Rainwater filtering and purifying device for building water supply and drainage

Abstract

The invention relates to the technical field of rainwater filtering and purifying devices, and discloses a rainwater filtering and purifying device for building water supply and drainage, the rainwater filtering and purifying device for building water supply and drainage comprises a drainage pipe assembly, and the two sides of the drainage pipe assembly are each fixedly provided with a cleaning cavity assembly. The cleaning cavity assemblies are arranged on the two sides of the drainage pipe assembly, and meanwhile, the drawable filter assemblies are arranged at the bottom ends of the drainage pipe assembly and the cleaning cavity assemblies, so that when the bottom end in the first pipe body is currently used for cleaning impurities filtered and separated from the surface of a filter screen, the filter assemblies are integrally pulled to the other side, and the impurities are removed; one filter screen moves to the lower part of the interior of the first pipe body, the used filter screen is pulled to the interior of the second pipe body on the other side, the used filter screen can flow to the surface of the turned filter screen for backwashing after being filtered by the side screen, and filtered impurities which are washed down can be directly discharged, so that the subsequent effective use of rainwater is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of rainwater filtering and purifying devices, in particular to a rainwater filtering and purifying device for building water supply and drainage. Background Art

[0002] In recent years, people have paid more and more attention to the utilization of rainwater as a natural water resource. The extensive utilization of rainwater resources is an effective measure to save water, reduce urban flood disasters, ease the burden on drainage pipes, reduce pollution load, and improve the water environment.

[0003] In existing buildings, rainwater is collected and discharged by installing drainage pipes connected to the top of the building, and the bottom of the drainage pipes are mostly directly connected to the sewer or rainwater collection device. However, there is no corresponding filtering and purification device for the collection of rainwater for primary treatment of rainwater. In this way, since rainwater flows in the open air, various impurities from the outside will flow downward with the flow of rainwater. Without corresponding filtering devices for treatment, subsequent rainwater collection devices or sewers will be blocked by debris, which will greatly affect the collection and use of rainwater. For this reason, we propose a rainwater filtering and purification device for building water supply and drainage. Summary of the Invention

[0004] The present invention provides a rainwater filtering and purification device for building water supply and drainage, which has the advantages of being able to separate and filter debris and be easy to clean and process, and solves the problems raised in the above-mentioned background technology.

[0005] The present invention provides the following technical solution: a rainwater filtering and purification device for building water supply and drainage, comprising a drain pipe assembly, wherein cleaning cavity assemblies are fixedly installed on both sides of the drain pipe assembly, a filtering assembly is movably installed at the bottom end of the drain pipe assembly and the cleaning cavity assembly, a locking and regulating assembly is movably installed inside the drain pipe assembly, and a closing assembly is movably installed inside the cleaning cavity assembly.

[0006] In a preferred embodiment, the drainage pipe assembly includes a first tube body, a first drainage groove and a supporting groove are respectively provided on both sides of the first tube body, a detachable side net is provided inside the first drainage groove, an inner slot is respectively provided on both sides of the first tube body, a limiting straight groove is respectively provided at both ends of the interior of the first tube body, and a limiting short rod is fixedly installed on both sides of the interior of the first tube body.

[0007] In a preferred embodiment, the first drainage trough and the supporting trough are opened up and down, with the first drainage trough on the top and the supporting trough on the bottom, and the side net in the first drainage trough is used to filter rainwater flowing to the side cleaning cavity assembly, and the inner slot is opened above the first drainage trough, and the limiting straight groove is opened transversely and perpendicularly to the supporting trough and passes through both sides of the first tube body, and the limiting short rod is located inside the first tube body and is fixed at the interval between the first drainage trough and the supporting trough.

[0008] In a preferred embodiment, the cleaning chamber assembly includes a second tube body, a second drainage groove is provided on one side of the second tube body, and an inner contraction groove is provided on the second tube body. The second drainage groove is located on the side that fits with the drainage pipe assembly and is provided through the first drainage groove. The inner contraction groove is located above the second drainage groove and is connected to the second tube body and is provided through the inner contraction groove. The closing assembly is movably provided in the inner contraction groove.

