High-drop water fall structure
By designing a high-drop drop structure, and utilizing multiple drainage risers and horizontal pipes combined with retaining walls, the problem of poor adaptability of traditional drop wells in complex terrain is solved, achieving efficient and safe high-drop drainage, and reducing engineering costs and maintenance difficulties.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA RAILWAY WATER GRP CO LTD
- Filing Date
- 2025-08-29
- Publication Date
- 2026-08-04
AI Technical Summary
Traditional drop wells have limited drop heights, making them unsuitable for complex terrains such as mountainous areas with large undulations and high drop heights. This results in poor adaptability, and alternative solutions suffer from high engineering costs, difficult construction, and heavy maintenance workload.
A high-drop drop structure is provided, including an upstream inlet inspection well assembly, a drop assembly, a downstream drainage inspection well assembly, and a retaining wall. By setting up multiple drainage risers and drainage horizontal pipes, modular and closed ultra-high drop energy dissipation is achieved, avoiding large-scale civil engineering and professional energy dissipation facilities, and ensuring effective dissipation of water flow potential energy and smooth drainage.
It significantly reduces engineering costs and operation and maintenance difficulty, improves adaptability to complex terrain with high elevation differences, ensures drainage safety, reduces energy consumption and engineering costs, and lowers the difficulty of later maintenance. It is suitable for drainage areas with complex terrain such as low flow rate and high elevation difference.
Smart Images
Figure CN224591542U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of drop shower technology, and more specifically, to a high-drop drop shower structure. Background Technology
[0002] Currently, existing municipal drainage systems with high drop levels mainly rely on traditional drop manholes. However, their applicable drop height is limited, typically less than 4m to 6m. This makes them unsuitable for mountainous areas with large terrain undulations and drop heights often exceeding 10m. On the other hand, alternative solutions such as bypass pipelines or customized hydraulic energy dissipation structures present problems such as high project costs, difficult construction, and heavy workload for subsequent maintenance. Utility Model Content
[0003] This application aims to at least solve the technical problem in the related technology that the traditional drop well has a limited drop height, making it difficult to apply to mountainous areas and other terrains with large undulations and large drop heights, resulting in the poor adaptability of the traditional drop well to complex terrains with large drops.
[0004] To solve the above-mentioned technical problems, this application is implemented as follows:
[0005] This application provides a high-drop drop structure, comprising: an upstream inlet inspection well assembly, disposed on the upper side of the ground, for receiving upstream sewage; a drop assembly, comprising multiple drainage risers and multiple drainage horizontal pipes, with each drainage riser corresponding to each drainage horizontal pipe, the inlet end of the drainage riser connected to the upstream inlet inspection well assembly, and the outlet end of the drainage riser connected to the inlet end of the drainage horizontal pipe; a downstream drainage inspection well assembly, disposed on the lower side of the ground and connected to the outlet end of the drainage horizontal pipe, for receiving sewage discharged from the drop assembly; and a retaining wall disposed between the upstream inlet inspection well assembly and the drop assembly, with the drainage risers fixed to the retaining wall.
[0006] The high-drop drop structure provided in this application includes an upstream inlet manhole assembly, a drop assembly, a downstream drainage manhole assembly, and a retaining wall. The upstream inlet manhole assembly is located on the upper side of the ground level, at a higher upstream position, to receive upstream sewage. The downstream drainage manhole assembly is located on the lower side of the ground level, at a lower downstream position, with a drop of more than 10 meters between the two locations. The drop assembly is positioned between the upstream inlet manhole assembly and the downstream drainage manhole assembly to dissipate energy from the water discharged from the upstream inlet manhole assembly, thus achieving energy dissipation in the high-drop drop and ensuring drainage safety. The drop structure comprises multiple drainage risers and horizontal drainage pipes, with each riser corresponding to a horizontal pipe. The inlet of each riser connects to the upstream inlet manhole assembly, while the outlet connects to the inlet of the horizontal pipe. This allows water discharged from the upstream inlet manhole assembly to be dissipated before being safely discharged into the downstream manhole assembly, creating a continuous cycle. This ensures the safe discharge of water from a higher elevation to a lower elevation, effectively discharging water from upstream areas with significant terrain undulations and drop heights downstream. Additionally, the high-drop drop structure includes a retaining wall positioned between the upstream inlet manhole assembly and the drop structure to secure the risers and ensure their stability.
