An integrated well of a sewage lifting pump station and auxiliary facilities

Abstract

The present disclosure relates to the technical field of municipal drainage, and particularly relates to a sewage lifting pump station and an integrated integrated well of auxiliary facilities, which integrates a sluice well, a water inlet grid well, a pump well and an energy dissipation well and their operation spaces in the same well body. The integrated well of the present disclosure comprises: a well body, which is internally divided into a lower space and an upper space from bottom to top; a pump well, which is arranged in the middle of the lower space; a sluice well and a water inlet grid well, which are arranged on the lower annular space on the periphery of the pump well and are separated by a lower weir; a pump station operation well, which is arranged in the middle of the upper space and is located above the pump well; a plate gate operation well and an energy dissipation well, which are arranged in the upper annular space on the periphery of the pump station operation well and are separated by an upper weir; wherein sewage enters the sluice well through the water inlet pipe in the open state of the plate gate, and enters the water inlet grid well by crossing the lower weir. The present disclosure is conducive to reducing the amount of civil engineering, shortening the construction period, and improving the implementability of urban built-up areas and narrow road areas.

Description

Technical Field

[0001] This disclosure relates to the field of municipal drainage technology, and in particular to an integrated well that integrates a sluice gate well, an inlet bar well, a pump well, an energy dissipation well, and their operating space into the same well body as a sewage lifting pump station and its ancillary facilities. Background Technology

[0002] Wastewater lifting pump stations are crucial structures in urban wastewater collection and transportation systems. They are typically used to raise low-level wastewater to a higher level, under constraints such as pipe depth, terrain elevation differences, or transportation distance, ensuring the wastewater can continue to be transported to subsequent treatment facilities via gravity or pressure flow. Both the inlet and outlet sides of the wastewater lifting pump station usually require supporting functional units for interception, debris containment, lifting, maintenance, and energy dissipation to ensure safe operation and reduce the adverse effects of debris blockage, water flow impact, and equipment failure on the pipe network system.

[0003] In existing sewage lifting pump stations, the common practice is to install gate wells and bar screen wells at the front end of the pump station, a pump well inside the main body of the pump station, and an energy dissipation well at the outlet end of the pump station. Gate wells are usually used to install gates or sluice gates to cut off the incoming water during pump station maintenance or troubleshooting; bar screen wells are usually used to install bar screens or bar screen cleaning equipment to intercept debris such as plastic bags, branches, and fibers in the sewage; pump wells are used to lift the sewage; and energy dissipation wells are used to reduce the flow velocity and impact energy of the effluent after pumping, so that the effluent can be smoothly connected to the downstream drainage pipe.

[0004] In the traditional layout described above, gate wells, bar screen wells, pump wells, and energy dissipation wells are often set up as independent well bodies, connected by pipelines or channels. While this method can meet basic operational needs, in urban built-up areas, areas with narrow roads, or areas with limited construction space, the dispersed arrangement of multiple well bodies occupies significant land resources and increases the workload of excavation, well construction, pipeline connection, and equipment installation. Furthermore, the dispersed arrangement of each well body requires maintenance personnel to travel between multiple well bodies for inspection, gate opening and closing, bar screen cleaning, pump maintenance, and energy dissipation facility checks, resulting in longer maintenance paths and reduced management convenience.

[0005] Furthermore, decentralized wells typically require numerous connecting pipes or structures, which can lead to increased hydraulic losses, higher leakage risks, and more maintenance points. For engineering scenarios requiring wastewater interception, debris containment, pump lifting, post-pump energy dissipation, and personnel maintenance within a limited space, the existing decentralized layout still has room for improvement in terms of land use control, construction organization, and centralized operation and maintenance. Summary of the Invention

[0006] I. Technical problems to be solved

[0007] This disclosure aims to at least partially solve one of the aforementioned technical problems.

