Office building roof rainwater collection and purification ecological equipment

Abstract

The utility model provides office building roof rainwater collection and purification ecological equipment, and relates to the field of rainwater treatment. The system comprises a rainwater tank, a water collecting pipe and water storage tanks, the rainwater tank is located on the roof of the office building, the water storage tanks are distributed in the office building, and rainwater in the rainwater tank is conveyed to the water storage tanks through the water collecting pipe; a gate valve is arranged on the water collecting pipe, a filtering mechanism and a conveying pipe are arranged at the end, close to the water storage tank, of the water collecting pipe, the filtering mechanism comprises a filtering cylinder and a filtering plate arranged in the filtering cylinder, the filtering cylinder is connected with the water collecting pipe through a flange plate, and the filtering cylinder is connected with the upper portion of the conveying pipe through a flange plate. And the lower part of the conveying pipe is in threaded connection with the water storage tank. The device has the effect that the filtering mechanism can be quickly replaced.

Description

Technical Field

[0001] The present application relates to the field of rainwater treatment, and in particular to an ecological device for collecting and purifying rainwater on the roof of an office building. Background Art

[0002] Office buildings refer to buildings used by government agencies, groups, enterprises and institutions to handle administrative affairs and conduct various business activities. In order to improve the functionality of office buildings and achieve the goal of energy conservation and environmental protection, rainwater collection equipment is generally installed in office buildings, and the collected rainwater is used for greening, flushing toilets, etc. The collection, purification and reuse of rainwater is environmentally friendly and can also alleviate the pressure on tap water supply.

[0003] Existing rainwater collection equipment will filter the rainwater after collecting it, and the filtering mechanism used for filtering will become clogged after being used for a period of time, resulting in reduced filtering efficiency of rainwater. At this time, the filtering mechanism needs to be replaced, but the replacement operation of the filtering mechanism is relatively complicated and requires more manpower and material resources, which will have an adverse effect on the collection and purification efficiency of rainwater. Utility Model Content

[0004] In order to improve the problem of cumbersome operation of replacing the filter mechanism in the current rainwater collection equipment, the present application provides an ecological rainwater collection and purification device on the roof of an office building.

[0005] This application provides an ecological device for collecting and purifying rainwater on the roof of an office building, which adopts the following technical solution:

[0006] An ecological device for collecting and purifying rainwater on the roof of an office building, comprising a rain gutter, a water collecting pipe and a water storage tank, wherein the rain gutter is located on the roof of the office building, and a plurality of the water storage tanks are distributed in the office building; the water collecting pipe transports rainwater in the rain gutter toward the water storage tank; a gate valve is provided on the water collecting pipe, and a filtering mechanism and a delivery pipe are provided at one end of the water collecting pipe close to the water storage tank, wherein the filtering mechanism comprises a filter cartridge and a filter plate arranged in the filter cartridge, the filter cartridge and the water collecting pipe are connected via a flange as well as the filter cartridge and the upper part of the delivery pipe, and the lower part of the delivery pipe is connected to the water storage tank via a threaded connection.

[0007] By adopting the above technical solution, the rainwater trough and the water collecting pipe cooperate to collect rainwater, and the filtering mechanism filters and purifies rainwater. When the filtering mechanism needs to be replaced, close the valve, release the connection between the filter cartridge and the water collecting pipe and the connection between the filter cartridge and the delivery pipe, and then rotate the delivery pipe toward the inside of the water storage tank to increase the distance between the delivery pipe and the water collecting pipe, thereby realizing the rapid removal of the filter cartridge, and the reverse operation can realize the rapid installation of the new filter cartridge, effectively improving the efficiency of the filter cartridge disassembly and assembly.

[0008] Optionally, the filter cartridge includes a tubular shell, the top and the bottom of the shell are both adaptively screwed with a cover body, the cover body is provided with a through hole connected to the water collecting pipe and the delivery pipe; the flange includes a male piece and a female piece, the male piece is arranged on the outer wall of the cover body, the female piece is arranged on the outer wall of the water collecting pipe and the outer wall of the delivery pipe, the male piece is docked with the corresponding female piece and locked by bolts.

