Energy-saving rainwater collecting and recycling water-harvesting building and construction method thereof

Abstract

This application relates to an energy-saving rainwater harvesting and recycling structure and its construction method. The structure includes a building and a collection tank. The building has windows and a drain pipe with a flow channel. An adjusting arm is rotatably connected to the drain pipe, and the adjusting arm has a second flow channel. The adjusting arm has an inlet and an outlet. A baffle is installed in the first flow channel. The collection tank has a controller and a connecting pipe, with a water pump connected to the connecting pipe. A sensor is installed on the adjusting arm, and a sensing element is installed on the drain pipe. Homeowners can collect rainwater from the falling rain or collected rainwater from the collection tank indoors, without needing to go outdoors. This makes it more convenient for homeowners to collect rainwater indoors. The collected rainwater can be used for washing items, flushing toilets, etc., achieving rainwater recycling, reducing tap water usage, helping to alleviate water shortages, and achieving energy conservation.

Description

Technical Field

[0001] This application relates to the field of building construction, and in particular to an energy-saving rainwater harvesting and recycling water-collecting building and its construction method. Background Technology

[0002] With the acceleration of urbanization, water shortage and energy consumption problems are becoming increasingly prominent. Traditional buildings mostly adopt direct discharge mode for rainwater management, resulting in a large amount of rainwater loss, which exacerbates urban flooding and insufficient groundwater replenishment. Therefore, the research and application of rooftop rainwater harvesting mechanisms are becoming more and more widespread, becoming an important part of green building and sustainable development concepts.

[0003] For example, Chinese invention patent CN120083266A discloses an outdoor roof rainwater collection mechanism, including a house, filter boxes symmetrically and fixedly connected to both sides of the house, filter plates fixedly connected to the side of the filter boxes closer to the house, a drain pipe fixedly connected to the bottom of the filter boxes, a connecting pipe fixedly connected to the lower part of the drain pipe, a collection box fixedly connected to the end of the connecting pipe away from the drain pipe, a liquid extraction pipe fixedly connected to the upper part of the collection box, a sealing cap threadedly connected to the upper part of the liquid extraction pipe, and an adjustment housing fixedly connected to both ends of the filter box. A second motor is installed inside the adjustment housing, and a worm gear is installed at the output end of the second motor. The worm gear is meshed with a worm wheel.

[0004] With the above-mentioned rooftop rainwater harvesting system, when homeowners want to use the rainwater collected in the collection tank while indoors, they need to go outside, open the sealed cover on the collection tank, and then take out the rainwater before they can use it. This is rather inconvenient and needs improvement. Summary of the Invention

[0005] To address the inconvenience of homeowners accessing rainwater collected in collection tanks indoors, this application provides an energy-saving, recyclable rainwater harvesting building and its construction method.

[0006] In the first aspect, this application provides an energy-saving rainwater harvesting and recycling water collection building, which adopts the following technical solution:

[0007] An energy-saving rainwater harvesting and recycling water collection building includes a building body and a collection tank. The building body has a window, the collection tank has a water storage chamber, and the building body has a drain pipe. The drain pipe has a first flow channel that connects to the water storage chamber. An adjusting arm is rotatably connected to the drain pipe. The window allows the adjusting arm to rotate and extend into it. The adjusting arm has a second flow channel and an inlet and an outlet that communicate with the second flow channel. The inlet is located inside the first flow channel, and a baffle is provided inside the first flow channel. The baffle covers the inlet. When the adjusting arm extends into the window, the inlet detaches from the baffle.

[0008] The collection box is equipped with a controller and a connecting pipe. The connecting pipe connects the water storage chamber and the second flow channel. A water pump is installed on the connecting pipe. The inlet and outlet of the water pump are connected to the connecting pipe. A sensor is installed on the adjusting arm. A sensing element is installed on the drain pipe. The sensor is used to sense the sensing element and output a control signal to the controller. The controller controls the water pump to start, so that the water pump draws the liquid in the water storage chamber into the second flow channel.