[0008] II. Technical Solution

[0009] This disclosure provides an integrated well for a sewage lifting pump station and its ancillary facilities. The integrated well includes: a well body, internally divided into a lower space and an upper space from bottom to top; a pump well 5, located in the middle of the lower space, housing a submersible pump 15 connected to a pressure pipe 11; a gate well 4 and an inlet bar screen well 6, both located in the lower annular space surrounding the pump well 5, separated by a lower weir 8; the gate well 4 connected to an inlet pipe 9 and equipped with a gate 12; the inlet bar screen well 6 housing a pulverizing bar 13 and separated from the pump well 5 by a well wall with a water passage hole 18; and a pump station operation well 2, located in the middle of the upper space and above the pump well 5, connected to the pump well 5 through a second inspection hole 20. At least a portion of the pressure pipe 11 is located within the pump station operation well 2, and this section is equipped with... Pressure pipe valve 14; gate control well 1 and energy dissipation well 3, both located in the upper annular space surrounding pump station control well 2, separated by upper weir 7; gate control well 1 is located above gate slot well 4, connected to gate slot well 4 through first inspection hole 19, and equipped with gate opening and closing device 16 for opening and closing gate 12; energy dissipation well 3 is located above inlet grid well 6, the outlet end of pressure pipe 11 leads to energy dissipation well 3, and energy dissipation well 3 is connected to outlet pipe 10; sewage enters gate slot well 4 through inlet pipe 9 when gate 12 is open, crosses lower weir 8 and enters inlet grid well 6, and flows through crushing grid 13, water passage hole 18, pump well 5, pressure pipe 11, energy dissipation well 3 and outlet pipe 10.

[0010] III. Beneficial Effects

[0011] As can be seen from the above technical solution, this disclosure has at least one of the following beneficial effects compared to the prior art:

[0012] First, it can form a six-zone integrated pump station structure with upper and lower layers and inner and outer partitions within the same well body.

[0013] In this disclosure, by placing the pump well 5 in the middle of the lower space, the gate well 4 and the inlet bar well 6 in the lower annular space surrounding the pump well 5, the pump station operation well 2 in the middle of the upper space, and the gate operation well 1 and the energy dissipation well 3 in the upper annular space surrounding the pump station operation well 2, the gate well, bar, pump well, energy dissipation well, and their operation space are integrated into the same well body according to the vertical correspondence and internal and external coordination relationship. Compared with the traditional arrangement of multiple well bodies being scattered, this disclosure can reduce the number of independent well bodies, the inter-well connecting structures, and the ground footprint. Compared with the structure that only concentrates pumps, bar screens, valves, and other equipment in the cylinder or pump house, this disclosure further defines the hierarchical position and correspondence between the functional wells and the operation wells, thereby helping to reduce the amount of civil engineering work, shorten the construction period, and improve the feasibility in urban built-up areas, narrow road areas, or areas with limited land use.

[0014] Specifically, under certain engineering implementation conditions, compared with the traditional decentralized layout scheme, the land area can be reduced by about 50% to 60%, the civil engineering investment can be reduced by about 30% to 40%, and the construction period can be shortened by about 30%.

[0015] Second, it can form a continuous water flow path that takes into account interception, sedimentation, pollution interception, lifting and energy dissipation.

[0016] In this disclosure, sewage, with the gate 12 open, enters the gate slot well 4 through the inlet pipe 9, crosses the lower weir 8, and enters the inlet bar screen well 6. After being treated by the crushing bar 13, it enters the pump well 5 through the water passage 18, and is then lifted by the submersible pump 15 through the pressure pipe 11 to the energy dissipation well 3, and discharged through the outlet pipe 10. Thus, the gate slot well 4 can cooperate with the gate 12 at the inlet end to achieve interception and preliminary sedimentation; the inlet bar screen well 6 can intercept or crush debris through the crushing bar 13; the pump well 5 can complete the sewage lifting; and the energy dissipation well 3 can receive the pumped water and dissipate energy. Compared with the arrangement of gate wells, bar screen wells, pump station wells or valve wells in a linear series, this disclosure compresses the above water flow path into the upper and lower integrated wells, and achieves orderly connection between each functional area through the lower weir 8, water passage 18 and pressure pipe 11, thereby reducing the complexity of the connection between wells, reducing the risk of leakage and hydraulic loss, and improving the continuity and stability of system operation.

[0017] Third, it enables maintenance operation paths to correspond with hydraulic function paths, thereby improving operation and maintenance efficiency.

