Building energy-saving drainage system

Abstract

The application relates to a building energy-saving drainage system, which comprises a water tank, a water inlet pipe and a water outlet pipe fixedly communicated with the water tank, two filters slidably connected in the water tank, first scrapers fixedly connected with the filters one by one on the water tank, the lower surfaces of the first scrapers being flush with the upper surfaces of the corresponding filters, a collecting tank fixedly connected in the water tank and located below the two filters, a plurality of limiting springs fixedly connected to the sides of the two filters away from each other and fixedly connected with the corresponding side walls of the water tank, an extension rod fixedly connected to the inner bottom wall of the water tank and located between the two filters, the extension end of the extension rod being upward, a hinged rod hinged to the filter and hinged to the extension end of the extension rod at the end away from the filter, and a driving member for driving the extension end of the extension rod to move. The application has the effect of reducing the adverse influence on the service life of the filter.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of energy-saving building devices, in particular to a building energy-saving drainage system. BACKGROUND

[0002] Building energy saving refers to improving the operation efficiency of heating, refrigeration, lighting, ventilation, water supply and drainage, and pipeline system during the process of site selection, planning, design, construction and use, and reducing building energy consumption and rationally and effectively using energy on the premise of ensuring the function of buildings and the quality of indoor thermal environment.

[0003] The drainage system usually comprises a water tank, a water inlet pipe and a water outlet pipe fixedly connected to the water tank, the water inlet pipe being in communication with a plurality of drainage pipes, and the water in the water tank being filtered by a filter, and the filtered water being discharged from the water tank through the water outlet pipe, so that the water discharged from the water tank can be reused to achieve the purpose of saving water resources.

[0004] Since the water entering the water tank may carry impurities with large particle size, the impurities with large particle size adhere to the surface of the filter, which adversely affects the service life of the filter. SUMMARY

[0005] In order to reduce the adverse effects on the service life of the filter, the present application provides a building energy-saving drainage system.

[0006] The building energy-saving drainage system provided by the present application adopts the following technical scheme:

[0007] A building energy-saving drainage system comprises a water tank, a water inlet pipe and a water outlet pipe fixedly connected to the water tank, two filters slidably connected in the water tank, the two filters sliding along the connecting line direction of the two filters, a first scraper fixedly connected to the water tank and corresponding to the filters, the first scraper being in contact with the upper surface of the filter, a collection tank fixedly connected in the water tank and located below the two filters.

[0008] The side wall of each of the two filters close to each other is fixedly connected with a deformable matching plate, and the side of each of the two filters away from each other is fixedly connected with a plurality of limiting springs, the limiting springs being fixedly connected to the corresponding side wall of the water tank.

[0009] An extension rod is fixedly connected to the inner bottom wall of the water tank, the extension rod being located between the two filters, the extension end of the extension rod facing upward, a hinge rod being hingedly connected to the filter, and the end of the hinge rod away from the filter being hingedly connected to the extension end of the extension rod.

[0010] The drainage system also includes a drive mechanism that moves the telescopic end of the telescopic rod.

[0011] By adopting the above technical solution, in the initial state, the two first scrapers are located between the two filters, and water flows into the water tank through the inlet pipe. At the same time, the driving component works to drive the telescopic end of the telescopic rod to move downward. The telescopic end of the telescopic rod moves and presses the corresponding end of the hinge rod to move downward, thereby causing the hinge rod to rotate and pull the filter to move. This moves the two filters to below the inlet pipe, and at the same time, the filter stretches the limit spring. The filter contacts the first scraper, and the first scraper gradually moves to the side of the filter away from the other filter until the two filters contact and filter the water.

[0012] After filtration is complete, the drive mechanism activates, and the telescopic end of the telescopic rod moves upward. This movement of the drive rod causes the hinge rod to move upward, while the limit spring returns to its original shape and pulls the corresponding filter to move. This causes the two filters to move away from each other, resulting in relative movement between the filters and the first scraper. This allows the first scraper to remove large-diameter debris accumulated on the upper surface of the filters. When the filters return to their initial position, the first scraper scrapes the debris onto the filter into the collection box, reducing the occurrence of large-diameter debris covering the upper surface of the filters and thus minimizing the adverse effects on the filter's lifespan.

