Pre-filter based on piston type flow channel switching

Through the combination of piston-type flow channel switching and ultrasonic transducer, automatic backwashing and one-button core replacement of the pre-filter are realized, solving the problem of inconvenient filter cleaning in the existing technology and improving the versatility and ease of use of the equipment.

CN223381241UActive Publication Date: 2025-09-26TJN TECH (BEIJING) CO LTD
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Patent Information

Application Number
CN202422366348.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-09-27
Publication Date
2025-09-26
Estimated Expiration
2034-09-27

AI Technical Summary

Technical Problem

The existing pre-filter needs to disassemble the filter cartridge to clean the filter screen after long-term use, which is troublesome to operate and lacks automatic backwashing and leak shut-off functions.

Method used

A pre-filter based on piston-type flow channel switching was designed. The flow channel switching device and the segmented piston assembly were used to switch between different flow channels between the filter element and the connector. An ultrasonic transducer was used for automatic backwashing. Water leakage detection and motor drive were also used to realize one-button core replacement, automatic backwashing and leak shut-off functions.

Benefits of technology

It realizes convenient replacement of filter elements, automatic backwashing and leakage closure, improves the versatility and ease of use of the pre-filter, reduces maintenance difficulty and water quality assurance.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a prefilter based on piston type flow channel switching, which comprises a filter element, a joint and a flow channel switching device, the joint is positioned on the filter element and is provided with a water inlet channel and a water outlet channel, the flow channel switching device is arranged between the filter element and the joint, and the switching of different flow channels between the filter element and the joint is realized through the operation of the flow channel switching device. According to the prefilter disclosed by the utility model, the flow channel switching device is arranged between the filter element and the joint, and the flow channel switching assembly is formed by the grating assembly and the sectional piston assembly which are arranged in the cavity of the flow channel switching device, so that different flow channels between the sectional piston assembly and the grating assembly are realized; according to the pre-filter, the filter element is arranged on the flow channel switching device and corresponds to the flow channel on the flow channel switching device, so that the switching of the flow channel on the flow channel switching device is realized, four different functional states of water production, one-key core replacement, automatic backwashing and leakage closing of the pre-filter are formed, and the multifunctionality of the pre-filter is improved.
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Description

Technical Field

[0001] The utility model belongs to the field of pre-filters, and in particular relates to a pre-filter based on piston-type flow channel switching. Background Art

[0002] Before tap water passes through the water supply network and reaches the water terminal, it passes through many pipes. There are a lot of impurities such as mud, rust, and floating matter in the pipes. If they are not filtered, it will cause secondary pollution of the water.

[0003] As the first filter at the water terminal, the pre-filter can remove large particles such as sediment, rust, insect eggs, and bloodworms from tap water. Therefore, most water systems now use pre-filters to filter water at the source before it enters the water terminal. This not only effectively eliminates secondary pollution and reduces water pollution diseases, but also removes solid impurities, protects the water system safety, and reduces system maintenance costs.

[0004] A prefilter is the first coarse filter for household water, filtering out silt, rust, and large particles from tap water. Existing prefilters consist of a filter cartridge and a filter element mounted within the cartridge. The cartridge has a water inlet and outlet located on its upper portion, with the inlet connected to the outlet via the filter element. During operation, water to be filtered enters the cartridge through the inlet, flows through the filter element, and purified water is discharged through the outlet. After extended use, to ensure water quality, the filter cartridge must be disassembled and the filter screen removed for cleaning, which is very troublesome. Therefore, there is an urgent need for a prefilter that can achieve multiple functions. Utility Model Content

[0005] Purpose of the utility model: The technical problem to be solved by the utility model is to provide a pre-filter based on piston-type flow channel switching, so as to realize four different functional states of the pre-filter: water production, one-key core replacement, automatic backwashing and leakage shutdown.

