A multi-stage continuous filtration device for drinking water

Abstract

This utility model discloses a multi-stage continuous filtration device for drinking water, including a connecting pipe with a threaded end on its outer side. A cover plate is threadedly connected to the outer side of the connecting pipe through the threaded end. A first filter assembly is disposed at the bottom of the cover plate and is fitted onto the top inner side of the connecting pipe. A fixing mechanism is disposed at the bottom outer side of the connecting pipe, and a lower housing is disposed at the bottom of the connecting pipe through the fixing mechanism. A multi-stage filtration device is disposed inside the lower housing, with the top outer side of the multi-stage filtration device in close contact with the bottom inner side of the connecting pipe. The top of the lower housing is in close contact with the bottom of the connecting pipe, and a water outlet pipe is disposed at the bottom of the lower housing. A water inlet pipe is disposed at the top right end of the connecting pipe. The first filter assembly serves as a pretreatment device, intercepting large particulate sediments in the raw water in advance, reducing maintenance frequency. The fixing mechanism enables quick assembly and disassembly of the lower housing and the connecting pipe.

Description

Technical Field

[0001] This utility model relates to the field of drinking water filtration technology, and more specifically, to a multi-stage continuous filtration device for drinking water. Background Technology

[0002] In the field of drinking water purification, multi-stage filtration devices, by progressively intercepting impurities, microorganisms, and pollutants in water, have become core equipment for ensuring water quality safety. They are widely used in household drinking water treatment, public water supply systems, and outdoor emergency water supply. Their principle is to utilize filter materials with different pore sizes (such as activated carbon, ultrafiltration membranes, and RO membranes) to create a gradient filtration effect, gradually reducing the concentration of pollutants in the water until it meets drinking water standards.

[0003] An existing multi-stage continuous filtration device for drinking water has been found to have the following issues during use: 1. Large-diameter sediments such as silt, rust, and suspended particulate matter in the raw water directly enter the multi-stage filtration device, affecting the filtration effect of the multi-stage filtration device and increasing maintenance costs due to frequent replacement of filter components.

[0004] 2. The existing disassembly and assembly process is cumbersome. Multi-stage filtration devices are often fixed with multiple sets of bolts. When it is necessary to clean the filter material or replace damaged parts, multiple connection points need to be disassembled. Especially in home or non-professional scenarios, the operation process relies on tools and the steps are complicated, resulting in low user enthusiasm for maintenance, and even affecting the filtration effect due to untimely maintenance. Utility Model Content

[0005] (a) Technical problems to be solved In view of the problems existing in the prior art, this utility model provides a multi-stage continuous filtration device for drinking water to solve the technical problems mentioned in the background art, such as the lack of an effective pretreatment and interception mechanism and the cumbersome disassembly and assembly process.

[0006] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: a multi-stage continuous filtration device for drinking water, comprising a connecting pipe, a threaded end on the outer side of the connecting pipe, a cover plate threadedly connected to the outer side of the connecting pipe through the threaded end, a first filter assembly at the bottom of the cover plate, the first filter assembly being fitted onto the top inner side of the connecting pipe, a fixing mechanism at the bottom outer side of the connecting pipe, a lower housing at the bottom of the connecting pipe through the fixing mechanism, a multi-stage filtration device at the inner side of the lower housing, the top outer side of the multi-stage filtration device being in close contact with the bottom inner side of the connecting pipe, the top of the lower housing being in close contact with the bottom of the connecting pipe, an outlet pipe at the bottom of the lower housing, and an inlet pipe at the top right end of the connecting pipe.

[0007] This invention is further configured such that the fixing mechanism includes four sets of positioning blocks, an annular block is provided at the bottom of the outer side of the connecting pipe, four sets of sliding components are provided at the bottom of each annular block, and a connecting plate is evenly slidably mounted on the bottom of the annular block through the four sets of sliding components. Four sets of mounting plates are evenly provided at the top of the outer side of the lower housing, and a slot is provided at one end of each of the four sets of mounting plates. A positioning block is provided in each of the four sets of mounting plate slots, and the other end of each of the four sets of positioning blocks is connected to one end of the connecting plate. The symmetrical distribution of the four sets of positioning blocks and the mounting plate slots ensures balanced force on the connection between the lower housing and the connecting pipe, improves the sealing performance of the device, and the precise fit between the positioning blocks and the slots eliminates the need for repeated position calibration during the installation of the lower housing, improving assembly efficiency, and is especially suitable for scenarios where filter materials are frequently replaced.