[0007] This application provides a high-drop drop structure, which achieves modular, closed-loop energy dissipation of ultra-high drops by setting up upstream inlet inspection well components, multiple independent drainage risers and drainage horizontal pipes arranged side by side, and downstream drainage inspection well components and retaining wall fixing structures. While avoiding large-scale civil engineering and professional energy dissipation facilities, it ensures effective dissipation of water flow potential energy and smooth drainage, significantly reducing engineering costs and operation and maintenance difficulties, and improving the adaptability of high-drop drop structures to complex terrains with large flow and high drops.
[0008] Additional aspects and advantages of this application will become apparent in the following description or may be learned by practice of this application. Attached Figure Description
[0009] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:
[0010] Figure 1 This is a schematic diagram of a high-drop drop structure according to an embodiment of this application;
[0011] Figure 2 for Figure 1 A schematic diagram of the AA cross-sectional structure of the high-drop waterfall structure in the embodiment shown.
[0012] in, Figure 1 and Figure 2 The correspondence between the reference numerals and component names in the attached drawings is as follows:
[0013] 100 High-drop drop structure, 110 Upstream inlet inspection well assembly, 112 Inlet inspection well, 114 Inlet pipe, 116 Outlet pipe, 118 Inlet inspection well manhole, 119 Inlet inspection well step, 120 Drop structure assembly, 122 Drainage riser, 124 Second inspection port, 126 Drainage horizontal pipe, 128 T-joint, 130 First end, 132 Second end, 134 Third end, 136 First inspection port, 138 Vent pipe, 140 Vent cap, 142 Pipe elbow, 144 Support, 150 Retaining wall, 160 Downstream drainage inspection well assembly, 162 Drainage inspection well, 164 Drainage pipe, 166 Drainage inspection well manhole, 168 Drainage inspection well step, 170 Concrete subbase, 200 Floor slab. Detailed Implementation
[0014] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.
[0015] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.
[0016] The following reference Figure 1 and Figure 2 This application describes a high-drop drop structure 100 provided according to some embodiments of the present application.
[0017] like Figure 1 and Figure 2 As shown, Figure 1 This is a schematic diagram of the high-drop drop structure 100 according to an embodiment of this application; Figure 2 for Figure 1 A schematic diagram of the AA cross-section of the high-drop drop structure 100 of the embodiment shown.
[0018] An embodiment of this application provides a high-drop drop structure 100, comprising: an upstream inlet inspection well assembly 110, disposed on the upper side of the ground 200, for receiving upstream sewage; a drop assembly 120, which includes multiple drainage risers 122 and multiple drainage horizontal pipes 126, with each drainage riser 122 corresponding to each drainage horizontal pipe 126, the inlet end of the drainage riser 122 connected to the upstream inlet inspection well assembly 110, and the outlet end of the drainage riser 122 connected to the inlet end of the drainage horizontal pipe 126; a downstream drainage inspection well assembly 160, disposed on the lower side of the ground 200 and connected to the outlet end of the drainage horizontal pipe 126, for receiving sewage discharged from the drop assembly 120; and a retaining wall 150, disposed between the upstream inlet inspection well assembly 110 and the drop assembly 120, with the drainage risers 122 fixed to the retaining wall 150.