[0006] Technical solution: The utility model is based on a piston-type flow channel switching pre-filter, which includes a filter element, a connector located above the filter element and provided with a water inlet channel and a water outlet channel, and a flow channel switching device provided between the filter element and the connector. The flow channel switching device is operated to realize the switching of different flow channels between the filter element and the connector.

[0007] The upper wall of the cavity of the flow channel switching device is provided with openings connected to the water inlet channel and the water outlet channel of the joint, and the lower wall of the cavity of the flow channel switching device is provided with openings connected to the water inlet channel and the water outlet channel of the filter element, and the cavity of the flow channel switching device is also provided with a sewage outlet;

[0008] A flow channel switching assembly is provided in the cavity of the flow channel switching device, which includes a grille assembly and a segmented piston assembly that is arranged in the grille assembly and moves in the grille assembly to realize the opening and closing of different flow channels between the filter element and the connector.

[0009] Furthermore, the flow channel switching device also includes a gear drive assembly that drives the segmented piston assembly to move. The gear drive assembly includes a drive motor with active teeth and driven teeth engaged with the active teeth. The drive motor is arranged on the flow channel switching device through a connecting plate.

[0010] Furthermore, the grille assembly of the pre-filter includes an internal water-passing bracket and a top cover, and a plurality of water-passing brackets respectively arranged between the internal water-passing bracket and the top cover.

[0011] Furthermore, the segmented piston assembly of the pre-filter includes a piston body provided with a plurality of bosses, and a spiral worm connected to the piston body at one end and to the gear drive assembly at the other end.

[0012] Furthermore, the helical worm of the segmented piston assembly of the pre-filter is rotatably sleeved on the driven teeth, and the driven teeth have threads matching the helical worm on the inner side, and the helical worm is driven to move linearly by the rotation of the driven teeth.

[0013] Furthermore, a shaft sleeve is provided on the spiral worm of the pre-filter, and the shaft sleeve is connected to the driven gear, and the shaft sleeve is fixedly sleeved on the spiral worm by a pin.

[0014] Furthermore, the connector of the pre-filter is connected to the flow channel switching device through a spiral connector, and the connector is rotatably arranged on the spiral connector through a connecting ring between the connector and the spiral connector to achieve 360° rotation of the connector. A groove that cooperates with the connecting ring is provided on the outer side wall of the connector to limit the up and down movement of the connector after installation.

[0015] Furthermore, an electronic flow meter is provided at the water outlet of the water outlet channel of the connector of the pre-filter.

[0016] Furthermore, the pre-filter also includes a matching water leakage detection probe and a control panel provided on the flow channel switching device for regulating the movement of the drive motor, and the water leakage detection probe is electrically connected to the control panel.

[0017] Furthermore, the filter element of the pre-filter and the flow channel switching device are movably connected via an annular clamp connector.

[0018] Furthermore, the pre-filter also includes an ultrasonic transducer arranged in the filter element to separate impurities in the filter element.

[0019] Beneficial effect: Compared with the prior art, the advantages of the present invention are: the pre-filter is provided with a flow channel switching device between the filter element and the joint, and the flow channel switching assembly is composed of a grid assembly and a segmented piston assembly arranged in the cavity of the flow channel switching device to realize different flow channels between the segmented piston assembly and the grid assembly, and then corresponds to the flow channel on the flow channel switching device to realize the switching of the flow channel on the flow channel switching device, forming four different functional states of the pre-filter: water production, one-button core replacement, automatic backwashing and leakage shutdown, thereby improving the versatility of the pre-filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the pre-filter of the utility model Figure 1 ;

[0021] Figure 2 This is a schematic diagram of the structure of the pre-filter of the utility model Figure 2 (equipped with ultrasonic transducer);

[0022] Figure 3 This is a cross-sectional view of the upper portion of the pre-filter of the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of the pre-filter of the utility model Figure 2 (The flow channel switching device is not provided with a cover);

[0024] Figure 5 This is a schematic diagram of the structure of the pre-filter of the utility model Figure 3 (Hide some components);

[0025] Figure 6 This is a structural diagram of the grille assembly of the utility model;