[0008] The present invention is further configured such that the sliding assembly includes four sets of connecting springs, four sets of sliding grooves are evenly arranged at the bottom of the annular block, and a sliding rod is provided in each of the four sets of annular block sliding grooves. A connecting block is slidably arranged on the outer side of each of the four sets of sliding rods. The top of each of the four sets of connecting blocks is slidably connected to the corresponding annular block sliding groove, and the bottom of each of the four sets of connecting blocks is connected to the top of a connecting plate. A connecting spring is fitted on one end of each of the four sets of sliding rods, and the two ends of each of the four sets of connecting springs are respectively connected to the connecting block and one end of the annular block sliding groove. The elastic force of the connecting springs ensures that the positioning block and the slot are always tightly engaged, avoiding loosening caused by water flow impact or vibration, improving the stability of the device. The sliding cooperation between the sliding rod and the connecting block provides guidance for the connecting plate, ensuring accurate movement trajectory of the positioning block, avoiding misalignment and wear between the slot and the positioning block, and extending the service life of the component.

[0009] The present invention is further configured such that the first filter assembly includes a filter plate, a connecting rod is rotatably provided at the bottom of the cover plate, a first annular plate is provided at the top inner side of the connecting rod, four sets of locking blocks are evenly arranged on the inner side of the first annular plate, a filter plate is provided at the bottom of the connecting rod, a second annular plate is provided on the outer side of the filter plate, and four sets of U-shaped slots are evenly arranged on the outer side of the second annular plate. One end of each of the four sets of locking blocks is respectively engaged with the corresponding U-shaped slot of the second annular plate, and the outer side of the second annular plate slides tightly against the inner side of the first annular plate. The rotating locking structure of the locking blocks and the U-shaped slots enables quick disassembly and assembly of the filter plate, facilitating regular cleaning or replacement of the filter plate and ensuring the pretreatment interception effect. The sliding tight-fitting design of the first annular plate and the second annular plate ensures the stable installation of the filter plate and avoids short-circuiting of water flow caused by gaps, ensuring that all raw water is filtered by the filter plate and improving the pretreatment efficiency.

[0010] The present invention is further configured such that an annular sealing ring is provided at the top of the connecting pipe, and the top of the annular sealing ring is in close contact with the bottom of the cover plate; the annular sealing ring effectively enhances the sealing performance between the cover plate and the connecting pipe, solves the problem of easy water leakage in traditional threaded connections, and its elastic deformation capability can adapt to the small gaps in threaded connections, reduce the assembly precision requirements, and improve the fault tolerance and reliability of the device.

[0011] The present invention is further configured such that each of the four sets of positioning blocks has an inclined surface on one side of its bottom; the inclined surface design makes it possible to engage the positioning blocks without manual operation when installing the lower housing, simply by raising the mounting plate, which makes the installation process smoother and improves the user experience.

[0012] The present invention is further configured such that a tapered guide pipe is provided at the bottom of the inner side of the connecting pipe, and the bottom of the outer side of the tapered guide pipe is fitted with the top of the inner side of the multi-stage filtration device; the tapered guide pipe gathers the water flow and accurately guides it into the multi-stage filtration device. The fitted design of the guide pipe and the multi-stage filtration device ensures that all the water flow enters the filtration channel, avoids unfiltered water from flowing directly into the outlet pipe, and ensures the thoroughness of the filtration effect.

[0013] (III) Beneficial Effects Compared with the prior art, this utility model provides a multi-stage continuous filtration device for drinking water, which has the following beneficial effects: 1. The first filter component, acting as a pretreatment device, intercepts large particulate sediments in the raw water in advance, solving the problem of easy clogging in existing multi-stage filtration devices. This extends the service life of the core filter material, reduces maintenance frequency, and the fixing mechanism replaces traditional bolt connections, enabling quick assembly and disassembly of the lower housing and connecting pipes. This solves the problem of complex disassembly in existing devices, making it particularly suitable for maintenance in home or non-professional settings. The tight fit between the connecting pipe and the lower housing, along with the continuous filtration design of the multi-stage filtration device, ensures a closed water flow path and a consistent filtration process, improving water purification efficiency and water quality stability.