[0019] The high-drop drop structure 100 provided in this application includes an upstream inlet manhole assembly 110, a drop assembly 120, a downstream drainage manhole assembly 160, and a retaining wall 150. The upstream inlet manhole assembly 110 is located above the ground level 200, at a higher upstream position, to receive upstream sewage. The downstream drainage manhole assembly 160 is located below the ground level 200, at a lower downstream position, with a drop of more than 10 meters between the two locations. The drop assembly 120 is positioned between the upstream inlet manhole assembly 110 and the downstream drainage manhole assembly 160 to dissipate energy from the water discharged from the upstream inlet manhole assembly 110, thus achieving energy dissipation in the high-drop drop and ensuring drainage safety. The drop structure 120 includes multiple drainage risers 122 and multiple drainage horizontal pipes 126, with each drainage riser 122 corresponding to each drainage horizontal pipe 126. The inlet end of the drainage riser 122 is connected to the upstream inlet inspection well assembly 110, and the outlet end of the drainage riser 122 is connected to the inlet end of the drainage horizontal pipe 126. This allows the water discharged from the upstream inlet inspection well assembly 110 to be dissipated and then safely discharged into the downstream drainage inspection well assembly 160, circulating in sequence. This achieves the safe discharge of water from a high place to a low place, that is, the safe discharge of upstream water with large topographic relief and high drop height to the downstream through the drop structure 120. In addition, the high-drop drop structure 100 is also equipped with a retaining wall 150, which is located between the upstream water inlet inspection well assembly 110 and the drop assembly 120. The retaining wall 150 is used to fix the drainage riser 122, ensure the stability of the drainage riser 122, and improve the overall stability of the high-drop drop structure 100.
[0020] Specifically, in the design of municipal drainage pipe networks, for pipe sections with significant elevation differences between upstream and downstream, drop manholes are typically installed to eliminate the potential energy generated by sewage, preventing scouring of downstream pipelines and thus reducing the impact of elevation differences. According to the "Outdoor Drainage Design Standard" (GB 50014-2021), drop manholes are recommended when the drop head is 1.0m to 2.0m; drop manholes should be installed when the drop head is greater than 2.0m. When the inlet pipe diameter of the drop manhole is no greater than 200mm, the primary drop head height should not exceed 6m; when the pipe diameter is 300mm to 600mm, the primary drop head height should not exceed 4m, and the drop method can be a vertical pipe or a rectangular vertical channel; when the pipe diameter is greater than 600mm, the primary drop head height and drop method should be determined by hydraulic calculations.
[0021] In actual design work, some design sites are located in mountainous areas with large terrain elevation differences, with drop height differences of 10m or more. The design standard is only applicable to situations where the drop height is less than 4m to 6m, which has great limitations. Usually, detours are used to avoid the drop or hydraulic calculations are used to set energy dissipation measures to solve the elevation difference problem, but this has problems such as high engineering cost, great difficulty in implementation, and large amount of maintenance work in the later stage.
[0022] To address the shortcomings of existing technologies, this application aims to provide a high-drop drop structure 100 suitable for high-drop drainage conditions. By using multiple drainage risers 122 to replace traditional large-diameter, high-strength risers, drop wells, or professionally designed hydraulic energy-dissipating drop structures, it achieves energy dissipation through high-drop drop and ensures drainage safety. The high-drop drop structure 100 of this application reduces the number of drop wells and the amount of engineering work, lowers project costs, and allows for flexible adjustment of the diameter and number of drainage risers 122 and the size of drop wells according to the design flow rate, thus having a wide range of applications.
[0023] For example, assuming the diameter of the drainage riser 122 is DN150, the drainage capacity of a single drainage riser 122 is 6.40 L / s, and the drainage capacity of 10 drainage risers 122 is 64 L / s. Considering a total variation coefficient of 2.02, the average hourly water delivery capacity is 31.68 L / s, totaling 114.06 m. 3 With a capacity of 150L / (person.d) per person per hour, it can meet the drainage needs of 18,250 people. It is particularly suitable for drainage areas with small sewage volumes and large topographical differences, such as small villages, residential communities, and enterprise clusters.
[0024] This application provides a high-drop drop structure 100, which achieves modular, closed-loop energy dissipation of ultra-high drops by setting up an upstream inlet inspection well assembly 110, multiple independent drainage risers 122 and drainage horizontal pipes 126 arranged side by side, and a downstream drainage inspection well assembly 160 and retaining wall 150 fixed structure. While avoiding large-scale civil engineering and specialized energy dissipation facilities, it ensures effective dissipation of water flow potential energy and smooth drainage, significantly reducing project costs and operation and maintenance difficulty, and improving adaptability to complex terrains such as low flow rates and high drops. Moreover, it can dissipate energy for smaller sewage flows and sewage in areas with different elevation differences, reducing energy consumption and project costs. Furthermore, the drainage risers 122 are easy to maintain. Since the drainage risers 122 are set up independently, maintenance of a single drainage riser 122 does not affect the overall system operation and maintenance. The depth of the downstream inspection wells and the drainage horizontal pipes 126 only need to meet the minimum backfill requirements, which can reduce the overall downstream burial depth and lower project costs.
