversing valve head of the present invention when the second filter element flushes the first filter element;

[0043] Figure 16 This is a schematic diagram of the waterway structure of an anti-washing system of the present invention when the second filter element flushes the first filter element;

[0044] Figure 17 This is a schematic diagram of the structure of a reversing valve head of the present invention when the first filter element flushes the second filter element;

[0045] Figure 18 This is a schematic diagram of the waterway structure of an anti-washing system of the present invention when the first filter element flushes the second filter element;

[0046] In the drawings: 1. Housing; 2. Fixed piece; 3. Movable piece; 4. Rotating shaft; 5. Driving member; 6. Channel; 8. Clamping group; 9. Sealing member; 10. Reversing valve head; 11. Cavity; 12. Raw water inlet; 13. Drainage port; 14. First inlet and outlet; 15. Second inlet and outlet; 16. Positioning block; 17. Outer shell; 18. Cover body; 19. Sealing ring; 21. First through port; 22. Second through port; 23. Third through port; 24. Limiting groove; 25. Groove; 31. Concave cavity; 32. First notch; 33. Second notch; 34. Partition part; 35. Connecting part; 36. Conducting and blocking part; 41. Step; 42. Gasket; 51. First filter element; 52. Second filter element; 61. Clean water outlet; 62. Third inlet and outlet; 63. Fourth inlet and outlet; 71. Opto-coupler sensor; 72. Shading ring; 73. Light-transmitting groove; 81. Card slot; 82. Card block; 91. First sealing part; 92. Second sealing part; 93. Third sealing part; 94. Fourth sealing part. Detailed implementation manners

[0047] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but it is not limited to the present invention.

[0048] As Figures 1 to 12 shown, a reversing valve head of a preferred embodiment is shown, including: a housing 1, a fixed piece 2, and a movable piece 3.

[0049] Further, as a preferred embodiment, a cavity 11 is formed in the housing 1, and the housing 1 is provided with a raw water inlet 12, a drainage port 13, a first inlet and outlet 14, and a second inlet and outlet 15 that are respectively communicated with the cavity 11.

[0050] Further, as a preferred embodiment, the stationary plate 2 is positioned within the cavity 11. The stationary plate 2 separates the cavity 11 from the drain port 13, the first inlet / outlet 14, and the second inlet / outlet 15. The stationary plate 2 is provided with a first through port 21, a second through port 22, and a third through port 23. The first through port 21 communicates with the first inlet / outlet 14, the second through port 22 communicates with the second inlet / outlet 15, and the third through port 23 communicates with the drain port 13.

[0051] Further, as a preferred embodiment, the moving plate 3 is movably disposed within the cavity 11. The moving plate 3 is provided with a concave cavity 31.

[0052] Wherein, the concave cavity 31 blocks the third through port 23, or communicates the first through port 21 with the third through port 23, or communicates the second through port 22 with the third through port 23.

[0053] Further, as a preferred embodiment, the moving plate 3 is provided with a first notch 32 and a second notch 33.

[0054] When the concave cavity 31 blocks the third through port 23, the first through port 21 communicates with the raw water port 12 through the first notch 32, and the second through port 22 communicates with the raw water port 12 through the second notch 33.

[0055] When the concave cavity 31 communicates the first through port 21 with the third through port 23, the second through port 22 communicates with the raw water port 12 through the first notch 32 or the second notch 33.

[0056] When the concave cavity 31 communicates the second through port 22 with the third through port 23, the first through port 21 communicates with the raw water port 12 through the first notch 32 or the second notch 33.

[0057] Further, as a preferred embodiment, the reversing valve head further includes: a rotating shaft 4. The rotating shaft 4 is connected to the moving plate 3, and the rotating shaft 4 drives the moving plate 3 to rotate.

[0058] Further, as a preferred embodiment, the reversing valve head further includes a driving member 5. The driving member 5 is in transmission connection with the rotating shaft 4.

[0059] The driving member 5 is a driving motor. [[ID=)28]]

[0060] Further, as a preferred embodiment, the housing 1 is further provided with a channel 6. The channel 6 is provided with a purified water port 61, a third inlet / outlet 62, and a fourth inlet / outlet 63. It can reduce the pipeline layout between two ultrafiltrations, or shorten the length of the pipeline, simplify the pipeline laying, and reduce the space occupied by the pipeline.