[0009] By adopting the above technical solution, when the homeowner wants to collect rainwater indoors, if it is raining, the adjusting arm can be rotated to extend into the window, allowing the rainwater to flow into the inlet and channel two of the drain pipe, and then out through the outlet. The homeowner can collect the rainwater discharged from the outlet for use, reducing the use of pumps and other driving components, thereby reducing energy consumption. If it is not raining, the adjusting arm can be rotated to activate the sensor, which then outputs a control signal to the controller. The controller then activates the pump, drawing the liquid from the storage chamber into channel two, allowing the homeowner to collect the rainwater indoors without having to go outside to collect it. This makes it more convenient for the homeowner to collect rainwater indoors. The collected rainwater can be used for washing items, flushing toilets, etc., achieving rainwater recycling, reducing the use of tap water, helping to alleviate water shortages, and achieving energy conservation.

[0010] Optionally, the adjusting arm includes a collar, an extension rod, and a splicing block. The drain pipe has an installation groove for the splicing block to be inserted into. The collar has a through hole through which the drain pipe passes. The collar has a threaded post. The collar and the threaded post are joined to form a clearance hole, which communicates with the through hole and allows the splicing block to be inserted into. The extension rod has a threaded groove for the splicing block to be inserted into and for the threaded post to be threadedly connected. When the threaded post is threaded into the threaded groove, the extension rod presses the splicing block against the end of the threaded post. The water inlet is located on the splicing block, and the water outlet is located on the extension rod. The second flow channel is formed by joining the splicing block and the extension rod.

[0011] By adopting the above technical solution, the adjusting arm and the drain pipe are separated, which reduces the space occupied during transportation and facilitates transportation. When installing the adjusting arm, the collar is placed on the outside of the drain pipe, and then the splicing block is inserted into the clearance hole and the mounting groove. Next, the extension rod is threaded to the threaded post, so that the extension rod presses the splicing block against the end of the threaded post, thus completing the installation of the adjusting arm on the drain pipe. No other tools or connecting accessories are required, and the operation is simple.

[0012] Optionally, the drain pipe is provided with a plurality of protrusions circumferentially, the protrusions circumferentially located below the collar, the protrusions circumferentially provided with elastic pieces, the elastic pieces being located between adjacent protrusions circumferentially and inclined downwards towards the adjacent protrusions circumferentially, the adjacent protrusions circumferentially and the drain pipe being spliced ​​to form a groove, the drain pipe being fitted with a connecting ring, the connecting ring being located between the collar and the protrusions circumferentially, the connecting ring being provided with a plurality of protrusions circumferentially, the protrusions circumferentially located within the groove, the collar being provided with a plurality of positioning grooves, the positioning grooves corresponding one-to-one with the protrusions circumferentially, the positioning grooves being for the protrusions circumferentially to engage.

[0013] By adopting the above technical solution, when the adjusting arm needs to be rotated, the connecting ring is moved down, and the second protrusion squeezes the elastic sheet, causing the elastic sheet to bend and deform towards the corresponding first protrusion. This allows the second protrusion to move down and disengage from the positioning groove, allowing the adjusting arm to rotate. When the adjusting arm rotates to the corresponding position and the positioning groove and the second protrusion are aligned, the second protrusion is released, and the elastic sheet resets, pushing the second protrusion into the corresponding positioning groove. The first protrusion abuts against the second protrusion to limit the connecting ring, preventing the connecting ring from rotating relative to the drain pipe. Therefore, the adjusting arm can be positioned by the second protrusion abutting against the inner wall of the positioning groove, reducing the possibility of the adjusting arm rotating under wind force, which could lead to the accidental start of the water pump. During installation, the connecting ring is simply placed on the outside of the drain pipe, making installation quick and convenient.

[0014] Optionally, the building body is provided with an eaves, and a water collection trough is provided on the eaves. The outer wall of the drain pipe is provided with several through holes that communicate with the flow channel. The through holes are located in the water collection trough. A filter cover is threadedly connected to the drain pipe. The filter cover is located in the water collection trough, and the upper end face of the filter cover is conical. The lower end of the filter cover is located below the through holes and abuts against the bottom wall of the water collection trough.