[0013] Optionally, the driving component is a water storage cylinder that is slidably inserted into the water inlet pipe. The side wall of the water storage cylinder is in contact with the inner side wall of the water inlet pipe. A water leakage hole is provided on the side wall of the water storage cylinder. The end face of the water storage cylinder is connected to the telescopic end of the telescopic rod.

[0014] By adopting the above technical solution, in the initial state, the water storage cylinder is located in the water inlet pipe. After water enters the water storage cylinder, it is stored in the water storage cylinder. As the water in the water storage cylinder gradually increases, the water storage cylinder moves downward and compresses the telescopic rod, thereby driving the telescopic end of the telescopic rod to move downward. When the water storage cylinder moves downward until the water leakage hole is outside the water inlet pipe, the water flows out of the water storage cylinder. As the water in the water storage cylinder gradually decreases, the telescopic rod restores its deformation and pushes the water storage cylinder upward until the water storage cylinder returns to its initial position. The water storage cylinder is ready to store the next batch of water.

[0015] Optionally, the telescopic rod includes a sleeve fixedly connected to the bottom wall of the water tank, a support rod slidably inserted into the sleeve, a support spring fixedly connected to the lower end of the support rod, the lower end of the support spring fixed to the bottom wall of the sleeve, a hinge rod hinged to the support rod, and a water storage cylinder fixedly connected to the upper end of the support rod.

[0016] By adopting the above technical solution, when the water in the water tank gradually increases, the water tank moves downward by pressing the support rod and the hinge rod, and the movement of the support rod compresses the support spring; when the water in the water tank gradually decreases, the support spring recovers its deformation and pushes the support rod and the water tank upward; when the support spring stops deforming, the water tank and the support rod no longer move, and at this time the water tank is located in the water inlet pipe.

[0017] Optionally, the bottom of the housing is provided with a second scraper, which contacts the inner bottom wall of the water tank. The water tank is also provided with a transmission assembly that transmits the force generated when the filter moves to the second scraper.

[0018] By adopting the above technical solution, the transmission component provides power to the second scraper, thereby driving the second scraper to move and scrape the inner bottom wall of the water tank, reducing the formation of a film on the inner bottom wall of the water tank, thereby reducing the workload of operators in cleaning the water tank.

[0019] Optionally, the transmission assembly includes an upper rack and a lower rack corresponding to the upper rack. Both the upper rack and the lower rack are slidably connected to the water tank. Each upper rack is fixedly connected to a corresponding filter, and each lower rack is fixedly connected to a corresponding second scraper. A gear is provided between the upper rack and the corresponding lower rack to mesh with them, and the gear is rotatably connected to the water tank.

[0020] By adopting the above technical solution, when the filter moves, the filter drives the upper rack to move, the upper rack moves and drives the gear to rotate, the gear rotates and drives the lower rack and the second scraper to move, so that the second scraper moves relative to the inner bottom wall of the water tank, thereby scraping off the film on the inner bottom wall of the water tank.

[0021] Optionally, connecting blocks are fixedly connected to both the upper and lower racks, and connecting grooves adapted to the connecting blocks are provided on the inner sidewall of the water tank. The length direction of the connecting grooves is set along the sliding direction of the filter, and each connecting block is slidably inserted into the corresponding connecting groove.

[0022] By adopting the above technical solution, the connecting block and the connecting groove cooperate to make both the upper and lower racks slide in contact with the water tank.

[0023] Optionally, a rotating shaft coaxially arranged with the gear is fixedly connected to the gear, and the rotating shaft passes through the gear and is rotatably connected to the water tank.

[0024] By adopting the above technical solution, the rotating shaft enables the gear to engage with the vertical rotation.

[0025] Optionally, a spiral stirring plate is fixedly connected to the rotating shaft.