[0061] Both the moving plate 3 and the stationary plate 2 are ceramic parts.

[0062] Further, as a preferred embodiment, an optocoupler sensor 71 is installed on the housing 1, and a light-shielding ring 72 is installed on the rotating shaft 4. The light-shielding ring 72 covers the optocoupler sensor 71, and a plurality of light-transmitting grooves 73 are provided on the outer wall of the light-shielding ring 72.

[0063] The optocoupler sensor 71 can receive signals, control the rotation of the drive motor, and adjust the relative position of the moving piece 3 and the fixed piece 2, thereby switching the water channel.

[0064] Further, as a preferred embodiment, at least one clamping group 8 is provided between the moving piece 3 and the rotating shaft 4. Each clamping group 8 includes a clamping groove 81 and a clamping block 82 that are clamped to each other. One of the clamping groove 81 and the clamping block 82 is provided on the moving piece 3, and the other is provided on the rotating shaft 4, so that the moving piece 4 and the rotating shaft 3 are clamped.

[0065] Preferably, a plurality of clamping grooves 81 are provided on the outer periphery of the moving piece 3, and a plurality of clamping blocks 82 are provided on the outer periphery of the rotating shaft 4. The plurality of clamping grooves 81 are respectively clamped with the plurality of clamping blocks 82. Since the clamping group 8 is located on the outer periphery of the fixed piece 2 and the moving piece 3 abuts against the fixed piece 2, the abutting forces of the plurality of clamping groups 8 are located on the outer periphery of the fixed piece 2, which can keep the fixed piece and the moving piece 3 balanced and also improve the sealing effect of the seal 9.

[0066] Further, as a preferred embodiment, at least two positioning blocks 16 are provided on the inner wall of the housing 1 located in the cavity 11, and at least one limiting groove 24 is provided on the fixed piece 2. One positioning block 16 is in limiting cooperation with one limiting groove 24 to limit the circumferential movement of the fixed piece 2, and the other positioning block 16 abuts against the outer wall of the fixed piece 2 to limit the radial movement of the fixed piece 2.

[0067] Further, as a preferred embodiment, the plurality of positioning blocks 16 are arranged at equal intervals in the circumferential direction of the fixed piece 2.

[0068] It is also possible to provide a limiting structure in which a plurality of positioning blocks 16 are respectively in contact with a plurality of limiting grooves 24 to limit the circumferential and radial movement of the fixed piece 3.

[0069] Further, as a preferred embodiment, the moving piece 3 includes a partition portion 34, a connecting portion 35, and a conduction and blocking portion 36 that are connected in sequence. A concave cavity 31 is provided on the connecting portion 35 and the conduction and blocking portion 36, and a part of the concave cavity 31 located on the connecting portion 35 is communicated with the third through port 23.

[0070] The partition portion, the connecting portion, and the conduction and blocking portion are of an integral structure.

[0071] Further, as a preferred embodiment, the fixed piece 2 further has a groove 25;

[0072] When the concave cavity 31 blocks the third through port 23, the groove 25 is communicated with the concave cavity 31.

[0073] Further, as a preferred embodiment, the grooves 25, the first through port 21, and the second through port 22 on the stationary plate 2 are distributed along the circumferential direction of the stationary plate 2 and are equally spaced.

[0074] The third through port 23 on the stationary plate 2 is provided at the center of the stationary plate, and the grooves 25, the first through port 21, and the second through port 22 surround the outer periphery of the third through port 23.

[0075] Further, as a preferred embodiment, a seal 9 is provided between the stationary plate 2 and the housing 1. The seal 9 includes: a first seal portion 91, a second seal portion 92, and a third seal portion 93. The first seal portion 91 surrounds the circumferential side of the first through port 21, the second seal portion 92 surrounds the circumferential side of the second through port 22, and the third seal portion 93 surrounds the circumferential side of the third through port 23. The first seal portion 91 seals the first through port 21 and the first inlet / outlet 14, the second seal portion 92 seals the second through port 22 and the second inlet / outlet 15, and the third seal portion 93 seals the third through port 23 and the drain port 13.

[0076] The seal 9 further includes: a fourth seal portion 94. The fourth seal portion 94 surrounds the circumferential side of the groove 25. The groove 25 is provided on one side of the stationary plate 2, and the fourth seal portion 94 is located on the other side of the stationary plate 2.