[0015] By adopting the above technical solution, on the one hand, when installing the drain pipe, the lower end of the filter cover can be abutted against the bottom wall of the water collection tank to limit the drain pipe, so as to facilitate the subsequent installation and fixation of the drain pipe. On the other hand, some rainwater flows into the drain pipe through the upper end of the drain pipe, and the rainwater located outside the drain pipe enters the drain pipe through the through hole to increase the water collection efficiency. At this time, the filter cover can filter the debris located above or around the drain pipe to reduce the situation of debris entering the water storage chamber.

[0016] Secondly, this application provides a construction method for an energy-saving rainwater harvesting and recycling water-collecting building, employing the following technical solution:

[0017] A construction method for the above-mentioned energy-saving rainwater harvesting and recycling water collection building includes the following steps:

[0018] S1. Construct the building structure;

[0019] S2. Install the drain pipe and adjusting arm;

[0020] S3. Fix the drain pipe to the exterior wall of the building;

[0021] S4. Connect the drain pipe and the collection box.

[0022] By adopting the above technical solution, a rainwater collection structure that facilitates rainwater collection by indoor personnel is formed.

[0023] Thirdly, this application provides a construction method for an energy-saving rainwater harvesting and recycling water-collecting building, employing the following technical solution:

[0024] A construction method for the above-mentioned energy-saving rainwater harvesting and recycling water collection building includes the following steps:

[0025] S1. Construct the building structure;

[0026] S2. Place the connecting ring and collar on the outside of the drain pipe one after the other, then insert the splicing block into the clearance hole and the installation groove, and then thread the extension rod onto the threaded post to complete the installation of the drain pipe and the adjusting arm.

[0027] S3. Fix the drain pipe to the exterior wall of the building;

[0028] S4. Connect the drain pipe and the collection box.

[0029] Fourthly, this application provides a construction method for an energy-saving, rainwater-harvesting, and recyclable water-collecting building, employing the following technical solution:

[0030] A construction method for the above-mentioned energy-saving rainwater harvesting and recycling water collection building includes the following steps:

[0031] S1. Construct the house body and eaves, and reserve holes on the eaves for installing drainage pipes;

[0032] S2. Install the drain pipe and adjusting arm;

[0033] S3. Insert the drain pipe through the reserved hole on the eaves, then thread the filter cover onto the drain pipe, limit the drain pipe by having the lower end of the filter cover abut against the bottom wall of the water collection tank, and then fix the drain pipe to the exterior wall of the building.

[0034] S4. Connect the drain pipe and the collection box.

[0035] In summary, this application includes at least one of the following beneficial technical effects:

[0036] Homeowners can access rainwater from indoors, either from falling rain or collected in collection tanks, without having to go outside to collect it. This makes it more convenient for homeowners to access rainwater while indoors. The collected rainwater can be used for washing items, flushing toilets, etc., achieving rainwater recycling, reducing the use of tap water, helping to alleviate water shortages, and achieving energy conservation.

[0037] The adjustable arm and drain pipe are separated, which reduces the space occupied during transportation and makes it easier to transport. When installing the adjustable arm, no other tools or connecting accessories are needed, making the operation simple.

[0038] By setting up a filter cover, the lower end of the filter cover abuts against the bottom wall of the water collection tank to limit the drain pipe, so as to facilitate the subsequent installation and fixing of the drain pipe. On the other hand, it can increase the water collection efficiency and reduce the amount of debris entering the water storage chamber. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of an embodiment of this application.

[0040] Figure 2 This is a cross-sectional view of the roof eaves, drain pipe, and filter cover of an embodiment of this application.

[0041] Figure 3 for Figure 2 The enlarged view of section A in the middle mainly shows the structure of the filter cover.

[0042] Figure 4 This is a partial cross-sectional view of an embodiment of this application, mainly showing the structure of the adjusting arm and the baffle.