[0018] In this disclosure, the gate control well 1 is located above the gate slot well 4 and is connected to the gate slot well 4 through the first inspection hole 19; the pump station control well 2 is located above the pump well 5 and is connected to the pump well 5 through the second inspection hole 20; the pressure pipe valve 14 is installed on the pressure pipe 11 section inside the pump station control well 2. Therefore, during pump maintenance or troubleshooting, maintenance personnel can first close the gate 12 in the gate control well 1 using the gate opening and closing device 16, then close the pressure pipe valve 14 in the pump station control well 2, and subsequently enter the pump well 5 through the second inspection hole 20 to maintain the submersible pump 15. Compared to structures that only provide an upper platform, maintenance room, or hoisting maintenance layer, this disclosure does not simply provide space for personnel to stand or for equipment hoisting, but rather arranges the upper control wells and lower functional wells according to the equipment maintenance objects, thereby reducing the need for maintenance personnel to travel between multiple dispersed wells, shortening the maintenance operation path, and improving maintenance organization efficiency.

[0019] Fourth, it can incorporate the post-pump energy dissipation structure into the integrated well and reduce the need for independent energy dissipation structures.

[0020] In this disclosure, the energy dissipation well 3 is located in the upper annular space, and the outlet end of the pressure pipe 11 leads to the energy dissipation well 3. Furthermore, an energy dissipation packing layer can be installed inside the energy dissipation well 3, with the outlet end of the pressure pipe 11 facing the energy dissipation packing layer, or the sewage can be allowed to fall to the pebble layer 17 for energy dissipation through a vertical pipe section. The support 21 can also fix the vertical pipe section of the pressure pipe 11. Compared to integrated pump station structures that mainly focus on inlet screens, collection tanks, submersible pumps, valves, or operating wells, this disclosure arranges the post-pump energy dissipation space as part of the integrated well, so that the high-velocity water flow after the pump completes energy dissipation in the well before entering the outlet pipe 10. This helps to reduce the impact of the outlet water, reduce the risk of scouring of downstream pipes and inspection well structures, and improve the structural stability of the pressure pipe 11 under the condition of falling water discharge.

[0021] Fifth, differentiated inspection holes can improve operational safety under abnormal and maintenance conditions.

[0022] In this disclosure, the first inspection hole 19 can be a grating-type inspection hole, allowing personnel to enter the gate slot well 4 from the gate operating well 1, and allowing sewage overflowing from the energy dissipation well 3 to the gate operating well 1 to be discharged into the gate slot well 4, preventing water accumulation in the gate operating well 1 from affecting personnel operation. The second inspection hole 20 can be a sealed-cover type inspection hole, with the sealed cover plate covering the second inspection hole 20 to prevent odor from the pump well 5 from entering the pump station operating well 2, improving the valve operation and pump maintenance environment. Compared to structures that only provide ordinary inspection holes or ordinary maintenance platforms, this disclosure allows different inspection holes to perform different safety auxiliary functions, ensuring personnel passage while also considering overflow water discharge and odor blocking, thereby improving the safety and comfort of pump station operation and maintenance.

[0023] Sixth, it can improve the convenience of personnel passage and the stability of hydraulic connections through elevation matching.

[0024] In this disclosure, the bottom elevations of the gate operating well 1 and the pump station operating well 2 can be determined based on the bottom elevation of the outlet pipe 10. The bottom elevation of the energy dissipation well 3 can be lower than that of the gate operating well 1 and the pump station operating well 2. Furthermore, the operating surface within the energy dissipation well 3 can be raised to be level with or nearly level with the bottom of the gate operating well 1 using a pebble layer 17, allowing personnel to smoothly enter the energy dissipation well 3 from the gate operating well 1 for cleaning or maintenance. The bottom elevations of the gate slot well 4 and the inlet bar well 6 can be determined based on the bottom elevation of the inlet pipe 9. The bottom elevation of the pump well 5 can be lower than that of the gate slot well 4 and the inlet bar well 6, and is determined based on the start-up and stop-down water levels of the submersible pump 15. Therefore, this disclosure can balance the connection of the upper operating surfaces, the formation of the lower sedimentation space, the effective water depth of the pump well, and the pump operating conditions, ensuring that the structural layout, hydraulic conditions, and personnel access requirements are coordinated.

[0025] Seventh, the water passage 18 can be reused to improve the convenience of internal passage and maintenance.

