Building energy comprehensive utilization system based on rainwater power generation and control method thereof

Abstract

The invention discloses a building energy comprehensive utilization system based on rainwater power generation and a control method thereof, and belongs to the technical field of rainwater energy systems, the system comprises a pipeline main body, the pipeline main body comprises a drainage unit and a bypass unit, and the bypass unit is provided with a power generation unit; the pipeline main body is provided with a manhole group and a gate valve group, the drainage unit comprises a rainwater drainage pipe main pipeline, the bypass unit comprises a rainwater drainage bypass pipeline, and the power generation unit can generate power based on water potential energy; when the water flow is not greater than the critical flow of the bypass unit, the water is discharged after passing through the bypass unit; and when the pressure is larger than or the bypass unit is closed, water is drained through the rainwater drainage pipe main pipeline. The building space layout is optimized, potential energy driven power generation is achieved by transforming an original rainwater drainage pipeline of a building, generated electric energy can be absorbed by loads after voltage stabilization, when the system breaks down, maintenance is convenient, and normal drainage of the system can be guaranteed while maintenance is conducted through control of an access hole and a gate valve.

Description

Technical Field

[0001] The present invention belongs to the technical field of rainwater energy systems, and in particular relates to a building energy comprehensive utilization system based on rainwater power generation and a control method thereof. Background Art

[0002] In order to cope with the energy crisis and environmental challenges, the building energy comprehensive utilization system came into being. The building energy comprehensive utilization system breaks the traditional single energy utilization mode, and realizes the cascade utilization and efficient conversion of energy by integrating renewable energy, thereby reducing the building's dependence on traditional energy, reducing carbon emissions, and thus improving environmental protection and resource utilization.

[0003] As a widely existing and renewable natural resource, rainwater has attracted more and more attention for its potential energy value. When rainwater falls from a high altitude, it has a certain gravitational potential energy. It can be collected through a specific collection device and guided to impact the turbine to achieve the conversion of mechanical energy into electrical energy. Therefore, the rainwater power generation system can be used as one of the key components of the building energy comprehensive utilization system to provide clean energy supply.

[0004] However, the existing rainwater power generation technology mainly sets diversion ports and filtering devices on the edge of the building roof to collect rainwater into a water tank. When the water level reaches a certain level, the valve is opened to allow rainwater to fall from a high place and impact the turbine at the bottom to generate electricity. As for the current rainwater power generation system, a certain amount of potential energy will be lost by collecting rainwater into a water tank and then generating electricity. The efficiency of rainwater power generation is low, and the water tank will occupy a certain space, which is not conducive to the layout of the building environment. Summary of the invention

[0005] The present invention provides a building energy comprehensive utilization system based on rainwater power generation and a control method thereof, aiming to solve the problems of the current rainwater power generation system, in which a certain potential energy will be lost by collecting rainwater into a water storage tank for subsequent power generation, the efficiency of rainwater power generation is low, and the water storage tank will occupy a certain space, which is not conducive to the layout of the building environment.

[0006] In order to achieve the above object, the present invention adopts the following technical scheme: The present invention provides a building energy comprehensive utilization system based on rainwater power generation, comprising a pipeline main body, the pipeline main body comprising a drainage unit and a bypass unit, the bypass unit is equipped with a power generation unit; the pipeline main body is provided with an inspection hole group and a gate valve group to control and maintain the pipeline main body; wherein: The drainage unit includes a main rainwater drainage pipe, and the bypass unit includes a rainwater drainage bypass pipe; The main pipeline of the rainwater drainage pipe has an inlet pipe section and a drainage pipe section; the main pipeline of the rainwater drainage pipe and the rainwater drainage bypass pipe are both connected to the inlet pipe section, and the outlet end of the rainwater drainage bypass pipe is connected to the drainage pipe section; at the same time, the power generation unit can generate electricity based on water potential energy; When the water flow rate is not greater than the critical flow rate of the bypass unit, the water enters the water inlet pipe section, passes through the bypass unit, and is discharged along the drainage pipe section; when the water flow rate is greater than the critical flow rate of the bypass unit or the bypass unit is closed, the water enters the water inlet pipe section, passes through the main pipeline of the rainwater drainage pipe, and is discharged along the drainage pipe section.