[0026] By adopting the above technical solution, when the gear rotates, the gear drives the rotating shaft and the spiral stirring plate to rotate, so that the spiral stirring plate stirs the water in the water tank, reducing the natural settling of impurities in the water at the bottom of the water tank, thereby reducing the formation of a film at the bottom of the water tank.

[0027] Optionally, both the sleeve and the support rod have rectangular cross-sections.

[0028] By adopting the above technical solution, the sleeve limits the support rod, reducing the occurrence of the support rod rotating in its circumferential direction while moving along its own axis, thereby reducing the occurrence of bending of the hinge rod.

[0029] Optionally, the filter housing is provided with a screen cage, and the two screen cages are open on the side that is close to each other, and the mating plate is inserted into the open part of the screen cage.

[0030] By adopting the above technical solution, the screen cage filters large-diameter impurities, and the water filtered by the screen cage flows into the filter for a second filtration, which reduces the situation where large-diameter impurities cover the filter surface and further reduces the adverse effects on the filter's service life.

[0031] In summary, this application includes at least one of the following beneficial technical effects:

[0032] 1. By incorporating a water tank, filter, telescopic rod, hinge rod, limit spring, first scraper, and power components, the adverse effects on the filter's lifespan are reduced;

[0033] 2. By setting up a second scraper, upper rack, gear and lower rack, the bottom wall of the water tank is scraped, reducing the workload of the operator in cleaning the water tank;

[0034] 3. By setting up a rotating shaft and a spiral stirring plate, the natural settling of debris in the water at the bottom of the tank is reduced, further minimizing the adverse effects on the filter's lifespan. Attached Figure Description

[0035] Figure 1 This is a cross-sectional view illustrating the overall structure of the drainage system in an embodiment of this application.

[0036] Figure 2 This is a cross-sectional view illustrating a portion of the structure of the sliding component in an embodiment of this application.

[0037] Figure 3 This is a cross-sectional view illustrating the connection between the upper rack and the water tank in an embodiment of this application.

[0038] Explanation of reference numerals in the attached drawings: 1. Water tank; 11. Inlet pipe; 12. Outlet pipe; 13. Connecting groove; 2. Screen cage; 21. Matching plate; 22. Limiting spring; 3. Filter; 4. First scraper; 5. Collection box; 6. Sliding assembly; 61. Telescopic rod; 611. Sleeve; 612. Support spring; 613. Support rod; 62. Hinge rod; 63. Driving component; 7. Second scraper; 8. Transmission assembly; 81. Upper rack; 82. Lower rack; 83. Connecting block; 84. Gear; 85. Rotating shaft; 86. Spiral stirring plate. Detailed Implementation

[0039] The following is in conjunction with the appendix Figures 1-3 This application will be described in further detail.

[0040] This application discloses an energy-saving drainage system for buildings. (Refer to...) Figure 1 The drainage system includes a water tank 1, with an inlet pipe 11 fixedly connected to the top surface of the water tank 1. Wastewater such as washing water, kitchen water, and laundry water flows into the water tank 1 through the inlet pipe 11. An outlet pipe 12 is fixedly connected to one of the side walls of the water tank 1.

[0041] Reference Figure 1 and Figure 2 The water tank 1 contains two horizontally placed screen cages 2, each with multiple screen holes. The screen cages 2 are located between the inlet pipe 11 and the outlet pipe 12. The two screen cages 2 are close to each other and open on one side. The screen cages 2 are slidably connected to the water tank 1, and the two screen cages 2 slide along the line connecting them. Each screen cage 2 contains a plate-shaped filter 3. A deformable mating plate 21 is inserted into the open side of the screen cage 2. One side of the mating plate 21 protrudes from the screen cage 2. In this embodiment, the mating plate 21 is made of rubber.

[0042] Several limiting springs 22 are fixedly connected to the side walls of the two screen cages 2 that are far apart from each other. In this embodiment, there are two limiting springs 22. The two limiting springs 22 are evenly distributed along the length of the screen cage 2. The end of the limiting spring 22 that is far away from the screen cage 2 is fixedly connected to the inner side wall of the water tank 1. The limiting springs 22 limit the screen cage 2, so that there is a gap between the two screen cages 2.