[0009] In a preferred embodiment, the filter assembly includes two outer frames, a handle is fixedly installed on one side of the two outer frames, a filter is fixedly installed in the middle of the outer frames, limiting straight rods are fixedly provided at both ends of the outer frames, and a first plug and a second plug are fixedly installed on the other side of the two outer frames.

[0010] In a preferred embodiment, the external dimensions of the outer frame are the same as the external dimensions of the first tube body and the same as the internal dimensions of the second tube body. The filter is installed at a position close to the lower surface in the vertical direction at the center of the outer frame. The limiting straight rod is movably engaged in the supporting groove. The first plug and the second plug are plug-matched. A short groove is provided inside the second plug. A protrusion is provided at the end of the first plug, and the protrusion and the short groove are adapted to be matched.

[0011] In a preferred embodiment, the locking and regulating assembly includes a straight plate, a plug plate is movably mounted on the top of the straight plate, a support plate is movably mounted on the end of the plug plate, short rods are fixedly mounted on the upper and lower surfaces of the plug plate, a spring is fixedly mounted on one side of the short rod, a water flow groove is provided in the middle of the straight plate, a socket is provided at the bottom of the straight plate, and a push plate is movably mounted on the bottom end of the straight plate.

[0012] In a preferred embodiment, the plug plate is movably inserted in the inner slot, the short rod and the spring are arranged inside the inner slot, one end of the spring is fixedly installed on the inner wall of the inner slot, the supporting plate is movably inserted in the second pipe body and the closed assembly, the bottom end of the supporting plate is provided with a one-way rotation blocking protrusion for limiting the upward one-way rotation of the supporting plate, the rotating end of the supporting plate is provided with a slope structure, the jack is movably arranged on the limiting short rod, the bottom end of the straight plate is not higher than the top end of the supporting groove, the bottom end of the push plate is arranged at a height between the upper and lower ends of the supporting groove, and the push plate is arranged to rotate in one direction.

[0013] In a preferred embodiment, the closed assembly comprises a sealing plate, a first long groove is formed above one side of the sealing plate, a second long groove is formed below one side of the sealing plate, and an extension plate and an impact plate are fixedly installed at the bottom end of the sealing plate.

[0014] In a preferred embodiment, the sealing plate is movably inserted in the inner slot, the height of the sealing plate is greater than the opening height of the second drainage groove, the opening height of the first long groove is greater than the thickness of the plug plate, the opening height of the second long groove is greater than or equal to the thickness of the plug plate, the side where the extension plate is located is arranged to extend inside the second pipe body, and the side where the impact plate is located is arranged to extend inside the first pipe body.

[0015] The present application has the following advantages:

[0016] 1. The rainwater filtering and purifying device for building water supply and drainage is characterized in that the cleaning cavity assembly is arranged on both sides of the drainage pipe assembly, the pullable filtering assembly is arranged at the bottom end of the drainage pipe assembly and the cleaning cavity assembly, the filtering assembly is pulled to the other side when the impurities on the surface of the filter screen in the first pipe body are cleaned, the other filter screen is moved to the lower part of the first pipe body, the used filter screen is pulled to the second pipe body on the other side, the upper and lower surfaces of the filter screen are switched by rotating the outer frame, the sealing plate is pushed upward by the outer frame during the rotation process, the sealing plate is locked by the locking and controlling assembly, the second drainage groove is opened, part of the rainwater in the first pipe body is filtered by the side screen and then flows to the surface of the turned filter screen for backwashing, and the filtered impurities are directly discharged without flowing into the subsequent sewer or rainwater collecting device, so that the subsequent effective use of rainwater is ensured.