[0025] In specific applications, the high-drop drop structure 100 is a drop system suitable for high-drop drainage conditions. The drainage riser 122 and drainage horizontal pipe 126 can be made of plastic pipes such as UPVC to reduce costs.
[0026] In some embodiments, optionally, such as Figure 1 and Figure 2 As shown, the upstream inlet inspection well assembly 110 includes: an inlet inspection well 112 for containing upstream sewage; an inlet pipe 114 connected to the inlet inspection well 112, through which upstream sewage flows into the inlet inspection well 112; multiple outlet pipes 116, one end of each outlet pipe 116 connected to the inlet inspection well 112, and the other end passing through a retaining wall 150 and connected to a drainage riser 122; an inlet inspection well manhole 118 located at the top of the inlet inspection well 112 for personnel to enter and exit for maintenance; and an inlet inspection well step 119 located on the side wall of the inlet inspection well 112 and below the inlet inspection well manhole 118.
[0027] Specifically, such as Figure 1 and Figure 2 As shown, the upstream inlet inspection well assembly 110 includes an inlet inspection well 112, an inlet pipe 114, multiple outlet pipes 116, an inlet inspection well manhole 118, and inlet inspection well steps 119. The inlet pipe 114 is connected to the inlet inspection well 112, allowing upstream sewage to flow into the inlet inspection well 112. One end of each outlet pipe 116 is connected to the inlet inspection well 112, and the other end passes through a retaining wall 150 and connects to a drainage riser 122. The inlet inspection well manhole 118 is located at the top of the inlet inspection well 112 for personnel access and maintenance. The inlet inspection well steps 119 are located on the side wall of the inlet inspection well 112, below the manhole 118, for maintenance personnel to access the inspection well.
[0028] Specifically, by setting up an inlet inspection well 112 with manholes and steps to accommodate and buffer upstream sewage, and using multiple outlet pipes 116 that are horizontally inserted through the retaining wall 150 to evenly distribute the sewage to each independent drainage riser 122, not only is the hydraulic load on a single pipe and the risk of scouring effectively reduced, but the combination of manholes and steps also provides a safe and convenient closed maintenance passage, significantly improving the maintainability and operational safety of the system.
[0029] In some embodiments, optionally, such as Figure 1 and Figure 2 As shown, the drop shower assembly 120 also includes: a three-way pipe 128, disposed between the outlet pipe 116 and the drainage riser 122, the three-way pipe 128 including a first end 130, a second end 132 and a third end 134, the first end 130 being connected to the inlet pipe 114 and the second end 132 being connected to the drainage riser 122; a vent pipe 138, disposed on the upper side of the drainage riser 122 and connected to the third end 134 of the three-way pipe 128; and a vent cap 140, disposed on the top of the vent pipe 138 for venting.
[0030] Specifically, the drop shower assembly 120 also includes a three-way pipe 128, a vent pipe 138, and a vent cap 140. The three-way pipe 128 is positioned between the outlet pipe 116 and the drainage riser 122. The three-way pipe 128 has three ports: a first end 130, a second end 132, and a third end 134. The first end 130 is connected to the inlet pipe 114, the second end 132 is connected to the drainage riser 122, and the third end 134 is connected to the vent pipe 138. The vent cap 140 is positioned at the top of the vent pipe 138 to expel air during drainage, ensuring smooth drainage.
[0031] Specifically, the outlet pipe 116, drainage riser 122 and vent pipe 138 are connected in one piece by a three-way pipe 128, so that the vent pipe 138 is directly connected to the upstream of the drainage riser 122 through the third end 134 of the three-way pipe 128. With the help of the vent cap 140 at the top, the gas in the pipe is discharged in real time, effectively balancing the internal pressure of the drainage riser 122, avoiding poor drainage or water seal damage caused by air resistance, and ensuring the continuous and stable operation of the sewage energy dissipation process under ultra-high drop conditions.