[0026] Figure 7 This is a schematic structural diagram of the segmented piston assembly of the utility model;

[0027] Figure 8 This is a schematic diagram of the water production state of the pre-filter of the utility model;

[0028] Figure 9 This is a schematic diagram of the one-button core replacement state of the pre-filter of the utility model;

[0029] Figure 10 This is a schematic diagram of the backwash state of the pre-filter of the utility model;

[0030] Figure 11 This is a schematic diagram of the pre-filter of the present invention in the closed state with leakage. DETAILED DESCRIPTION

[0031] The technical solution of the present utility model is further described in detail below with reference to the accompanying drawings.

[0032] like Figure 1 As shown, the pre-filter of the present invention includes a filter element, a flow channel switching device 5 connected to the filter element 1, and a connector 4 connected to the flow channel switching device 5. The filter element 1 and the flow channel switching device 5 are conveniently connected via an annular clamp connector 19, thereby enabling flexible replacement and removal of the filter element 1. That is, the overall structure of the pre-filter of the present invention is, from bottom to top, the filter element 1, the flow channel switching device 5, and the connector 4. The annular clamp connector 19 is a latch-type connection, that is, after the two semicircular clamps are aligned, they are positioned and connected by a connecting pin. This structure is well known in the art and will not be described in detail.

[0033] In order to further improve the backwashing function of the pre-filter of the present invention, an ultrasonic transducer can be provided in the filter element 1 of the pre-filter, and the ultrasonic transducer is electrically connected to the ultrasonic power supply, such as Figure 2 As shown in the figure, the ultrasonic transducer is set up to emit ultrasonic waves during the backwash process. The ultrasonic waves are transmitted in the water inside the filter element, causing the liquid molecules to produce cavitation effect. The impact force generated separates the impurities from the filter and discharges them.

[0034] Among them, Figure 1 and Figure 3 As shown, the connector 4 is provided with an inlet channel 2 and an outlet channel 3, respectively. The ends of the inlet channel 2 and the outlet channel 3 are connected to pipelines. The outlet of the outlet channel 3 is equipped with an electronic flow meter to automatically remind filter replacement. The connector 4 is screwed onto the top of the flow channel switching device 5 via a spiral connector 17. A connecting ring 18 is provided between the connector 4 and the spiral connector 17. A groove is provided on the side wall of the connector 4 to match the connecting ring 18. The arrangement of the connecting ring 18 and the groove enables a rotational connection between the connector 4 and the spiral connector 17, that is, the connector 4 can achieve 360-degree rotation within the spiral connector 17. The purpose of this arrangement is to adjust the position of the water inlet and outlet according to different installation scenarios, improving ease of use. On the other hand, the engagement of the groove and the connecting ring 18 allows the spiral connector 17 to counteract the connecting ring 18, thereby limiting the upward and downward movement of the installed connector 4.

[0035] The cavity of the flow channel switching device 5 is a hollow structure. Its interior, located at the junction of the connector 4 and the filter element 1, houses the flow channel switching assembly. The upper sidewall of the flow channel switching device 5 cavity, corresponding to the sidewall of the connector 4, has openings that connect to the water inlet channel 2 and water outlet channel 3 of the connector 4. The lower sidewall of the flow channel switching device 5 cavity, corresponding to the sidewall of the water inlet channel 2 and water outlet channel 3 of the filter element 4, also has openings that connect to each other.