[0009] By adopting the above technical solution, the filter plate is arranged in the shell, and after the cover body is locked on the shell, the filter plate can be prevented from falling off from the shell, so that the filtering mechanism forms a whole; after the bolts are locked, the male piece and the female piece can be reliably locked, thereby realizing the reliable connection between the cover body located above and the water collecting pipe and the reliable connection between the cover body located below and the delivery pipe, and finally realizing the reliable installation of the filtering mechanism, thereby ensuring that the filtering mechanism can reliably filter rainwater.

[0010] Optionally, a plurality of pressing rods are provided on one side of the cover body facing the inside of the shell, a step hole is provided at both ends of the shell, a filter plate is correspondingly provided in a step hole, and the pressing rods press the filter plate.

[0011] By adopting the above technical solution, the filter plate located at the top is placed into the inner side of the shell through the step hole located at the top, and the filter plate located at the bottom is placed into the inner side of the shell through the step hole located at the bottom. After the cover body is tightened, the pressing rod on the cover body will press the filter plate, so that the two filter plates can be fixed in the corresponding step holes.

[0012] Optionally, the filtering accuracy of the filter plate located at the upper part of the filter cartridge is smaller than the filtering accuracy of the filter plate located at the lower part of the filter cartridge, a compression spring is provided between the two filter plates, and the pressure rod pushes the filter plate and compresses the compression spring.

[0013] By adopting the above technical solution, when the two covers are tightened and the positions of the two filter plates are fixed, the compression spring is in a compressed state; the inner diameter of the mesh on the upper filter plate is larger than the inner diameter of the mesh on the lower filter plate, thereby achieving a progressive filtering effect from top to bottom; when the upper cover is opened, the compression spring will push the upper filter plate out of the shell, thereby facilitating the replacement of the filter plate in the shell.

[0014] Optionally, the water tank is suspended by a bracket, a drain pipe is provided at the bottom of the water tank, the bottom of the drain pipe is flush with the bottom of the water tank, and the top of the drain pipe extends to the inner side of the water tank; a cart is provided under the water tank, a water distribution tank is provided on the cart, a water intake pipe is provided at the top of the water distribution tank, the water intake pipe is coaxially arranged with the drain pipe, and a drain pipe with a valve is passed through the outer wall of the water distribution tank.

[0015] By adopting the above technical solution, when the water intake pipe is inserted into the drainage pipe, the rainwater in the water storage tank will enter the water distribution tank, and then the water distribution tank will be pushed to the water supply position by a cart, so as to facilitate the flexible reuse of rainwater.

[0016] Optionally, a cover plate and a sealing plug are provided on the top of the drain pipe, the sealing plug is provided at the bottom of the cover plate, the sealing plug blocks the drain pipe, the outer diameter of the cover plate is larger than the outer diameter of the drain pipe, and a tension spring is provided between the bottom of the cover plate and the bottom of the water tank; a plurality of water holes are provided on the upper part of the water intake pipe, and a sealing ring is provided on the outer wall of the water intake pipe and below the water holes, and the outer wall of the sealing ring is in contact with the inner wall of the drain pipe.

[0017] By adopting the above technical solution, when the water intake pipe is not inserted into the drain pipe, under the pull of the tension spring, the cover plate is set on the end of the drain pipe and the sealing plug is inserted into the inner side of the drain pipe, which can prevent rainwater from flowing to the ground. When the water intake pipe is inserted into the drain pipe, the sealing plug will be pushed out of the drain pipe and the tension spring will be in an extended state. When the water permeable hole moves to the outside of the drain pipe, the rainwater in the water storage tank will enter the water intake pipe. The setting of the sealing ring can prevent rainwater from leaking between the inner wall of the drain pipe and the outer wall of the water intake pipe during the water intake process.

[0018] Optionally, a plurality of hydraulic rods are provided in the cart, and the plurality of hydraulic rods support the water distribution tank. A movable rod is passed through the side wall of the cart, and an inclined surface is provided at one end of the movable rod located on the inner side of the cart. A pressure block is provided at the bottom of the water distribution tank, and the pressure block is located above the inclined surface. The pressure block pushes the movable rod to move in a direction away from the cart.