[0077] The first seal portion 91, the second seal portion 92, and the fourth seal portion 94 are distributed on the outer periphery of the third seal portion 93. The first seal portion 91, the second seal portion 92, and the fourth seal portion 94 are equally spaced on the outer periphery of the third seal portion 93.

[0078] The fourth seal portion 94 is provided to support the part of the stationary plate 2 where the groove 25 is provided, so as to keep the balance between the stationary plate 2 and the seal 9, and can improve the sealing performance between the stationary plate 2 and the housing 1.

[0079] Preferably, the housing 1 includes a housing 17 and a cover 18 connected to each other. A cavity 11 is formed inside the housing 17 and the cover 18. The housing 17 has a raw water inlet 12, a drain port 13, a first inlet / outlet 14, and a second inlet / outlet 15. The rotating shaft 4 penetrates through the cover 18, and a sealing ring 19 is provided between the rotating shaft 4 and the cover 18.

[0080] The rotating shaft 4 has a step 41, and a gasket 42 is provided between the step 41 and the cover 18. The gasket 42 has a very small friction coefficient and can reduce the rotation torque.

[0081] The above are only preferred embodiments of the present invention, and do not limit the implementation manners and protection scope of the present invention accordingly.

[0082] The present invention further has the following implementation manners on the above basis:

[0083] In a further embodiment of the present invention, please continue to refer to Figures 13 to 18As shown in the figure, a backwashing system includes a reversing valve head 10, and also includes: a first filter element 51 and a second filter element 52;

[0084] The first inlet and outlet 14 is communicated with the water inlet of the first filter element 51, and the second inlet and outlet 15 is communicated with the water inlet of the second filter element 52;

[0085] The water outlet of the first filter element 51 is communicated with the water outlet of the second filter element 52, or the water outlets of the first filter element 51 and the second filter element 52 directly filter out clean water.

[0086] The normal water production mode of the present invention: the concave cavity 31 blocks the third through port 23;

[0087] Water enters from the raw water port 12 and enters the cavity 11 of the housing 1, and is divided into two water paths. One water path is that the water in the cavity 11 sequentially passes through the first notch 32, the first through port 21, and the first inlet and outlet 14 to enter the water inlet of the first filter element 51. After being filtered by the first filter element 51, the filtered water is discharged from the water outlet of the first filter element 51 and then enters the third inlet and outlet 62; the other water path is that the water in the cavity 11 sequentially passes through the second notch 33, the second through port 22, and the second inlet and outlet 15 to enter the water inlet of the second filter element 52. After being filtered by the second filter element 52, the filtered water is discharged from the water outlet of the second filter element 52 and then enters the fourth inlet and outlet 63; the water from the third inlet and outlet 62 and the fourth inlet and outlet 63 is combined and discharged from the clean water port 61.

[0088] The mode in which the second filter element 52 of the present invention flushes the first filter element 51: the concave cavity 31 communicates the first through port 21 with the third through port 23;

[0089] Raw water enters and enters the cavity 11 of the housing 1, sequentially passes through the first notch 32, the second through port 22, and the second inlet and outlet 15, and then enters the water inlet of the second filter element 52. After being filtered by the second filter element 52, the filtered water is discharged from the water outlet of the second filter element 52 and then enters the fourth inlet and outlet 63. Since the clean water port 61 is blocked, the filtered water is discharged from the third inlet and outlet 62, then enters from the water outlet of the first filter element 51 to flush the first filter element 51. The waste water after flushing is discharged from the water inlet of the first filter element 51, then sequentially passes through the first inlet and outlet 14, the first through port 21, the concave cavity 31, and the third through port 23, and finally is discharged from the drain port 13 to complete the flushing of the first filter element 51.

[0090] The mode in which the first filter element 51 of the present invention flushes the second filter element 52: the concave cavity 31 communicates the second through port 22 with the third through port 23;

[0091] The raw water inlet enters the cavity 11 of the housing 1, and successively passes through the second notch 33, the first through port 21, and the first inlet and outlet 14, and then enters the water inlet of the first filter element 51. After being filtered by the first filter element 51, the filtered water is discharged from the water outlet of the first filter element 51, and then enters the third inlet and outlet 62. Since the purified water port 61 is blocked, the filtered water is discharged from the fourth inlet and outlet 63, and then enters from the water outlet of the second filter element 52 to flush the second filter element 52. The waste water after flushing is discharged from the water inlet of the second filter element 52, and then successively passes through the second inlet and outlet 15, the second through port 22, the concave cavity 31, and the third through port 23, and finally is discharged from the drain port 13, completing the flushing of the second filter element 52.

