Water-passage structure for water treatment, and water treatment device

Abstract

A water-passage structure for water treatment, and a water treatment device. The water-passage structure for water treatment comprises a valve body (1) and a movable valve plate (2), wherein the valve body (1) is provided with a water inlet (3) and a water outlet (4), and has an outer valve cavity (7) and an inner valve cavity (6) therein; the movable valve plate (2) is located in the inner valve cavity (6) and comprises a large-diameter cylinder section (201) and a small-diameter cylinder section (202); an annular water-passage channel (206) is formed between the large-diameter cylinder section (201) and the small-diameter cylinder section (202); a first valve plate water-passage hole (204), a second valve plate water-passage hole (205) and a water-passage notch (203) are provided on a cylinder wall of the large-diameter cylinder section (201); a first filter element interface (13) for connecting to a treatment tank is provided at the bottom of the valve body (1), the first filter element interface (13) being in communication with the water-passage channel (206); an inner cylinder is coaxially supported in the first filter element interface (13); a second filter element interface (14) for connecting to a central pipe in the treatment tank is formed on the inner cylinder; and the inner cylinder vertically runs through an inner space of the movable valve plate (2).

Description

Water treatment water passing structure and water treatment device TECHNICAL FIELD

[0001] The present application belongs to the technical field of water treatment, and particularly relates to a water treatment water passing structure and a water treatment device. BACKGROUND

[0002] Water treatment systems usually use planar control valves to switch flow channels. For example, the control valve of a filtration system needs to realize the functions of filtration, backwashing, forward flushing, etc.; and the control valve of a softening system needs to realize the functions of softening, backwashing, regeneration, forward flushing, etc.

[0003] The structure of the control valve of the filtration system is shown in the multifunctional filter valve disclosed in the Chinese patent with the authorized announcement number CN219299991U, and the structure of the control valve of the softening system is shown in the multifunctional softening valve disclosed in the Chinese patent with the authorized announcement number CN218954102U. According to the contents disclosed in the two patents, no matter the control valve of the filtration system or the control valve of the softening system, the bottom of the valve body is provided with a first filter core interface for communicating with the treatment tank body and a second filter core interface for communicating with the central pipe in the treatment tank body. Since multiple chambers are arranged in the valve body, and water flow needs to be switched in different chambers, the chambers in the valve body cannot be completely connected with the first filter core interface and the second filter core interface below the chambers, which leads to that the effective water passing area of the corresponding chamber from the first filter core interface and the second filter core interface is smaller than the horizontal sectional area of the first filter core interface and the second filter core interface, thereby affecting the water treatment efficiency. SUMMARY

[0004] The present application aims to provide a water treatment water passing structure which can be applied in the water treatment device of the filtration system and the water treatment device of the softening system, and solve the technical problem of low water treatment efficiency of the existing control valve; and the present application also aims to provide a water treatment device with small volume and high water treatment efficiency.

[0005] To solve the above problems, the water treatment water passing structure provided by the present application adopts the following technical scheme:

[0006] The water treatment water passing structure comprises a valve body and a movable valve disc rotatably and sealingly assembled in the valve body.

[0007] The valve body is provided with a water inlet and a water outlet, and has a valve outer cavity and a valve inner cavity coaxially and spaced supported in the valve outer cavity. The valve outer cavity is communicated with the water inlet, and the cavity wall of the valve inner cavity is provided with a first valve body water passing hole communicated with the valve outer cavity and a second valve body water passing hole communicated with the water outlet. The cavity wall of the valve inner cavity and the cavity wall of the valve outer cavity are provided with a first flow passage opening and a second flow passage opening spaced apart at the connecting part of the two.

[0008] The moving valve disc is located in the valve inner cavity and includes a large-diameter cylinder segment and a small-diameter cylinder segment coaxially and spaced supported in the large-diameter cylinder segment. The axial length of the large-diameter cylinder segment is greater than that of the small-diameter cylinder segment, and the top of the large-diameter cylinder segment is blocked. The annular water passing channel is formed between the large-diameter cylinder segment and the small-diameter cylinder segment. The cylinder wall of the large-diameter cylinder segment is provided with a first valve disc water passing hole, a second valve disc water passing hole and a water passing gap. The first valve disc water passing hole is located above the small-diameter cylinder segment, and the second valve disc water passing hole and the water passing gap are both communicated with the water passing channel.

