Modular multi-stage filtering device for direct drinking water from pipes

Abstract

This invention relates to the field of multi-stage filtration technology, specifically a modular multi-stage filtration device for piped drinking water. It includes a coarse filter, a water pipe, a fine filter, and a water pump. The coarse filter, fine filter, and water pump are connected by the water pipe. The fine filter includes a housing, an inlet, an outlet, a water impeller, an adjustment mechanism, a mounting bracket, and a circulation mechanism. The inlet is located on the bottom side of the housing, and the outlet is located at the center of the top of the housing. The water impeller is installed at the inlet, the adjustment mechanism is installed at the water impeller, and the mounting bracket is located below the water impeller. Granular activated carbon is placed inside the mounting bracket, and the circulation mechanism is installed at the mounting bracket. This device adaptively adjusts the amount of granular activated carbon inside according to the water flow rate while circulating the activated carbon, thereby ensuring the activity of the granular activated carbon and improving the filtration effect of drinking water over long periods.

Description

Technical Field

[0001] This invention relates to the field of multi-stage filtration technology, specifically a modular multi-stage filtration device for piped drinking water. Background Technology

[0002] Modular multi-stage filtration devices for piped drinking water are core water purification equipment specifically designed to treat tap water to meet direct drinking standards. Among existing water purification technologies, multi-stage filtration is a common and effective mainstream solution. It typically combines PP cotton filter cartridges for coarse filtration to remove large particles such as sediment and rust, activated carbon filter cartridges for adsorption to remove residual chlorine, odors, and organic matter, and finally, reverse osmosis membranes for fine filtration to obtain high-quality pure water.

[0003] In the aforementioned technical solutions, granular activated carbon is widely used as the core adsorption material due to its large specific surface area and excellent adsorption performance. However, existing filtration devices using granular activated carbon generally suffer from the following problems: First, the granular activated carbon filter bed in most filtration devices is fixed. In this case, regardless of whether the user uses a small flow of water for filling or a large flow for rinsing, the water flows through the fixed activated carbon layer along the same path. When the water flow is large, the water velocity is too fast, significantly shortening the contact time between the water and the activated carbon, resulting in insufficient adsorption and a significant decrease in purification efficiency, affecting the taste and safety of the output water. Conversely, if the filter layer is designed to be too dense to ensure purification effect under large water flow, unnecessary water flow resistance will be generated under small water flow, thus affecting the water flow rate. Second, the adsorption capacity of granular activated carbon is limited. After a period of use, the activated carbon will gradually lose its purification effect due to adsorption saturation, and may even become a breeding ground for bacteria due to the trapped organic matter, causing secondary pollution to the water quality.

[0004] To address the aforementioned issues, existing technologies offer several solutions. One common approach is to manually replace the entire activated carbon filter cartridge periodically. However, this method is not only cumbersome, but also makes it difficult to visually assess the activated carbon's condition since the filter cartridge is located inside the equipment. This can lead to oversights, resulting in the long-term use of an ineffective filter cartridge. Furthermore, too short a replacement cycle can result in the activated carbon not being fully utilized, leading to waste.

[0005] Based on this, in order to solve the problem of difficulty in balancing the full use of activated carbon and ensuring water purification efficiency in the process of piped drinking water filtration, this invention designs a modular multi-stage filtration device for piped drinking water. Summary of the Invention

[0006] This invention provides a modular multi-stage filtration device for piped drinking water, which solves the problem of balancing the full use of activated carbon and ensuring water purification efficiency during the filtration process. The device adaptively adjusts the amount of granular activated carbon inside according to the water flow rate, while circulating the activated carbon to ensure its activity, thereby improving the filtration effect of drinking water over a long period of time.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] This invention provides a modular multi-stage filtration device for piped drinking water, comprising a coarse filter, a water pipe, a fine filter, and a water pump. The coarse filter, fine filter, and water pump are connected by the water pipe. The fine filter includes a housing, an inlet, an outlet, a water wheel, an adjusting mechanism, a mounting frame, and a circulation mechanism. The inlet is located at the bottom side of the housing, and the outlet is located at the center of the top of the housing. The water wheel is installed at the inlet, the adjusting mechanism is installed at the water wheel, and the mounting frame is located below the water wheel. Granular activated carbon is placed inside the mounting frame. The circulation mechanism is installed at the mounting frame. When the water flow drives the water wheel to rotate, the adjusting mechanism changes the position of the mounting frame according to the water wheel speed. The circulation mechanism circulates the granular activated carbon inside the mounting frame after the mounting frame moves.