[0026] In this disclosure, the inlet bar screen well 6 and the pump well 5 are separated by a well wall with a water passage 18, which allows wastewater treated by the pulverizing bar 13 to enter the pump well 5. Furthermore, the diameter of the water passage 18 can be no less than 800 mm and no less than the diameter of the inlet pipe 9, thus serving as a maintenance passage between the inlet bar screen well 6 and the pump well 5. Therefore, the water passage 18 not only serves as a water flow connection but also provides a passage for maintenance personnel to carry tools into adjacent functional areas, thereby reducing the need for additional maintenance passages and improving the utilization rate of the integrated well's internal space and maintenance convenience.

[0027] Eighth, it can maintain a compact structure while ensuring structural integrity, waterproof performance, and construction adaptability.

[0028] In this disclosure, the well body can adopt a reinforced concrete monolithic cast-in-place structure or a prefabricated assembly structure, as well as various materials that can meet the structural stability requirements, such as fiberglass, which can improve the integrity and waterproof performance of the well body and reduce the leakage risk that may be caused by connecting pipes or joints between scattered well bodies. A uniform well cover can be installed on the top of the well body to reduce the number of ground openings and the impact on the landscape; the pump station operation well 2 and pump well 5 can adopt a circular or square cross-section, and the upper and lower annular spaces can be further set as annular spaces to adapt to different site conditions, construction technology and processing methods. Compared with the solution that only improves from the perspective of equipment integration or pump room platform layout, this disclosure also considers the well body space organization, hydraulic elevation connection, maintenance passage reuse and structural construction method, so as to balance land use control, construction feasibility and later maintenance convenience in different engineering scenarios.

[0029] Ninth, the comprehensive integration of "civil engineering structure + hydraulic function + maintenance operation".

[0030] The difference between this integrated well and conventional prefabricated pumping stations is that conventional prefabricated pumping stations are "equipment integration," while this well is a comprehensive integration of "civil structure + hydraulic function + maintenance operation." It compresses the six major functions of interception, sedimentation, bar screen, lifting, energy dissipation, and operation into a well made of any material that meets the structural requirements, such as concrete or fiberglass. This has significant advantages in saving land, facilitating maintenance, and protecting downstream pipelines. Attached Figure Description

[0031] Figure 1 and Figure 2 These are, respectively, top views of the upper and lower plan structures of the integrated well of the sewage lifting pump station and its ancillary facilities according to an embodiment of this disclosure;

[0032] Figure 3 and Figure 4 They are respectively Figure 1 The cross-sectional views of sections 1-1 and 2-2 in the integrated well are shown.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Control gate operating well; 2. Pump station operating well; 3. Energy dissipation well;

[0035] 4. Gate slot well; 5. Pump well; 6. Inlet bar screen well;

[0036] 7. Upper weir; 8. Lower weir; 9. Inlet pipe;

[0037] 10. Outlet pipe; 11. Pressure pipe; 12. Gate valve;

[0038] 13. Crushing bar; 14. Pressure pipe valve; 15. Submersible pump;

[0039] 16. Gate opening and closing device; 17. Pebble layer; 18. Water passage hole;

[0040] 19. First inspection hole; 20. Second inspection hole; 21. Bracket;

[0041] 22. Pump foundation; 23. Flow channel Detailed Implementation

[0042] To address the problems of large land occupation, high investment, difficult construction, and inconvenient operation and maintenance caused by the dispersed layout of gate wells, bar screen wells, pump wells, and energy dissipation wells in traditional sewage lifting pump station systems, this disclosure provides an integrated well for sewage lifting pump stations and ancillary facilities. This integrates the traditionally dispersed gate wells, bar screen wells, pump wells, energy dissipation wells, and their operating spaces into a single well body, achieving a streamlined "six-zone-in-one" design. Through rational spatial zoning and structural layout, while ensuring independent operation and convenient maintenance of each functional unit, it significantly reduces land occupation, lowers investment, shortens construction period, and improves operation and maintenance efficiency, providing a more economical, efficient, and feasible solution for the construction of sewage lifting pump stations.