[0009] The bottom of the valve body is provided with a first filter core interface for connecting with the treatment tank body. The first filter core interface is communicated with the water passing channel, and the inner cylinder is coaxially supported in the first filter core interface. The inner cylinder forms a second filter core interface for connecting with the central pipe in the treatment tank body, and the inner cylinder is vertically penetrated with the inner space of the moving valve disc.

[0010] The moving valve disc has a first position and a second position in its rotating stroke. When the moving valve disc is at the first position, the first valve disc water passing hole and the second valve body water passing hole are both communicated with the water outlet, the large-diameter cylinder segment blocks the first flow passage opening and the second flow passage opening, and the water inlet is communicated with the first valve body water passing hole and the water passing channel. When the moving valve disc is at the second position, the large-diameter cylinder segment blocks the first valve body water passing hole and the second valve body water passing hole, the first valve disc water passing hole is communicated with the first flow passage opening, and the second valve disc water passing hole is communicated with the second flow passage opening.

[0011] Further, the lower end surface of the small-diameter cylinder segment is flush with the lower end surface of the large-diameter cylinder segment.

[0012] Further, the top of the inner cylinder is provided with an annular valve disc, the valve disc is matched with the small-diameter cylinder segment, and the small-diameter cylinder segment and the valve disc are in rotating sealing cooperation.

[0013] Further, the inner cylinder wall of the large-diameter cylinder segment is formed with a support flange, the small-diameter cylinder segment is coaxially connected below the support flange, the shape of the water passing gap matches the outer shape of the large-diameter cylinder segment, and the water passing gap extends from the top end of the small-diameter cylinder segment to the bottom end of the small-diameter cylinder segment in the axial direction of the large-diameter cylinder segment.

[0014] Further, the valve disc reaches the second position when it is rotated 90 degrees counterclockwise or 270 degrees clockwise from the first position.

[0015] The water treatment structure of the present application has the following advantages:

[0016] 1. In the water treatment structure of the present application, the space between the second filter core interface and the small-diameter cylinder segment is not blocked by any object in the axial direction of the valve disc, so that the water entering the second filter core interface can completely enter the small-diameter cylinder segment of the valve disc, maximizing the effective use area of the second filter core interface. Compared with the existing water treatment control valve, the water treatment structure of the present application can maximize the water output per unit time under the same horizontal cross-sectional area of the second filter core interface, improving the water treatment efficiency.

[0017] 2. The water treatment structure of the present application can be applied to both water treatment filtration devices with a double-valve structure to achieve filtration function and water treatment softening devices with a double-valve structure to achieve soft water production function, and has good versatility. Whether applied in any water treatment device, it can improve the water treatment performance of the device.

[0018] 3. The water treatment structure of the present application can achieve relative plugging of the water outlet by rotating the valve disc, which can be applied in water filtration devices with a double-valve structure or water softening devices with a double-valve structure without the need for external valves at the water outlet, saving costs.

[0019] The technical scheme of the water treatment device of the present application is as follows:

[0020] The water treatment device comprises a water treatment water passing structure and a water treatment flow channel switching structure connected together, wherein the water treatment water passing structure comprises a valve body and a valve disc rotatingly and sealingly assembled in the valve body.

[0021] The valve body is provided with a water inlet and a water outlet, and has a valve outer cavity and a valve inner cavity coaxially and spacedly supported in the valve outer cavity. The valve outer cavity is communicated with the water inlet, and the cavity wall of the valve inner cavity is provided with a first valve body water passing hole communicated with the valve outer cavity and a second valve body water passing hole communicated with the water outlet. The cavity wall of the valve inner cavity and the cavity wall of the valve outer cavity are provided with a first flow channel opening and a second flow channel opening spaced apart at the connection part therebetween, and the cavity wall of the valve outer cavity is further provided with a water passing communication opening located above the valve inner cavity.

