A secondary water supply water flow filter switching assembly

Abstract

The application relates to the technical field of secondary water supply equipment, in particular to a secondary water supply water flow filtering and switching assembly, which comprises a water supply pipeline, a water outlet pipeline and a filtering module. The water supply pipeline and the water outlet pipeline are connected and communicated with each other. The filtering module is arranged at the connection position of the water supply pipeline and the water outlet pipeline. The connection position of the water supply pipeline and the water outlet pipeline is provided with a switching device and a locking device. The switching device is used for switching the filtering module. The locking device is used for driving the water supply pipeline and the water outlet pipeline to jointly act on the filtering module to clamp and fix the filtering module. A sealing ring matched with the filtering module is arranged on the locking device. The application aims to provide the secondary water supply water flow filtering and switching assembly, which can realize automatic switching of the filter element of the secondary water supply system, and improve the water supply stability and reliability of the secondary water supply system.

Description

Technical Field

[0001] This invention relates to the field of secondary water supply equipment technology, specifically to a secondary water supply flow filtration and switching component. Background Technology

[0002] Secondary water supply refers to a form of water supply in which units or individuals store and pressurize urban public water supply or self-built facilities water supply, and then supply it to users or for their own use through pipelines. As the last mile between public water supply and user water use, secondary water supply has a crucial impact on the quality and safety of tap water.

[0003] To ensure the cleanliness and safety of water for users, existing secondary water supply systems have begun to use nanofiltration equipment to filter water and improve its quality. However, existing nanofiltration equipment generally only has one nanofiltration membrane water supply unit. Because impurities gradually accumulate on the nanofiltration membrane during use, it needs to be replaced after a period of use. During the replacement of the nanofiltration unit, the entire water supply system needs to be shut down, affecting the normal water supply of the secondary water supply system.

[0004] Admittedly, existing technologies include devices such as the one with patent number CN220633756U, entitled "Online Switching Device for Nanofiltration Equipment," which allows for the replacement of nanofiltration membrane equipment in a secondary water supply system without interrupting the water supply. However, the dual-pipe design in this patent causes a sudden and drastic change in the water flow direction within the secondary water supply system during the replacement operation. This results in significant fluctuations in water pressure in the downstream water supply pipeline, especially at the moment the pipeline containing the commonly used nanofiltration membrane is shut off. In such cases, water hammer may even occur inside the switching device itself, potentially damaging the switching device or even causing leaks and jeopardizing the stable water supply of the system.

[0005] To address this, a secondary water supply flow filtration and switching component is proposed. Summary of the Invention

[0006] The purpose of this invention is to provide a secondary water supply flow filtration switching component, which improves the stability and reliability of the secondary water supply system by enabling automatic switching of the filter cartridges in the secondary water supply system.

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

[0008] A secondary water supply flow filtration switching assembly includes a water supply pipe, an outlet pipe, and a filter module. The water supply pipe and the outlet pipe are interconnected and communicate with each other. The filter module is disposed at the connection between the water supply pipe and the outlet pipe. A switching device and a locking device are provided at the connection between the water supply pipe and the outlet pipe. The switching device is used to switch the filter module, and the locking device is used to drive the water supply pipe and the outlet pipe to work together to clamp and fix the filter module. A sealing ring that cooperates with the filter module is provided on the locking device.

[0009] Based on this design, this invention can introduce tap water from the public water supply network through the water supply pipe, guide it through the filtration module, and finally enter the downstream water supply system through the outlet pipe. After prolonged use, impurities gradually accumulate on the filter element in the filtration module, increasing its resistance to the fluid in the pipe and consequently increasing the pressure drop across the filter element. Upon detecting this increased pressure drop, the switching device is triggered to replace the currently used filter element with a spare filter element. A locking device then secures the replaced spare filter element between the water supply and outlet pipes, sealing it in place. This completes the filter element replacement in the secondary water supply system, ensuring the filtration module's effectiveness in filtering the water in the secondary water supply system.