[0017] 2. The rainwater filtering and purification device for building water supply and drainage can realize, by setting a supporting plate, that when the filter needs to be cleaned, the rotation of the filter assembly as a whole drives the sealing plate to move up and contract in the inner contraction groove, thereby opening the second drainage groove, so that the rainwater filtered by the side net flows to the surface of the flipped filter, and the impurities filtered and separated on the other side are washed. When the filter assembly is pushed laterally, the supporting plate can be driven to contract, so that the supporting plate that has been moved up and inserted in the second long groove is disengaged therefrom, and then, under the impact of the natural downward flow of rainwater, the sealing plate moves down to close the second drainage groove on this side. When the filter screen that has been flushed needs to be replaced, the filter assembly as a whole can be continuously moved to the other side, so that the insertion hole is disengaged from the restriction inside the limiting short rod, and then, under the continuous movement of the filter assembly, the straight plate as a whole rotates around one end of the plug plate, thereby ensuring the normal and effective movement of the filter assembly as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention;

[0020] Figure 3 This is a three-dimensional schematic diagram of the cleaning chamber assembly and its internal structure of the present invention;

[0021] Figure 4 For the present invention Figure 2 A in the middle is an enlarged structural diagram;

[0022] Figure 5 This is a schematic diagram of a three-dimensional cross-sectional structure of a drainage pipe assembly of the present invention;

[0023] Figure 6 This is a schematic diagram of the first three-dimensional structure of the locking and regulating component and the closing component of the present invention;

[0024] Figure 7 This is a schematic diagram of the second three-dimensional structure of the locking and regulating component and the closing component of the present invention;

[0025] Figure 8 This is a schematic diagram of the three-dimensional structure of the locking and regulating assembly of the present invention;

[0026] Figure 9 This is a schematic diagram of a first three-dimensional exploded structure of the filter assembly of the present invention;

[0027] Figure 10 This is a schematic diagram of the second three-dimensional exploded structure of the filter assembly of the present invention.

[0028] In the figure: 1. Drain pipe assembly; 11. First tube body; 12. First drainage groove; 13. Supporting groove; 14. Inner insertion slot; 15. Limiting straight groove; 16. Limiting short rod; 2. Cleaning chamber assembly; 21. Second tube body; 22. Second drainage groove; 23. Inward shrinkage groove; 3. Filter assembly; 31. Outer frame; 32. Handle; 33. Filter; 34. Limiting straight rod; 35. First plug; 36. Second plug; 4. Locking and regulating assembly; 41. Straight plate; 42. Insert plate; 43. Supporting plate; 44. Short rod; 45. Spring; 46. Water flow groove; 47. Socket; 48. Push plate; 5. Closing assembly; 51. Closing plate; 52. First long groove; 53. Second long groove; 54. Extension plate; 55. Impact plate. DETAILED DESCRIPTION

[0029] The technical solutions of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. In addition, the forms of the various structures described in the following embodiments are merely examples. The rainwater filtering and purification device for building water supply and drainage involved in the present invention is not limited to the various structures described in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] See also Figures 1-2 A rainwater filtering and purification device for building water supply and drainage includes a drain pipe assembly 1, cleaning chamber assemblies 2 are fixedly installed on both sides of the drain pipe assembly 1, a filter assembly 3 is movably installed at the bottom ends of the drain pipe assembly 1 and the cleaning chamber assembly 2, a locking and regulating assembly 4 is movably installed inside the drain pipe assembly 1, and a sealing assembly 5 is movably installed inside the cleaning chamber assembly 2;