[0022] The movable valve disc is located in a valve inner cavity, comprising a large-diameter cylinder segment and a small-diameter cylinder segment coaxially supported in the large-diameter cylinder segment, the axial length of the large-diameter cylinder segment is greater than that of the small-diameter cylinder segment, and the top of the large-diameter cylinder segment is blocked; an annular water passage is formed between the large-diameter cylinder segment and the small-diameter cylinder segment, the cylinder wall of the large-diameter cylinder segment is provided with a first valve disc water passage hole, a second valve disc water passage hole and a water passage notch, the first valve disc water passage hole is located above the small-diameter cylinder segment, and the second valve disc water passage hole and the water passage notch are both communicated with the water passage;

[0023] The bottom of the valve body is provided with a first filter core interface for connecting with a treatment tank body, the first filter core interface is communicated with the water passage, and an inner cylinder is coaxially supported in the first filter core interface; the inner cylinder forms a second filter core interface for connecting with a central pipe in the treatment tank body, and the inner cylinder is vertically penetrated with the inner space of the movable valve disc;

[0024] The movable valve disc has a first position and a second position in its rotating stroke, when the movable valve disc is in the first position, the water treatment device is in a filtering or soft water making state, the first valve disc water passage hole and the second valve body water passage hole are both communicated with the water outlet, the large-diameter cylinder segment blocks the first flow channel opening and the second flow channel opening, and the water inlet is communicated with the first valve body water passage hole and the water passage; when the movable valve disc is in the second position, the large-diameter cylinder segment blocks the first valve body water passage hole and the second valve body water passage hole, the first valve disc water passage hole is communicated with the first flow channel opening, the second valve disc water passage hole is communicated with the second flow channel opening, raw water enters the valve outer cavity through the water inlet and enters the water treatment flow channel switching structure through the water passage communication opening, so as to switch between backwashing, forward washing or switching between backwashing, regeneration and forward washing.

[0025] Further, the lower end surface of the small-diameter cylinder segment is flush with the lower end surface of the large-diameter cylinder segment.

[0026] Further, the top of the inner cylinder is provided with an annular valve disc, the valve disc is matched with the small-diameter cylinder segment, and the small-diameter cylinder segment and the valve disc are in rotating sealing cooperation.

[0027] Further, a supporting flange is formed on the inner cylinder wall of the large-diameter cylinder segment, the small-diameter cylinder segment is coaxially connected below the supporting flange, the shape of the water passage notch is matched with the shape of the large-diameter cylinder segment, and the water passage notch extends from the top end of the small-diameter cylinder segment to the bottom end of the small-diameter cylinder segment in the axial direction of the large-diameter cylinder segment.

[0028] Further, the movable valve disc reaches the second position when it is rotated counterclockwise by 90 degrees or clockwise by 270 degrees from the first position.

[0029] The water treatment device has the following beneficial effects:

[0030] 1. During use, the water treatment device of the present invention maintains a clear space between the second filter interface and the small-diameter cylindrical section along the axis of the movable valve disc. Water entering the second filter interface from the central pipe can fully enter the small-diameter cylindrical section of the movable valve disc, maximizing the effective water flow area of ​​the second filter interface. Compared to existing water treatment control valves, the water treatment device of the present invention maximizes the water output per unit time for a given horizontal cross-sectional area of ​​the second filter interface, improving water treatment efficiency. Furthermore, while achieving the same effective water flow at the second filter interface, the water treatment device of the present invention can be made smaller.

[0031] 2. Under the action of the water treatment flow path switching structure, the water treatment device of the present invention can adopt different structures to realize the functions of the multifunctional filter valve or multifunctional softening valve in the prior art.

[0032] 3. When the water treatment device of the present invention switches between the normal working state and other states, the water outlet can be blocked by simply rotating the movable valve plate at a set angle, without the need for an external valve, thus saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood by reading the following detailed description with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present invention are shown in an illustrative and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0034] FIG1 is a perspective schematic diagram showing a water treatment water flow structure of the present invention;

[0035] FIG2 is a perspective schematic diagram of FIG1 without the driving device;

[0036] FIG3 is a top view of FIG2 ;

[0037] FIG4 is a cross-sectional view of FIG3 (the movable valve plate is in the first position);

[0038] FIG5 is a schematic diagram of the three-dimensional structure of the movable valve plate;

[0039] FIG6 is a second schematic diagram of the three-dimensional structure of the movable valve plate;

[0040] FIG7 is a cross-sectional view of the movable valve plate;

[0041] Figure 8 is a cross-sectional view of the valve body;

[0042] FIG9 is a cross-sectional view of FIG3 (the movable valve plate is in the second position).