[0009] By setting up a coarse filter, a fine filter, and a water pump, a complete multi-stage pressurized filtration system is formed, achieving basic filtration capacity and water flow dynamics. The speed signal can be converted into the lateral displacement of the mounting frame through the adjustment mechanism. The displacement of the mounting frame not only causes the granular activated carbon to shake, thereby changing the contact area between the granular activated carbon and the water flow, but also agitates and circulates new granular activated carbon through the circulation mechanism, thereby achieving efficient use of activated carbon and simultaneously improving the purification effect of the water flow.

[0010] Preferably, the adjusting mechanism includes a connecting rod, a sliding groove, a slider, and a disc spring. The connecting rod is installed below the water wheel, the sliding groove is formed on the mounting frame, the slider is installed below the connecting rod and slides within the sliding groove, and the disc spring is installed between the slider and the mounting frame; a blocking block is installed on the mounting frame.

[0011] The chute wraps around the slider. When the water wheel rotates, it will drive the slider and then the mounting frame to rotate through the connecting rod. When the speed is high, the mounting frame will be thrown outward due to centrifugal force. At this time, the mounting frame will move laterally relative to the slider. The slider is fixedly connected to the connecting rod, and the connecting rod is fixedly connected to the water wheel.

[0012] When the water flow is large, the filtration volume is automatically increased to ensure the purification effect. When the water flow is small, the flow opening diameter is automatically reduced to reduce water resistance, while the flow rate is increased. This allows the filtration device to balance purification efficiency and water flow efficiency in different operating flow ranges.

[0013] Preferably, the circulation mechanism includes a centrifugal net, a return spring, a telescopic block, a replenishment groove, and a compression spring. The centrifugal net is installed in the mounting frame near the inner ring of the water turbine. The return spring is installed between the centrifugal net and the mounting frame. The telescopic block is installed below the mounting frame. The initial centrifugal net is located above the telescopic block. The replenishment groove is opened on the side of the telescopic block away from the inner ring of the water turbine. The compression spring is installed below the telescopic block.

[0014] As the mounting frame moves due to changes in water flow, the centrifugal mesh inside also rotates outwards due to centrifugal force, causing the bottom telescopic block to move upwards. This, in turn, is further lifted by the elastic force of the compression spring. At this time, the granular activated carbon inside the mounting frame is agitated and stirred. This extends the effective service life of the entire filtration device, avoiding the drawback of traditional filter cartridges requiring complete disposal, and improving the efficiency of activated carbon utilization.

[0015] Meanwhile, as the centrifugal mesh moves outward, the upward movement of the telescopic block expands the storage space of the granular activated carbon, thereby increasing the contact area between the granular activated carbon and the water flow, and thus improving the water purification effect.

[0016] Preferably, the water wheel is provided with a spiral channel, and the surface of the water wheel is provided with arc-shaped blades.

[0017] The spiral channel pre-imparts a stable rotational vector to the water flow before it contacts the blades, allowing the water to impact the blades. The curved blade design, compared to flat blades, can capture the kinetic energy of the water flow and reduce energy loss. After the water enters from the inlet, it further increases the rotational speed of the water turbine.

[0018] Preferably, the centrifugal mesh is provided with a squeezing part, and the telescopic block is provided with a wedge-shaped part facing the centrifugal mesh.