[0019] By adopting the above technical solution, when there is no rainwater in the water distribution tank, the hydraulic rod will push the water distribution tank upward, so that the water intake pipe can be inserted into the drainage pipe to draw water. When rainwater is transferred into the water distribution tank, the water distribution tank will press the hydraulic rod downward. At the same time, the pressure block will push the movable rod to move, thereby displaying the water intake status in the water distribution tank, which is convenient for the staff to make quick judgments.

[0020] Optionally, a limiting hole is provided on the upper portion of the water distribution tank, an upper socket and a lower socket are provided on the side wall of the cart, the axis of the limiting hole and the axis of the upper socket are in the same plane, and the movable rod is inserted in the upper socket or the lower socket.

[0021] By adopting the above technical solution, when there is no rainwater in the water distribution tank, the movable rod is inserted into the lower socket to display the water level status. When the water distribution tank is filled with rainwater, the movable rod is pulled out and inserted into the upper socket and the limit hole to achieve the locking effect of the position of the water distribution tank.

[0022] Optionally, a universal wheel is provided at each corner of the bottom of the cart, and a push rod for pushing the cart to generate displacement is provided on the side wall of the cart.

[0023] By adopting the above technical solution, the movement of the cart and the water distribution tank can be achieved conveniently and labor-savingly.

[0024] In summary, this application has the following beneficial effects:

[0025] 1. Through the setting of the flange, the filter mechanism is reliably connected with the water collecting pipe and the water delivery pipe. Then, by rotating the water delivery pipe, the distance between the water delivery pipe and the water collecting pipe can be reliably adjusted, thereby reducing the difficulty of replacing the filter mechanism and realizing the rapid disassembly and assembly of the filter mechanism.

[0026] 2. Through the cooperation of the water intake pipe and the drainage pipe, the rainwater in the water storage tank is transferred to the water distribution tank, so that the collected and filtered rainwater can be quickly transported to the location where water is needed, realizing the reuse of collected rainwater. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is the assembly state reference diagram of this application;

[0028] Figure 2 It is a schematic diagram of the present application. Figure 1 ;

[0029] Figure 3 It is a reference diagram of the assembly state of the filter mechanism;

[0030] Figure 4 It is a reference diagram of the explosion state of the filter mechanism;

[0031] Figure 5 is a cross-sectional view of the internal structure of the present application;

[0032] Figure 6 yes Figure 5 The enlarged structure reference diagram at A in the middle;

[0033] Figure 7 is a schematic stereogram of a water intake pipe;

[0034] Figure 8 It is a schematic diagram of the present application. Figure 2 ;

[0035] In the figure: 1. Office building; 11. Rainwater gutter;

[0036] 2. Water collecting pipe; 21. Gate valve;

[0037] 3. Water storage tank; 31. Bracket; 32. Drain pipe; 321. Cover plate; 322. Sealing plug; 323. Tension spring;

[0038] 4. Filter mechanism; 41. Filter cartridge; 411. Shell; 4110. Step hole; 412. Cover; 4121. Through hole; 4122. Pressing rod; 413. Compression spring; 42. Filter plate; 43. Flange; 431. Male plate; 432. Female plate; 433. Bolt;

[0039] 5. Conveying pipe; 6. Trolley; 61. Hydraulic rod; 62. Movable rod; 620. Inclined surface; 63. Upper socket; 64. Lower socket; 65. Universal wheel; 66. Push rod;

[0040] 7. Water distribution tank; 71. Water intake pipe; 711. Water permeable hole; 712. Sealing ring; 72. Drain pipe; 720. Valve; 73. Pressure block; 74. Limit hole. DETAILED DESCRIPTION

[0041] The following is combined with Figure 1-8 This application is described in further detail.