[0031] The filter assembly 33 of the embodiment of the present invention is a kind of filter assembly 30 of the embodiment of the present invention, and the filter assembly 3 of the embodiment of the present invention is a kind of filter assembly 30 of the embodiment of the present invention. The subsequent effective use of rainwater, at the same time, by setting the supporting plate 43, it can be achieved that when the filter screen 33 needs to be cleaned, the overall rotation of the filter assembly 3 drives the sealing plate 51 to move up and shrink in the inner shrinkage groove 23, thereby opening the second drainage groove 22, so that the rainwater filtered by the side net flows to the surface of the flipped filter screen 33, and the impurities filtered and separated on the other side are flushed. When the filter assembly 3 is pushed horizontally, the supporting plate 43 can be driven to shrink, thereby causing the supporting plate 43 that has been moved up and inserted into the second long groove 53 to be disengaged from it, and then under the impact of the natural downward flow of rainwater, the sealing plate 51 moves down to close the second drainage groove 22 on this side. When the filter screen 33 that has been flushed needs to be replaced, the filter assembly 3 can be continuously moved to the other side as a whole, thereby causing the socket 47 to break away from the restriction inside the limiting short rod 16, and then under the continuous movement of the filter assembly 3, the straight plate 41 as a whole rotates around one end of the plug plate 42, thereby ensuring the normal and effective movement of the filter assembly 3 as a whole.

[0032] See also Figures 1-5 A rainwater filtering and purification device for building water supply and drainage includes a drainage pipe assembly 1, which includes a first pipe body 11. A first drainage groove 12 and a supporting groove 13 are respectively formed on both sides of the first pipe body 11. A detachable side net is provided inside the first drainage groove 12. An inner slot 14 is respectively formed on both sides of the first pipe body 11. A limiting straight groove 15 is respectively formed at both ends of the interior of the first pipe body 11. A limiting short rod 16 is fixedly installed on both sides of the interior of the first pipe body 11.

[0033] In this embodiment, it should be noted that the first drainage trough 12 and the supporting groove 13 are opened up and down, with the first drainage trough 12 on the top and the supporting groove 13 on the bottom. The side net in the first drainage trough 12 is used to filter rainwater flowing into the side cleaning cavity assembly 2. The inner slot 14 is opened above the first drainage trough 12, and the limiting straight groove 15 is opened horizontally and perpendicularly to the supporting groove 13 and passes through both sides of the first tube body 11. The limiting short rod 16 is located inside the first tube body 11 and is fixed at the interval between the first drainage trough 12 and the supporting groove 13. In this way, when rainwater flows in the first tube body 11, it can flow out from the first drainage trough 12 on the side under the control and adjustment of the locking and regulating assembly 4 and the closing assembly 5, so that the rainwater can flow into the cleaning cavity assembly 2 through the filtration of the side net, and then backwash the filter assembly 3 that needs to be flushed, to ensure the continuous circulation of the device.

[0034] See also Figures 1-4 A rainwater filtering and purification device for building water supply and drainage includes a cleaning chamber assembly 2, the cleaning chamber assembly 2 includes a second tube body 21, a second drainage groove 22 is opened on one side of the second tube body 21, and an inner shrinkage groove 23 is opened on the second tube body 21;

[0035] In this embodiment, it should be noted that the second drainage groove 22 is located on the side that is in contact with the drainage pipe assembly 1, and is opened through the first drainage groove 12. The inner contraction groove 23 is located above the second drainage groove 22 and is connected with the second tube body 21 and is opened through. The closing assembly 5 is movably arranged in the inner contraction groove 23. In this way, the closing assembly 5 can be moved in the inner contraction groove 23 to realize the contraction and hiding of part of the structure of the closing assembly 5, or discharge it when needed, thereby ensuring flexible control of the water flow passing through the side of the drainage pipe assembly 1 and ensuring the rainwater collection effect.