[0019] By sliding the wedge-shaped surface, the longitudinal movement of the telescopic block is converted into the lateral movement of the centrifugal mesh, thereby agitating the granular activated carbon. This ensures that even if slight clumping occurs, the activated carbon can be separated and circulated through the shaking action, improving its activity and water purification efficiency. The centrifugal mesh is moved by the centrifugal force generated by the rotation of the mounting frame. Both the centrifugal mesh and the telescopic block have a mesh structure on all sides and are semi-enclosed. However, when they are on the same plane, the two openings correspond exactly. The connection between the centrifugal mesh and the mounting frame is a smooth surface, allowing the centrifugal mesh to slide relative to the mounting frame.

[0020] Preferably, a composite filter element is installed at the center of the water turbine, and the composite filter element is provided with sintered activated carbon, reverse osmosis membrane and post-activated carbon from bottom to top.

[0021] By combining dynamically adjusted pre-filtration with high-precision deep filtration in one module, the water quality meets direct drinking standards, thereby improving the final water quality.

[0022] Preferably, a replacement mechanism is provided below the housing. The replacement mechanism includes a mounting groove, a pressing block, a sliding plate, and a pressing spring. The mounting groove is formed on the side wall of the housing. The pressing block is located in the mounting groove. The sliding plate is installed in the telescopic block. The pressing spring is located between the sliding plate and the pressing block.

[0023] When replacement is needed, the user manually operates the squeezing block located outside the housing. The squeezing block drives the squeezing spring and the sliding plate to move outward, thereby replacing the granular activated carbon between the sliding plate and the telescopic block. This allows the user to replace the depleted granular activated carbon without disassembling the entire fine filter, improving efficiency.

[0024] Preferably, the blade surface is provided with grooves, and the path of the grooves is downward along the curvature of the blade; thus, when the water flow is low, it can flow directly downward through the grooves, reducing water flow resistance and increasing the water flow rate at this time.

[0025] The beneficial effects of this invention are as follows:

[0026] 1. This invention proposes a modular multi-stage filtration device for direct drinking water in pipelines. When the water turbine reaches the speed required to drive the regulating mechanism, the regulating mechanism converts the speed signal into a lateral displacement of the mounting frame. This displacement of the mounting frame not only causes the granular activated carbon to vibrate, thus changing the contact area between the granular activated carbon and the water flow, but also, through a circulation mechanism, agitates and replenishes the granular activated carbon, thereby achieving efficient use of the activated carbon and simultaneously improving the water purification effect.

[0027] 2. This invention proposes a modular multi-stage filtration device for direct drinking water in pipelines. When the water flow rate increases, the water wheel speed increases, simultaneously driving the connected mounting frame to rotate at high speed. This high-speed rotation causes the mounting frame, acting as a centrifugal mass, to be subjected to centrifugal force. This force drives the mounting frame to overcome initial resistance and slide along the slider towards the outer diameter via a groove. The lateral movement of the mounting frame causes the fixed blocking block to move away accordingly, thereby increasing the downward flow diameter of the water through the water wheel. Simultaneously, more granular activated carbon is positioned below the downward flow diameter of the water wheel, further increasing the contact area and contact time between the water flow and the activated carbon.

[0028] 3. The modular multi-stage filtration device for direct drinking water proposed in this invention, when the mounting frame moves due to changes in water flow, the centrifugal mesh inside will also move outwards due to the centrifugal force of rotation, thereby causing the bottom telescopic block to move upwards. Then, the bottom telescopic block will be further raised by the elastic force of the compression spring. The movement of the telescopic block will push the spare activated carbon in its replenishment tank into the filtration zone, replacing some of the activated carbon that has become saturated, thereby extending the effective service life of the entire filtration device, avoiding the drawback of the traditional filter cartridge being scrapped at once, and improving the utilization efficiency of activated carbon. Attached Figure Description

[0029] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are one embodiment of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 This is a schematic diagram of the fine filter of the present invention;

[0032] Figure 3 This is a schematic diagram of the internal structure of the fine filter of the present invention;

[0033] Figure 4 This is a schematic diagram of the adjusting mechanism of the present invention;

[0034] Figure 5 yes Figure 4 Enlarged view of point A in the middle;

[0035] Figure 6 yes Figure 4 Enlarged view of point B in the middle;

[0036] Figure 7 This is a schematic diagram of the composite filter element of the present invention;

[0037] Figure 8 yes Figure 7 Enlarged view of point C in the middle;

[0038] Figure 9 yes Figure 7 Enlarged view of point D in the middle.