[0007] In some embodiments, the water outlet of the water inlet pipe section is connected to the water inlet of the rainwater drainage bypass pipe; the rainwater drainage bypass pipe has at least a portion of the first transverse straight pipe at its water inlet position.

[0008] Furthermore, the main pipeline of the rainwater drainage pipe has a water guide pipe section between the water inlet pipe section and the drainage pipe section, the water inlet of the water guide pipe section is connected to the side of the main pipeline of the rainwater drainage pipe, and the water guide pipe section has at least a portion of the second transverse straight pipe at the position of its water inlet.

[0009] Furthermore, the water inlet of the water guide pipe section is connected to the main pipeline of the rainwater drainage pipe through a first three-way pipe fitting, and the water guide pipe section also has at least a portion of the third transverse straight pipe.

[0010] In some embodiments, the power generation unit includes a water turbine disposed in the rainwater drainage bypass pipe passage, and the water turbine is electrically connected to a distribution box and a load end.

[0011] Furthermore, the load end includes a building lighting system, an energy storage device or a backup power supply.

[0012] Furthermore, the gate valve group includes a first manual gate valve and a second manual gate valve which are arranged in the rainwater drainage bypass pipe, and the turbine is located between the first manual gate valve and the second manual gate valve.

[0013] Furthermore, the inspection hole group includes a first inspection hole and a second inspection hole, the first inspection hole is opened in the water inlet pipe section, and the second inspection hole is opened in the rainwater drainage bypass pipe and is located near the water inlet end of the turbine.

[0014] In some embodiments, the water outlet end of the rainwater drainage bypass pipe is connected to the drainage pipe section through a second three-way pipe fitting.

[0015] The present invention also provides a control method for a building energy comprehensive utilization system based on rainwater power generation, comprising the following steps: S1. Check the pipeline body and power generation unit, and open the gate valve group; S2. When necessary, control and maintain the pipeline body through the inspection hole group and gate valve group; When water flows into the inlet pipe section: When the water flow rate is not greater than the critical flow rate of the bypass unit, the water enters the water inlet pipe section, passes through the bypass unit, and is discharged along the drainage pipe section; When the water flow rate is greater than the critical flow rate of the bypass unit or the bypass unit is closed, water enters the water inlet pipe section, passes through the main pipeline of the rainwater drainage pipe, and is discharged along the drainage pipe section.

[0016] Compared with the prior art, the building energy comprehensive utilization system based on rainwater power generation and the control method thereof of the present invention have the following beneficial effects: The present invention discloses a building energy comprehensive utilization system based on rainwater power generation, comprising a pipeline main body, the pipeline main body comprising a drainage unit and a bypass unit, the bypass unit being provided with a power generation unit; the pipeline main body is provided with an inspection hole group and a gate valve group so as to control and maintain the pipeline main body; wherein: the drainage unit comprises a rainwater drainage pipe main pipeline, the bypass unit comprises a rainwater drainage bypass pipeline; the rainwater drainage pipe main pipeline has an inlet pipe section and a drainage pipe section; the rainwater drainage pipe main pipeline and the rainwater drainage bypass pipeline are both connected to the inlet pipe section, and the water outlet end of the rainwater drainage bypass pipeline is connected to the drainage pipe section; at the same time, the power generation unit can generate electricity based on water potential energy; when the water flow rate is not greater than the critical flow rate of the bypass unit, the water enters the inlet pipe section, passes through the bypass unit and is discharged along the drainage pipe section; when the water flow rate is greater than the critical flow rate of the bypass unit or the bypass unit is closed, the water enters the inlet pipe section, passes through the rainwater drainage pipe main pipeline and is discharged along the drainage pipe section. The present invention directly converts the gravitational potential energy generated during the drainage of rainwater from buildings into electrical energy through the power generation unit configured in the bypass unit, thereby providing clean and sustainable auxiliary energy for buildings and reducing traditional energy consumption. When the water flow rate is small, the pipeline body of the present invention preferentially drains water through the bypass unit, shortens the water flow path, reduces pipeline resistance, and improves drainage efficiency; when the water flow rate exceeds the critical value, it automatically switches to the main pipeline to avoid overloading of the bypass unit, ensure drainage stability, and can adaptively select the drainage path according to the real-time water volume. Moreover, even if the bypass unit of the present invention fails or is closed, the main pipeline can still independently complete the drainage function to avoid the risk of waterlogging in the building. In addition, the present invention supports independent maintenance of specific pipe sections or equipment through the provision of inspection hole groups and gate valve groups, improves maintenance efficiency, can adapt to different building layouts, and reduces the occupation of additional space. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings in the specification are used to provide further understanding of the present invention and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0018] Figure 1 This is a schematic diagram of the architecture of a comprehensive building energy utilization system based on rainwater power generation according to the present invention.