[0036] See also Figure 1 、 Figure 9 and Figure 10 A rainwater filtering and purification device for building water supply and drainage includes a filter assembly 3, which includes two outer frames 31. A handle 32 is fixedly installed on one side of the two outer frames 31, a filter screen 33 is fixedly installed in the middle of the outer frames 31, and limiting straight rods 34 are fixedly provided at both ends of the outer frames 31. A first plug 35 and a second plug 36 are fixedly installed on the other side of the two outer frames 31;

[0037] In this embodiment, it should be noted that the external dimensions of the outer frame 31 are the same as the external dimensions of the first tube body 11 and the same as the internal dimensions of the second tube body 21. The filter screen 33 is installed at the center of the outer frame 31 at a position close to the lower surface in the vertical direction. The limiting straight rod 34 is movably engaged in the supporting groove 13. The first plug 35 and the second plug 36 are plug-in matching settings. A short groove is provided inside the second plug 36, and a protrusion is provided at the end of the first plug 35. The protrusion and the short groove are adapted to be adapted. In this way, by using two filter screens 33, it can be achieved that while one of them is being cleaned of impurities, the other can replace the other to filter and separate impurities in the rainwater. The two outer frames 31 are rotated with each other, so that when one outer frame 31 rotates, it can drive the closing component 5 to move, thereby opening the rainwater flow channel on that side, ensuring that rainwater can automatically flush the filter screen 33 on that side, reflecting the applicability of the device.

[0038] See also Figures 1-7 A rainwater filtering and purification device for building water supply and drainage includes a locking and regulating assembly 4, which includes a straight plate 41. A plug plate 42 is movably mounted on the top of the straight plate 41, and a supporting plate 43 is movably mounted on the end of the plug plate 42. Short rods 44 are fixedly mounted on the upper and lower surfaces of the plug plate 42, and a spring 45 is fixedly mounted on one side of the short rod 44. A water flow groove 46 is opened in the middle of the straight plate 41, a socket 47 is opened at the bottom of the straight plate 41, and a push plate 48 is movably mounted on the bottom end of the straight plate 41;

[0039] In this embodiment, it should be noted that the plug plate 42 is movably inserted into the inner slot 14, the short rod 44 and the spring 45 are both located inside the inner slot 14, and one end of the spring 45 is fixedly installed with the inner wall of the inner slot 14, the supporting plate 43 passes through the second tube body 21 and is inserted into the closing component 5, and the bottom end of the supporting plate 43 is provided with a one-way rotation blocking protrusion for limiting the supporting plate 43 to only rotate in one direction upward, and the lower part of the rotating end of the supporting plate 43 is provided with an inclined structure, the socket 47 is movably sleeved on the limiting short rod 16, the bottom end of the straight plate 41 does not exceed the height of the top of the supporting slot 13, and the bottom end of the push plate 48 is located at the height between the upper and lower ends of the supporting slot 13. The push plate 48 is set to a one-way rotation setting, so that the one-way rotation of the push plate 48 can be used to achieve no obstruction during the movement of the outer frame 31, and the socket setting of the socket 47 can ensure that when the outer frame 31 moves to the other side, it can first drive the locking and regulating assembly 4 to move horizontally as a whole. When the socket 47 is free from the restriction of the limiting short rod 16, it can push the straight plate 41 as a whole to rotate around the upper plug plate 42, thereby ensuring the normal passage of the entire filter assembly 3, and the top support plate 43 can support the closing assembly 5, thereby ensuring that the closing assembly 5 can freely switch between the open and closed states and maintain the current state, thereby ensuring the applicability of the structure.

[0040] Please refer to Figures 1-7 The utility model provides a rainwater filtering and purifying device for building water supply and drainage, including closed component 5, closed component 5 includes the sealing plate 51, the first long slot 52 is set up on the side of sealing plate 51 top, the second long slot 53 is set up on the side of sealing plate 51 bottom, and the extension plate 54 and the impact plate 55 are fixedly installed respectively at the bottom of the both sides of sealing plate 51,