[0032] In specific applications, the tee pipe 128 can be specifically set as a downstream tee, the diameter of the vent pipe 138 is the same as the diameter of the drainage riser pipe 122, and the setting height of the vent cap 140 can be adjusted according to the specific site conditions, which will not be listed here.
[0033] In some embodiments, optionally, such as Figure 1 and Figure 2As shown, the tee pipe 128 has a first inspection port 136 for inspection and maintenance; the drainage riser pipe 122 has a second inspection port 124, which is located at the bottom of the drainage riser pipe 122 and is used for inspection and maintenance.
[0034] Specifically, by opening a first inspection port 136 in the tee pipe 128 and setting a second inspection port 124 at the bottom of the drainage riser 122, a three-dimensional maintenance node is formed, which allows for quick location and clearing of local blockages or deposits, enabling independent maintenance of a single pipe unit, avoiding system shutdown, and significantly improving the ease of operation and maintenance and the reliability of continuous operation of the high-drop drainage structure.
[0035] In practical applications, the tee pipe 128 (i.e., the downstream tee) includes a first inspection port 136 for easy maintenance and repair. The drainage riser 122 has a second inspection port 124 located at its bottom, specifically 1 meter downstream of the ground. This second inspection port 124 is for cleaning and inspection, facilitating future operation, maintenance, and repair. The specific choice depends on the actual usage and will not be listed here.
[0036] In some embodiments, optionally, such as Figure 1 and Figure 2 As shown, the drop assembly 120 also includes a pipe elbow 142, which is connected between the drainage riser 122 and the drainage horizontal pipe 126, and the bending radius of the pipe elbow 142 is greater than or equal to 4 times the pipe diameter of the pipe elbow 142.
[0037] Specifically, the drop assembly 120 also includes a pipe elbow 142. The pipe elbow 142 is connected between the drainage riser 122 and the drainage horizontal pipe 126, and the bending radius of the pipe elbow 142 is greater than or equal to four times the diameter of the pipe elbow 142.
[0038] Specifically, by setting a pipe elbow 142 with a bending radius of not less than 4 times the pipe diameter between the drainage riser 122 and the drainage horizontal pipe 126, the local resistance and head loss when the water flow turns are significantly reduced, and the pipe vibration or solid particle deposition and blockage caused by the impact of the high-speed falling sewage due to the sharp bend is avoided, so as to ensure the hydraulic transmission continuity of each independent drainage unit and the long-term operational stability of the system under ultra-high drop conditions.
[0039] In specific applications, pipe elbow 142 can be specifically set as a 90° elbow. That is, the connection between drainage riser 122 and downstream drainage horizontal pipe 126 is made by a 90° elbow with a bending radius of not less than 4 times the pipe diameter, to ensure smooth water flow and avoid local siltation and blockage. The specific choice can be made according to the actual use situation, and will not be listed here.
[0040] In some embodiments, optionally, such as Figure 1 and Figure 2 As shown, the drop structure 120 also includes a bracket 144, and the drainage riser 122 is fixed to the retaining wall 150 through the bracket 144.
[0041] Specifically, multiple drainage risers 122 are rigidly fixed to the retaining wall 150 structure by bracket 144, so that the pipe load and water flow impact force are effectively transferred to the bearing system of retaining wall 150, avoiding vibration displacement or loosening of the risers due to ultra-high drop drainage, and ensuring the structural stability and long-term operational safety of the modular energy dissipation unit.
[0042] In some embodiments, optionally, such as Figure 2 As shown, the height H of the drainage riser 122 satisfies: 6m≤H≤20m.
[0043] Specifically, such as Figure 2 As shown, the height of the drainage riser 122 is set to H. By limiting the height of the drainage riser 122 to the range of 6m to 20m, it can be accurately adapted to the common high elevation difference conditions in mountainous terrain. While breaking through the height limit of traditional drop wells, it ensures that the water flow potential energy of a single riser can be fully dissipated and avoids pipe pressure damage due to excessive drop. This significantly expands the terrain adaptability and engineering safety of the modular energy dissipation system.