[0042] Figure 1 is the assembly state reference diagram of this application, Figure 2 It is a schematic diagram of the present application. Figure 1 . See Figure 1 and Figure 2 , an office building rainwater collection and purification ecological equipment is arranged in the office building 1, including a rainwater gutter 11, a water collecting pipe 2 and a water storage tank 3. The rainwater gutter 11 is arranged on the top of the office building 1. When it rains, the rainwater will be collected in the rainwater gutter 11. The upper end of the water collecting pipe 2 is connected with the rainwater gutter 11 to collect the rainwater in the rainwater gutter 11. The lower end of the water collecting pipe 2 is provided with a filtering mechanism 4 and a conveying pipe 5. After the rainwater in the water collecting pipe 2 is filtered by the filtering mechanism 4, it will flow into the conveying pipe 5, and the conveying pipe 5 is connected with the water storage tank 3. Finally, the filtered rainwater will be collected in the water storage tank 3.

[0043] Figure 3 This is a reference diagram of the filter mechanism's assembly status. Figure 4 This is a reference diagram of the explosion state of the filter mechanism. Figure 3 and Figure 4 Combined with Figure 1The filter mechanism 4 includes a filter cartridge 41 and a filter plate 42 disposed in the filter cartridge 41. The filter cartridge 41 includes a housing 411 and a cover 412. The housing 411 is in a serially connected tubular shape. A cover 412 is screwed onto both ends of the housing 411. The cover 412 is provided with a through hole 4121. The cover 412 is connected to the water collecting pipe 2 via a flange 43, and the cover 412 is also connected to the delivery pipe 5 via a flange 43. The flange 43 includes a male piece 431 and a female piece 432. The male piece 431 is disposed on the outer wall of the cover 412, and the female piece 432 is disposed on the outer wall of the water collecting pipe 2 and the outer wall of the delivery pipe 5. The male piece 431 is butted with the corresponding female piece 432 and locked by bolts 433. When the bolt 433 is tightened, the shell 411 and the water collecting pipe 2 are reliably connected and communicated with each other, and the shell 411 and the delivery pipe 5 are reliably connected and communicated with each other. In this way, after rainwater flows into the shell 411, it will pass through the filter plate 42 to achieve a filtering effect, and then be discharged into the delivery pipe 5 and the water storage tank 3.

[0044] See also Figure 4 A step hole 4110 is provided on each end face of the shell 411, and the step hole 4110 extends along the axial direction of the shell 411. Moreover, a filter plate 42 is provided in each step hole 4110. Specifically, the filter plate 42 located at the top is placed into the shell 411 from top to bottom through a step hole 4110, and the filter plate 42 located at the bottom is placed into the shell 411 from bottom to top through another step hole 4110. A compression spring 413 is placed between the two filter plates 42. Furthermore, a plurality of pressure rods 4122 are provided on the side of the cover body 412 facing the inside of the shell 411. When the cover body 412 is screwed onto the shell 411, the pressure rods 4122 move toward the inside of the shell 411 while rotating. In this way, the pressure rods 4122 exert a pressure on the filter plate 42. On the one hand, the pressure rods 4122 prevent the filter plate 42 from shifting under the action of gravity. On the other hand, the pressure rods 4122 can reduce the distance between the two filter plates 42, thereby putting the compression spring 413 in a compressed state.

[0045] See also Figure 4 When the cover 412 is connected to the delivery pipe 5 and the cover 412 is connected to the water collecting pipe 2, the gate valve 21 on the water collecting pipe 2 is opened, and the rainwater will flow from the water collecting pipe 2 into the housing 411. After the rainwater passes through the two filter plates 42, the rainwater is filtered. In order to achieve a progressive filtering effect on rainwater, the filtering accuracy of the filter plate 42 located above is less than the filtering accuracy of the filter plate 42 located below, that is, the mesh inner diameter of the filter plate 42 located above is greater than the mesh inner diameter of the filter plate 42 located below. In this way, the filter plate 42 located above can filter larger impurities, while the filter plate 42 located below can filter smaller impurities, thereby improving the filtering effect and extending the service life of the filter plate 42.