[0019] Among them, 1. rainwater drainage main pipeline, 2. first inspection hole, 3. rainwater drainage bypass pipeline, 4. first manual gate valve, 5. second inspection hole, 6. turbine, 7. distribution box, 8. load end, 9. second manual gate valve, 10. water inlet pipe section, 11. drainage pipe section, 12. first three-way pipe fitting, 13. first horizontal straight pipe, 14. second horizontal straight pipe, 15. third horizontal straight pipe, 16. second three-way pipe fitting. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0023] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0024] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0025] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] How to propose a rainwater power generation system based on the transformation of indoor rainwater drainage pipes without setting up water storage tanks, optimize the spatial layout of the building, and improve the efficiency of rainwater power generation.

[0027] Based on this, Figure 1 As shown, the present invention provides a building energy comprehensive utilization system based on rainwater power generation, including a pipeline main body, the pipeline main body includes a drainage unit and a bypass unit, the bypass unit is configured with a power generation unit; the pipeline main body is provided with an inspection hole group and a gate valve group to control and maintain the pipeline main body; wherein: The drainage unit includes a rainwater drainage main pipe 1, and the bypass unit includes a rainwater drainage bypass pipe 3; The main rainwater drainage pipe 1 has an inlet pipe section 10 and a drainage pipe section 11; the main rainwater drainage pipe 1 and the rainwater drainage bypass pipe 3 are both connected to the inlet pipe section 10, and the outlet end of the rainwater drainage bypass pipe 3 is connected to the drainage pipe section 11; at the same time, the power generation unit can generate electricity based on water potential energy; When the water flow rate is not greater than the critical flow rate of the bypass unit, water enters the water inlet pipe section, passes through the bypass unit, and is discharged along the drainage pipe section 11; when the water flow rate is greater than the critical flow rate of the bypass unit or the bypass unit is closed, water enters the water inlet pipe section, passes through the rainwater drainage pipe main pipeline 1, and is discharged along the drainage pipe section 11.

[0028] The present invention transforms the original rainwater drainage pipe of the building, does not need to install a water storage tank, saves the building roof space and equipment, installs the rainwater drainage bypass pipe 3 and the turbine 6, realizes potential energy driven power generation, and the electricity generated by the power generation unit can be used for load consumption after voltage stabilization, avoids installing a water storage tank in the building environment, and can save space. The present invention optimizes the design of the overall system pipeline. When the rainwater power generation system fails, the system and pipeline can be maintained at any time through the control of the inspection hole group and the gate valve group, without affecting the drainage function of the original rainwater pipe, thereby ensuring safety.

[0029] In the present invention, the water outlet of the water inlet pipe section 10 is connected to the water inlet of the rainwater drainage bypass pipe 3; the rainwater drainage bypass pipe 3 has at least a portion of the first transverse straight pipe 13 at its water inlet position. The first transverse straight pipe 13 of the present invention avoids turbulence in the rainwater drainage bypass pipe 3 caused by water flow impact, improves the operating stability of the turbine 6 of the power generation unit, can convert more potential energy into electrical energy, and improves the efficiency of power generation.