[0014] 2. The symmetrical distribution of the four sets of positioning blocks and mounting plate slots ensures balanced force on the connection between the lower housing and the connecting pipe, improving the device's sealing performance. The precise fit between the positioning blocks and slots eliminates the need for repeated position calibration during lower housing installation, improving assembly efficiency. This is especially suitable for scenarios where filter materials are frequently replaced.

[0015] 3. The rotating clamping structure of the card block and U-shaped card slot enables quick disassembly and assembly of the filter plate, facilitating regular cleaning or replacement of the filter plate and ensuring the pretreatment interception effect. The sliding and tight-fitting design of the first and second annular plates ensures stable installation of the filter plate and avoids short-circuiting of water flow caused by gaps, ensuring that all raw water is filtered by the filter plate and improving pretreatment efficiency. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of a multi-stage continuous filtration device for drinking water according to the present invention; Figure 2 This is a three-dimensional structural diagram of a multi-stage continuous filtration device for drinking water in the separation state according to the present invention. Figure 3 This is a three-dimensional schematic diagram of the internal cross-sectional structure of a multi-stage continuous filtration device for drinking water according to the present invention. Figure 4 This is a three-dimensional structural diagram showing the connection relationship between the mounting plate, positioning block, slider, connecting plate, etc. of this utility model; Figure 5 This is a three-dimensional structural diagram showing the connection relationship between the cover plate, connecting rod, filter plate, and second annular plate of this utility model.

[0017] In the diagram: 1. Connecting pipe; 2. Cover plate; 3. Lower shell; 4. Multi-stage filtration device; 5. Outlet pipe; 6. Inlet pipe; 7. Positioning block; 8. Annular block; 9. Connecting plate; 10. Mounting plate; 11. Connecting spring; 12. Slide rod; 13. Connecting block; 14. Filter plate; 15. Connecting rod; 16. First annular plate; 17. Clamping block; 18. Second annular plate; 19. Annular sealing ring; 20. Inclined surface; 21. Conical guide pipe. Detailed Implementation

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0020] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0021] Please see Figure 1-5A multi-stage continuous filtration device for drinking water includes a connecting pipe 1, a threaded end on the outside of the connecting pipe 1, a cover plate 2 threadedly connected to the outside of the connecting pipe 1 through the threaded end, a first filter assembly at the bottom of the cover plate 2, and the first filter assembly fitted onto the top of the inside of the connecting pipe 1, a fixing mechanism at the bottom of the outside of the connecting pipe 1, a lower housing 3 at the bottom of the connecting pipe 1 through the fixing mechanism, a multi-stage filtration device 4 inside the lower housing 3, the top of the outside of the multi-stage filtration device 4 being in close contact with the bottom of the inside of the connecting pipe 1, the top of the lower housing 3 being in close contact with the bottom of the connecting pipe 1, an outlet pipe 5 at the bottom of the lower housing 3, and an inlet pipe 6 at the top of the right end of the connecting pipe 1.

[0022] In this embodiment, during filtration, raw water flows in from the inlet pipe 6 at the top right end of the connecting pipe 1, undergoes preliminary filtration through the first filter assembly at the top inner side of the connecting pipe 1 to intercept large particles of sediment in the water, and the filtered water enters the bottom inner side of the connecting pipe 1 for deep filtration through the multi-stage filter device 4 inside the lower housing 3 connected to the bottom of the connecting pipe 1 by the fixing mechanism, and is finally discharged through the outlet pipe 5 at the bottom of the lower housing 3; during installation, the cover plate 2 is tightened and fixed through the threaded end on the outside of the connecting pipe 1, and the first filter assembly is fitted into the top inner side of the connecting pipe 1; the lower housing 3 is fixed to the bottom of the connecting pipe 1 by the fixing mechanism, and its top is in close contact with the bottom of the connecting pipe 1; during disassembly, the first filter assembly can be removed by loosening the cover plate 2, and the lower housing 3 can be separated from the connecting pipe 1 by releasing the fixing mechanism, which facilitates the replacement or cleaning of the filter components.

[0023] More specifically, when the filter plate 14 needs to be disassembled, the operator rotates the cover plate 2 so that the cover plate 2 and the outer side of the connecting rod 15 are disengaged from the threaded connection. Then, the operator pulls the cover plate 2 so that the cover plate 2 drives the filter plate 14 to slide through the connecting rod 15, so that the locking block 17 is disengaged from the U-shaped groove, and the filter plate 14 can be removed.