[0010] Preferably, the switching device includes a liquid distribution hole formed on the side wall of the water supply pipe, and a solenoid valve that cooperates with the liquid distribution hole is fixedly installed on the outer side wall of the water supply pipe. A drain pipe is fixedly installed on the solenoid valve. Both the water supply pipe and the water outlet pipe are square pipes. The joint of the water supply pipe and the water outlet pipe is fitted with a first sealing shell and a second sealing shell, which together form a closed cover. The filter module includes a rectangular mounting frame, and a partition is fixedly installed inside the mounting frame. The partition and the mounting frame together form two fixed frames. A filter element is fixedly installed in each fixed frame. The filter element is rectangular and cooperates with both the water supply pipe and the water outlet pipe. The drain pipe is connected to the end of the first sealing shell away from the mounting frame. A water storage bag is fixedly installed inside the first sealing shell, and the water storage bag is connected to the drain pipe. Two pressure sensors are respectively installed in the water supply pipe and the water outlet pipe, and the two pressure sensors are electrically connected to the solenoid valve.

[0011] With this setup, after prolonged use, impurities will gradually accumulate on the filter cartridges in the filter module, increasing their resistance to the fluid in the pipes. This, in turn, increases the pressure drop across the filter cartridges, meaning the pressure difference between the water supply and outlet pipes increases. This pressure difference is then detected by two pressure sensors, and when it exceeds the control threshold, the locking device and solenoid valve are triggered simultaneously. On one hand, the locking device releases its locking state, allowing the mounting frame of the filter module to move relative to the water supply and outlet pipes. On the other hand, the solenoid valve changes from closed to open, allowing water from the water supply pipe to enter the drainage pipe and be guided along it to the chamber space within the first closed housing, which is enclosed by the first closed housing and the mounting frame. This creates pressurized water within the chamber space, pushing the mounting frame within the closed housing under pressure until the other end of the mounting frame abuts against the second closed housing and cannot move. At this point, the previously used filter element, which was heavily contaminated with impurities, is replaced by a spare filter element, achieving filter element switching. After the filter element replacement, since the new filter element is free of impurities, the pressure difference between the water supply and outlet pipes returns to normal, no longer exceeding the control threshold. The solenoid valve is then closed by the control system, and the locking device re-locks and seals the mounting frame to the water supply and outlet pipes, thus completing the filter element replacement and ensuring the filtration effect of the filter module on the water in the secondary water supply system.

[0012] It is worth noting that in this invention, the filter element is rectangular, while both the water supply and outlet pipes are square. This configuration ensures that the two fixed frames, formed by a partition dividing the mounting frame in two, have equal widths. Therefore, during the process of switching filter elements by water pressure, the projected areas of the two different filter elements on the cross-sections of the water supply and outlet pipes remain complementary. This means the replacement process is gradual, and even during filter element replacement, the invention maintains the filtration effect of the filter module on the water in the secondary water supply system. Thus, this invention allows for filter element replacement without interrupting the water supply. Furthermore, this invention does not require changing the water flow direction in the water supply pipe when replacing the filter element, preventing fluctuations in water pressure or water hammer in the downstream water supply line, thereby improving the stability and reliability of the secondary water supply system.

[0013] In addition, during the replacement of the filter element, after the locking device is released, gaps will inevitably appear between the water supply pipe, the water outlet pipe and the filter module, resulting in water leakage. At this time, the sealed cover formed by the first and second sealed shells can compensate for the water leakage during the replacement of the filter element and prevent water from leaking into the external space.

[0014] Another way to solve this leakage problem is to fix a water storage bag inside the sealed shell and connect the water storage bag to the drainage pipe. Water introduced into the sealed shell through the drainage pipe will be stored in the water storage bag, causing it to expand and push the mounting frame, thus facilitating filter replacement. This method completely solves the leakage problem; however, the propulsion distance is limited by the mechanical properties of the water storage bag, resulting in poor stability and reliability when pushing over long distances.

[0015] Preferably, the locking device includes a first docking ring and a second docking ring, which are respectively fixedly installed on the water supply pipe and the water outlet pipe, and both the first docking ring and the second docking ring cooperate with the sealing cover; multiple drive motors are symmetrically and evenly fixedly installed on the first docking ring, and a drive screw is fixedly installed on the output end of each drive motor; a fixing nut is fixedly installed on the second docking ring, and the drive screw passes through the fixing nut, and the drive screw cooperates with the fixing nut; the fixing frame has mating grooves on both sides corresponding to the water supply pipe and the water outlet pipe, which cooperate with the sealing rings; one sealing ring is fixedly installed on each of the first docking ring and the second docking ring; the two pressure sensors and all drive motors are electrically connected.