[0030] In some embodiments, the main pipeline 1 of the rainwater drainage pipe has a water guide pipe section between the water inlet pipe section 10 and the main pipeline 11 of the rainwater drainage pipe. The water inlet of the water guide pipe section is connected to the side of the main pipeline 1 of the rainwater drainage pipe, and the water guide pipe section has at least a portion of the second transverse straight pipe 14 at the position of its water inlet. Further, the water inlet of the water guide pipe section is connected to the drainage pipe 1 through the first three-way pipe fitting 12, and the water guide pipe section also has at least a portion of the third transverse straight pipe 15. The present invention forms a water guide channel between the second transverse straight pipe 14 and the first three-way pipe fitting 12 to guide the water flow to smoothly transition to the drainage pipe section. The second transverse straight pipe 14 can reduce the impact of the water flow on the pipe wall. The height of the second transverse straight pipe 14 is designed to be higher than the water inlet end connection port of the rainwater drainage bypass pipe 3, in order to allow rainwater to enter the rainwater drainage bypass pipe 3 first. The first three-way pipe fitting 12 can ensure that the water flow is unobstructed and avoid water accumulation or blockage.

[0031] Further preferably, the power generation unit of the present invention includes a turbine 6 arranged in the rainwater drainage bypass pipe 3, and the turbine 6 is electrically connected to the distribution box 7 and the load end 8. The gate valve group includes a first manual gate valve 4 and a second manual gate valve 9 arranged in the rainwater drainage bypass pipe 3, and the turbine 6 is located between the first manual gate valve 4 and the second manual gate valve 9. The turbine 6 of the present invention can convert the potential energy of rainwater into electrical energy, and then supply power to the load end 8 after voltage stabilization and rectification by the distribution box 7. The voltage stabilization and rectification of the distribution box 7 ensures that the output power is stable and adapts to the power demand of the building. The load end 8 can be connected to electrical equipment such as lighting, energy storage or backup power supply, which can improve energy utilization.

[0032] The inspection hole group includes a first inspection hole 2 and a second inspection hole 5. The first inspection hole 2 is opened in the water inlet pipe section 10, and the second inspection hole 5 is opened in the rainwater drainage bypass pipe 3 and is located near the water inlet end of the turbine 6. By opening the inspection holes at key positions, foreign objects can be quickly cleaned, downtime is reduced, and maintenance efficiency is improved. In addition, the standardized connection of the second three-way pipe fitting 16 reduces the complexity of construction.

[0033] The present invention also provides a control method for a building energy comprehensive utilization system based on rainwater power generation, comprising the following steps: S1. Check the pipeline body and power generation unit, and open the gate valve group; S2. When necessary, control and maintain the pipeline body through the inspection hole group and gate valve group; When water flows into the water inlet pipe section 10: When the water flow rate is not greater than the critical flow rate of the bypass unit, the water enters the water inlet pipe section, passes through the bypass unit, and is discharged along the drainage pipe section 11; When the water flow rate is greater than the critical flow rate of the bypass unit or the bypass unit is closed, water enters the water inlet pipe section, passes through the main rainwater drainage pipe 1, and is discharged along the drainage pipe section 11. The present invention dynamically adjusts the water flow path through flow monitoring, gives priority to power generation or ensures drainage, and optimizes energy utilization and drainage safety.

[0034] The following is a detailed description of a building energy comprehensive utilization system based on rainwater power generation and a control method thereof according to the present invention through specific embodiments.

[0035] like Figure 1 As shown, in the building energy comprehensive utilization system of the present invention, F1, F2, F3, and F4 are floors. Under normal working conditions, the first manual gate valve 4 and the second manual gate valve 9 should be in an open state, and the rainwater will flow through the drainage pipe main pipeline 1 and then flow into the drainage bypass pipeline 3. The potential energy drives the turbine 6 to generate electricity, and after voltage stabilization and rectification by the distribution box 7, it can provide power input to the load end 8. The first inspection hole 2 and the second inspection hole 5 can be used to check and clean foreign objects in the pipeline system. When the turbine 6 is in an abnormal state, the manual gate valve 4 and the manual gate valve 9 can be closed. At this time, the rainwater will flow through the drainage pipe main pipeline 1 and will not affect the drainage.