[0043] Figure 5 This is a partial exploded structural diagram of an embodiment of this application, mainly showing the structure of the clearance hole and the positioning groove.

[0044] Figure 6 This is a partial structural diagram of an embodiment of this application, mainly showing the structure of the mounting groove.

[0045] Explanation of reference numerals in the attached drawings: 1. Body; 11. Window; 2. Collection box; 3. Eaves; 31. Water collection trough; 4. Drain pipe; 41. Flow channel one; 42. Through hole; 43. Mounting groove; 5. Filter cover; 51. Filter part; 511. Relief groove; 52. Connecting part; 6. Adjusting arm; 61. Collar; 611. Perforation; 612. Positioning groove; 62. Extension rod; 621. Threaded groove; 622. Water outlet; 63. Splicing block; 631. Water inlet; 7. Threaded column; 8. Relief hole; 9. Baffle; 10. Flow channel two; 12. Protrusion one; 13. Elastic sheet; 14. Slot; 15. Connecting ring; 16. Protrusion two; 17. Controller; 18. Connecting pipe; 19. Water pump; 20. Sensor; 21. Sensing element. Detailed Implementation

[0046] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0047] This application discloses an energy-saving, recyclable rainwater harvesting building. See also... Figure 1 and Figure 2 The energy-saving rainwater harvesting and recycling water collection building includes a building body 1 and a collection box 2. A window 11 is opened on the outer wall of the building body 1. An eave 3 is fixed on the outer wall of the building body 1. The eave 3 is located above the window 11. A water collection trough 31 is opened on the upper surface of the eave 3. The collection box 2 is located outside the building body 1 and below the window 11. A water storage cavity is opened inside the collection box 2.

[0048] See Figures 1-3 A drain pipe 4 is fixed to the body 1. The drain pipe 4 is located between the eaves 3 and the collection box 2. The upper end of the drain pipe 4 passes through the eaves 3 and extends into the water collection tank 31, and the lower end of the drain pipe 4 is fixedly connected to the collection box 2. A flow channel 41 is opened in the drain pipe 4, which connects to the water storage chamber. Several through holes 42, which communicate with the flow channel 41, are evenly spaced on the outer wall of the drain pipe 4. The through holes 42 are located in the water collection tank 31. A filter cover 5 is threaded onto the drain pipe 4. The filter cover 5 is located in the water collection tank 31 and is located in the water collection tank 2. Above the drain pipe 4, the filter cover 5 includes a filter part 51 and a connecting part 52. The upper end face of the filter part 51 is conical, and the lower end face of the filter part 51 is provided with a relief groove 511. The connecting part 52 is located in the relief groove 511 and is fixedly connected to the filter part 51. The connecting part 52 is annular, and a threaded surface is formed on the outer peripheral wall of the connecting part 52 so as to be threadedly connected to the flow channel 41. When the connecting part 52 is threadedly connected to the drain pipe 4, the lower end of the filter part 51 is located below the through hole 42 and abuts against the bottom wall of the water collection tank 31.

[0049] See Figures 1-6An adjusting arm 6 is rotatably connected to the drain pipe 4. A window 11 allows the adjusting arm 6 to rotate and extend into it. The adjusting arm 6 includes a collar 61, an extension rod 62, and a splicing block 63. A through hole 611 is provided on the collar 61 for the drain pipe 4 to pass through. When the drain pipe 4 passes through the through hole 611, the drain pipe 4 fits against the inner wall of the through hole 611. The collar 61 is rotatably connected to the drain pipe 4, and the axis of rotation of the collar 61 is vertical. A threaded post 7 is fixed on the collar 61, located on one side of the collar 61 along the horizontal direction. The collar 61 and the threaded post 7 are joined to form a clearance hole 8, which communicates with the through hole 611. 8. The splicing block 63 is inserted into the drain pipe 4. The outer wall of the drain pipe 4 is provided with an installation groove 43 for the splicing block 63 to be inserted into. The installation groove 43 is connected to the flow channel 41. The upper end face of the splicing block 63 is provided with a water inlet 631. A baffle 9 is also fixed on the drain pipe 4. The baffle 9 is located in the flow channel 41 and above the installation groove 43. When the splicing block 63 is inserted into the clearance hole 8 and the installation groove 43, the splicing block 63 slides and connects to the installation groove 43 along the rotation direction of the collar 61. The water inlet 631 is located in the flow channel 41. The baffle 9 covers the water inlet 631. When the adjusting arm 6 extends into the window 11, the water inlet 631 is disengaged from the baffle 9.