[0016] With this setup, when the locking device is tightened, the fixing nuts and the drive motor housing act on docking ring one and docking ring two respectively, pressing them firmly against the mounting frame. This also ensures a tight seal between the sealing rings and the two mating grooves on docking rings one and two. When the two pressure sensors detect that the pressure difference between the water supply and outlet pipes exceeds the control threshold, multiple drive motors operate simultaneously, causing the drive screws to rotate synchronously. This loosens the fixing nuts, and docking rings one and two are no longer tightly fitted with the sealing rings. Consequently, the mounting frame can move relative to the water supply and outlet pipes, thus enabling the switching of the filter element.

[0017] It is important to emphasize that the drive motor should be fixedly mounted on the water supply pipe. This is because in this invention, the water supply pipe is connected to the public water supply system, and the water pressure is relatively stable, so the pipe will usually not vibrate. Therefore, fixing the drive motor on the water supply pipe helps to avoid unnecessary vibration of the drive motor, thereby helping to reduce the risk of drive motor failure due to vibration, extend the service life of the drive motor, and improve the reliability of this invention.

[0018] Preferably, the first and second sealed shells are arranged from top to bottom; the bottom end of the second sealed shell is provided with a pressure relief hole, and a one-way valve is fixedly installed in the pressure relief hole.

[0019] During filter replacement, when the pressurized water in the drain pipe pushes the mounting frame to move within the sealed enclosure, air exists in the space enclosed by the sealed shell and the mounting frame. This air is compressed as the mounting frame moves within the sealed enclosure, generating a force that resists its movement. This can make it difficult for the mounting frame to move and reach the position where it abuts the sealed shell. Therefore, a pressure relief hole and a one-way valve are provided. The one-way valve only allows fluid to flow out from inside the sealed enclosure. Thus, when the mounting frame moves within the sealed enclosure, the air in the space enclosed by the sealed shell and the mounting frame is compressed and can be released outward through the one-way valve, thereby reducing the moving resistance of the mounting frame and ensuring that the mounting frame can move smoothly to the position where it abuts the sealed shell under water pressure, improving the reliability of the invention. In this design, the outlet of the check valve points to the ground. Therefore, if pressurized water enters the space enclosed by the enclosed housing and the mounting frame and is discharged from the check valve, it will be discharged directly to the ground, or discharged in a specific direction depending on the actual installation settings. This facilitates collection and treatment, and helps to prevent this leakage from affecting other equipment or devices in the computer room.

[0020] To address the issue of air inside the second enclosed shell obstructing the movement of the mounting frame, the following alternative solution can be adopted: the first and second enclosed shells are arranged from bottom to top; a pressure relief hole is provided at the top of the second enclosed shell, two blocking nets are fixedly installed inside the pressure relief hole, and a receiving groove is provided on the inner wall of the pressure relief hole. The receiving groove and the two blocking nets together form a receiving cavity, which is partially filled with foam particles.

[0021] With this configuration, when the mounting frame moves within the enclosure, the air in the space between the enclosure and the mounting frame can escape through the gaps between the foam particles, thus preventing the mounting frame from experiencing additional movement resistance. The foam particles are only disturbed by the airflow, so when they move to a location with less airflow, such as the bottom of the receiving tank, they can fall downwards under gravity without completely blocking the pressure relief hole, allowing gas to continuously escape from it. When pressurized water enters the space enclosed by the enclosure and the mounting frame, it first accumulates at the bottom to form a liquid surface. After the air in this space is expelled, the water attempts to escape through the pressure relief hole. The foam particles come into contact with the liquid surface and float under buoyancy. The floating foam particles then block the pressure relief hole and cannot fall, thus firmly sealing it and reducing water leakage. This helps prevent leaked water from damaging other devices and equipment in the computer room.

[0022] The difference between the two solutions is that the former has a simple structure and is easy to implement, but it cannot control the amount of water leaking from the sealed cover when the filter element is replaced, and must be equipped with an additional collection device to deal with the leakage; while the latter can control the amount of water leaking from the sealed cover, but the disadvantage is that the water that accumulates at the bottom of the space enclosed by the second sealed shell and the mounting frame is difficult to drain, and thus continues to stagnate in the space. After the air in the space enclosed by the second sealed shell and the mounting frame is emptied, this water may become another source of resistance to the movement of the mounting frame (similar to how air hinders the movement of the mounting frame).

[0023] Preferably, a compensating rubber ring is fixedly installed on the inner wall of both the water supply pipe and the water outlet pipe. The compensating rubber ring includes an installation part and a compensating part. The compensating part is fixedly connected to the water supply pipe or water outlet pipe corresponding to the compensating rubber ring, and the compensating part cooperates with the fixing frame.