[0039] In the diagram: 1. Coarse filter; 2. Water pipe; 3. Fine filter; 31. Housing; 32. Inlet; 33. Outlet; 34. Water wheel; 341. Blade; 3411. Groove; 35. Adjustment mechanism; 351. Connecting rod; 352. Slide groove; 353. Sliding block; 354. Blocking block; 355. Disc spring; 36. Mounting bracket; 37. Circulation mechanism; 371. Centrifugal screen; 3711. Squeezing section; 372. Return spring; 373. Telescopic block; 3731. Wedge-shaped section; 374. Replenishment groove; 375. Compression spring; 4. Water pump; 5. Spiral channel; 6. Composite filter element; 61. Sintered activated carbon; 62. Reverse osmosis membrane; 63. Post-activated carbon; 7. Replacement mechanism; 71. Mounting groove; 72. Squeezing block; 73. Slide plate; 74. Compression spring. Detailed Implementation

[0040] To better understand the above solution, the technical solution will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] like Figure 1-3 As shown, the present invention provides a modular multi-stage filtration device for piped drinking water, including a coarse filter 1, a water pipe 2, a fine filter 3, and a water pump 4. The coarse filter 1, the fine filter 3, and the water pump 4 are connected by the water pipe 2. The fine filter 3 includes a housing 31, an inlet 32, an outlet 33, a water wheel 34, an adjusting mechanism 35, a mounting frame 36, and a circulation mechanism 37. The inlet 32 ​​is located on the bottom side of the housing 31, and the outlet 33 is located at the center of the top of the housing 31. The water wheel 34 is installed at the inlet 32, the adjusting mechanism 35 is installed at the water wheel 34, and the mounting frame 36 is located below the water wheel 34. Granular activated carbon is placed inside the mounting frame 36. The circulation mechanism 37 is installed at the mounting frame 36. When the water flow drives the water wheel 34 to rotate, the adjusting mechanism 35 changes the position of the mounting frame 36 according to the rotation speed of the water wheel 34. The circulation mechanism 37 circulates the granular activated carbon inside the mounting frame 36 after the mounting frame 36 moves.

[0042] By setting up a coarse filter 1, a fine filter 3, and a water pump 4, a complete multi-stage pressurized filtration system is formed, realizing basic filtration capacity and water flow dynamics. The inlet 32 ​​is set at the bottom side and the outlet 33 is set at the top center, thereby guiding the water flow along the water pipe 2. At the same time, the water flows upward, which can realize the control of the water flow and prevent the water from continuing to flow due to gravity when the water supply is stopped. By using the upward water flow, when the water flow stops, the water flow above flows back downward to achieve backwashing, thereby cleaning the fine filter 3 in reverse and improving the filtration effect.

[0043] The rotational speed of the water turbine 34 directly and accurately reflects the influent flow rate, thereby adjusting the amount of granular activated carbon via the regulating mechanism 35. Water pressurized by the water pump 4, after initial purification by the coarse filter 1, enters tangentially from the inlet 32 ​​of the fine filter 3, driving the water turbine 34 to rotate using high-speed water flow. The rotation of the water turbine 34 synchronously drives the mounting frame 36 at its bottom to rotate. The rotational speed of the water turbine 34 is controlled by the amount of water entering per unit time. Therefore, when the water flow is sufficient (i.e., the water flow rate is high per unit time), the rotational speed of the water turbine 34 increases, consequently increasing the rotational speed of the mounting frame 36. Under centrifugal force, the mounting frame 36 tends to swing outwards. When the rotational speed of the water turbine 34 reaches the speed required to drive the regulating mechanism 35, the regulating mechanism 35 converts the rotational speed signal into a lateral displacement of the mounting frame 36. The displacement of the mounting bracket 36 not only causes the granular activated carbon to shake, thus changing the contact area between the granular activated carbon and the water flow, but also, through the circulation mechanism 37, agitates and circulates new granular activated carbon, thereby achieving efficient use of activated carbon and simultaneously improving the purification effect of the water flow.