[0036] Specifically, in the actual operation of the building energy comprehensive utilization system, the operator checks and ensures that the first manual gate valve 4 and the second manual gate valve 9 of the bypass unit are in a fully open state, so that the rainwater drainage bypass pipe 3 is unobstructed. Verify that the water inlet pipe section 10 and the drainage pipe section 11 of the rainwater drainage main pipe 1 are not physically blocked or deformed. Check whether there are foreign objects inside the pipe through the first inspection hole 2 and the second inspection hole 5. If foreign objects are found, use cleaning tools to remove them through the inspection holes to ensure that the water flow path is unobstructed.

[0037] Confirm that the mechanical structure of the rotating shaft of the turbine 6 is not stuck, check the circuit connection status of the distribution box 7 to ensure that its voltage stabilization and rectification functions are normal, and verify the reliability of the electrical connection between the load end 8 and the distribution box 7.

[0038] In the scenario where the water flow rate is less than or equal to the critical water flow rate: after the rainwater enters from the water inlet pipe section 10, it preferentially flows through the rainwater drainage bypass pipe 3. The water flow drives the blades of the turbine 6 to rotate, converting the potential energy into mechanical energy, which is then converted into electrical energy through the generator. The distribution box 7 stabilizes and rectifies the electrical energy and transmits it to the load end 8 for consumption. The treated rainwater flows through the outlet end of the bypass pipe and is discharged through the second three-way pipe fitting 16 into the drainage pipe section 11.

[0039] In the scenario where the water flow rate is greater than the critical flow rate or the bypass unit fails: manually close the first manual gate valve 4 and the second manual gate valve 9 to cut off the passage of the bypass pipe 3; rainwater is directly discharged through the water guide pipe section of the rainwater drainage pipe main pipe 1 and quickly discharged through the drainage pipe section 11 to avoid overload or water accumulation of the building energy comprehensive utilization system.

[0040] Furthermore, in some actual working conditions, the critical flow determination basis needs to pre-set the maximum carrying flow of the bypass pipe 3 according to the building roof area and local rainfall intensity historical data. The operator can install a flow sensor to monitor the water flow state of the water inlet pipe section 10 in real time and determine whether to switch the path.

[0041] In actual work, if the turbine 6 makes an abnormal sound or has an abnormal speed, close the first manual gate valve 4 and the second manual gate valve 9 to cut off the water flow of the bypass pipe 3, check whether the blades of the turbine 6 are blocked by foreign objects through the second inspection hole 5, and disassemble and clean them if necessary; if the mechanical failure cannot be repaired on site, switch to the main pipe 1 for drainage, and start the backup power supply.

[0042] In addition, if the flow rate of the drainage pipe section 11 decreases abnormally or completely stagnates: check whether the water inlet pipe section 10 is blocked through the first inspection hole 2; check whether there is siltation at the end of the drainage pipe section 11 through the second three-way pipe fitting 16, and use a high-pressure water gun or mechanical dredging tool to clean it.

[0043] The system of the present invention is lubricated and maintained to prevent rust, and the connection sealing of the rainwater drainage bypass pipe 3 and the rainwater drainage pipe main pipe 1 is fully checked to prevent water leakage, and the attachments on the surface of the turbine 6 blades are regularly cleaned to maintain its rotation balance. If the system needs to be shut down for a long time, the gate valve group is closed, the residual water in the pipeline is drained to prevent freezing and cracking in winter, and the circuit connection between the distribution box 7 and the load end 8 is disconnected to avoid the risk of leakage.

[0044] Finally, it should be noted that the above is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any ordinary technician in the industry can smoothly implement the present invention as shown in the specification and described above, and any equivalent changes, modifications and evolutions made by using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the technical solution of the present invention.