[0043] A first scraper 4 corresponding to the sieve cage 2 is fixedly connected in the water tank 1. The lower surface of the first scraper 4 is at the same horizontal height as the upper surface of the corresponding sieve cage 2. The length direction of the first scraper 4 is set along the length direction of the sieve cage 2. In this embodiment, the first scraper 4 is fixedly connected to the side wall of the water tank 1. When the limiting spring 22 is in the natural state, each first scraper 4 is located between two sieve cages 2.

[0044] A collection box 5 is fixedly connected in the water tank 1. The length direction of the collection box 5 is consistent with the length direction of the screen cage 2. The collection box 5 is located below the two screen cages 2 on the side that are close to each other, and the collection box 5 is located above the water outlet pipe 12. Multiple screen holes are opened on the collection box 5.

[0045] The water tank 1 is also equipped with a sliding assembly 6 that drives the two screen cages 2 to move. When the sliding assembly 6 works, it drives the screen cages 2 to move, and the screen cages 2 and the first scraper 4 move relative to each other. As a result, the first scraper 4 can scrape the debris attached to the upper surface of the screen cages 2 and collect it in the collection box 5. The sliding assembly 6 includes a telescopic rod 61 that is fixedly connected to the bottom wall of the water tank 1. The telescopic rod 61 passes through the collection box 5 and is located between the two screen cages 2. The telescopic rod 61 is also located between the two first scrapers 4. The length of the telescopic rod 61 is set along the height of the water tank 1.

[0046] The telescopic rod 61 includes a sleeve 611 fixedly connected to the inner bottom wall of the water tank 1. A support spring 612 is fixedly connected to the inner bottom wall of the sleeve 611. A support rod 613 is fixedly connected to the upper end of the support spring 612, and the support rod 613 is slidably inserted into the sleeve 611. The sliding assembly 6 also includes a hinge rod 62 hinged to the lower surface of the screen cage 2. The hinge point between the hinge rod 62 and the screen cage 2 is located on the side near the limiting spring 22. The end of the hinge rod 62 away from the screen cage 2 is hinged to the side wall of the support rod 613. The collection box 5 is located above the hinge rod 62. In this embodiment, the cross-sections of the sleeve 611 and the support rod 613 are rectangular, which reduces the possibility of the support rod 613 rotating and causing the hinge rod 62 to bend under force when it moves.

[0047] The sliding assembly 6 also includes a drive component 63 disposed in the water inlet pipe 11. In this embodiment, the drive component 63 is a water storage cylinder that is slidably inserted into the water inlet pipe 11. The side wall of the water storage cylinder is in contact with the inner side wall of the water inlet pipe 11. The top of the water storage cylinder is open. Multiple water leakage holes are provided on the side wall of the water storage cylinder. The upper end of the support rod 613 extends into the water inlet pipe 11, and the upper end of the support rod 613 is fixed to the lower end face of the water storage cylinder. In other embodiments, the drive component 63 can also be a cylinder or a hydraulic cylinder. The working end of the cylinder or the hydraulic cylinder is fixed to the upper end of the support rod 613.

[0048] In the initial state, the limiting spring 22 is in its natural state, the water storage cylinder is completely located in the water inlet pipe 11, and the first scraper 4 is located between the two screen cages 2. When water enters the water inlet pipe 11, the water accumulates in the water storage cylinder. As the water in the water storage cylinder gradually increases, the water storage cylinder gradually moves downward by pressing the support rod 613. The movement of the support rod 613 compresses the support spring 612, and at the same time, the support rod 613 drives the corresponding end of the hinge rod 62 to move downward.