[0036] like Figures 4 to 7 As shown, the flow channel switching assembly of the flow channel switching device includes a grille assembly, a segmented piston assembly, and a gear drive assembly. The segmented piston assembly is provided with a plurality of bosses, preferably three, and the grille assembly is provided with a plurality of water-passing brackets 10, preferably four. The segmented piston assembly moves within the grille assembly, and the plurality of bosses on the segmented piston assembly cooperates with the plurality of water-passing brackets 10 of the grille assembly. The movement of the segmented piston assembly within the grille assembly enables switching between different passages between the grille assembly and the segmented piston assembly, thereby achieving switching of different water channels on the flow channel switching device 5. The grille assembly includes an internal water-passing bracket 10, a water-passing bracket 12 connected to the internal water-passing bracket 10 in sequence, and a top cover 11 located at the other end of the water-passing bracket 12. In other words, the grille assembly includes the internal water-passing bracket 10 and the top cover 11, as well as a plurality of water-passing brackets 12 located between the internal water-passing bracket 10 and the top cover 11. The segmented piston assembly includes a piston body 13 provided with a plurality of bosses and a helical worm 14 (threads not shown) connected to the piston body 13.

[0037] The gear drive assembly of the present invention includes a drive motor 7, which is provided with a driving tooth 6 and a driven tooth 8 connected to a helical worm 14, wherein the driven tooth 8 meshes with the driving tooth 6. The helical worm 14 is rotationally connected to the driven tooth 8 via a sleeve 15, which is fixed to the helical worm 14 via a latch 16. The inner side of the driven tooth 6 is provided with a thread (not shown) that cooperates with the helical worm 14. In other words, the switching assembly of the present invention drives the driving tooth 6 to rotate via the drive motor 7, thereby driving the driven tooth 8 to rotate. The threaded connection between the driven tooth 8 and the helical worm 14 achieves linear motion of the helical worm 14, thereby enabling the piston body 13 with a boss of the segmented piston assembly to move within the grid assembly, thereby achieving different waterway access or closure.

[0038] Specifically, such as Figure 8 As shown, when the piston body 13 is driven by the driving motor 7, the water inlet channel 2 of the connector 4, the channel formed by the water-passing bracket 12 of the grille assembly and the piston body 13, and the water inlet channel 2 of the filter element 1 are connected; the water outlet channel 3 of the filter element 1, the channel formed by the internal water-passing bracket 10 of the grille assembly and the piston body 14, and the water outlet channel 3 of the connector 4 are connected, that is, a flow channel is formed in which the water inlet channel 2 of the connector 4 enters the water inlet channel 2 of the filter element 1 through the flow channel switching device 5, and then enters the water outlet channel 3 of the connector 4 through the flow channel switching device 5, thereby realizing the water production working state.

[0039] like Figure 9As shown, when the piston body 13 is driven by the driving motor 7, the water inlet channel 2 of the connector 4, the channel formed by the water-passing bracket 12 of the grille assembly and the piston body 13, and the water outlet channel 3 of the connector 4 are connected, the one-click core replacement of the pre-filter is realized. In this state, the filter element 1 can be replaced without affecting the downstream water use.

[0040] like Figure 10 As shown, when the piston body 13 is driven by the drive motor 7, the water inlet channel 2 of the connector 4, the channel formed by the water passage bracket 12 of the grille assembly and the piston body 13, the internal water passage bracket 10 of the grille assembly, and the water outlet channel 3 of the filter element 1 are connected. The water inlet channel 3 of the filter element 1, the channel formed by the water passage bracket 12 of the grille assembly and the piston body 13, and the sewage discharge channel corresponding to the sewage discharge port are all connected, thereby realizing the backwash function of the pre-filter. At the same time, based on this, the channel formed by the water passage 12 of the grille assembly and the piston body 13 is also connected to the water outlet channel 3 of the connector 4, and thus, when the backwash process is realized, it does not affect the downstream water use.

[0041] In addition to the above, the drive motor 7 of the pre-filter of the present invention can be installed on the flow channel switching device 5 through the connecting plate 9, and the connecting plate 9 can also be provided with a control panel 21, and the movement of the drive motor 7 can be controlled by the control panel 21 to achieve automation. The pre-filter can also be equipped with a water leakage detection probe, and form an electrical connection with the control panel 21, so that when a water leakage is detected, it is fed back to the control panel 21, and the drive motor 7 drives the piston body 13 to move, so that the water inlet flow channel is closed, that is, the leakage closing function is achieved. Figure 11 shown.