[0046] See also Figure 3 and Figure 4 , when there are too many impurities trapped on the filter plate 42, close the gate valve 21 to stop the rainwater from being transported to the filter mechanism 4, then remove the bolts 433 on the flange 43, and then rotate the delivery pipe 5 toward the inside of the water storage tank 3 (the top of the water storage tank 3 and the lower part of the delivery pipe 5 are connected by threads), so that the distance between the delivery pipe 5 and the water collection pipe 2 will become larger, and the filter cartridge 41 can be removed, and then the new filter cartridge 41 is placed between the delivery pipe 5 and the water collection pipe 2, and re-locked, which is simple to operate and can achieve rapid replacement of the filter mechanism 4. After the old filter cartridge 41 is removed, first open the cover 412 located at the top, at this time, the pressing rod 4122 contacts the pressing action of the filter plate 42 located at the top, and the compression spring 413 releases energy and rebounds, which is convenient for taking out the filter plate 42 located at the top, and then open the cover 412 located at the bottom, and use gravity to quickly take out the filter plate 42 located at the bottom, so that it is convenient to clean the two filter plates 42 and the housing 411. Furthermore, the cover 412 at the bottom may be opened first, so that the filter plate 42 can be directly ejected from the housing 411 under the dual effects of its own gravity and the elastic force of the compression spring 413, thereby significantly improving the removal efficiency of the filter plate 42.

[0047] Figure 5 is a cross-sectional view of the internal structure of this application, Figure 6 yes Figure 5 The enlarged structure reference diagram at A in the middle. Figure 5 and Figure 6 A bracket 31 is provided at the bottom of the water tank 3, so that the water tank 3 is suspended in the air. In this way, the water distribution tank 7 can be pushed to the bottom of the water tank 3 under the push of the cart 6. A drain pipe 32 is provided at the bottom of the water tank 3, and the drain pipe 32 extends toward the inner side of the water tank 3 (that is, the bottom of the drain pipe 32 is flush with the bottom of the water tank 3), and a cover plate 321 and a sealing plug 322 are provided at one end of the drain pipe 32 located in the water tank 3, the cover plate 321 is pressed on the end surface of the drain pipe 32, and the sealing plug 322 is provided at the bottom of the cover plate 321, and the sealing plug 322 is coaxially arranged with the drain pipe 32 and can be inserted into the drain pipe 32, so as to achieve a sealing effect on the drain pipe 32, and the outer diameter of the cover plate 321 is larger than the outer diameter of the drain pipe 32, so that a tension spring 323 can be provided between the bottom of the cover plate 321 and the inner bottom of the water tank 3, under the action of the tension spring 323, the cover plate 321 is in a state of being in contact with the drain pipe 32 and the sealing plug 322 is inserted into the drain pipe 32, at this time, rainwater in the water tank 3 will not leak out through the drain tank. A plurality of hydraulic rods 61 are provided in the cart 6 , and a plurality of hydraulic cylinders are used to support the water distribution box 7 . A water intake pipe 71 is provided on the top of the water distribution box 7 , and a plurality of water permeable holes 711 are provided on the upper part of the drainage pipe 32 .

[0048] Figure 7is a schematic three-dimensional diagram of the water intake pipe. Figure 7 Combined with Figure 5 and Figure 6 When the cart 6 drives the water distribution tank 7 to move to the bottom of the water storage tank 3 and the water intake pipe 71 and the drain pipe 32 are in a coaxial state, the hydraulic rod 61 pushes the water distribution tank 7 upward, so that the water intake pipe 71 is inserted into the drain pipe 32. When the hydraulic rod 61 reaches the maximum stroke, the water intake pipe 71 pushes the sealing plug 322 out of the drain pipe 32, and the water permeable hole 711 is located outside the drain pipe 32. At this time, the rainwater in the water storage tank 3 will enter the water intake pipe 71 through the water permeable hole 711, and then flow into the water distribution tank 7 through the water intake pipe 71. A sealing ring 712 is provided on the outer wall of the water intake pipe 71 and below the water permeable hole 711. The outer wall of the sealing ring 712 is in a state of being in contact with the inner wall of the drain pipe 32, which can prevent the rainwater in the water storage tank 3 from seeping out through the gap between the water intake pipe 71 and the drain pipe 32.