[0050] See Figures 1-6 The extension rod 62 is located on the side of the splicing block 63 away from the drain pipe 4. The extension rod 62 has a threaded groove 621 on the outer wall of the splicing block 63. The threaded groove 621 is for the splicing block 63 to be inserted and for the threaded post 7 to be threaded. When the threaded post 7 is threaded in the threaded groove 621, the extension rod 62 presses the splicing block 63 against the end of the threaded post 7. The splicing block 63 and the extension rod 62 are spliced ​​to form a flow channel 2 10. The outer wall of the extension rod 62 has a water outlet 622. The water outlet 622 is located below the extension rod 62, and both the water inlet 631 and the water outlet 622 are connected to the flow channel 2 10.

[0051] See Figures 1-6The outer wall of the drain pipe 4 is circumferentially fixed with several protrusions 12 at uniform intervals. The protrusions 12 are located below the collar 61. Each protrusion 12 has an elastic sheet 13 fixed on both sides. The elastic sheet 13 is located between adjacent protrusions 12 and is inclined downward towards the adjacent protrusions 12. Adjacent protrusions 12 and drain pipe 4 are spliced ​​to form a groove 14. A connecting ring 15 is sleeved on the drain pipe 4. The connecting ring 15 is located between the collar 61 and the protrusions 12. The connecting ring 15 is circumferentially fixed with several protrusions 2 16 at uniform intervals. The number and position of the protrusions 2 16 correspond one-to-one with the number and position of the grooves 14. Each protrusion 2 16 is located in the corresponding groove 14. The lower end face of the collar 61 is provided with several positioning grooves 612. The number and position of the positioning grooves 612 correspond one-to-one with the number and position of the protrusions 2 16. The positioning grooves 612 are for the protrusions 2 16 to be inserted. In this embodiment, the elastic sheet 13 is made of plastic and has elasticity.

[0052] In practical use, when it is necessary to rotate the collar 61, the connecting ring 15 is moved down, and the second protrusion 16 squeezes the elastic piece 13, causing the elastic piece 13 to bend and deform in the direction close to the corresponding first protrusion 12, so that the second protrusion 16 moves down and disengages from the positioning groove 612, and the collar 61 can be rotated. When the collar 61 rotates to the corresponding position and the positioning groove 612 and the second protrusion 16 are aligned, the second protrusion 16 is released, the elastic piece 13 resets and pushes the second protrusion 16 into the corresponding positioning groove 612. The first protrusion 12 abuts against the second protrusion 16 to limit the connecting ring 15 and prevent the connecting ring 15 from rotating relative to the drain pipe 4. Therefore, the collar 61 can be positioned by the second protrusion 16 abutting against the inner wall of the positioning groove 612.

[0053] See Figures 1-6 A controller 17 and a connecting pipe 18 are fixed on the outer wall of the collection box 2. The end of the connecting pipe 18 away from the collection box 2 is fixedly connected to the extension rod 62. The connecting pipe 18 connects the water storage chamber and the second flow channel 10. A water pump 19 is fixed on the connecting pipe 18. The inlet and outlet of the water pump 19 are both connected to the connecting pipe 18. A sensor 20 is fixed on the collar 61. A sensing element 21 is fixed on the drain pipe 4. The sensor 20 is used to sense the sensing element 21 and output a control signal to the controller 17. The controller 17 controls the water pump 19 to turn on, so that the water pump 19 draws the liquid in the water storage chamber into the second flow channel 10. In this embodiment, the sensor 20 is a displacement sensor and the sensing element 21 is an iron block.