[0024] By setting a compensating rubber ring, when the locking device is locked, the compensating part of the compensating rubber ring will cover the edge of the fixed frame and form a curved shape. At this time, the water pressure in the water supply pipe and the water outlet pipe will be able to press the compensating part tightly onto the fixed frame. The greater the water pressure in the pipe, the more firmly the compensating part can fit onto the fixed frame. Thus, the compensating rubber ring can adapt to the water pressure in the pipe and generate corresponding sealing strength, which helps to improve the sealing performance of the present invention.

[0025] Furthermore, when the mounting frame slides within the enclosed enclosure, the compensating rubber ring also performs the aforementioned function. Therefore, even if the locking device releases its locking state, causing the fit between the sealing ring and the mating groove to become less tight, the compensating rubber ring can still compensate for this lack of sealing capacity, thereby improving the sealing performance of the invention and reducing leakage during operation. Moreover, reducing leakage also lowers the drainage pressure of the pressure relief hole, helping to reduce the amount of water entering the space enclosed by the enclosed shell and the mounting frame. This reduces the risk of water accumulation in this space hindering the movement of the mounting frame when using the aforementioned foam float technology, thus improving the stability and reliability of the technical solution.

[0026] Preferably, both the water supply pipe and the water outlet pipe are equipped with a still water tank.

[0027] Because the water supply pipes use a shape different from traditional circular pipes, a settling tank is installed to reduce pressure loss caused by changes in the pipe's cross-section. The cross-sectional projected area of ​​the settling tank is larger than that of the water supply pipe, allowing the incoming water to fill the tank and form a large, pressure-stable body of water. This helps maintain the original water pressure as much as possible when supplying water downstream. A settling tank is also installed at the outlet pipe for the same reason. This design reduces the impact of changes in the pipe's cross-sectional shape on the water pressure in the water supply system.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0029] 1. By incorporating a switching device, a locking device, and a filtration module, this invention enables the replacement of filter cartridges in a secondary water supply system, ensuring the filtration effect of the filtration module on the water in the system. Furthermore, this invention allows for filter cartridge replacement without interrupting the water supply. Additionally, this invention does not require changing the water flow direction in the supply pipe when replacing the filter cartridge, thus preventing pressure fluctuations or water hammer in the downstream supply pipeline, thereby improving the stability and reliability of the secondary water supply system.

[0030] 2. By setting a compensating rubber ring, when the locking device is locked, the compensating part of the compensating rubber ring will cover the edge of the fixed frame and form a curved shape. At this time, the water pressure in the water supply pipe and the water outlet pipe will be able to press the compensating part tightly onto the fixed frame. The greater the water pressure in the pipe, the more firmly the compensating part can fit onto the fixed frame. Thus, the compensating rubber ring can adapt to the water pressure in the pipe and generate corresponding sealing strength, which helps to improve the sealing performance of the present invention, thereby improving the stability and reliability of the secondary water supply system.

[0031] 3. By setting up a water storage bag and connecting the water storage bag to the drainage pipe, the water introduced into the closed shell through the drainage pipe will be stored in the water storage bag, causing the water storage bag to expand and push the mounting frame, thereby realizing the replacement of the filter element. At the same time, it can solve the problem of water leakage between the water supply pipe, water outlet pipe and filter module caused by the locking device being released during the replacement of the filter element. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of the present invention;

[0033] Figure 2 for Figure 1 A magnified view of part A in the middle;

[0034] Figure 3 for Figure 1 A frontal sectional view;

[0035] Figure 4 for Figure 3 A magnified view of part B in the middle section;

[0036] Figure 5 for Figure 3 A schematic diagram of the structure after pressurized water is introduced into the water storage bag through the drainage pipe;

[0037] Figure 6 for Figure 1 A schematic diagram of the structure after removing the first closed shell, the second closed shell, and the drainage tube;

[0038] Figure 7 for Figure 6 A magnified view of part C in the middle;

[0039] Figure 8 This is a front sectional view of the second embodiment of the present invention;

[0040] Figure 9 for Figure 8 A magnified view of part D in the middle.