[0043] Explanation of reference signs: 1, valve body; 2, moving valve plate; 201, large-diameter cylinder segment; 202, small-diameter cylinder segment; 203, notch; 204, first valve plate water passage hole; 205, second valve plate water passage hole; 206, water passage; 3, water inlet; 4, water outlet; 5, fixed valve plate; 6, valve inner cavity; 7, valve outer cavity; 8, first valve body water passage hole; 9, second valve body water passage hole; 10, first flow channel opening; 11, second flow channel opening; 12, water passage communication opening; 13, first filter element interface; 14, second filter element interface; 15, support portion; 16, support flange; 17, driving device; 18, water treatment flow channel switching structure; 19, sealing plate. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Those skilled in the art should know that the embodiments described below are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0045] After introducing the basic principles of the present application, various non-limiting embodiments of the present application will be specifically introduced below. Any number of elements in the drawings is used for illustration and not limitation, and any naming is only used for distinction and does not have any limiting meaning.

[0046] The principles and spirits of the present application will be explained in detail below with reference to several representative embodiments of the present application.

[0047] Embodiment 1 of the water treatment water passage structure provided by the present application:

[0048] As shown in FIGS. 1, 2 and 4, the water treatment water passage structure includes a valve body 1, a moving valve plate 2 rotatably sealed and assembled in the valve body 1, a fixed valve plate 5 fixed in the valve body 1, and a driving device 17 provided at the top of the valve body 1 for driving the moving valve plate 2 to rotate. Among them, the driving device 17 is prior art, mainly including a motor, a driving pinion, a driven gear and a rack rod, the driving pinion is fixed on the output shaft of the motor, the driven gear is fixed on the rack rod, and the rack rod is connected with the top of the moving valve plate 2.

[0049] As shown in Fig. 8, the valve body 1 is provided with a water inlet 3 and a water outlet 4, and the water inlet 3 and the water outlet 4 are located on the two radial sides of the valve body 1 respectively, and the position of the water inlet 3 is higher than that of the water outlet 4. The valve body 1 has a valve outer cavity 7, and the valve outer cavity 7 is communicated with the water inlet 3. A valve cylinder is coaxially and spaced supported in the valve outer cavity 7, and the space in the valve cylinder forms a valve inner cavity 6. The cavity wall of the valve inner cavity 6 is provided with a first valve body water passing hole 8 communicated with the valve outer cavity 7, and is also provided with a second valve body water passing hole 9 communicated with the water outlet 4. The cavity wall of the valve inner cavity 6 and the cavity wall of the valve outer cavity 7 are both provided with a first flow passage opening 10 and a second flow passage opening 11 spaced apart and penetrating at the connecting part of the two cavity walls, and the first flow passage opening 10 is located above the second flow passage opening 11, but is staggered arranged. The cavity wall of the valve outer cavity 7 is also provided with a water passing communication opening 12 located above the valve inner cavity 6, and the water passing communication opening 12 is used for being communicated with a water treatment flow passage switching structure 18 in a water treatment device.

[0050] As shown in Fig. 4 and Fig. 9, the valve disc 2 is located in the valve inner cavity 6, and as shown in Fig. 5, Fig. 6 and Fig. 7, the valve disc 2 includes a large-diameter cylinder segment 201 and a small-diameter cylinder segment 202, and the inner cylinder wall of the large-diameter cylinder segment 201 is integrally formed with a ring-shaped support flange 16, the outer diameter of the support flange 16 is equal to the inner diameter of the large-diameter cylinder segment 201, the small-diameter cylinder segment 202 is coaxially connected below the support flange 16, and the inner diameter of the small-diameter cylinder segment 202 is the same as that of the support flange 16. The axial length of the large-diameter cylinder segment 201 is greater than that of the small-diameter cylinder segment 202, as shown in Fig. 3, the top of the large-diameter cylinder segment 201 is sealed by a sealing plate 19, and the lower end surface of the small-diameter cylinder segment 202 is flush with the lower end surface of the large-diameter cylinder segment 201. An annular water passing channel 206 is formed between the large-diameter cylinder segment 201 and the small-diameter cylinder segment 202, and the cylinder wall of the large-diameter cylinder segment 201 is provided with a first valve disc water passing hole 204, a second valve disc water passing hole 205 and a water passing gap 203. The first valve disc water passing hole 204 and the second valve disc water passing hole 205 are both located on the same side of the large-diameter cylinder segment 201, the first valve disc water passing hole 204 is located above the small-diameter cylinder segment 202, and the second valve disc water passing hole 205 and the water passing gap 203 are both communicated with the water passing channel 206. The shape of the water passing gap 203 matches the shape of the large-diameter cylinder segment 201, and the water passing gap 203 extends from the top end of the small-diameter cylinder segment 202 to the bottom end of the small-diameter cylinder segment 202 in the axial direction of the large-diameter cylinder segment 201.