[0049] Figure 8 It is a schematic diagram of the present application. Figure 2 . See Figure 8 Combined with Figure 5 As the rainwater continues to be discharged into the water distribution tank 7, the overall weight of the water distribution tank 7 will increase, and a downward pressure will be exerted on the hydraulic rod 61, so that the water distribution tank 7 will move downward. When the water distribution tank 7 moves downward to one end, the water permeable holes 711 will all move into the inner side of the drain pipe 32. At this time, the sealing plug 322 will also be re-inserted into the drain pipe 32, and the rainwater in the water storage tank 3 will not enter the water intake pipe 71, that is, the water intake is completed. A push rod 66 is provided on the side wall of the cart 6, and universal wheels 65 are provided at the bottom corners of the cart 6. At this time, the operator can easily push the cart 6 to push the water distribution tank 7 to the designated position. Since a drain pipe 72 with a valve 720 is provided on the outer wall of the water distribution tank 7, at this time, the valve 720 is opened to discharge the rainwater in the water distribution tank 7, so that the collected rainwater can be reused.

[0050] See also Figure 5Furthermore, an upper socket 63 and a lower socket 64 are provided on the side wall of the cart 6, and a limit hole 74 is provided on the upper part of the water distribution box 7, and the axis of the limit hole 74 is in the same plane as the axis of the upper socket 63. A pressing block 73 is provided at the bottom of the water distribution box 7, and a movable rod 62 is inserted into the lower socket 64. When the water intake pipe 71 is just connected with the drain pipe 32 and the water distribution box 7 is at the highest position, an inclined surface 620 is provided at one end of the movable rod 62 located on the inner side of the cart 6, and the inclined surface 620 is located below the pressing block 73, and the other end of the movable rod 62 is flush with the side wall of the cart 6. When the water distribution box 7 moves downward to the lowest position, the pressing block 73 will interfere with the inclined surface 620, so that the movable rod 62 moves toward the outside of the lower socket 64. A mark can be set on the movable rod 62. When the operator can see the mark, it indicates that the water distribution box 7 has reached the lowest position and water intake is completed. At this time, the limiting hole 74 is in a coaxial state with the upper plug hole 63, and the operator can pull out the movable rod 62 from the lower plug hole 64 and insert it into the upper plug hole 63 and the limiting hole 74, so as to fix the position of the water distribution tank 7 and ensure that the position of the water distribution tank 7 will not move during the process of draining the water from the water distribution tank 7. When the rainwater in the water distribution tank 7 is completely released, the cart 6 is pushed again to make the water intake pipe 71 and the drainage pipe 32 in a coaxial state, and then the movable rod 62 is pulled out. Under the pushing action of the hydraulic rod 61, the water distribution tank 7 can automatically move up and realize the docking of the water intake pipe 71 and the drainage pipe 32, so as to discharge the rainwater in the water storage tank 3 into the water distribution tank 7 again.

[0051] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An ecological device for collecting and purifying rainwater on the roof of an office building, characterized in that: It comprises a rainwater gutter (11), a water collecting pipe (2) and a water storage tank (3), wherein the rainwater gutter (11) is located on the top of an office building (1), a plurality of water storage tanks (3) are distributed in the office building (1), and the water collecting pipe (2) transports rainwater in the rainwater gutter (11) toward the water storage tank (3); The water collecting pipe (2) is provided with a gate valve (21), and one end of the water collecting pipe (2) close to the water storage tank (3) is provided with a filtering mechanism (4) and a delivery pipe (5), the filtering mechanism (4) comprises a filter cartridge (41) and a filter plate (42) arranged in the filter cartridge (41), the filter cartridge (41) and the water collecting pipe (2) and the filter cartridge (41) and the upper part of the delivery pipe (5) are connected via a flange (43), and the lower part of the delivery pipe (5) and the water storage tank (3) are connected via a thread.