[0092] The present invention simplifies the pipeline and assembly of the double ultrafiltration product, integrates the control valve into a reversing valve, and realizes the functions of normal water production and mutual backwashing of the double ultrafiltration product.

[0093] The above are only the preferred embodiments of the present invention, and do not limit the implementation manners and protection scope of the present invention. For those skilled in the art, it should be realized that all the equivalent replacements and obvious changes made by using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A reversing valve head, characterized in that, Comprising: A housing, within which a cavity is formed. The housing has a raw water inlet, a drain outlet, a first inlet / outlet, and a second inlet / outlet that are respectively in communication with the cavity. A stationary plate positioned within the cavity. The stationary plate separates the cavity from the drain outlet, the first inlet / outlet, and the second inlet / outlet. The stationary plate has a first through-port, a second through-port, and a third through-port. The first through-port is in communication with the first inlet / outlet, the second through-port is in communication with the second inlet / outlet, and the third through-port is in communication with the drain outlet. A movable plate movably disposed within the cavity. The movable plate has a concave cavity. Wherein, the concave cavity blocks the third through-port, or communicates the first through-port with the third through-port, or communicates the second through-port with the third through-port.

2. The reversing valve head according to claim 1, wherein, The movable plate has a first notch and a second notch. When the concave cavity blocks the third through-port, the first through-port is in communication with the raw water inlet through the first notch, and the second through-port is in communication with the raw water inlet through the second notch. When the concave cavity communicates the first through-port with the third through-port, the second through-port is in communication with the raw water inlet through the first notch or the second notch. When the concave cavity communicates the second through-port with the third through-port, the first through-port is in communication with the raw water inlet through the first notch or the second notch.

3. The reversing valve head according to claim 1, characterized in that, Further comprising: A rotating shaft connected to the movable plate, and the rotating shaft drives the movable plate to rotate.

4. The reversing valve head according to claim 1, wherein, The housing also has a channel, and the channel has a purified water inlet, a third inlet / outlet, and a fourth inlet / outlet.

5. The reversing valve head according to claim 3, characterized in that, An opto-coupler sensor is installed on the housing, and a light-shielding ring is installed on the rotating shaft. The light-shielding ring shields the opto-coupler sensor, and a plurality of light-transmitting grooves are provided on the outer wall of the light-shielding ring.

6. The commutating valve head according to claim 3, wherein, Further comprising a driving member, and the driving member is in transmission connection with the rotating shaft.

7. The commutating valve head according to claim 3, wherein At least one clamping group is provided between the movable plate and the rotating shaft. Each clamping group includes a clamping groove and a clamping block that are clamped with each other. One of the clamping groove and the clamping block is provided on the movable plate, and the other is provided on the rotating shaft to clamp the movable plate and the rotating shaft.

8. The reversing valve head according to claim 1, characterized in that, At least two positioning blocks are provided on the inner wall of the housing at the cavity. At least one limiting groove is provided on the stationary plate. One positioning block is in limiting cooperation with one limiting groove to limit the circumferential movement of the stationary plate, and the other positioning block abuts against the outer wall of the stationary plate to limit the radial movement of the stationary plate. The plurality of positioning blocks are arranged at equal intervals in the circumferential direction of the stationary plate.

9. The reversing valve head according to claim 1, characterized in that, The movable plate includes a separating portion, a connecting portion, and a conducting / blocking portion that are connected in sequence. The concave cavity is provided on the connecting portion and the conducting / blocking portion, and the part of the concave cavity on the connecting portion is in communication with the third through-port. The stationary plate also has a groove. When the concave cavity blocks the third through-port, the groove is in communication with the concave cavity.

10. An anti-washing system, characterized in that, Comprising the reversing valve head according to any one of claims 1 to 9, and further comprising: a first filter element and a second filter element. The first inlet / outlet is in communication with the water inlet of the first filter element, and the second inlet / outlet is in communication with the water inlet of the second filter element. The water outlet of the first filter element is communicated with the water outlet of the second filter element, or the water outlets of the first filter element and the second filter element directly filter out clean water.

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