Reversing valve head and backwashing system thereof

Abstract

The utility model discloses a reversing valve head and a backwashing system thereof, comprising: 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] This invention relates to the technical field of water purification equipment, and more particularly to a reversing valve head and its backwashing system. Background Technology

[0002] Traditional dual ultrafiltration water purifiers typically use water purified by one ultrafiltration system to backwash the other, resulting in strong rinsing and good rinsing effect. However, dual ultrafiltration water purifiers usually require multiple pipelines for connection and at least four valves for control. Due to the complexity of the pipeline connections and the large space occupied by the pipelines and valves after installation, the overall size of the unit is large and the space occupied by the unit is excessive. Utility Model Content

[0003] To address the aforementioned issues with the piping and valves in existing dual ultrafiltration water purification products, this paper aims to provide a reversing valve head and its backwashing system. By replacing four valves and complex piping installations with the reversing valve head, the overall size of the machine can be reduced, thus minimizing space occupation.

[0004] The specific technical solution is as follows:

[0005] A reversing valve head includes: a housing, a cavity formed inside the housing, and a raw water inlet, a drain outlet, a first inlet and a second inlet communicating with the cavity respectively;

[0006] A fixing plate is positioned within the cavity, separating the cavity from the drain outlet, the first inlet / outlet, and the second inlet / outlet. The fixing plate has a first opening, a second opening, and a third opening. The first opening communicates with the first inlet / outlet, the second opening communicates with the second inlet / outlet, and the third opening communicates with the drain outlet.

[0007] A movable piece, which is movably disposed within the cavity, has a recessed cavity on it;

[0008] The cavity may block the third port, or connect the first port and the third port, or connect the second port and the third port.

[0009] In the aforementioned reversing valve head, the moving plate has a first notch and a second notch;

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

[0011] When the cavity connects the first port and the third port, the second port is connected to the raw water inlet through the first notch or the second notch;

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

[0013] The aforementioned reversing valve head further includes: a rotating shaft, which is connected to the moving plate, and the rotating shaft drives the moving plate to rotate.

[0014] The aforementioned reversing valve head, wherein the housing further has a channel, the channel having a clean water inlet, a third inlet / outlet, and a fourth inlet / outlet.

[0015] In the aforementioned reversing valve head, an optical coupler sensor is installed on the housing, a light-shielding ring is installed on the rotating shaft, the light-shielding ring covers the optical coupler sensor, and the outer wall of the light-shielding ring is provided with multiple light-transmitting grooves.

[0016] The aforementioned reversing valve head further includes a driving component, which is connected to the rotating shaft via a transmission connection.

[0017] In the aforementioned reversing valve head, at least one snap-fit ​​assembly is provided between the moving plate and the rotating shaft. Each snap-fit ​​assembly includes a snap-fit ​​groove and a snap-fit ​​block that snap into each other. One of the snap-fit ​​groove and the snap-fit ​​block is provided on the moving plate, and the other is provided on the rotating shaft, so that the moving plate snaps into the rotating shaft.

[0018] In the aforementioned reversing valve head, the housing is provided with at least two positioning blocks on the inner wall of the cavity, and the fixed plate is provided with at least one limiting groove. One positioning block is matched with one positioning groove to limit the movement of the fixed plate in its circumferential direction, and the other positioning block abuts against the outer wall of the fixed plate to limit the movement of the fixed plate in its radial direction.

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

[0020] In the aforementioned reversing valve head, the moving plate includes a partition, a connecting part, and a conduction blocking part connected in sequence. The cavity is provided on the connecting part and the conduction blocking part, and a portion of the cavity located on the connecting part communicates with the third port.

[0021] The fixing plate also has a groove;

[0022] When the concave cavity blocks the third opening, the groove communicates with the concave cavity.

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

[0024] The first inlet and outlet are connected to the water inlet of the first filter element, and the second inlet and outlet are connected to the water inlet of the second filter element;

[0025] The outlet of the first filter element is connected to the outlet of the second filter element, or the outlets of the first filter element and the second filter element can directly filter out clean water.