[0049] While the hinge rod 62 moves, it also rotates, causing the end of the hinge rod 62 near the screen cage 2 to move towards the support rod 613. The hinge rod 62 drives the corresponding screen cage 2 to move, causing the two screen cages 2 to move closer to each other. The first scraper 4 contacts the screen cage 2 and gradually moves to the side of the screen cage 2 near the limiting spring 22. While the screen cage 2 moves, it also stretches the limiting spring 22. In order to reduce the situation where the support rod 613 hinders the movement of the mating plate 21 and the screen cage 2, grooves corresponding to the support rod 613 are provided on the side walls of the two mating plates 21 that are close to each other. When the two mating plates 21 move to contact, the support rod 613 is located in the groove of the mating plate 21. The groove is not shown in the figure.

[0050] As the water storage cylinder continues to move within the inlet pipe 11, the hinge rod 62 continues to move, driving the screen cage 2 to move as well. The movement of the screen cage 2 compresses the mating plate 21. When the water storage cylinder moves outside the inlet pipe 11, the drain hole is exposed outside the inlet pipe 11, and the water in the storage cylinder flows out quickly through the drain hole. The water flowing out of the storage cylinder falls onto the screen cage 2, where the screen cage 2 performs the first filtration. Large particles in the water remain on the upper surface of the screen cage 2, reducing the number of large particles entering the filter 3 and improving the service life of the filter 3. Then, the water flows into the filter 3, where the filter 3 performs the second filtration, and the filtered water falls to the bottom of the water tank 1.

[0051] As the water in the storage tank gradually decreases, the support spring 612 gradually returns to its original shape and pushes the support rod 613 and the storage tank upward. At the same time, the support rod 613 drives the hinge rod 62 to move upward. The hinge rod 62 moves and pushes the screen cage 2 away from the other screen cage 2. The mating plate 21 gradually returns to its original shape, and the limiting spring 22 also returns to its original shape and pulls the screen cage 2 to move. The first scraper 4 scrapes the large-diameter debris left on the screen cage 2 to the side of the screen cage 2 away from the limiting spring 22. When the support rod 613 and the storage tank return to their initial positions, the screen cage 2 also returns to its initial position. The first scraper 4 pushes the debris on the upper surface of the screen cage 2 into the collection box 5 for collection, reducing the adverse effect of debris accumulation on the screen cage 2 on the screening effect of the screen cage 2.

[0052] Reference Figure 1 and Figure 2Because the water in water tank 1 is left to stand for a long time, the fine impurities in the water are likely to settle on the bottom wall of water tank 1. These fine impurities will not affect the reuse of water, but when they settle at the bottom of water tank 1, they can easily form a film on the inner bottom wall of water tank 1, increasing the workload of operators in cleaning water tank 1. In order to reduce the formation of film at the bottom of water tank 1, a second scraper 7 is provided below each screen cage 2 in water tank 1. The lower surface of the second scraper 7 is in contact with the inner bottom wall of water tank 1. A transmission component 8 is provided between each second scraper 7 and the corresponding screen cage 2. The operation of the transmission component 8 transmits the power generated when the screen cage 2 moves to the second scraper 7, thereby driving the second scraper 7 to move.

[0053] The transmission assembly 8 includes two upper racks 81 fixedly connected to the lower surface of the screen cage 2. The two upper racks 81 are located on both sides of the screen cage 2, and the length direction of the upper racks 81 is set along the moving direction of the screen cage 2. The upper surface of the second scraper 7 is fixedly connected to a lower rack 82 that corresponds one-to-one with the upper racks 81. The length direction of the lower racks 82 is the same as that of the upper racks 81.

[0054] Reference Figure 1 and Figure 3 Several connecting blocks 83 are fixedly connected to the sidewalls of the two upper racks 81 that are far apart from each other, and several connecting blocks 83 are also fixedly connected to the sidewalls of the two lower racks 82 that are far apart from each other. In this embodiment, there are two connecting blocks 83 on both the upper racks 81 and the lower racks 82. A connecting groove 13 adapted to the connecting blocks 83 is opened on the inner sidewall of the water tank 1. Each connecting block 83 is slidably inserted into the corresponding connecting groove 13. The upper racks 81, the connecting blocks 83 and the connecting groove 13 cooperate to make the screen cage 2 slidably connected to the water tank 1.