[0041] In the diagram: 1. Public water supply pipe; 2. Static water tank; 3. Water supply pipe; 4. Water outlet pipe; 5. User pipeline; 6. Drainage pipe; 7. Enclosed shell one; 8. Enclosed shell two; 9. Drive screw; 21. Pressure sensor; 31. Connecting ring one; 32. Drive motor; 33. Solenoid valve; 41. Connecting ring two; 42. Fixing nut; 43. Sliding groove; 71. Sliding block; 72. Water storage bag; 81. Check valve; 82. Mounting frame; 83. Pressure relief hole; 84. Round pipe; 311. Compensating rubber ring; 312. Sealing ring; 821. Filter element; 822. Partition plate; 831. Receiving tank; 832. Foam particles; 833. Barrier net; 3111. Mounting part; 3112. Compensating part. Detailed Implementation

[0042] The following description, with the aid of the accompanying drawings listed in the foregoing "Description of Drawings", will clearly illustrate the specific embodiments of the present invention, in order to enable readers to have a more complete and objective understanding of the working principle and corresponding technical effects of the present invention.

[0043] like Figures 1 to 7 The diagram illustrates a first specific embodiment of the present invention. It should be noted beforehand that, as... Figure 2As shown, to facilitate the installation of the first enclosure 7 and the second enclosure 8, and to ensure the normal use of the invention, sliding blocks 71 are fixedly installed on the first enclosure 7 and the second enclosure 8, respectively. Sliding grooves 43 that cooperate with the sliding blocks 71 are formed on the first docking ring 31 and the second docking ring 41. Therefore, when installing the first enclosure 7 and the second enclosure 8 onto the first docking ring 31 and the second docking ring 41, the sliding blocks 71 can be inserted into the sliding grooves 43. The method for forming the sliding grooves 43 can be referred to... Figure 7 As shown, the sliding groove 43 restricts the displacement of the first closed shell 7 and the second closed shell 8. Then, by using a threaded connection, the first closed shell 7 and the second closed shell 8 are fixedly connected, thus forming a closed cover. It should be added that, as... Figure 2 As shown, there should be a certain clearance between the sliding groove 43 and the sliding block 71 so that the drive motor 32 has sufficient space to move when driving the first docking ring 31 and the second docking ring 41 without interfering with the components in this invention. Specifically, Figure 2 The scenario depicts a situation where both docking ring 31 and docking ring 41 are tightly pressing against the sealing ring 312. In this case, the drive motor 32 drives docking ring 31 and docking ring 41 to move in opposite directions. That is, when the pressure on the sealing ring 312 is released, docking ring 31 and docking ring 41 can move relative to the enclosure without causing compression deformation to the sealing shell 7 or the sealing shell 8.

[0044] When the present invention is installed, firstly, the water supply pipe 3, the water outlet pipe 4, and the filter module are removed. The water supply pipe 3 and the water outlet pipe 4 are connected to each other and communicate with each other. The filter module is set at the connection between the water supply pipe 3 and the water outlet pipe 4. The filter module includes multiple filter elements 821. A switching device and a locking device are provided at the connection between the water supply pipe 3 and the water outlet pipe 4. The switching device is used to switch the filter module, and the locking device is used to drive the water supply pipe 3 and the water outlet pipe 4 to work together to clamp and fix the filter module. A sealing ring 312 that cooperates with the filter module is provided on the locking device.

[0045] The switching device includes a liquid distribution hole on the side wall of the water supply pipe 3. A solenoid valve 33, which cooperates with the liquid distribution hole, is fixedly installed on the outer wall of the water supply pipe 3. A drain pipe 6 is fixedly installed on the solenoid valve 33. Both the water supply pipe 3 and the water outlet pipe 4 are square pipes. The joint of the water supply pipe 3 and the water outlet pipe 4 is fitted with a first sealing shell 7 and a second sealing shell 8, which together form a sealed cover. The filter module includes a rectangular mounting frame 82. A partition 822 is fixedly installed inside the mounting frame 82. The partition 822 and the mounting frame 82 together form two fixed frames. Multiple filter elements 821 are fixedly installed in each fixed frame. The filter elements 821 are rectangular and cooperate with both the water supply pipe 3 and the water outlet pipe 4. The drain pipe 6 is connected to the end of the first sealing shell 7 away from the mounting frame 82. Two pressure sensors 21 are respectively installed in the water supply pipe 3 and the water outlet pipe 4. The two pressure sensors 21 are electrically connected to the solenoid valve 33. The locking device includes a first docking ring 31 and a second docking ring 41, which are respectively fixedly installed on the water supply pipe 3 and the water outlet pipe 4. The first docking ring 31 and the second docking ring 41 cooperate with each other, and both the first docking ring 31 and the second docking ring 41 cooperate with the sealing cover. Multiple drive motors 32 are symmetrically and evenly fixedly installed on the first docking ring 31. A drive screw 9 is fixedly installed on the output end of each drive motor 32. A fixing nut 42 is fixedly installed on the second docking ring 41. The drive screw 9 passes through the fixing nut 42, and the drive screw 9 cooperates with the fixing nut 42. The fixing frame has mating grooves on both sides corresponding to the water supply pipe 3 and the water outlet pipe 4, which cooperate with the sealing ring 312. One sealing ring 312 is fixedly installed on each of the first docking ring 31 and the second docking ring 41. The two pressure sensors 21 and all drive motors 32 are electrically connected.