[0026] The positive effects of the above technical solution compared with the existing technology are:

[0027] This invention simplifies the piping and assembly of dual ultrafiltration products, integrating the control valve into a single reversing valve to enable the dual ultrafiltration products to perform normal water production and mutual backwashing. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of a reversing valve head according to the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of a reversing valve head according to the present invention;

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

[0031] Figure 4 This is a cross-sectional view of the structure of a reversing valve head according to the present invention;

[0032] Figure 5 This is a cross-sectional view of the structure of a reversing valve head according to the present invention;

[0033] Figure 6 This is a schematic diagram of the structure of a sealing element in a reversing valve head according to the present invention;

[0034] Figure 7 This is a front view of the structure of the stationary plate in a directional valve head according to the present invention;

[0035] Figure 8 This is a rear view of the structure of the stationary plate in a directional valve head according to the present invention;

[0036] Figure 9 This is a front view of the structure of the moving plate in a directional valve head according to the present invention;

[0037] Figure 10 This is a rear view of the structure of the moving plate in a reversing valve head according to the present invention;

[0038] Figure 11 This is a schematic diagram of the structure of the rotating shaft in a reversing valve head according to the present invention;

[0039] Figure 12 This is a schematic diagram of the structure of a light-shielding ring in a reversing valve head according to the present invention;

[0040] Figure 13 This is a schematic diagram of the structure of a reversing valve head in normal water production mode according to the present invention;

[0041] Figure 14 This is a schematic diagram of the water circuit structure of the backwashing system in normal water production mode according to the present invention;

[0042] Figure 15 This is a schematic diagram of the structure of the reversing valve head in the second filter element flushing the first filter element according to the present invention;

[0043] Figure 16 This is a schematic diagram of the water circuit structure of the backwashing system of the present invention, in which the second filter element washes the first filter element;

[0044] Figure 17 This is a schematic diagram of the structure of the reversing valve head in the first filter element flushing the second filter element according to the present invention;

[0045] Figure 18 This is a schematic diagram of the water circuit structure of the backwashing system of the present invention, which is used to rinse the second filter element from the first filter element.

[0046] In the attached diagram: 1. Housing; 2. Fixed plate; 3. Moving plate; 4. Rotating shaft; 5. Driving component; 6. Channel; 8. Snap-fit ​​assembly; 9. Seal; 10. Reversing valve head; 11. Cavity; 12. Raw water inlet; 13. Drain outlet; 14. First inlet / outlet; 15. Second inlet / outlet; 16. Positioning block; 17. Outer shell; 18. Cover; 19. Sealing ring; 21. First port; 22. Second port; 23. Third port; 24. Limiting groove; 25. Groove; 31. Cavity; 32. First notch; 33. Second notch; 34. Separator; 35. Connecting part; 36. Conductive sealing part; 41. Step; 42. Gasket; 51. First filter element; 52. Second filter element; 61. Clean water inlet; 62. Third inlet / outlet; 63. Fourth inlet / outlet; 71. Optical coupler sensor; 72. Light-shielding ring; 73. Light-transmitting groove; 81. Slot; 82. Block; 91. First sealing part; 92. Second sealing part; 93. Third sealing part; 94. Fourth sealing part. Detailed Implementation

[0047] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the scope of the invention.

[0048] like Figures 1 to 12 As shown, a preferred embodiment of a directional valve head is illustrated, comprising: a housing 1, a fixed plate 2, and a movable plate 3.

[0049] Furthermore, in a preferred embodiment, a cavity 11 is formed inside the housing 1, and the housing 1 has a raw water inlet 12, a drain outlet 13, a first inlet / outlet 14, and a second inlet / outlet 15 that are respectively connected to the cavity 11.

[0050] Furthermore, in a preferred embodiment, the fixing plate 2 is positioned inside the cavity 11, and the fixing plate 2 separates the cavity 11 from the drain outlet 13, the first inlet / outlet 14, and the second inlet / outlet 15. The fixing plate 2 has a first opening 21, a second opening 22, and a third opening 23. The first opening 21 is connected to the first inlet / outlet 14, the second opening 22 is connected to the second inlet / outlet 15, and the third opening 23 is connected to the drain outlet 13.