[0044] like Figure 3-6 As shown, the adjustment mechanism 35 includes a connecting rod 351, a sliding groove 352, a slider 353, and a disc spring 355. The connecting rod 351 is installed below the water wheel 34. The sliding groove 352 is formed on the mounting frame 36. The slider 353 is installed below the connecting rod 351 and slides within the sliding groove 352. The disc spring 355 is installed between the slider 353 and the mounting frame 36. A blocking block 354 is installed on the mounting frame 36.

[0045] As the water flow increases, the water impeller 34 rotates faster, simultaneously driving the connected mounting frame 36 to rotate at high speed. This high-speed rotation causes the mounting frame 36 to act as a centrifugal mass, subjected to centrifugal force. This force drives the mounting frame 36 to overcome initial resistance and slide along the slider 353 outwards through the groove 352. The lateral movement of the mounting frame 36 causes the fixed blocking block 354 to move away accordingly, thereby increasing the downward flow diameter of the water through the water impeller 34. Simultaneously, more granular activated carbon is positioned below the downward flow diameter of the water impeller 34, further increasing the contact area and contact time between the water and the activated carbon.

[0046] Conversely, when the water flow decreases, the rotational speed of the water wheel 34 and the mounting bracket 36 decreases, and the centrifugal force decreases accordingly. Under the action of the disc spring 355, the mounting bracket 36 resets inward, driving the blocking block 354 back to its initial position. The blocking block 354 then blocks part of the water flow cross section, thereby accelerating the flow of water at that point. This achieves automatic increase of filtration volume to ensure purification effect during high water flow and automatic reduction of flow diameter to reduce water resistance during low water flow, while increasing flow speed. This allows the filtration device to balance purification efficiency and water flow efficiency within different operating flow ranges.

[0047] The disc spring 355 here can achieve segmented restriction of the mounting bracket 36. When the disc spring 355 is initially compressed, its resistance is small, so the mounting bracket 36 can be moved easily. As the resistance of the disc spring 355 gradually increases, it can prevent the mounting bracket 36 from being subjected to excessive centrifugal force and thus avoid rigid collision or detachment, thereby improving the overall stability.

[0048] like Figure 3-9 As shown, the circulation mechanism 37 includes a centrifugal net 371, a return spring 372, a telescopic block 373, a replenishment groove 374, and a compression spring 375. The centrifugal net 371 is installed inside the mounting frame 36 near the inner ring of the water wheel 34. The return spring 372 is installed between the centrifugal net 371 and the mounting frame 36. The telescopic block 373 is installed below the mounting frame 36. Initially, the centrifugal net 371 is located above the telescopic block 373. The replenishment groove 374 is opened on the side of the telescopic block 373 away from the inner ring of the water wheel 34. The compression spring 375 is installed below the telescopic block 373.

[0049] The centrifugal mesh 371 utilizes the centrifugal force generated by the rotation of the water wheel 34 to initially stratify and agitate the granular activated carbon. The telescopic block 373 and its internal replenishment tank 374 constitute the activated carbon storage and replenishment unit. When the mounting frame 36 moves due to changes in water flow, on the one hand, the centrifugal mesh 371 inside it also centrifuges outward with the centrifugal force of rotation, causing the telescopic block 373 at the bottom to move upward. Furthermore, the telescopic block 373 at the bottom is further raised by the elastic force of the compression spring 375. On the other hand, the mounting frame 36 has an inclined block at the bottom. After the mounting frame 36 rotates under centrifugal force, it moves outward and comes into contact with the inclined block. The inclined block further drives the telescopic block 373 to move upward, thereby pushing the centrifugal mesh 371 through the wedge-shaped surface, further realizing the movement of the granular activated carbon within the centrifugal mesh 371. At this time, the granular activated carbon within the mounting frame 36 is turned over and agitated. Meanwhile, the movement of the telescopic block 373 will push the spare activated carbon in its replenishment tank 374 into the filtration zone, replacing some of the activated carbon that has become saturated, thereby extending the effective service life of the entire filtration device, avoiding the drawback of traditional filter cartridges being scrapped at once, and improving the efficiency of activated carbon utilization.