[0054] The implementation principle of an energy-saving rainwater harvesting and recycling water collection building according to an embodiment of this application is as follows:

[0055] When the homeowner wants to collect the rainwater indoors, if it is raining at the time, the adjusting arm 6 can be rotated so that the adjusting arm 6 extends into the window 11. The rainwater entering the drain pipe 4 flows into the inlet 631 and the flow channel 10, and then is discharged through the outlet 622. The homeowner can collect the rainwater discharged from the outlet 622 for use, reducing the use of driving components such as the water pump 19, thereby reducing energy consumption.

[0056] If it is not raining at this time, the adjusting arm 6 can be rotated so that the sensor 20 senses the sensed element 21 and then outputs a control signal to the controller 17. The controller 17 controls the water pump 19 to start, so that the water pump 19 draws the liquid in the water storage chamber into the flow channel 2 10. This allows the homeowner to use the rainwater collected in the collection box 2 indoors without having to go outside to collect water. This makes it more convenient for the homeowner to collect rainwater indoors. The collected rainwater can be used for washing objects, flushing toilets, etc., realizing the recycling of rainwater, reducing the use of tap water, helping to alleviate the problem of water shortage, and achieving energy conservation.

[0057] This application also discloses a construction method for an energy-saving rainwater harvesting and recycling water collection building, including the following steps:

[0058] S1. Construct the house body 1 and the eaves 3, and reserve holes on the eaves 3 for installing the drainage pipe 4;

[0059] S2. Place the connecting ring 15 and the collar 61 on the outside of the drain pipe 4 one after the other, then insert the splicing block 63 into the clearance hole 8 and the mounting groove 43, and then thread the extension rod 62 onto the threaded post 7 to complete the installation of the drain pipe 4 and the adjusting arm 6.

[0060] S3. Insert the drain pipe 4 through the reserved hole on the eaves 3, then thread the filter cover 5 onto the drain pipe 4, limit the drain pipe 4 by the lower end of the filter cover 5 abutting against the bottom wall of the water collection tank 31, and then fix the drain pipe 4 to the outer wall of the house 1.

[0061] S4, connect drain pipe 4 and collection box 2.

[0062] 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. An energy-saving rainwater harvesting and recycling water collection building, comprising a building body (1) and a collection tank (2), wherein the building body (1) has a window (11), the collection tank (2) has a water storage chamber, the building body (1) has a drain pipe (4), the drain pipe (4) has a flow channel (41) connected to the water storage chamber, characterized in that: An adjusting arm (6) is rotatably connected to the drain pipe (4). The window (11) allows the adjusting arm (6) to rotate and extend into it. A second flow channel (10) is provided inside the adjusting arm (6). An inlet (631) and an outlet (622) communicating with the second flow channel (10) are provided on the adjusting arm (6). The inlet (631) is located inside the first flow channel (41). A baffle (9) is provided inside the first flow channel (41). The baffle (9) covers the inlet (631). When the adjusting arm (6) extends into the window (11), the inlet (631) disengages from the baffle (9). The collection box (2) is equipped with a controller (17) and a connecting pipe (18). The connecting pipe (18) connects the water storage chamber and the second flow channel (10). The connecting pipe (18) is equipped with a water pump (19). The inlet and outlet of the water pump (19) are connected to the connecting pipe (18). The adjusting arm (6) is equipped with a sensor (20). The drain pipe (4) is equipped with a sensing element (21). The sensor (20) is used to sense the sensing element (21) and output a control signal to the controller (17). The controller (17) controls the water pump (19) to turn on, so that the water pump (19) draws the liquid in the water storage chamber into the second flow channel (10).