[0046] In addition, the first sealed shell 7 and the second sealed shell 8 are arranged from top to bottom; the bottom end of the second sealed shell 8 is provided with a pressure relief hole 83, and a one-way valve 81 is fixedly installed in the pressure relief hole 83. Furthermore, a compensating rubber ring 311 is fixedly installed on the inner wall of the water supply pipe 3 and the water outlet pipe 4. The compensating rubber ring 311 includes an installation part 3111 and a compensating part 3112. The compensating part 3112 is fixedly connected to the water supply pipe 3 or the water outlet pipe 4 corresponding to the compensating rubber ring 311, and the compensating part 3112 cooperates with the fixed frame.

[0047] When this invention is in operation, tap water from the public water supply pipe 1 is introduced from the water supply pipe 3 and guided through the filter module, finally entering the downstream water supply system from the outlet pipe 4. When the filter element 821 on the filter module is used for a long time, impurities gradually accumulate on it, which increases its resistance to the fluid in the pipe, and consequently increases the liquid pressure drop before and after the filter element 821. That is to say, the pressure difference of the fluid in the water supply pipe 3 and the outlet pipe 4 becomes larger. Therefore, this pressure difference is detected by the two pressure sensors 21. When the pressure difference exceeds the control threshold, the locking device and the solenoid valve 33 are triggered simultaneously. On one hand, the locking device is released, allowing the mounting frame 82 of the filter module to move relative to the water supply pipe 3 and the water outlet pipe 4. On the other hand, the solenoid valve 33 changes from a closed state to an open state, allowing water in the water supply pipe 3 to enter the drainage pipe 6 and be guided along the drainage pipe 6 to the chamber space enclosed by the closed shell 7 and the mounting frame 82, thereby forming pressurized water in this chamber space. Specifically, in this embodiment, a water storage bag 72 is fixedly installed inside the closed shell 7 and is connected to the drainage pipe 6. Thus, water introduced into the closed shell 7 through the drainage pipe 6 is stored in the water storage bag 72, causing the water storage bag 72 to expand and push the mounting frame 82. Under water pressure, the mounting frame 82 is pushed within the enclosed enclosure until its other end abuts against the enclosed housing 8 and cannot move. At this point, the previously used filter element 821, which was covered with a large amount of impurities, is replaced by the spare filter element 821, thus switching the filter element 821. After the filter element 821 is replaced, since the new filter element 821 has no accumulated impurities, the pressure difference between the water supply pipe 3 and the water outlet pipe 4 will return to normal, and the pressure difference will no longer exceed the control threshold. Therefore, the solenoid valve 33 is closed by the control system, and at the same time, the locking device locks and seals the mounting frame 82 to the water supply pipe 3 and the water outlet pipe 4 again. This completes the replacement of the filter element 821, ensuring the filtration effect of the filter module on the water in the secondary water supply system. The filtered water flows from the water outlet pipe 4 through the static water tank 2 installed on it, and then reaches the user pipe 5 for user use.

[0048] The locking device works by tightly pressing the two mating grooves on the second mating ring 41 to achieve a seal. When the two pressure sensors 21 detect that the pressure difference between the water supply pipe 3 and the water outlet pipe 4 exceeds the control threshold, multiple drive motors 32 act simultaneously, causing the drive screw 9 to rotate synchronously. With the cooperation of the fixing nut 42, the first mating ring 31 and the second mating ring 41 will move in opposite directions. As a result, the sealing ring 312 is no longer tightly pressed, and the mounting frame 82 can move relative to the water supply pipe 3 and the water outlet pipe 4, thereby enabling the switching of the filter element 821.