[0024] Please see Figure 1 and Figure 4 As one embodiment of the fixing mechanism: the fixing mechanism includes four sets of positioning blocks 7, an annular block 8 is provided at the bottom of the outer side of the connecting pipe 1, and four sets of sliding components are provided at the bottom of the annular block 8. A connecting plate 9 is evenly slidably provided at the bottom of the annular block 8 through the four sets of sliding components. Four sets of mounting plates 10 are evenly provided at the top of the outer side of the lower housing 3. A slot is provided at one end of the outer side of each of the four sets of mounting plates 10. A positioning block 7 is provided in each of the slots of the four sets of mounting plates 10, and the other end of each of the four sets of positioning blocks 7 is connected to one end of the connecting plate 9.

[0025] Specifically, when fixing the lower housing 3, the sliding component at the bottom of the annular block 8 drives the connecting plate 9 to move inward, and the positioning block 7 at one end of the connecting plate 9 moves upward accordingly, aligning with and engaging with the slot of the mounting plate 10 on the outer top of the lower housing 3. Through the cooperation of the four sets of positioning blocks 7 and the slot, the lower housing 3 is fixed to the bottom of the connecting pipe 1.

[0026] Please refer to Figures 2-4 As a further embodiment of the fixing mechanism: the sliding assembly includes four sets of connecting springs 11, four sets of sliding grooves are evenly arranged at the bottom of the annular block 8, and each of the four sets of sliding grooves of the annular block 8 is provided with a sliding rod 12. Each of the four sets of sliding rods 12 is slidably provided with a connecting block 13 on its outer side. The top of each of the four sets of connecting blocks 13 is slidably connected to the corresponding sliding groove of the annular block 8, and the bottom of each of the four sets of connecting blocks 13 is connected to the top of a connecting plate 9. Each of the four sets of sliding rods 12 is fitted with a connecting spring 11 on its outer side, and the two ends of each of the four sets of connecting springs 11 are connected to the connecting block 13 and one end of the sliding groove of the annular block 8, respectively.

[0027] Specifically, when installing the lower housing 3, the mounting plate 10 pushes the bottom of the positioning block 7 upward, the positioning block 7 drives the connecting plate 9 to move outward, the connecting block 13 at the top of the connecting plate 9 slides along the slide rod 12 in the groove of the annular block 8, compressing the connecting spring 11 on the outside of the slide rod 12; when the positioning block 7 is aligned with the slot, the connecting spring 11 rebounds, pushing the connecting block 13 to slide inward along the slide rod 12, the connecting block 13 drives the connecting plate 9 and the positioning block 7 to reset, so that the positioning block 7 is inserted into the slot.

[0028] In summary, the overall equipment is in use (or running): During filtration, raw water flows in from the inlet pipe 6 at the top right end of the connecting pipe 1. The water flows through the filter plate 14. The second annular plate 18 on the outer side of the filter plate 14 fits against the first annular plate 16 on the inner side of the connecting rod 15, intercepting large particles of sediment in the water. The pretreated water flows through the conical guide pipe 21 at the bottom inner side of the connecting pipe 1 and enters the multi-stage filtration device 4 inside the lower shell 3 for deep filtration. Finally, it is discharged from the outlet pipe 5 at the bottom of the lower shell 3.

[0029] When cleaning is required, loosen the cover plate 2 at the outer threaded end of the connecting pipe 1. The annular sealing ring 19 at the bottom of the cover plate 2 will detach from the top of the connecting pipe 1 along with the cover plate 2. The cover plate 2 will drive the filter plate 14 to rise synchronously through the connecting rod 15 at the bottom until the U-shaped groove and the locking block 17 of the second annular plate 18 are disengaged. The filter plate 14 will be removed from the top of the inner side of the connecting pipe 1 together with the connecting rod 15, thus completing the disassembly.