[0051] Furthermore, in a preferred embodiment, the movable piece 3 is movably disposed within the cavity 11, and the movable piece 3 has a recess 31;

[0052] The concave cavity 31 blocks the third opening 23, or connects the first opening 21 with the third opening 23, or connects the second opening 22 with the third opening 23.

[0053] Furthermore, in a preferred embodiment, the moving piece 3 has a first notch 32 and a second notch 33;

[0054] When the cavity 31 blocks the third opening 23, the first opening 21 is connected to the original water inlet 12 through the first gap 32, and the second opening 22 is connected to the original water inlet 12 through the second gap 33.

[0055] When the concave cavity 31 connects the first opening 21 and the third opening 23, the second opening 22 connects to the original water inlet 12 through the first notch 32 or the second notch 33.

[0056] When the concave cavity 31 connects the second port 22 and the third port 23, the first port 21 connects to the original water inlet 12 through the first notch 32 or the second notch 33.

[0057] Furthermore, in a preferred embodiment, the reversing valve head also includes: a rotating shaft 4, which is connected to the moving plate 3, and the rotating shaft 4 drives the moving plate 3 to rotate.

[0058] Furthermore, in a preferred embodiment, the reversing valve head also includes a drive component 5, which is connected to the rotating shaft 4 in a transmission manner.

[0059] Drive component 5 is a drive motor.

[0060] Furthermore, as a preferred embodiment, the housing 1 also has a channel 6, which has a clean water inlet 61, a third inlet / outlet 62, and a fourth inlet / outlet 63. This can reduce the piping arrangement between the two ultrafiltration units, or shorten the piping length, simplify piping installation, and reduce the space occupied by the piping.

[0061] Both moving piece 3 and fixed piece 2 are ceramic parts.

[0062] Furthermore, as a preferred embodiment, an optical coupler 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 optical coupler sensor 71, and the outer wall of the light-shielding ring 72 is provided with a plurality of light-transmitting grooves 73.

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

[0064] Furthermore, as a preferred embodiment, at least one snap-fit ​​group 8 is provided between the moving piece 3 and the rotating shaft 4. Each snap-fit ​​group 8 includes a snap-fit ​​groove 81 and a snap-fit ​​block 82 that snap into each other. One of the snap-fit ​​groove 81 and the snap-fit ​​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 snaps into the rotating shaft 3.

[0065] Preferably, the outer periphery of the moving piece 3 is provided with multiple slots 81, and the outer periphery of the rotating shaft 4 is provided with multiple blocks 82. The multiple slots 81 are respectively engaged with the multiple blocks 82. Since the engagement 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 force of the multiple engagement groups 8 is located on the outer periphery of the fixed piece 2, which can keep the fixed piece and the moving piece 3 in balance and also improve the sealing effect of the sealing element 9.

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

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

[0068] Multiple positioning blocks 16 can also be configured to limit the movement of the fixed piece 3 along its circumferential and radial directions by setting multiple positioning blocks 16 to limit the movement of the fixed piece 3 along its circumferential and radial directions.

[0069] Furthermore, in a preferred embodiment, the movable piece 3 includes a partition 34, a connecting part 35, and a conduction and blocking part 36 connected in sequence. A cavity 31 is provided on the connecting part 35 and the conduction and blocking part 36, and a portion of the cavity 31 on the connecting part 35 communicates with the third port 23.

[0070] The partition, connecting part and the conduction and sealing part are integrated into one structure.

[0071] Furthermore, in a preferred embodiment, the fixing piece 2 also has a groove 25;

[0072] When the concave cavity 31 blocks the third opening 23, the groove 25 is connected to the concave cavity 31.

[0073] Furthermore, as a preferred embodiment, the groove 25, the first opening 21 and the second opening 22 on the fixed piece 2 are distributed along the circumferential direction of the fixed piece 2 and are distributed at equal intervals.

[0074] The third opening 23 on the fixed piece 2 is located at the center of the fixed piece, and the groove 25, the first opening 21 and the second opening 22 surround the outer periphery of the third opening 23.