Claims

1. A building energy comprehensive utilization system based on rainwater power generation, characterized in that: The pipeline body comprises a drainage unit and a bypass unit, wherein the bypass unit is provided with a power generation unit; the pipeline body is provided with a manhole group and a gate valve group so as to control and maintain the pipeline body; wherein: The drainage unit comprises a rainwater drainage main pipe (1), and the bypass unit comprises a rainwater drainage bypass pipe (3); The rainwater drainage pipe main pipe (1) comprises a water inlet pipe section (10) and a drainage pipe section (11); the rainwater drainage pipe main pipe (1) and the rainwater drainage bypass pipe (3) are both conductively connected to the water inlet pipe section (10), and the water outlet end of the rainwater drainage bypass pipe (3) is connected to the drainage pipe section (11); at the same time, the power generation unit can generate electricity based on water potential energy; When the water flow rate is not greater than the critical flow rate of the bypass unit, water enters the water inlet pipe section, passes through the bypass unit, and is discharged along the drainage pipe section (11); when the water flow rate is greater than the critical flow rate of the bypass unit or the bypass unit is closed, water enters the water inlet pipe section, passes through the main rainwater drainage pipe (1), and is discharged along the drainage pipe section (11).

2. The building energy comprehensive utilization system based on rainwater power generation according to claim 1 is characterized in that: The water outlet of the water inlet pipe section (10) is connected to the water inlet of the rainwater drainage bypass pipe (3); the rainwater drainage bypass pipe (3) has at least a portion of a first transverse straight pipe (13) at its water inlet position.

3. The building energy comprehensive utilization system based on rainwater power generation according to claim 2 is characterized in that: The rainwater drainage pipe main pipe (1) has a water guide pipe section between the water inlet pipe section (10) and the drainage pipe section (11); the water inlet of the water guide pipe section is connected to the side of the rainwater drainage pipe main pipe (1); and the water guide pipe section has at least a portion of a second transverse straight pipe (14) at the position of its water inlet.

4. The building energy comprehensive utilization system based on rainwater power generation according to claim 3 is characterized in that: The water inlet of the water guide pipe section is connected to the main pipeline (1) of the rainwater drainage pipe via a first three-way pipe fitting (12), and the water guide pipe section also has at least a portion of a third transverse straight pipe (15).

5. The building energy comprehensive utilization system based on rainwater power generation according to claim 1 is characterized in that: The power generation unit comprises a water turbine (6) arranged in a rainwater drainage bypass pipe (3) passage, and the water turbine (6) is electrically connected to a distribution box (7) and a load end (8).

6. The building energy comprehensive utilization system based on rainwater power generation according to claim 5 is characterized in that: The load end (8) includes a building lighting system, an energy storage device or a backup power supply.

7. The building energy comprehensive utilization system based on rainwater power generation according to claim 5 is characterized in that: The gate valve assembly comprises a first manual gate valve (4) and a second manual gate valve (9) which are arranged on a rainwater drainage bypass pipe (3); the water turbine (6) is located between the first manual gate valve (4) and the second manual gate valve (9).

8. The building energy comprehensive utilization system based on rainwater power generation according to claim 7 is characterized in that: The inspection hole group comprises a first inspection hole (2) and a second inspection hole (5), wherein the first inspection hole (2) is opened in the water inlet pipe section (10), and the second inspection hole (5) is opened in the rainwater drainage bypass pipe (3) and is located close to the water inlet end of the turbine (6).

9. The building energy comprehensive utilization system based on rainwater power generation according to claim 1 is characterized in that: The water outlet end of the rainwater drainage bypass pipe (3) is connected to the drainage pipe section (11) via a second three-way pipe fitting (16).

10. A control method for a building energy comprehensive utilization system based on rainwater power generation according to any one of claims 1 to 9, characterized in that: The steps include: S1. Check the pipeline body and power generation unit, and open the gate valve group; S2. When necessary, control and maintain the pipeline body through the inspection hole group and gate valve group; When water flows into the water inlet pipe section (10): When the water flow rate is not greater than the critical flow rate of the bypass unit, the water enters the water inlet pipe section, passes through the bypass unit, and is discharged along the drainage pipe section (11); When the water flow rate is greater than the critical flow rate of the bypass unit or the bypass unit is closed, water enters the water inlet pipe section, passes through the main rainwater drainage pipe (1), and is discharged along the drainage pipe section (11).

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