[0051] The bottom of the valve body 1 is provided with a first filter core interface 13 for connecting with a treatment tank body, and the first filter core interface 13 is communicated with a water passing channel 206. A support part 15 is integrally arranged in the first filter core interface 13 to coaxially support an inner cylinder, and the support part 15 is used for supporting the inner cylinder, which occupies a small part of the effective water passing area of the first filter core interface 13. The inner cylinder forms a second filter core interface 14 for connecting with a center pipe in the treatment tank body, and the water is directly passed between the inner cylinder and the center pipe. The valve plate 5 is annular, is fixed at the top of the inner cylinder, and mainly plays a lubricating role. The inner diameter of the valve plate 5 is equal to the inner diameters of the small-diameter cylinder segment 202 and the inner cylinder, and the outer diameter of the valve plate 5 is equal to the outer diameters of the small-diameter cylinder segment 202 and the inner cylinder. The valve plate 5 is in rotary sealing cooperation with the small-diameter cylinder segment 202 and the valve inner cavity 6, and the inner space of the inner cylinder is in through communication with the inner space of the valve plate 2. The water flowing into the valve plate 2 from the center pipe or flowing from the valve plate 2 to the center pipe is passed through the second filter core interface 14 in full area.

[0052] The water treatment water passing structure of the present application has two states in use, namely, the valve plate 2 has a first position and a second position in the rotary stroke. When the valve plate 2 is at the first position, as shown in FIG. 4, the first valve plate water passing hole 204 and the second valve body water passing hole 9 are communicated with the water outlet 4, the large-diameter cylinder segment 201 blocks the first flow channel port 10 and the second flow channel port 11, and the water inlet 3 is communicated with the first valve body water passing hole 8 and the water passing channel 206. At this time, the water treatment water passing structure is in a filtering or soft water making state. The raw water flows into the water passing channel 206 along the first valve body water passing hole 8 from the water inlet 3, and then flows into the treatment tank body from the first filter core interface 13. After being purified in the treatment tank body, the raw water flows out from the center pipe, and then flows into the small-diameter cylinder segment 202 and the large-diameter cylinder segment 201 in sequence along the second filter core interface 14, and finally flows out from the first valve plate water passing hole 204 and the second valve body water passing hole 9 to the water outlet 4.

[0053] When the valve plate 2 is counterclockwise rotated by 90° or clockwise rotated by 270°, the valve plate 2 is at the second position, as shown in FIG. 9. The large-diameter cylinder segment 201 blocks the first valve body water passing hole 8 and the second valve body water passing hole 9, the first valve plate water passing hole 204 is communicated with the first flow channel port 10, and the second valve plate water passing hole 205 is communicated with the second flow channel port 11. At this time, the raw water enters the valve outer cavity 7 from the water inlet 3, and then enters the corresponding water treatment flow channel switching structure 18 along the water passing communication port 12 to switch the flow channel, so as to realize backwashing, forward washing or backwashing, regeneration and forward washing.

[0054] It should be noted that the first valve plate water passing hole 204 and the second valve plate water passing hole 205 on the moving valve plate 2 correspond to the first flow channel opening 10 and the second flow channel opening 11 respectively, that is, after the moving valve plate 2 rotates by a set angle, the first valve plate water passing hole 204 and the first flow channel opening 10 are communicated, and the second valve plate water passing hole 205 and the second flow channel opening 11 are communicated. Therefore, the rotation angle of the moving valve plate 2 only needs to meet the above condition, and in actual use, the positions of the two valve plate water passing holes and the positions of the two flow channel openings are reasonably set, which is not limited to 90° and 270° of the present application.

[0055] The water treatment water passing structure of the present application has no structural obstruction in the flow path of the water flowing out of the center pipe or flowing into the center pipe, and can fully utilize the entire horizontal cross-sectional water passing area of the second filter core interface 14, so that the water passing amount is larger and the water treatment efficiency is higher in the same time.