[0030] When disassembling the multi-stage filter device 4, pull the connecting plate 9 at the bottom of the annular block 8 outward. The connecting block 13 at the top of the connecting plate 9 slides along the slide rod 12 in the slide groove of the annular block 8, compressing the connecting spring 11 on the outside of the slide rod 12. The positioning block 7 at one end of the connecting plate 9 disengages from the slot of the mounting plate 10 of the lower housing 3. At this time, the lower housing 3 can be removed from the bottom of the connecting pipe 1, and then the multi-stage filter device 4 inside the lower housing 3 can be removed to complete the disassembly.

[0031] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-stage continuous filtration device for drinking water, comprising a connecting pipe (1), characterized in that: The connecting pipe (1) has a threaded end on its outer side. A cover plate (2) is threadedly connected to the outer side of the connecting pipe (1) through the threaded end. A first filter assembly is provided at the bottom of the cover plate (2). The first filter assembly is fitted into the top of the inner side of the connecting pipe (1). A fixing mechanism is provided at the bottom of the outer side of the connecting pipe (1). A lower housing (3) is provided at the bottom of the connecting pipe (1) through the fixing mechanism. A multi-stage filter device (4) is provided inside the lower housing (3). The top of the multi-stage filter device (4) is in close contact with the bottom of the inner side of the connecting pipe (1). The top of the lower housing (3) is in close contact with the bottom of the connecting pipe (1). A water outlet pipe (5) is provided at the bottom of the lower housing (3). A water inlet pipe (6) is provided at the top of the right end of the connecting pipe (1).

2. The multi-stage continuous filtration device for drinking water according to claim 1, characterized in that: The fixing mechanism includes four sets of positioning blocks (7), an annular block (8) is provided at the bottom of the outer side of the connecting pipe (1), and four sets of sliding components are provided at the bottom of the annular block (8). A connecting plate (9) is evenly slidably provided at the bottom of the annular block (8) through the four sets of sliding components. Four sets of mounting plates (10) are evenly provided at the top of the outer side of the lower housing (3). A slot is provided at one end of the outer side of each of the four sets of mounting plates (10). A positioning block (7) is provided in the slot of each of the four sets of mounting plates (10), and the other end of each of the four sets of positioning blocks (7) is connected to one end of the connecting plate (9).

3. The multi-stage continuous filtration device for drinking water according to claim 2, characterized in that: The sliding assembly includes four sets of connecting springs (11), four sets of sliding grooves are evenly arranged at the bottom of the annular block (8), and sliding rods (12) are arranged in the sliding grooves of the four sets of annular blocks (8). Connecting blocks (13) are slidably arranged on the outer side of the four sets of sliding rods (12). The tops of the four sets of connecting blocks (13) are slidably connected to the corresponding sliding grooves of the annular block (8), and the bottoms of the four sets of connecting blocks (13) are connected to the tops of a set of connecting plates (9). Connecting springs (11) are fitted on one end of the outer side of the four sets of sliding rods (12), and the two ends of the four sets of connecting springs (11) are connected to the connecting blocks (13) and one end of the sliding grooves of the annular block (8) respectively.

4. The multi-stage continuous filtration device for drinking water according to claim 1, characterized in that: The first filter assembly includes a filter plate (14), a connecting rod (15) is rotatably provided at the bottom of the cover plate (2), a first annular plate (16) is provided at the top of the inner side of the connecting rod (15), four sets of locking blocks (17) are evenly provided on the inner side of the first annular plate (16), a filter plate (14) is provided at the bottom of the connecting rod (15), a second annular plate (18) is provided on the outer side of the filter plate (14), four sets of U-shaped slots are evenly provided on the outer side of the second annular plate (18), one end of the four sets of locking blocks (17) is respectively engaged with the corresponding U-shaped slot of the second annular plate (18), and the outer side of the second annular plate (18) slides tightly against the inner side of the first annular plate (16).

5. A multi-stage continuous filtration device for drinking water according to claim 1, characterized in that: The top of the connecting pipe (1) is provided with an annular sealing ring (19), and the top of the annular sealing ring (19) is in close contact with the bottom of the cover plate (2).

6. A multi-stage continuous filtration device for drinking water according to claim 2, characterized in that: The four sets of positioning blocks (7) each have a slope (20) on the opposite side of their bottom.

7. A multi-stage continuous filtration device for drinking water according to claim 1, characterized in that: A tapered guide tube (21) is provided at the bottom of the inner side of the connecting pipe (1), and the bottom of the tapered guide tube (21) is fitted with the top of the inner side of the multi-stage filtration device (4).

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