2. The ecological equipment for collecting and purifying rainwater on the roof of an office building according to claim 1 is characterized in that: The filter cartridge (41) comprises a tubular shell (411), the top of the shell (411) and the bottom of the shell (411) are both screwed with a cover (412) in a suitable manner, and the cover (412) is provided with a through hole (4121) communicating with the water collecting pipe (2) and the delivery pipe (5); The flange (43) includes a male piece (431) and a female piece (432), wherein the male piece (431) is arranged on the outer wall of the cover body (412), and the female piece (432) is arranged on the outer wall of the water collecting pipe (2) and the outer wall of the conveying pipe (5), and the male piece (431) is butt-jointed with the corresponding female piece (432) and is locked by bolts (433).

3. The ecological equipment for collecting and purifying rainwater on the roof of an office building according to claim 2 is characterized in that: A plurality of pressing rods (4122) are provided on one side of the cover body (412) facing the inside of the shell (411), a step hole (4110) is provided at both ends of the shell (411), a filter plate (42) is correspondingly provided in each step hole (4110), and the pressing rods (4122) press the filter plate (42).

4. The ecological equipment for collecting and purifying rainwater on the roof of an office building according to claim 3 is characterized in that: The filtering accuracy of the filter plate (42) located at the upper part of the filter cartridge (41) is smaller than the filtering accuracy of the filter plate (42) located at the lower part of the filter cartridge (41), and a compression spring (413) is provided between the two filter plates (42), and the pressing rod (4122) pushes the filter plate (42) and compresses the compression spring (413).

5. The ecological equipment for collecting and purifying rainwater on the roof of an office building according to claim 3 is characterized in that: The water tank (3) is suspended in the air by a bracket (31), a drainage pipe (32) is provided at the bottom of the water tank (3), the bottom of the drainage pipe (32) is flush with the bottom of the water tank (3), and the top of the drainage pipe (32) extends to the inner side of the water tank (3); A trolley (6) is provided below the water storage tank (3), a water distribution tank (7) is provided on the trolley (6), a water intake pipe (71) is provided on the top of the water distribution tank (7), the water intake pipe (71) is coaxially arranged with the drainage pipe (32), and a water discharge pipe (72) with a valve (720) is passed through the outer wall of the water distribution tank (7).

6. The ecological equipment for collecting and purifying rainwater on the roof of an office building according to claim 5 is characterized in that: A cover plate (321) and a sealing plug (322) are provided on the top of the drain pipe (32); the sealing plug (322) is provided at the bottom of the cover plate (321); the sealing plug (322) blocks the drain pipe (32); the outer diameter of the cover plate (321) is larger than the outer diameter of the drain pipe (32); a tension spring (323) is provided between the bottom of the cover plate (321) and the bottom of the water storage tank (3); A plurality of water permeable holes (711) are provided on the upper portion of the water intake pipe (71), and a sealing ring (712) is provided on the outer wall of the water intake pipe (71) and below the water permeable holes (711), wherein the outer wall of the sealing ring (712) is in contact with the inner wall of the drainage pipe (32).

7. The ecological equipment for collecting and purifying rainwater on the roof of an office building according to claim 6 is characterized in that: A plurality of hydraulic rods (61) are arranged inside the trolley (6), and the plurality of hydraulic rods (61) support the water distribution tank (7). A movable rod (62) is passed through the side wall of the trolley (6), and an inclined surface (620) is arranged at one end of the movable rod (62) located inside the trolley (6). A pressure block (73) is arranged at the bottom of the water distribution tank (7), and the pressure block (73) is located above the inclined surface (620). The pressure block (73) pushes the movable rod (62) to move in a direction away from the trolley (6).

8. The ecological equipment for collecting and purifying rainwater on the roof of an office building according to claim 7 is characterized in that: The upper part of the water distribution box (7) is provided with a limiting hole (74), and the side wall of the cart (6) is provided with an upper plug hole (63) and a lower plug hole (64). The axis of the limiting hole (74) and the axis of the upper plug hole (63) are in the same plane, and the movable rod (62) is inserted into the upper plug hole (63) or the lower plug hole (64).

9. The ecological equipment for collecting and purifying rainwater on the roof of an office building according to claim 7, characterized in that: Universal wheels (65) are provided at four corners of the bottom of the cart (6), and a push rod (66) for pushing the cart (6) to generate displacement is provided on the side wall of the cart (6).

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