[0056] Embodiment 2 of the water treatment water passing structure provided by the present application:

[0057] The difference between the embodiment 1 and the embodiment 2 is mainly that the lower end surface of the small-diameter cylinder segment is flush with the lower end surface of the large-diameter cylinder segment in the embodiment 1. In the present embodiment, the lower end surface of the small-diameter cylinder segment is higher than the lower end surface of the large-diameter cylinder segment, that is, the small-diameter cylinder segment is located in the large-diameter cylinder segment as a whole. Of course, in other embodiments, the lower end surface of the small-diameter cylinder segment can also be lower than the lower end surface of the large-diameter cylinder segment, that is, the lower end of the small-diameter cylinder segment extends out of the large-diameter cylinder segment.

[0058] Embodiment 3 of the water treatment water passing structure provided by the present application:

[0059] The difference between the embodiment 1 and the embodiment 3 is mainly that the water passing gap in the embodiment 1 extends from the top end of the small-diameter cylinder segment to the bottom end of the small-diameter cylinder segment. In the present embodiment, the water passing gap can also be in the form of a hole, as long as water can flow from the second valve body water passing hole into the first filter core interface.

[0060] Specific embodiment of the water treatment device of the present application:

[0061] As shown in FIG. 1, the water treatment device comprises a water treatment water passing structure and a water treatment flow channel switching structure 18 connected together. The water treatment water passing structure is the same as the water treatment water passing structure in each of the above embodiments, and will not be described in detail here.

[0062] The water treatment flow channel switching structure 18 can be reasonably designed according to the use, for example, when the water treatment device is applied in a filtering system, the water treatment flow channel switching structure is designed to be capable of switching between the backwashing and the forward washing; when the water treatment device is applied in a softening system, the water treatment flow channel switching structure is designed to be capable of switching between the backwashing, the regeneration and the forward washing. As long as the water treatment device adopting the water treatment flow channel switching structure of the present application is within the protection scope of the present application.

Claims

1. A water treatment water structure, characterized by, The valve body and the rotating sealing assembly of the valve disc in the valve body; The valve body is provided with a water inlet and a water outlet, and has a valve outer cavity and a valve inner cavity coaxially and spacedly supported in the valve outer cavity. The valve outer cavity is communicated with the water inlet, and the cavity wall of the valve inner cavity is provided with a first valve body water passage communicated with the valve outer cavity and a second valve body water passage communicated with the water outlet. The cavity wall of the valve inner cavity and the cavity wall of the valve outer cavity are provided with a first flow passage opening and a second flow passage opening spaced apart at the connecting part of the two. The cavity wall of the valve outer cavity is further provided with a water passage communication opening above the valve inner cavity for communication with a water treatment flow passage switching structure. The valve disc is located in the valve inner cavity and includes a large-diameter cylinder segment and a small-diameter cylinder segment coaxially and spacedly supported in the large-diameter cylinder segment. The axial length of the large-diameter cylinder segment is greater than that of the small-diameter cylinder segment, and the top of the large-diameter cylinder segment is blocked. The annular water passage is formed between the large-diameter cylinder segment and the small-diameter cylinder segment. The cylinder wall of the large-diameter cylinder segment is provided with a first valve disc water passage, a second valve disc water passage and a water passage gap. The first valve disc water passage is located above the small-diameter cylinder segment, and the second valve disc water passage and the water passage gap are both communicated with the water passage. The bottom of the valve body is provided with a first filter core interface for connecting with a treatment tank body. The first filter core interface is communicated with the water passage, and an inner cylinder is coaxially supported in the first filter core interface. The inner cylinder forms a second filter core interface for connecting with a central pipe in the treatment tank body, and the inner cylinder is vertically communicated with the inner space of the valve disc. The valve disc has a first position and a second position in its rotating stroke. When the valve disc is in the first position, the first valve disc water passage and the second valve body water passage are both communicated with the water outlet, the large-diameter cylinder segment blocks the first flow passage opening and the second flow passage opening, and the water inlet is communicated with the first valve body water passage and the water passage. When the valve disc is in the second position, the large-diameter cylinder segment blocks the first valve body water passage and the second valve body water passage, the first valve disc water passage is communicated with the first flow passage opening, and the second valve disc water passage is communicated with the second flow passage opening.

2. The water treatment structure of claim 1, wherein The lower end surface of the small-diameter cylinder segment is flush with the lower end surface of the large-diameter cylinder segment.

3. The water treatment structure of claim 2, wherein The top of the inner cylinder is provided with an annular valve disc positioning structure which is matched with the small-diameter cylinder segment. The small-diameter cylinder segment and the valve disc positioning structure are in rotating sealing cooperation.