Claims

1. A pre-filter based on piston-type flow channel switching, characterized in that: The pre-filter comprises a filter element (1), a connector (4) located on the filter element (1) and provided with a water inlet channel (2) and a water outlet channel (3), and a flow channel switching device (5) provided between the filter element (1) and the connector (4), wherein the flow channel switching device (5) operates to switch between different flow channels between the filter element (1) and the connector (4); The upper wall of the cavity of the flow channel switching device (5) is provided with openings communicating with the water inlet channel (2) and the water outlet channel (3) of the joint (4), and the lower wall of the cavity of the flow channel switching device (5) is provided with openings communicating with the water inlet channel (2) and the water outlet channel (3) of the filter element (1). The cavity of the flow channel switching device (5) is also provided with a sewage outlet. A flow channel switching assembly is provided in the cavity of the flow channel switching device (5), and the flow channel switching assembly includes a grid assembly, a segmented piston assembly that is arranged in the grid assembly and moves in the grid assembly to realize the opening and closing of different flow channels between the filter element (1) and the connector (4).

2. The pre-filter based on piston-type flow channel switching according to claim 1, characterized in that: The flow channel switching device further comprises a gear drive assembly for driving the segmented piston assembly to move, the gear drive assembly comprising a drive motor (7) provided with driving teeth (6), and driven teeth (8) meshing with the driving teeth (6). The drive motor (7) is arranged on the flow channel switching device (5) via a connecting plate (9).

3. The pre-filter based on piston-type flow channel switching according to claim 1, characterized in that: The grille assembly comprises an internal water-passing bracket (10) and a top cover (11), and a plurality of water-passing brackets (12) respectively arranged between the internal water-passing bracket (10) and the top cover (11).

4. The pre-filter based on piston-type flow channel switching according to claim 2, characterized in that: The segmented piston assembly comprises a piston body (13) provided with a plurality of bosses, a helical worm (14) connected to the piston body (13) at one end and connected to the gear drive assembly at the other end.

5. The pre-filter based on piston-type flow channel switching according to claim 4, characterized in that: The helical worm (14) of the segmented piston assembly is rotatably sleeved on the driven tooth (8), and a thread matching the helical worm (14) is provided on the inner side of the driven tooth (8). The rotation of the driven tooth (8) drives the helical worm (14) to move linearly.

6. The pre-filter based on piston-type flow channel switching according to claim 5, characterized in that: The helical worm (14) is provided with a shaft sleeve (15), which is connected to the driven gear (8). The shaft sleeve (15) is fixedly sleeved on the helical worm (14) through a latch (16).

7. The pre-filter based on piston-type flow channel switching according to claim 1, characterized in that: The connector (4) is connected to the flow channel switching device (5) via a spiral connector (17), and the connector (4) is rotatably mounted on the spiral connector (17) via a connecting ring (18) between the connector (4) and the spiral connector (17), so as to achieve 360-degree rotation of the connector (4). A groove matching the connecting ring (18) is provided on the outer wall of the connector (4) to limit the upward and downward movement of the connector (4) after installation.

8. The pre-filter based on piston-type flow channel switching according to claim 1, characterized in that: An electronic flow meter is provided at the water outlet of the water outlet channel (3) of the joint (4).

9. The pre-filter based on piston-type flow channel switching according to claim 2, characterized in that: The pre-filter also includes a matching water leakage detection probe and a control panel (21) provided on the flow channel switching device (5) for regulating the movement of the drive motor (7), and the water leakage detection probe is electrically connected to the control panel (21).

10. The pre-filter based on piston-type flow channel switching according to claim 1, characterized in that: The filter element (1) and the flow channel switching device (5) are movably connected via an annular clamp connector (19).

11. The pre-filter based on piston-type flow channel switching according to claim 1, characterized in that: The pre-filter also includes an ultrasonic transducer arranged in the filter element (1) to separate impurities in the filter element (1).