[0049] During the replacement of filter element 821, when the pressurized water in the drain pipe 6 pushes the mounting frame 82 to move within the sealed enclosure, air exists in the space enclosed by the sealed shell 8 and the mounting frame 82. This air is compressed as the mounting frame 82 moves within the sealed enclosure, generating a force that resists the movement of the mounting frame 82. This may make it difficult for the mounting frame 82 to move and reach the position where it abuts against the sealed shell 8. Therefore, a pressure relief hole 83 and a one-way valve 81 are provided. The one-way valve 81 only allows fluid to flow out from inside the sealed enclosure. Thus, when the mounting frame 82 moves within the sealed enclosure, the air in the space enclosed by the sealed shell 8 and the mounting frame 82 is compressed and can be released outward through the one-way valve 81, thereby reducing the moving resistance of the mounting frame 82 and ensuring that the mounting frame 82 can move smoothly to the position where it abuts against the sealed shell 8 under water pressure, improving the reliability of the invention. In this design, the outlet of the one-way valve 81 points to the ground. Therefore, during the replacement of the filter element 821, if the sealing performance decreases due to the sealing ring 312 not being tightly squeezed and water leakage occurs, the pressurized water will enter the space enclosed by the closed shell 8 and the mounting frame 82 and be discharged from the one-way valve 81. It will be discharged directly to the ground, or discharged in a specific direction depending on the actual installation settings, which facilitates collection and treatment and helps to prevent this leakage from affecting other equipment or devices in the machine room.

[0050] like Figure 8 and Figure 9 The diagram illustrates a second embodiment of the invention, which differs from the first embodiment in that the first and second enclosures 7 and 8 are arranged from bottom to top. A pressure relief hole 83 is provided at the top of the second enclosure 8. Specifically, a circular tube 84 is inserted into the top of the second enclosure 8, with the channel of the tube 84 serving as the pressure relief hole 83. Two baffles 833 are then fixedly installed within the pressure relief hole 83. A receiving groove 831 is formed on the inner wall of the pressure relief hole 83. The receiving groove 831 and the two baffles 833 together form a receiving cavity, which is partially filled with foam particles 832. Specifically, the foam particles 832 have a 50% filling rate within the receiving cavity.

[0051] At this time, when the mounting frame 82 moves within the enclosed enclosure, the air in the space between the enclosed shell 8 and the mounting frame 82 will be able to escape through the gaps between the foam particles 832, thus preventing the mounting frame 82 from experiencing additional movement resistance. The foam particles 832 are only disturbed by the airflow. Therefore, when the foam particles 832 move to a position with less airflow, such as the bottom of the receiving groove 831, they can fall downwards under gravity without completely blocking the pressure relief hole 83, allowing gas to continuously escape from the pressure relief hole 83. Meanwhile, when the enclosed enclosure... When pressurized water enters the space enclosed by the enclosed shell 8 and the mounting frame 82, the water will first gather at the bottom of the space enclosed by the enclosed shell 8 and the mounting frame 82 to form a liquid surface. After the air in the space is vented, when the water tries to be discharged from the pressure relief hole 83, the foam particles 832 come into contact with the liquid surface and float up under the action of buoyancy. At this time, the floating foam particles 832 will block the pressure relief hole 83 and cannot fall down. Thus, the pressure relief hole 83 will be firmly blocked, thereby reducing water leakage and helping to prevent the leaked water from damaging other devices and equipment in the machine room.

[0052] Compared with the first embodiment, the difference between the two solutions is that the first embodiment has a simple structure and is easy to implement and design, but it cannot control the amount of water leaking from the pressure relief hole 83 of the closed cover during the replacement of the filter element 821, and must be equipped with an additional collection device to deal with the leakage; while this embodiment can control the amount of water leaking from the closed cover, but the disadvantage is that the water that accumulates at the bottom of the space enclosed by the second closed shell 8 and the mounting frame 82 is difficult to drain, and thus continues to stagnate in the space. After the air in the space enclosed by the second closed shell 8 and the mounting frame 82 is emptied, this water may become another source of resistance to the movement of the mounting frame 82 (similar to the air hindering the movement of the mounting frame 82).