4. The water treatment structure of claim 2, wherein The inner cylinder wall of the large-diameter cylinder segment is formed with a support flange. The small-diameter cylinder segment is coaxially connected below the support flange. The shape of the water passage gap matches the outer shape of the large-diameter cylinder segment. The water passage gap extends from the top end of the small-diameter cylinder segment to the bottom end of the small-diameter cylinder segment in the axial direction of the large-diameter cylinder segment.

5. The water treatment structure according to any one of claims 1 to 4, wherein The valve disc reaches the second position when it is rotated counterclockwise by 90° or clockwise by 270° from the first position.

6. Water treatment device, characterized in that The water treatment water passage structure and the water treatment flow passage switching structure are connected together. The water treatment water passage structure includes a valve body and a valve disc rotatingly and sealingly assembled in the valve body. The valve body is provided with a water inlet and a water outlet, and has a valve outer cavity and a valve inner cavity coaxially and spacedly supported in the valve outer cavity. The valve outer cavity is communicated with the water inlet, and the cavity wall of the valve inner cavity is provided with a first valve body water passage communicated with the valve outer cavity and a second valve body water passage communicated with the water outlet. The cavity wall of the valve inner cavity and the cavity wall of the valve outer cavity are provided with a first flow passage opening and a second flow passage opening spaced apart at the connecting part therebetween, and the cavity wall of the valve outer cavity is further provided with a water passage communication opening located above the valve inner cavity. The moving valve disc is located in the valve inner cavity and includes a large-diameter cylinder segment and a small-diameter cylinder segment coaxially and spacedly supported in the large-diameter cylinder segment. The axial length of the large-diameter cylinder segment is greater than that of the small-diameter cylinder segment, and the top of the large-diameter cylinder segment is blocked. The annular water passage is formed between the large-diameter cylinder segment and the small-diameter cylinder segment. The cylinder wall of the large-diameter cylinder segment is provided with a first valve disc water passage, a second valve disc water passage and a water passage gap. The first valve disc water passage is located above the small-diameter cylinder segment, and the second valve disc water passage and the water passage gap are both communicated with the water passage. The bottom of the valve body is provided with a first filter core interface for connecting with a treatment tank body. The first filter core interface is communicated with the water passage, and an inner cylinder is coaxially supported in the first filter core interface. The inner cylinder forms a second filter core interface for connecting with a central pipe in the treatment tank body, and the inner cylinder is vertically penetrated with the inner space of the moving valve disc. The moving valve disc has a first position and a second position in its rotating stroke. When the moving valve disc is at the first position, the water treatment device is in a filtering or soft water making state, and the first valve disc water passage and the second valve body water passage are both communicated with the water outlet, the large-diameter cylinder segment blocks the first flow passage opening and the second flow passage opening, and the water inlet is communicated with the first valve body water passage and the water passage. When the moving valve disc is at the second position, the large-diameter cylinder segment blocks the first valve body water passage and the second valve body water passage, the first valve disc water passage is communicated with the first flow passage opening, and the second valve disc water passage is communicated with the second flow passage opening. Raw water enters the valve outer cavity through the water inlet and enters the water treatment flow channel switching structure through the water passage communication opening to perform backwashing, forward washing or switching between backwashing, regeneration and forward washing processes.

7. The water treatment device of claim 6, wherein, The lower end surface of the small-diameter cylinder segment is flush with the lower end surface of the large-diameter cylinder segment.

8. The water treatment device of claim 7, wherein, The top of the inner cylinder is provided with an annular valve disc, which is matched with the small-diameter cylinder segment. The small-diameter cylinder segment and the valve disc are in rotating sealing cooperation.

9. The water treatment device of claim 7, wherein, The inner cylinder wall of the large-diameter cylinder segment is formed with a support flange. The small-diameter cylinder segment is coaxially connected below the support flange. The shape of the water passage gap matches the outer shape of the large-diameter cylinder segment. The water passage gap extends from the top end of the small-diameter cylinder segment to the bottom end of the small-diameter cylinder segment in the axial direction of the large-diameter cylinder segment.

10. The water treatment device according to any one of claims 6-9, characterized in that The moving valve disc reaches the second position when it is rotated counterclockwise by 90° or clockwise by 270° from the first position.

Images