[0055] The transmission assembly 8 also includes a gear 84 located between each upper rack 81 and the corresponding lower rack 82. The gear 84 meshes with the corresponding upper rack 81 and lower rack 82. A rotating shaft 85 is inserted and fixed on both gears 84. The length direction of the rotating shaft 85 is perpendicular to the moving direction of the screen cage 2. Both ends of the rotating shaft 85 are rotatably connected to the inner side wall of the water tank 1. The gear 84 is rotatably connected to the water tank 1 through the rotating shaft 85. A spiral stirring plate 86 is fixedly connected to the rotating shaft 85. The spiral stirring plate 86 is distributed along the axial direction of the rotating shaft 85.

[0056] When the screen cage 2 moves closer to the support rod 613, the screen cage 2 drives the upper rack 81 to move, the upper rack 81 drives the gear 84 and the rotating shaft 85 to rotate, and the rotating shaft 85 drives the spiral stirring plate 86 to rotate, thereby causing the spiral stirring plate 86 to stir the water in the water tank 1, so that the water in the water tank 1 can flow and reduce the occurrence of natural sedimentation of impurities in the water; the rotation of the gear 84 drives the lower rack 82 to move. At this time, the movement direction of the lower rack 82 is opposite to the movement direction of the upper rack 81. The movement of the lower rack 82 drives the corresponding second scraper 7 to move, thereby causing the second scraper 7 to scrape the inner bottom wall of the water tank 1, reducing the formation of a film on the inner bottom wall of the water tank 1, and reducing the workload of the operator in cleaning the water tank 1.

[0057] When the screen cage 2 moves away from the support rod 613, the screen cage 2 transmits power to the second scraper 7 in sequence through the upper rack 81, gear 84 and lower rack 82, thereby driving the second scraper 7 to move closer to the support rod 613. The second scraper 7 then scrapes the inner bottom wall of the water tank 1 again. In order to make the movement of the second scraper 7 smoother, a through hole is provided on the second scraper 7 to reduce the resistance encountered by the second scraper 7 during movement, thereby making the movement of the second scraper 7 smoother.

[0058] In other embodiments, the screen cage 2 may not be provided. The first rack is fixedly connected to the frame of the filter 3. The lower surface of the first scraper 4 is at the same horizontal height as the upper surface of the filter 3. The mating plate 21 is fixedly connected to the side wall of the filter 3 frame near another filter 3. The end of the hinge rod 62 away from the support rod 613 is also hinged to the lower surface of the filter 3 frame.

[0059] The implementation principle of a building energy-saving drainage system according to an embodiment of this application is as follows: Water enters the water storage tank. As the water in the water storage tank gradually increases, the water storage tank moves downward by pressing the support rod 613. At the same time, the support rod 613 drives the hinge rod 62 to move, causing the hinge rod 62 to pull the corresponding screen cage 2 to move. The movement of the screen cage 2 drives the rotating shaft 85 and the spiral stirring plate 86 to rotate, and also drives the second scraper 7 to move. The movement of the screen cage 2 also stretches the limit spring 22. When the water storage tank moves to outside the water inlet pipe 11, the water in the water storage tank flows out quickly and falls onto the screen cage 2. The screen cage 2 and the filter 3 filter the water in sequence.

[0060] As the water in the storage tank gradually decreases, the support spring 612 returns to its original shape and pushes the support rod 613 and the storage tank upward. At the same time, the hinge rod 62 rotates and pushes the screen cage 2 to move. The first screen plate pushes the debris on the screen cage 2 into the collection box 5. The movement of the screen cage 2 drives the rotating shaft 85 and the spiral stirring plate 86 to rotate, and also drives the second scraper 7 to move. The movement of the second scraper 7 scrapes the inner bottom wall of the water tank 1.