[0043] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0044] In one exemplary embodiment of this disclosure, an integrated well for a sewage lifting pump station and its ancillary facilities is provided. The upstream of the integrated well is one of the following: pure rainwater, pure sewage, or mixed rainwater and sewage. Figure 1 and Figure 2 These are, respectively, top views of the upper and lower planar structures of the integrated well according to embodiments of this disclosure. Figure 3 and Figure 4 They are respectively Figure 1 The figure shows cross-sectional views of sections 1-1 and 2-2 in the integrated well. As shown, the integrated well of the sewage lifting pump station and auxiliary facilities in this embodiment includes:

[0045] The well body is internally divided into a lower space and an upper space from bottom to top;

[0046] Pump well 5 is located in the middle of the lower space and is equipped with submersible pump 15, which is connected to pressure pipe 11.

[0047] Gate slot well 4 and inlet bar screen well 6 are located in the lower annular space on the outer periphery of pump well 5. They are separated by a lower weir 8. Gate slot well 4 is connected to inlet pipe 9 and is equipped with a plate gate 12. Inlet bar screen well 6 is equipped with a crushing bar 13 and is separated from pump well 5 by a well wall with water passage holes 18.

[0048] Pump station operation well 2 is located in the middle of the upper space and above pump well 5. It is connected to pump well 5 through the second inspection hole 20. At least a section of the pressure pipe 11 is located in the pump station operation well 2, and a pressure pipe valve 14 is provided on the pipe section.

[0049] The sluice gate operating well 1 and the energy dissipation well 3 are located in the upper annular space surrounding the pump station operating well 2, and are separated by the upper weir 7. The sluice gate operating well 1 is located directly above the gate slot well 4, and is connected to the gate slot well 4 through the first inspection hole 19. It is equipped with a gate opening and closing device 16 for opening and closing the sluice gate 12. The energy dissipation well 3 is located above the inlet grid well 6. The outlet end of the pressure pipe 11 leads to the energy dissipation well 3, and the energy dissipation well 3 is connected to the outlet pipe 10.

[0050] In this embodiment, the pump well 5 is located in the middle of the lower space, the gate well 4 and the inlet bar well 6 are located in the lower annular space on the outer periphery of the pump well 5, the pump station operation well 2 is located in the middle of the upper space, and the gate operation well 1 and the energy dissipation well 3 are located in the upper annular space around the pump station operation well 2. This integrates the gate well, bar, pump well, energy dissipation well and their operation space into the same well body according to the vertical correspondence and internal and external coordination relationship.

[0051] It should be noted that the integrated well in this embodiment differs from the conventional prefabricated pumping station in that: the conventional prefabricated pumping station is an "equipment integration", while this embodiment is a comprehensive integration of "civil structure + hydraulic function + maintenance operation". It compresses the six major functions of interception, sedimentation, bar screen, lifting, energy dissipation and operation into a well made of any material that meets the structural requirements, such as concrete / fiberglass. It has significant advantages in saving land, facilitating maintenance and protecting downstream pipelines.

[0052] Furthermore, compared to the traditional arrangement of multiple dispersed wells, this disclosure can reduce the number of independent wells, inter-well connecting structures, and ground footprint. Under certain engineering implementation conditions, compared to the traditional dispersed layout, it can reduce the land area by approximately 50% to 60%, lower civil engineering investment by approximately 30% to 40%, and shorten the construction period by approximately 30%. Compared to structures that simply concentrate pumps, grates, valves, and other equipment within the cylinder or pump house, this disclosure further defines the hierarchical location and correspondence between functional wells and operating wells, thereby helping to reduce the amount of civil engineering work, shorten the construction period, and improve feasibility in urban built-up areas, narrow road areas, or areas with limited land use.

[0053] It should also be noted that in this embodiment, sewage enters the gate well 4 through the inlet pipe 9 when the gate 12 is open, crosses the lower weir 8 and enters the inlet bar screen well 6. After being treated by the crushing bar 13, it enters the pump well 5 through the water passage 18, and is then lifted by the submersible pump 15 through the pressure pipe 11 to the energy dissipation well 3, and discharged through the outlet pipe 10. Thus, the gate well 4 can cooperate with the gate 12 at the inlet end to achieve interception and preliminary sedimentation, the inlet bar screen well 6 can intercept or crush debris through the crushing bar 13, the pump well 5 can complete the sewage lifting, and the energy dissipation well 3 can receive the pumped water and dissipate energy. Compared with the arrangement of gate wells, bar screen wells, pump station wells or valve wells in a linear series, this disclosure compresses the above-mentioned water flow path into the upper and lower integrated wells, and achieves orderly connection between each functional area through the lower weir 8, water passage 18 and pressure pipe 11, which helps to reduce the complexity of the connection between wells, reduce the risk of leakage and hydraulic loss, and improve the continuity and stability of system operation.