[0041] In this embodiment, it should be noted that the sealing plate 51 is movably inserted in the inner recessed groove 23, the height of the sealing plate 51 is greater than the opening height of the second drain groove 22, the opening height of the first long slot 52 is greater than the thickness of the plug-in plate 42, the opening height of the second long slot 53 is greater than or equal to the thickness of the plug-in plate 42, the side where the extension plate 54 is located is extended inside the second pipe body 21, and the side where the impact plate 55 is located is extended inside the first pipe body 11. In this way, the rotation of the outer frame 31 can be used to abut against the extension plate 54, thereby moving the sealing plate 51 upward, opening the channel where the first drain groove 12 and the second drain groove 22 are located, so that rainwater can flow from there into the second pipe body 21 on the side, and after moving, the second long slot 53 is sleeved on the supporting plate 43, thereby ensuring the open state of the sealing plate 51. After the filter screen 33 is washed, the filter screen 33 is moved in the opposite direction, which can drive the locking and control assembly 4 to move horizontally as a whole. In this way, the supporting plate 43 can be separated from the second long slot 53, and under the flow and impact of rainwater in the first pipe body 11, the sealing plate 51 can be quickly moved downward to close the channel, thereby ensuring the linkage of the entire device.

[0042] Working principle, rainwater flows downward through the first pipe body 11, and the filter screen 33 inside the first pipe body 11 filters impurities. When the filtered impurities accumulate too much and need to be cleaned, pull the filter screen 33 to move to the other side and insert it into the bottom end of the corresponding second pipe body 21, then rotate the outer frame 31 below the second pipe body 21 to make the filter screen 33 flip. In the process of rotating the outer frame 31, the extension plate 54 is pushed upward, thereby making the sealing plate 51 shrink into the inner recessed groove 23, and at the end of the shrinkage stage, the supporting plate 43 is inserted into the second long slot 53 to form support for the sealing plate 51, ensuring that the first drain groove 12 and the second drain groove 22 are open. After the rainwater is filtered by the side screen, it flows to the surface of the filter screen 33 inside the second pipe body 21 on the side, achieving the washing of the filter screen 33. When it needs to be replaced again, the previously flipped filter screen 33 is flipped back, and then moved to the other side to replace the filter. The above steps can be repeated.

[0043] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A rainwater filtering and purification device for building water supply and drainage, comprising a drainage pipe assembly (1), characterized in that: Cleaning chamber assemblies (2) are fixedly mounted on both sides of the drain pipe assembly (1), filtering assemblies (3) are movably mounted on the bottom ends of the drain pipe assembly (1) and the cleaning chamber assembly (2), a locking and regulating assembly (4) is movably mounted inside the drain pipe assembly (1), and a sealing assembly (5) is movably mounted inside the cleaning chamber assembly (2).

2. A rainwater filtering and purification device for building water supply and drainage according to claim 1, characterized in that: The drainage pipe assembly (1) comprises a first pipe body (11), wherein a first drainage groove (12) and a supporting groove (13) are respectively provided on both sides of the first pipe body (11), a detachable side net is provided inside the first drainage groove (12), an inner slot (14) is respectively provided on both sides of the first pipe body (11), a limiting straight groove (15) is respectively provided at both ends of the interior of the first pipe body (11), and a limiting short rod (16) is respectively fixedly installed on both sides of the interior of the first pipe body (11).

3. A rainwater filtering and purification device for building water supply and drainage according to claim 2, characterized in that: The first drainage trough (12) and the supporting trough (13) are arranged in an upper and lower manner, with the first drainage trough (12) on the upper side and the supporting trough (13) on the lower side. The side net in the first drainage trough (12) is used to filter rainwater flowing to the side of the cleaning cavity assembly (2). The inner slot (14) is opened above the first drainage trough (12). The limiting straight groove (15) is opened transversely and perpendicularly to the supporting trough (13) and passes through both sides of the first tube body (11). The limiting short rod (16) is located inside the first tube body (11) and is fixedly arranged at the interval between the first drainage trough (12) and the supporting trough (13).