[0075] Furthermore, in a preferred embodiment, a sealing element 9 is provided between the fixed piece 2 and the housing 1. The sealing element 9 includes a first sealing part 91, a second sealing part 92 and a third sealing part 93. The first sealing part 91 surrounds the periphery of the first opening 21, the second sealing part 92 surrounds the periphery of the second opening 22, and the third sealing part 93 surrounds the periphery of the third opening 23. The first sealing part 91 seals the first opening 21 and the first inlet / outlet 14, the second sealing part 92 seals the second opening 22 and the second inlet / outlet 15, and the third sealing part 93 seals the third opening 23 and the drain outlet 13.

[0076] The seal 9 also includes a fourth sealing part 94, which surrounds the periphery of the groove 25, the groove 25 being located on one side of the fixed piece 2, and the fourth sealing part 94 being located on the other side of the fixed piece 2.

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

[0078] The fourth sealing part 94 is provided to support the portion of the fixed piece 2 where the groove 25 is provided, so that the fixed piece 2 and the sealing member 9 are kept in balance, which can improve the sealing performance between the fixed piece 2 and the housing 1.

[0079] Preferably, the housing 1 includes an outer shell 17 and a cover 18 connected to each other. The outer shell 17 and the cover 18 form a cavity 11. The outer shell 17 has a raw water inlet 12, a drain outlet 13, a first inlet / outlet 14, and a second inlet / outlet 15. The rotating shaft 4 passes 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 coefficient of friction, which can reduce the rotational torque.

[0081] The above are merely preferred embodiments of the present invention and are not intended to limit the implementation methods and protection scope of the present invention.

[0082] In addition to the above, the present invention also has the following embodiments:

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

[0084] The first inlet / outlet 14 is connected to the water inlet of the first filter element 51, and the second inlet / outlet 15 is connected to the water inlet of the second filter element 52.

[0085] The outlet of the first filter element 51 is connected to the outlet of the second filter element 52, or the outlet of the first filter element 51 and the outlet of the second filter element 52 can directly filter out clean water.

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

[0087] Water enters through the raw water inlet 12 and flows into the cavity 11 of the housing 1. It then splits into two water paths. In one path, the water in the cavity 11 flows sequentially through the first notch 32, the first through-hole 21, and the first inlet / outlet 14 into the inlet of the first filter element 51. After being filtered by the first filter element 51, the filtered water is discharged from the outlet of the first filter element 51 and then enters the third inlet / outlet 62. In the other path, the water in the cavity 11 flows sequentially through the second notch 33, the second through-hole 22, and the second inlet / outlet 15 into the inlet of the second filter element 52. After being filtered by the second filter element 52, the filtered water is discharged from the outlet of the second filter element 52 and then enters the fourth inlet / outlet 63. The water from the third inlet / outlet 62 and the fourth inlet / outlet 63 are combined and discharged from the clean water outlet 61.

[0088] The second filter element 52 of the present invention flushes the first filter element 51 in the following manner: the cavity 31 is connected to the first port 21 and the third port 23;

[0089] Water enters through the raw water inlet and flows into the cavity 11 of the housing 1. It then passes through the first notch 32, the second through port 22, and the second inlet / outlet 15 before entering the inlet of the second filter element 52. After being filtered by the second filter element 52, the filtered water is discharged from the outlet of the second filter element 52 and then enters the fourth inlet / outlet 63. Due to the blockage of the clean water outlet 61, the filtered water is discharged from the third inlet / outlet 62 and then enters from the outlet of the first filter element 51 to rinse the first filter element 51. The wastewater after rinsing is discharged from the inlet of the first filter element 51 and then passes through the first inlet / outlet 14, the first through port 21, the cavity 31, and the third through port 23 in sequence, and finally is discharged from the drain port 13, completing the rinsing of the first filter element 51.

[0090] The first filter element 51 of the present invention flushes the second filter element 52 in the following manner: the cavity 31 is connected to the second port 22 and the third port 23;

[0091] Water enters through the raw water inlet and flows into the cavity 11 of the housing 1. It then passes through the second notch 33, the first through port 21, and the first inlet / outlet 14 before entering the inlet of the first filter element 51. After being filtered by the first filter element 51, the filtered water is discharged from the outlet of the first filter element 51 and then enters the third inlet / outlet 62. Due to the blockage of the clean water outlet 61, the filtered water is discharged from the fourth inlet / outlet 63 and then enters from the outlet of the second filter element 52 to rinse the second filter element 52. The wastewater after rinsing is discharged from the inlet of the second filter element 52 and then passes through the second inlet / outlet 15, the second through port 22, the cavity 31, and the third through port 23 in sequence, finally being discharged from the drain port 13, thus completing the rinsing of the second filter element 52.