2. The energy-saving rainwater harvesting and recyclable water collection building according to claim 1, characterized in that: The adjusting arm (6) includes a collar (61), an extension rod (62), and a splicing block (63). The drain pipe (4) has an installation groove (43) for the splicing block (63) to be inserted into. The collar (61) has a through hole (611) through which the drain pipe (4) passes. The collar (61) has a threaded post (7). The collar (61) and the threaded post (7) are joined to form a clearance hole (8). The clearance hole (8) communicates with the through hole (611) and allows the splicing block (63) to be inserted into it. The extension rod ( 62) has a threaded groove (621) for the splicing block (63) to be inserted and for the threaded post (7) to be threaded. When the threaded post (7) is threaded into the threaded groove (621), the extension rod (62) presses the splicing block (63) against the end of the threaded post (7). The inlet (631) is located on the splicing block (63), and the outlet (622) is located on the extension rod (62). The second flow channel (10) is formed by splicing the splicing block (63) and the extension rod (62).

3. The energy-saving rainwater harvesting and recyclable water collection building according to claim 2, characterized in that: The drain pipe (4) is provided with a plurality of protrusions (12) circumferentially. The protrusions (12) are located below the collar (61). Each protrusion (12) is provided with an elastic piece (13). The elastic piece (13) is located between adjacent protrusions (12) and is inclined downward toward the adjacent protrusions (12). Adjacent protrusions (12) and the drain pipe (4) are joined to form a groove (14). 4) A connecting ring (15) is fitted on the upper part. The connecting ring (15) is located between the collar (61) and the first protrusion (12). The connecting ring (15) is provided with several second protrusions (16) in the circumferential direction. The second protrusions (16) are located in the slot (14). Several positioning grooves (612) are opened on the collar (61). The positioning grooves (612) correspond one-to-one with the second protrusions (16). The positioning grooves (612) are used for the second protrusions (16) to be inserted.

4. The energy-saving rainwater harvesting and recyclable water collection building according to claim 1, characterized in that: The room body (1) is provided with an eaves (3), and a water collection trough (31) is provided on the eaves (3). The outer wall of the drain pipe (4) is provided with several through holes (42) that communicate with the flow channel (41) in the circumferential direction. The through holes (42) are located in the water collection trough (31). A filter cover (5) is threadedly connected to the drain pipe (4). The filter cover (5) is located in the water collection trough (31), and the upper end face of the filter cover (5) is conical. The lower end of the filter cover (5) is located below the through holes (42) and abuts against the bottom wall of the water collection trough (31).

5. A construction method for an energy-saving rainwater harvesting and recyclable water-collecting building as described in any one of claims 1-4, characterized in that, Includes the following steps: S1. Construct the building structure (1); S2. Install the drain pipe (4) and the adjusting arm (6); S3. Fix the drain pipe (4) to the outer wall of the building (1); S4. Connect the drain pipe (4) and the collection box (2).

6. A construction method for an energy-saving rainwater harvesting and recyclable water-collecting building as described in claim 3, characterized in that, Includes the following steps: S1. Construct the building structure (1); S2. Place the connecting ring (15) and the collar (61) on the outside of the drain pipe (4) one after another, then insert the splicing block (63) into the clearance hole (8) and the mounting groove (43), and then thread the extension rod (62) onto the threaded post (7) to complete the installation of the drain pipe (4) and the adjusting arm (6). S3. Fix the drain pipe (4) to the outer wall of the building (1); S4. Connect the drain pipe (4) and the collection box (2).

7. A construction method for an energy-saving rainwater harvesting and recyclable water collection building as described in claim 4, characterized in that, Includes the following steps: S1. Construct the house body (1) and eaves (3), and reserve holes for installing drainage pipes (4) on the eaves (3); S2. Install the drain pipe (4) and the adjusting arm (6); S3. Insert the drain pipe (4) through the reserved hole on the eaves (3), then thread the filter cover (5) onto the drain pipe (4), limit the drain pipe (4) by the lower end of the filter cover (5) against the bottom wall of the water collection tank (31), and then fix the drain pipe (4) to the outer wall of the house (1). S4. Connect the drain pipe (4) and the collection box (2).

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