4. A rainwater filtering and purification device for building water supply and drainage according to claim 1, characterized in that: The cleaning chamber assembly (2) includes a second tube body (21), a second drainage groove (22) is provided on one side of the second tube body (21), and an inner shrinkage groove (23) is provided on the second tube body (21). The second drainage groove (22) is located on the side that is in contact with the drainage pipe assembly (1) and is provided through the first drainage groove (12). The inner shrinkage groove (23) is located above the second drainage groove (22) and is connected to the second tube body (21) and is provided through the inner shrinkage groove (23). The closing assembly (5) is movably provided in the inner shrinkage groove (23).

5. The rainwater filtering and purification device for building water supply and drainage according to claim 1, characterized in that: The filter assembly (3) comprises two outer frames (31), a handle (32) is fixedly mounted on one side of the two outer frames (31), a filter screen (33) is fixedly mounted in the middle of the outer frames (31), limiting straight rods (34) are fixedly mounted at both ends of the outer frames (31), and a first plug (35) and a second plug (36) are fixedly mounted on the other side of the two outer frames (31).

6. A rainwater filtering and purification device for building water supply and drainage according to claim 5, characterized in that: The outer dimensions of the outer frame (31) are the same as the outer dimensions of the first tube body (11) and the same as the inner dimensions of the second tube body (21). The filter screen (33) is installed at the center of the outer frame (31) at a position close to the lower surface in the vertical direction. The limiting straight rod (34) is movably connected to the supporting groove (13). The first plug (35) and the second plug (36) are plug-matched. A short groove is provided inside the second plug (36). A protrusion is provided at the end of the first plug (35), and the protrusion is adapted to fit the short groove.

7. The rainwater filtering and purification device for building water supply and drainage according to claim 1, characterized in that: The locking and regulating assembly (4) comprises a straight plate (41), a plug plate (42) is movably mounted on the top of the straight plate (41), a supporting plate (43) is movably mounted on the end of the plug plate (42), short rods (44) are fixedly mounted on the upper and lower surfaces of the plug plate (42), a spring (45) is fixedly mounted on one side of the short rod (44), a water flow trough (46) is provided in the middle of the straight plate (41), a socket (47) is provided at the bottom of the straight plate (41), and a push plate (48) is movably mounted on the bottom end of the straight plate (41).

8. A rainwater filtering and purification device for building water supply and drainage according to claim 7, characterized in that: The inserting plate (42) is movably inserted into the inner slot (14), the short rod (44) and the spring (45) are both located in the inner slot (14), and one end of the spring (45) is fixedly mounted on the inner wall of the inner slot (14). The supporting plate (43) passes through the second tube (21) and is inserted into the closing component (5). The bottom end of the supporting plate (43) is provided with a one-way rotation blocking protrusion for limiting the supporting plate (43) to only rotate in one direction upward. The lower part of the rotating end of the supporting plate (43) is provided with an inclined structure. The socket (47) is movably sleeved on the limiting short rod (16). The bottom end of the straight plate (41) does not exceed the height of the top end of the supporting slot (13). The bottom end of the push plate (48) is located at the height between the upper and lower ends of the supporting slot (13), and the push plate (48) is a one-way rotation setting.

9. The rainwater filtering and purification device for building water supply and drainage according to claim 1, characterized in that: The sealing assembly (5) comprises a sealing plate (51), a first long groove (52) is provided on the upper side of one side of the sealing plate (51), a second long groove (53) is provided on the lower side of one side of the sealing plate (51), and an extension plate (54) and an impact plate (55) are fixedly mounted on both sides of the bottom end of the sealing plate (51), respectively.

10. A rainwater filtering and purification device for building water supply and drainage according to claim 9, characterized in that: The sealing plate (51) is movably inserted in the shrinking groove (23), the height of the sealing plate (51) is greater than the opening height of the second drainage groove (22), the opening height of the first long groove (52) is greater than the thickness of the plug plate (42), and the opening height of the second long groove (53) is greater than or equal to the thickness of the plug plate (42). One side of the extension plate (54) is located inside the second tube body (21) and is extended, and one side of the impact plate (55) is located inside the first tube body (11) and is extended.

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