[0050] The telescopic block 373 has a cover at its bottom. This cover can block the mounting groove 71 when the telescopic block 373 moves upward, preventing the granular activated carbon from clogging the bottom of the telescopic block 373. Both the centrifugal mesh 371 and the mounting frame 36 are mesh structures, so that the internal granular activated carbon can purify the water. The opening of the centrifugal mesh 371 is initially blocked by the mounting frame 36. When the centrifugal mesh 371 moves outward relative to the centrifugal force, the telescopic block 373 is reset by the bottom compression spring 375. Thus, the replenishment groove 374 of the telescopic block 373 is aligned with the opening of the centrifugal mesh 371, thereby forming the circulation and interaction of granular activated carbon under the action of centrifugal vibration.

[0051] The telescopic block 373 is located in the annular groove opened in the housing 31. A movable block is installed below the compression spring 375. The movable block slides in the mounting groove 71 and can rotate with the compression spring 375 and the telescopic block 373 above, but will not move up and down.

[0052] The water wheel 34 is provided with a spiral channel 5, and the surface of the water wheel 34 is provided with arc blades 341.

[0053] Before the water flow contacts the blades 341, the spiral channel 5 pre-imparts a stable rotational vector to the water flow, enabling the water flow to impact the blades 341. The design of the curved blades 341, compared to the flat blades 341, can capture the kinetic energy of the water flow and reduce energy loss. After entering from the inlet 32, the water flow first flows through the spiral channel 5 and is guided to form a strong spiral water flow. This rotating water flow then impacts the curved blades 341 of the water turbine 34. The curved force-bearing surface converts the impact kinetic energy of the water flow into torque that drives the water turbine 34 to rotate, thereby increasing the rotational speed of the water turbine 34.

[0054] The centrifugal net 371 is provided with a squeezing part 3711, and the telescopic block 373 is provided with a wedge-shaped part 3731 facing the centrifugal net 371.

[0055] When the telescopic block 373 moves relative to the centrifugal net 371, its wedge-shaped part 3731 pushes the squeezing part 3711 on the centrifugal net 371 through the wedge-shaped engagement; through the sliding of the wedge-shaped part 3731, the longitudinal movement of the telescopic block 373 is converted into the lateral movement of the centrifugal net 371, thereby generating a stirring effect on the granular activated carbon, thus ensuring that even if the activated carbon has slight agglomeration, it can be separated and circulated under the shaking action, thereby improving the activity of the activated carbon and the water purification efficiency.

[0056] A composite filter element 6 is installed at the center of the water turbine 34. The composite filter element 6 is provided with sintered activated carbon 61, reverse osmosis membrane 62 and post-activated carbon 63 from bottom to top.

[0057] The composite filter element 6 is placed at the center of the water wheel 34, where the water flow converges. The water, initially filtered by the granular activated carbon, flows upwards and converges at the center, then passes through each layer of the composite filter element 6 in sequence. Sintered activated carbon 61 performs secondary adsorption and protects the reverse osmosis membrane 62, which removes tiny impurities such as ions, bacteria, and viruses from the water. Finally, the post-activated carbon 63 further improves the taste. By combining dynamically adjusted pre-filtration with high-precision deep filtration in one module, the water quality meets direct drinking standards, thereby improving the final water quality.

[0058] Both the reverse osmosis membrane 62 and the post-activated carbon 63 are provided with shells 31 on their outer periphery, which prevent water from passing through, so that water can flow upward from the sintered activated carbon 61.