[0054] The more specific structures and components of this embodiment will be described in detail below.

[0055] (I) Overall Structure

[0056] Overall, in this embodiment, the well body adopts a reinforced concrete integral cast-in-place or prefabricated assembly structure to ensure integrity and waterproof performance. In addition, a uniform well cover is set on the top of the well body to minimize the ground occupation and landscape impact. The functional areas are separated by the lower weir (8) and the well wall of the pump well (5), while water flow is connected through the water passage hole (18) and pressure pipe (11).

[0057] It should be noted that in this embodiment, the well body can adopt a reinforced concrete monolithic cast-in-place structure or a prefabricated assembly structure, which can improve the integrity and waterproof performance of the well body and reduce the leakage risk that may be caused by connecting pipes or joints between scattered well bodies. A uniform well cover can be installed on the top of the well body to reduce the number of ground openings and the impact on the landscape; the pump station operation well 2 and pump well 5 can adopt a circular or square cross-section, and the upper and lower annular spaces can be further set as annular spaces to adapt to different site conditions, construction technology and processing methods. Compared with the solution that only improves from the perspective of equipment integration or pump room platform layout, this disclosure also considers the well body space organization, hydraulic elevation connection, maintenance passage reuse and structural construction method, so as to balance land use control, construction feasibility and later maintenance convenience in different engineering scenarios.

[0058] It should be further explained that in this embodiment, the outer perimeter of the integrated well is circular, and the well walls of the pump station operation well 2 and pump well 5 can also be circular. Therefore, the upper and lower annular spaces are both circular. However, this disclosure is not limited to this. First, the outer perimeter of the integrated well can be circular or a regular n-sided polygon, where n≥4; second, the well walls of the pump station operation well 2 and pump well 5 can be circular or a regular n-sided polygon. Therefore, the upper and lower annular spaces can be circular, square, or irregular annular with a square inner side and a circular outer side.

[0059] (ii) Pump station operation well

[0060] The pump station operation well 2 is located on the upper layer of the integrated well. It is a cylindrical structure, located between the gate operation well 1 and the energy dissipation well 3, directly above the pump well 5, and corresponding vertically to the pump well 5. Inside, there is a submersible pump 15, a pressure pipe 11, and a pressure pipe valve 14. In addition, an inspection hole 20 is set at the bottom of the pump station operation well 2. The inspection hole is made of steel cover plate to prevent the sewage odor inside the pump well 5 from spreading into the pump station operation well 2 and affecting personnel maintenance. The above measures inside the pump station operation well 2 are used for the installation, lifting, inspection, and maintenance of the water pump in the pump well 5.

[0061] It should be noted that the bottom elevation of the gate control well 1 and the pump station control well 2 is determined by the bottom elevation (H2) of the outlet pipe 10 - 700mm.

[0062] (iii) The upper annular space and upper weir on the outer periphery of the pump station operating well

[0063] The gate control well 1 and the energy dissipation well 3 are semi-circular structures located on the upper layer of the integrated well. They are separated into two well chambers by the upper weir 7. The upper weir 7 is a concrete structure, and its top elevation is determined by the bottom elevation of the outlet pipe 10 plus the diameter of the outlet pipe 10.

[0064] (iv) Control gate operating well 1

[0065] The gate control well 1 is located in the upper left position of the integrated well and directly above the gate slot well 4, corresponding vertically to the gate slot well 4. It contains a gate opening and closing device 16 for opening, closing, and maintenance of the gate 12 within the gate slot well 4. A first inspection hole 19 is provided at the bottom of the gate control well 1 to facilitate personnel access to the gate slot well 4 for inspection and maintenance. The first inspection hole 19 is designed as a grating cover to prevent water overflow from the energy dissipation well 3 located in the upper right position of the integrated well into the gate control well 1, which would cause water accumulation and affect personnel operation. The grating cover allows wastewater overflowing from the energy dissipation well 3 to be promptly discharged into the gate slot well 4.