[0044] In specific applications, the height H of the drainage riser 122 can be set to 6m, 8m, 10m, 12m, 15m, 18m, 20m, etc., which can be selected according to the actual use situation, and will not be listed here.
[0045] In some embodiments, optionally, such as Figure 1 and Figure 2 As shown, the diameter of the drainage riser 122 is one or more combinations of DN75, DN100 or DN150.
[0046] Specifically, by limiting the diameter of the drainage riser 122 to DN75, DN100 or DN150 in a modular unit, the system can meet the high-efficiency energy dissipation requirements of small-flow sewage while significantly reducing the pressure load and material cost of a single pipe. Its small-diameter characteristics are suitable for dispersing hydraulic impact under ultra-high drop conditions and facilitate rapid maintenance and replacement of individual units in the later stages, fundamentally solving the contradiction between economy and adaptability of traditional large-diameter drop structures in high-drop, low-flow scenarios.
[0047] In some embodiments, optionally, such as Figure 1 and Figure 2As shown, the downstream drainage inspection well assembly 160 includes: a drainage inspection well 162, connected to the drainage horizontal pipe 126, for receiving sewage discharged from the drop assembly 120; a drainage pipe 164, connected to the drainage inspection well 162, for discharging sewage from the drainage inspection well 162; a drainage inspection well manhole 166, located at the top of the drainage inspection well 162, for personnel to enter and exit for maintenance; and a drainage inspection well step 168, located on the side wall of the drainage inspection well 162 and below the drainage inspection well manhole 166.
[0048] Specifically, the downstream drainage inspection well assembly 160 includes a drainage inspection well 162, a drainage pipe 164, a drainage inspection well manhole 166, and a drainage inspection well step 168. The drainage inspection well 162 is connected to the horizontal drainage pipe 126 and is used to collect sewage discharged from the drop assembly 120; the drainage pipe 164 is connected to the drainage inspection well 162 and is used to discharge sewage from the drainage inspection well 162; the drainage inspection well manhole 166 is located at the top of the drainage inspection well 162 for personnel to enter and exit for maintenance; the drainage inspection well step 168 is located on the side wall of the drainage inspection well 162 and below the drainage inspection well manhole 166, facilitating use by maintenance personnel.
[0049] Specifically, the wastewater after energy dissipation is collected through the drainage inspection well 162 and the impact of the water flow is buffered. It is then smoothly introduced into the downstream pipe network through the drainage pipe 164. At the same time, the top manhole and the side wall steps form a closed maintenance passage, which allows maintenance personnel to safely and quickly enter the well to deal with siltation faults, ensuring efficient discharge and long-term controllable operation of the high-drop drainage system terminal.
[0050] In practical applications, sewage enters the upstream inlet inspection well assembly 110, then passes through the retaining wall 150 and enters the drop assembly 120. It is then evenly distributed along the inlet pipe 114 to each drainage riser 122. The maximum diameter of a single drainage riser 122 is DN150, corresponding to a maximum drainage capacity of 6.40L / s. The sewage dissipates energy through the drainage riser 122 and enters the downstream drainage horizontal pipe 126. Finally, it enters the downstream drainage inspection well assembly 160 through the drainage horizontal pipe 126, completing the drop.
[0051] In some embodiments, optionally, such as Figure 1 and Figure 2 As shown, the downstream drainage inspection well assembly 160 also includes a concrete pad 170, which is located at the bottom corner of the drainage inspection well 162 to prevent sewage from accumulating and fermenting.
[0052] Specifically, the downstream drainage inspection well assembly 160 also includes a concrete cushion layer 170. The concrete cushion layer 170 is located at the bottom corner of the drainage inspection well 162 to prevent sewage from accumulating and fermenting.
[0053] Specifically, by setting a concrete pad 170 at the bottom corner of the drainage inspection well 162 to form a flow guiding structure, the sewage is forced to flow along a predetermined path without dead angles, completely eliminating the space for sediment to stagnate and ferment, inhibiting the growth of anaerobic bacteria and the generation of hydrogen sulfide gas from the source, and ensuring the water quality hygiene and safety of the high-drop drainage system terminal and the health protection of operation and maintenance personnel.