[0059] The housing 31 is provided with a replacement mechanism 7 below. The replacement mechanism 7 includes a mounting groove 71, a pressing block 72, a sliding plate 73 and a pressing spring 74. The mounting groove 71 is opened on the side wall of the housing 31. The pressing block 72 is located in the mounting groove 71. The sliding plate 73 is installed in the telescopic block 373. The pressing spring 74 is located between the sliding plate 73 and the pressing block 72.

[0060] During normal operation, the slide plate 73, under the action of the compression spring 74, seals the open side of the telescopic block 373. When replacement is needed, the user manually operates the compression block 72 located outside the housing 31. The compression block 72 drives the compression spring 74 and the slide plate 73 to move outward, thereby allowing the granular activated carbon between the slide plate 73 and the telescopic block 373 to be replaced. This allows the user to replace the depleted granular activated carbon without disassembling the entire fine filter 3, improving the efficiency of use.

[0061] The blade 341 has a groove 3411 on its surface, and the path of the groove 3411 is downward along the arc of the blade 341.

[0062] When water flows onto the surface of the curved blade 341, the groove 3411 can regulate and guide the water flow adhering to the surface of the blade 341, causing it to flow along a specific path. This reduces turbulence and slippage of the water flow on the surface of the blade 341, allowing the kinetic energy of the water flow to be more concentrated in driving the blade 341 to rotate. When the water flow is small, the power of the water flow is insufficient to make the water wheel 34 rotate. At this time, the water flow can flow downward along the groove 3411. Thus, when the water flow is small, it can flow directly downward through the groove 3411, reducing water flow resistance and increasing the water flow rate.

[0063] like Figure 1-9As shown, when a user draws a large amount of water, the water flow rate entering the device per unit time increases. The high-speed water flow enters tangentially from the bottom inlet 32, first flowing through the spiral channel 5 to form a strong spiral water flow, which efficiently impacts the arc-shaped blades 341 of the water wheel 34, thereby driving the water wheel 34 to rotate at high speed. At this time, the water wheel 34 drives the mounting frame 36 below it to rotate synchronously at high speed through the connecting rod 351 and the slider 353. The high-speed rotating mounting frame 36 generates centrifugal force. This centrifugal force acts on the mounting frame 36, driving the mounting frame 36 to overcome the preload of the disc spring 355 and slide relative to the slider 353 in the outer diameter direction along the sliding groove 352 opened on the mounting frame 36. On the one hand, the blocking block 354 on the mounting frame 36 will move away with the lateral displacement of the mounting frame 36, which allows the water flow to pass radially downward from a larger flow port and come into contact with a wider range of granular activated carbon, thereby increasing the contact area and contact time between the water flow and the activated carbon, ensuring that the water flow can still be fully purified under high flow rate. On the other hand, the lateral displacement of the mounting frame 36 will cause the inclined block at its bottom to interact with the telescopic block 373 of the circulation mechanism 37, or the centrifugal force of rotation will directly act on the centrifugal net 371, jointly driving the telescopic block 373 to move upward with the assistance of the compression spring 375. Next, the telescopic block 373 pushes the squeezing part 3711 on the centrifugal net 371 through its wedge-shaped part 3731. This action forces the centrifugal net 371 to agitate and squeeze the granular activated carbon in the mounting frame 36. At the same time, the movement of the telescopic block 373 will send the spare fresh activated carbon in its internal replenishment tank 374 into the filtration zone, completing the automatic circulation and replacement of some of the activated carbon that is about to be saturated. After deep purification through the composite filter element 6, it flows out from the top outlet 33.

[0064] When a user draws a small amount of water, the water flow rate entering the device per unit time decreases, and the kinetic energy of the water flow weakens accordingly, thus reducing the rotational speed of the water turbine 34 and the mounting bracket 36. This reduced rotational speed also decreases the centrifugal force acting on the mounting bracket 36. When the centrifugal force is insufficient to overcome the restoring force of the disc spring 355, the disc spring 355 pushes the mounting bracket 36 to its inward reset position. The reset of the mounting bracket 36 then causes the blocking block 354 on it to return to its initial position, re-blocking part of the water flow path. This action forces the limited water flow to pass only through a smaller diameter opening, thereby increasing the flow velocity at that point and ensuring that the water can effectively penetrate the activated carbon layer. The water then flows directly downwards along the groove 3411 on the surface of the blades 341 of the water turbine 34, forming a low-resistance bypass path, ensuring smooth water output under any water demand.