[0066] It is particularly important to emphasize that, in this embodiment, the first inspection hole 19 can be a grating-type inspection hole, allowing personnel to enter the gate slot well 4 from the gate operating well 1, and allowing sewage overflowing from the energy dissipation well 3 to the gate operating well 1 to be discharged into the gate slot well 4, preventing water accumulation in the gate operating well 1 from affecting personnel operation. The second inspection hole 20 can be a sealed-cover type inspection hole, with the sealed cover covering the second inspection hole 20 to prevent odor from the pump well 5 from entering the pump station operating well 2, improving the valve operation and pump maintenance environment. Compared to structures that only provide ordinary inspection holes or ordinary maintenance platforms, this disclosure allows different inspection holes to perform different safety auxiliary functions, ensuring personnel passage while also considering overflow water discharge and odor blocking, thereby improving the safety and comfort of pump station operation and maintenance.

[0067] (v) Energy dissipation well 3

[0068] The energy dissipation well 3 is located at the upper outlet end of the well body, on the outlet side of the pump well. It is used to eliminate the high flow velocity and impact energy generated by the pump's output water, effectively dissipating the kinetic energy of the output water and ensuring a smooth flow into the drainage pipe 10, thus preventing scouring damage to downstream pipes. The energy dissipation well 3 is connected to the pump well 5 via a pressure pipe 11. Inside the energy dissipation well 3, there are also 500mm high pebbles 17 for energy dissipation. Furthermore, since the pressure pipe 11 after the submersible pump 15 falls vertically onto the 500mm high pebbles 17, it needs to be secured using a bracket 21.

[0069] The bottom elevation of the energy dissipation well 3 is determined to be the bottom elevation of the outlet pipe 10 minus 1200mm. This is because the bottom of the energy dissipation well 3 is also equipped with 500mm high cobblestones 17. After raising the bottom of the energy dissipation well 3 by 500mm high cobblestones 17, it is easier for personnel to enter the gate control well 1 and then cross the upper weir 7 to enter the interior of the energy dissipation well 3.

[0070] It is particularly important to emphasize that, in this embodiment, in order to prevent excessive sludge in the triangular areas at both ends of the energy dissipation well, an annular flow channel of concrete structure 200mm higher than the bottom of the energy dissipation well (3) is provided.

[0071] It is particularly important to emphasize that in this embodiment, the energy dissipation well 3 is located in the upper annular space, and the outlet end of the pressure pipe 11 leads to the energy dissipation well 3. Furthermore, an energy dissipation packing layer can be installed inside the energy dissipation well 3, with the outlet end of the pressure pipe 11 facing the energy dissipation packing layer, or the sewage can be allowed to fall onto the pebble layer 17 for energy dissipation through a vertical pipe section. The support 21 can also fix the vertical pipe section of the pressure pipe 11. Compared to integrated pump station structures that mainly focus on inlet grilles, collection tanks, submersible pumps, valves, or operating wells, this disclosure arranges the post-pump energy dissipation space as part of the integrated well, allowing the high-velocity water flow after the pump to dissipate energy within the well before entering the outlet pipe 10. This helps to reduce the impact of the outflow, lower the risk of scouring downstream pipes and inspection well structures, and improve the structural stability of the pressure pipe 11 under the condition of falling water discharge.

[0072] (vi) Pump well

[0073] Pump well 5 is located in the lower middle area of ​​the well body. It is a cylindrical structure and houses a submersible pump to lift sewage to a higher elevation. A pump foundation 22 is located at the bottom of the pump well to fix the pump and ensure its normal operation.

[0074] The elevation of the bottom of pump well 5 is determined by the characteristic water level of the water pump, and can generally be determined by the elevation of the bottom of inlet pipe 9 (H1) - 500mm - 2 water level at pump start-up - water level at pump stop. However, it needs to meet the relevant specifications.

[0075] (vii) The lower annular space and lower weir on the outer periphery of the pump well

[0076] Both the gate well 4 and the inlet bar well 6 are semi-circular structures, separated by a complete circular structure by the lower weir 8, forming two well chambers. The height of the lower weir 8 is determined by the bottom elevation (H1) of the inlet pipe 9.