[0053] It should be emphasized that, based on the content described above, although the beneficial effects of the present invention have been explained in detail and corresponding specific embodiments have been provided, those skilled in the art can still achieve the same technical effects by making conventional substitutions, modifications, or other alterations to the given technical solutions without creative effort, provided they fully understand the working principle of the present invention. However, such modifications should not be considered as exceeding the scope of the present invention. Specifically, the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A secondary water supply flow filtration and switching component, characterized in that, The system includes a water supply pipe (3), an outlet pipe (4), and a filter module. The water supply pipe (3) and the outlet pipe (4) are interconnected and communicate with each other. The filter module is located at the connection between the water supply pipe (3) and the outlet pipe (4). The filter module includes multiple filter elements (821). A switching device and a locking device are provided at the connection between the water supply pipe (3) and the outlet pipe (4). The switching device is used to switch the filter module. The locking device is used to drive the water supply pipe (3) and the outlet pipe (4) to work together to clamp and fix the filter module. A sealing ring (312) that cooperates with the filter module is provided on the locking device. A drain pipe (6) is provided in the switching device to drive the filter elements (821) to be replaced in sequence. The switching device includes a liquid distribution hole on the side wall of the water supply pipe (3), and a solenoid valve (33) that cooperates with the liquid distribution hole is fixedly installed on the outer side wall of the water supply pipe (3). The drainage pipe (6) is fixedly installed on the solenoid valve (33). The water supply pipe (3) and the water outlet pipe (4) are both square pipes. The connection between the water supply pipe (3) and the water outlet pipe (4) is fitted with a first sealing shell (7) and a second sealing shell (8). The first sealing shell (7) and the second sealing shell (8) are combined to form a closed cover. The filter module includes a rectangular mounting frame (82). The mounting frame (82) is fixed inside. A partition (822) is fixedly installed, and the partition (822) and the mounting frame (82) together form two fixed frames. Multiple filter elements (821) are fixedly installed in each fixed frame one by one. The filter element (821) is rectangular, and the filter element (821) cooperates with the water supply pipe (3) and the water outlet pipe (4). The drain pipe (6) is connected to the end of the closed shell (7) away from the mounting frame (82). Two pressure sensors (21) are respectively installed in the water supply pipe (3) and the water outlet pipe (4). The two pressure sensors (21) are electrically connected to the solenoid valve (33).

2. The secondary water supply flow filtration switching component according to claim 1, characterized in that, The locking device includes a first docking ring (31) and a second docking ring (41) fixedly installed on the water supply pipe (3) and the water outlet pipe (4) respectively, and the first docking ring (31) and the second docking ring (41) cooperate with the enclosure; multiple drive motors (32) are symmetrically and evenly fixedly installed on the first docking ring (31), and a drive screw (9) is fixedly installed on the output end of each drive motor (32). A fixing nut (42) is fixedly installed on the second docking ring (41), and the drive screw (9) passes through the fixing nut (42), and the drive screw (9) cooperates with the fixing nut (42); the fixing frame has a mating groove on both sides corresponding to the water supply pipe (3) and the water outlet pipe (4) that cooperates with the sealing ring (312), and one sealing ring (312) is fixedly installed on the first docking ring (31) and the second docking ring (41); the two pressure sensors (21) and all drive motors (32) are electrically connected.

3. The secondary water supply flow filtration switching component according to claim 2, characterized in that, The first closed shell (7) and the second closed shell (8) are arranged from top to bottom; the bottom end of the second closed shell (8) is provided with a pressure relief hole (83), and a one-way valve (81) is fixedly installed in the pressure relief hole (83).

4. The secondary water supply flow filtration switching component according to claim 2, characterized in that, The first closed shell (7) and the second closed shell (8) are arranged from bottom to top; the top of the second closed shell (8) is provided with a pressure relief hole (83), and two blocking nets (833) are fixedly installed in the pressure relief hole (83). A receiving groove (831) is opened on the inner wall of the pressure relief hole (83). The receiving groove (831) and the two blocking nets (833) together form a receiving cavity, and the receiving cavity is partially filled with foam particles (832).

5. A secondary water supply flow filtration and switching component according to claim 2, characterized in that, Compensating rubber rings (311) are fixedly installed on the inner walls of the water supply pipe (3) and the water outlet pipe (4). The compensating rubber ring (311) includes an installation part (3111) and a compensating part (3112). The compensating part (3112) is fixedly connected to the water supply pipe (3) or the water outlet pipe (4) corresponding to the compensating rubber ring (311). The compensating part (3112) cooperates with the fixing frame.

6. A secondary water supply flow filtration and switching component according to claim 2, characterized in that, Both the water supply pipe (3) and the water outlet pipe (4) are equipped with static water tanks (2).

7. The secondary water supply flow filtration and switching component according to claim 1, characterized in that, A water storage bag (72) is fixedly installed inside the closed shell (7), and the water storage bag (72) is connected to the drainage pipe (6).

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