[0092] This invention simplifies the piping and assembly of dual ultrafiltration products, integrating the control valve into a single reversing valve to enable the dual ultrafiltration products to perform normal water production and mutual backwashing.

[0093] The above description is merely a preferred embodiment of the present invention and does not limit the implementation and protection scope of the present invention. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. A reversing valve head, characterized in that, The utility model relates to a valve head, including: A shell is formed with a cavity in the shell, and the shell has a raw water inlet, a drain outlet, a first inlet and outlet and a second inlet and outlet which respectively communicate with the cavity; A fixed sheet is positioned in the cavity, the fixed sheet separates the cavity from the drain outlet, the first inlet and outlet and the second inlet and outlet, and the fixed sheet has a first through hole, a second through hole and a third through hole, the first through hole communicates with the first inlet and outlet, the second through hole communicates with the second inlet and outlet, and the third through hole communicates with the drain outlet; A movable sheet is movably arranged in the cavity, and the movable sheet has a recess; The recess blocks the third through hole, or communicates the first through hole with the third through hole, or communicates the second through hole with the third through hole.

2. A reversing valve head according to claim 1, characterised in that The movable sheet has a first notch and a second notch; When the recess blocks the third through hole, the first through hole communicates with the raw water inlet through the first notch, and the second through hole communicates with the raw water inlet through the second notch; When the recess communicates the first through hole with the third through hole, the second through hole communicates with the raw water inlet through the first notch or the second notch; When the recess communicates the second through hole with the third through hole, the first through hole communicates with the raw water inlet through the first notch or the second notch.

3. The reversing valve head of claim 1, wherein, Further comprising: A rotating shaft is connected with the movable sheet, and the rotating shaft drives the movable sheet to rotate.

4. The reversing valve head of claim 1, wherein, The shell further has a channel, and the channel has a purified water outlet, a third inlet and outlet and a fourth inlet and outlet; 5. The reversing valve head of claim 3, wherein, The shell is provided with an optical coupling sensor, the rotating shaft is provided with a light shielding ring, the light shielding ring covers the optical coupling sensor, and the outer wall of the light shielding ring is provided with a plurality of light transmission grooves.

6. The reversing valve head of claim 3, wherein, Further comprising a driving member in transmission connection with the rotating shaft.

7. The reversing valve head of claim 3, wherein, At least one clamping group is arranged between the movable sheet and the rotating shaft, each clamping group comprises a clamping groove and a clamping block which are clamped with each other, one of the clamping groove and the clamping block is arranged on the movable sheet, and the other is arranged on the rotating shaft, so that the movable sheet and the rotating shaft are clamped.

8. The reversing valve head of claim 1, wherein, At least two positioning blocks are arranged on the inner wall of the cavity of the shell, and at least one limiting groove is arranged on the fixed sheet, one positioning block and one limiting groove are in limiting cooperation, so as to limit the circumferential movement of the fixed sheet, and the other positioning block abuts against the outer wall of the fixed sheet, so as to limit the radial movement of the fixed sheet; The plurality of positioning blocks are equidistantly arranged along the circumferential direction of the fixed sheet.

9. The reversing valve head of claim 1, wherein, The movable sheet comprises a separation part, a connecting part and a conductive blocking part which are connected in sequence, the recess is arranged on the connecting part and the conductive blocking part, and the part of the recess on the connecting part communicates with the third through hole; The fixed sheet further has a recess; When the recess blocks the third through hole, the recess communicates with the recess.

10. A backwash system characterized by, The utility model relates to a valve head, including: The first inlet and outlet communicate with the water inlet of the first filter element, and the second inlet and outlet communicate with the water inlet of the second filter element; The water outlet of the first filter core is communicated with the water outlet of the second filter core, or the water outlet of the first filter core and the water outlet of the second filter core directly filter out clean water.

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