[0054] In specific applications, the concrete cushion layer 170 is specifically a plain concrete cushion layer with an i≥10% content, that is, a plain concrete cushion layer with an i≥10% content is laid inside the downstream drainage inspection well assembly 160 to improve hydraulic conditions, prevent dead zones, and avoid anaerobic fermentation. The specific choice can be made according to the actual application situation, and will not be listed here.
[0055] In the description of this application, the term "multiple" refers to two or more. Unless otherwise expressly defined, the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The terms "connection," "installation," "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.
[0056] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0057] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A high-head hydropower structure, characterized by, include: The upstream inlet inspection well assembly is located on the upper side of the ground and is used to receive upstream sewage; A drop shower assembly includes multiple drainage risers and multiple drainage horizontal pipes, with each drainage riser corresponding to each drainage horizontal pipe. The inlet end of each drainage riser is connected to the upstream inlet inspection well assembly, and the outlet end of each drainage riser is connected to the inlet end of each drainage horizontal pipe. The downstream drainage inspection well assembly is located on the lower side of the ground and connected to the outlet end of the drainage horizontal pipe to receive sewage discharged from the drop assembly; A retaining wall is installed between the upstream water inlet inspection well assembly and the drop assembly, and the drainage riser is fixed to the retaining wall.
2. The high-drop waterfall structure according to claim 1, characterized in that, The upstream water intake inspection well assembly includes: Inlet inspection well, used to contain upstream sewage; The inlet pipe is connected to the inlet inspection well, and upstream sewage flows into the inlet inspection well through the inlet pipe; Multiple water outlet pipes, one end of each water outlet pipe is connected to the water inlet inspection well, and the other end passes through the retaining wall and is connected to the drainage riser; A manhole for the water inlet inspection well is located at the top of the water inlet inspection well and is used for personnel to enter and exit for maintenance. The steps of the water inlet inspection well are set on the side wall of the water inlet inspection well and located at the lower part of the manhole of the water inlet inspection well.
3. The high-drop waterfall structure according to claim 2, wherein The drop structure also includes: A three-way pipe is installed between the outlet pipe and the drainage riser. The three-way pipe includes a first end, a second end, and a third end. The first end is connected to the inlet pipe, and the second end is connected to the drainage riser. A vent pipe is installed on the upper side of the drainage riser and connected to the third end of the tee pipe; A vent cap, located at the top of the vent pipe, is used for venting.
4. The high-drop waterfall structure according to claim 3, wherein The tee pipe has a first inspection port for inspection and maintenance; The drainage riser is provided with a second inspection port, which is located at the bottom of the drainage riser and is used for inspection and maintenance.
5. The high-drop waterfall structure according to claim 1, wherein The drop structure also includes: A pipe elbow is connected between the drainage riser and the drainage horizontal pipe, and the bending radius of the pipe elbow is greater than or equal to four times the pipe diameter of the pipe elbow.
6. The high-drop waterfall structure according to claim 1, wherein The drop structure also includes: The support bracket is used to fix the drainage riser to the retaining wall.
7. The high-drop waterfall structure according to claim 1, wherein The height H of the drainage riser must satisfy the following condition: 6m ≤ H ≤ 20m.
8. The high-drop waterfall structure according to claim 1, wherein The diameter of the drainage riser is one or more combinations of DN75, DN100 or DN150.
9. The high-drop waterfall structure according to any one of claims 1 to 8, characterized in that The downstream drainage inspection well assembly includes: A drainage inspection well, connected to the drainage horizontal pipe, is used to contain the sewage discharged by the drop structure; A drain pipe, connected to the drainage inspection well, is used to discharge sewage from the drainage inspection well; A manhole for drainage inspection wells is located at the top of the drainage inspection wells for personnel to enter and exit for inspection and maintenance. The drainage inspection well steps are installed on the side wall of the drainage inspection well and located below the manhole of the drainage inspection well.
10. The high-drop waterfall structure according to claim 9, wherein The downstream drainage inspection well assembly also includes: A concrete cushion layer is placed at the bottom corner of the drainage inspection well to prevent sewage from accumulating and fermenting.