[0061] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A building energy-saving drainage system, comprising a water tank (1), an inlet pipe (11) fixedly connected to the water tank (1), and an outlet pipe (12), wherein two filters (3) are slidably connected in the water tank (1), and the two filters (3) slide along the line connecting them, characterized in that: The water tank (1) is fixedly connected with a first scraper (4) that corresponds to the filter (3) one by one. The lower surface of the first scraper (4) is flush with the upper surface of the corresponding filter (3). A collection box (5) is fixedly connected in the water tank (1). The collection box (5) is located below the two filters (3). Deformable mating plates (21) are fixedly connected to the side walls of the two filters (3) that are close to each other, and several limiting springs (22) are fixedly connected to the side walls of the two filters (3) that are far apart from each other. The limiting springs (22) are fixedly connected to the side walls of the water tank (1). A telescopic rod (61) is fixedly connected to the inner bottom wall of the water tank (1). The telescopic rod (61) is located between two filters (3). The telescopic end of the telescopic rod (61) faces upward. A hinge rod (62) is hinged to the filter (3). The end of the hinge rod (62) away from the filter (3) is hinged to the telescopic end of the telescopic rod (61). The drainage system also includes a drive (63) that moves the telescopic end of the telescopic rod (61).

2. The building energy-saving drainage system according to claim 1, characterized in that: The driving component (63) is a water storage cylinder that is slidably inserted into the water inlet pipe (11). The side wall of the water storage cylinder is in contact with the inner side wall of the water inlet pipe (11). A water leakage hole is provided on the side wall of the water storage cylinder. The end face of the water storage cylinder is connected to the telescopic end of the telescopic rod (61).

3. The building energy-saving drainage system according to claim 2, characterized in that: The telescopic rod (61) includes a sleeve (611) fixedly connected to the bottom wall of the water tank (1), a support rod (613) is slidably inserted into the sleeve (611), a support spring (612) is fixedly connected to the lower end of the support rod (613), the lower end of the support spring (612) is fixed to the bottom wall of the sleeve (611), a hinge rod (62) is hinged to the support rod (613), and a water storage cylinder is fixedly connected to the upper end of the support rod (613).

4. The building energy-saving drainage system according to claim 2, characterized in that: The bottom of the water tank (1) is provided with a second scraper (7), which contacts the inner bottom wall of the water tank (1). The water tank (1) is also provided with a transmission assembly (8) that transmits the force generated when the filter (3) moves to the second scraper (7).

5. A building energy-saving drainage system according to claim 4, characterized in that: The transmission assembly (8) includes an upper rack (81) and a lower rack (82) corresponding to the upper rack (81). The upper rack (81) and the lower rack (82) are slidably connected to the water tank (1). Each upper rack (81) is fixedly connected to the corresponding filter (3). Each lower rack (82) is fixedly connected to the corresponding second scraper (7). A gear (84) is provided between the upper rack (81) and the corresponding lower rack (82) to mesh with them. The gear (84) is rotatably connected to the water tank (1).

6. A building energy-saving drainage system according to claim 5, characterized in that: Both the upper rack (81) and the lower rack (82) are fixedly connected to a connecting block (83). The inner side wall of the water tank (1) is provided with a connecting groove (13) that is compatible with the connecting block (83). The length direction of the connecting groove (13) is set along the sliding direction of the filter (3). Each connecting block (83) is slidably inserted into the corresponding connecting groove (13).

7. A building energy-saving drainage system according to claim 5 or 6, characterized in that: A rotating shaft (85) coaxially arranged with the gear (84) is fixedly connected to the gear (84). The rotating shaft (85) passes through the gear (84) and is rotatably connected to the water tank (1).

8. A building energy-saving drainage system according to claim 7, characterized in that: A spiral stirring plate (86) is fixedly connected to the rotating shaft (85).

9. A building energy-saving drainage system according to claim 3, characterized in that: The sleeve (611) and the support rod (613) both have rectangular cross-sections.

10. A building energy-saving drainage system according to any one of claims 1 to 6, characterized in that: The filter (3) is covered with a sieve cage (2), and the two sieve cages (2) are open on the side that is close to each other. The mating plate (21) is inserted into the open part of the sieve cage (2).

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