[0065] The foregoing has shown and described the basic principles and beneficial effects of the present invention. However, the present invention is not limited to the above embodiments. Various changes and modifications can be made to the present invention without departing from its effects and scope. All such changes and modifications fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A modular multi-stage filtration device for piped drinking water, characterized in that: The system includes a coarse filter (1), a water pipe (2), a fine filter (3), and a water pump (4). The coarse filter (1), the fine filter (3), and the water pump (4) are connected by the water pipe (2). The fine filter (3) includes a housing (31), an inlet (32), an outlet (33), a water wheel (34), an adjusting mechanism (35), a mounting bracket (36), and a circulation mechanism (37). The inlet (32) is located on the bottom side of the housing (31), and the outlet (33) is located at the center of the top of the housing (31). The wheel (34) is installed at the inlet (32), the adjusting mechanism (35) is installed at the wheel (34), the mounting frame (36) is located below the wheel (34), granular activated carbon is placed inside the mounting frame (36), and the circulation mechanism (37) is installed at the mounting frame (36). When the water flow drives the wheel (34) to rotate, the adjusting mechanism (35) changes the position of the mounting frame (36) according to the rotation speed of the wheel (34). The circulation mechanism (37) circulates the granular activated carbon inside the mounting frame (36) after the mounting frame (36) moves. The adjustment mechanism (35) includes a connecting rod (351), a slide groove (352), a slider (353), and a disc spring (355). The connecting rod (351) is installed below the water wheel (34). The slide groove (352) is formed on the mounting frame (36). The slider (353) is installed below the connecting rod (351) and slides within the slide groove (352). The disc spring (355) is installed between the slider (353) and the mounting frame (36). A blocking block (354) is installed on the mounting frame (36). The circulation mechanism (37) includes a centrifugal net (371), a return spring (372), a telescopic block (373), a replenishment groove (374), and a compression spring (375). The centrifugal net (371) is installed in the mounting frame (36) near the inner ring of the water turbine (34). The return spring (372) is installed between the centrifugal net (371) and the mounting frame (36). The telescopic block (373) is installed below the mounting frame (36). The initial centrifugal net (371) is located above the telescopic block (373). The replenishment groove (374) is opened on the side of the telescopic block (373) away from the inner ring of the water turbine (34). The compression spring (375) is installed below the telescopic block (373).

2. The modular multi-stage filtration device for piped drinking water according to claim 1, characterized in that: The waterwheel (34) is provided with a spiral channel (5), and the surface of the waterwheel (34) is provided with arc-shaped blades (341).

3. The modular multi-stage filtration device for piped drinking water according to claim 1, characterized in that: The centrifugal net (371) is provided with a squeezing part (3711), and the telescopic block (373) is provided with a wedge-shaped part (3731) facing the centrifugal net (371).

4. A modular multi-stage filtration device for piped drinking water according to claim 2, characterized in that: A composite filter element (6) is installed at the center of the water turbine (34). The composite filter element (6) is provided with sintered activated carbon (61), reverse osmosis membrane (62) and post-activated carbon (63) from bottom to top.

5. A modular multi-stage filtration device for piped drinking water according to claim 3, characterized in that: A replacement mechanism (7) is provided below the housing (31). The replacement mechanism (7) includes a mounting groove (71), a pressing block (72), a sliding plate (73), and a compression spring (74). The mounting groove (71) is opened on the side wall of the housing (31). The pressing block (72) is located in the mounting groove (71). The sliding plate (73) is installed in the telescopic block (373). The compression spring (74) is located between the sliding plate (73) and the pressing block (72).

6. A modular multi-stage filtration device for piped drinking water according to claim 2, characterized in that: The blade (341) has a groove (3411) on its surface, and the path of the groove (3411) is downward along the curvature of the blade (341).

Images