[0077] (viii) Gate slot well 4

[0078] The gate slot well 4 is located at the lower water inlet end of the well body and at the front end of the water inlet grille well 6. It has a semi-circular structure and contains a plate gate 12 with the same diameter as the water inlet pipe 9. This gate gate is used to cut off the water supply during pump station maintenance or malfunction, ensuring the safety of maintenance operations. The gate slot well and the water inlet grille well 6 are connected by a water passage hole 18. The bottom elevation of the gate slot well 4 is determined by the bottom elevation (H1) - 500mm of the water inlet pipe 9.

[0079] The diameter of the water passage hole 18 is not less than DN800 and not less than the diameter of the water inlet pipe 9, and is used for personnel to enter and exit for maintenance between the pump well 5 and the water inlet grid well 6.

[0080] It is particularly important to emphasize that in this embodiment, the inlet bar screen well 6 and the pump well 5 are separated by a well wall with a water passage 18. The water passage 18 allows wastewater treated by the pulverizing bar screen 13 to enter the pump well 5. Furthermore, the diameter of the water passage 18 can be no less than 800mm and no less than the diameter of the inlet pipe 9, so that it also serves as a maintenance passage between the inlet bar screen well 6 and the pump well 5. Thus, the water passage 18 not only serves the function of water flow connection, but also provides a passage for maintenance personnel to carry tools into adjacent functional areas, thereby reducing the need for additional maintenance passages and improving the utilization rate of the internal space of the integrated well and the convenience of maintenance.

[0081] (ix) Water inlet bar screen well 6

[0082] The inlet bar screen 6 is located at the bottom of the well body and has a shredder 13 installed inside to intercept smaller debris carried in the sewage and prevent it from entering the subsequent pumping equipment. The lower weir 8 set in front of the inlet bar screen 6 not only separates the gate well 4, but also guides the sewage to flow faster into the subsequent pump well 5.

[0083] The bottom elevation of the water inlet grid well 6 is determined by the bottom elevation of the water inlet pipe 9 - 500mm.

[0084] (x) Elevation setting

[0085] It is particularly important to emphasize that, in this embodiment, the bottom elevations of the gate operating well 1 and the pump station operating well 2 can be determined based on the bottom elevation of the outlet pipe 10. The bottom elevation of the energy dissipation well 3 can be lower than that of the gate operating well 1 and the pump station operating well 2. Furthermore, the operating surface within the energy dissipation well 3 can be raised to be level with or nearly level with the bottom of the gate operating well 1 using a pebble layer 17, allowing personnel to smoothly enter the energy dissipation well 3 from the gate operating well 1 for cleaning or maintenance. The bottom elevations of the gate slot well 4 and the inlet bar well 6 can be determined based on the bottom elevation of the inlet pipe 9. The bottom elevation of the pump well 5 can be lower than that of the gate slot well 4 and the inlet bar well 6, and is determined based on the start-up and stop-down water levels of the submersible pump 15. Therefore, this disclosure can balance the connection of the upper operating surfaces, the formation of the lower sedimentation space, the effective water depth of the pump well, and the pump operating conditions, thus coordinating the structural layout, hydraulic conditions, and personnel access requirements.

[0086] (xi) Standard requirements

[0087] Those skilled in the art should understand that, in this embodiment, the number of water pumps, the water accumulation volume, and the water pump inlet conditions must all meet the corresponding specifications.

[0088] The following describes the sewage flow direction and maintenance process of the integrated well of the sewage lifting pump station and its auxiliary facilities in this embodiment.

[0089] During normal operation of the sewage system, the sewage first flows through the inlet pipe 9 and the open gate 12 into the gate well 4. Impurities in the sewage settle in the 500mm space at the bottom of the gate well 4, which serves as the first interception of pollutants for the submersible pump 15. The relatively clear sewage flows in both upward and downward directions in the gate well 4. After flowing to the lower weir 8, water and sediment begin to accumulate. When the sewage reaches a certain depth, it overflows through the top of the lower weir 8 and enters the inlet screen well 6. The internal crushing screen 13 further intercepts and crushes the impurities carried in the sewage. The even clearer sewage passes through the crushing screen 13 and the water passage 18 into the pump well 5. After being lifted by the submersible pump 15, it enters the energy dissipation well 3 through the pressure pipe 11 and is dissipated by 500mm high pebbles 17 before finally being smoothly connected to the drain pipe 10.

[0090] The operating procedure during pump maintenance is as follows: When submersible pump 15 malfunctions, personnel first enter the gate control well 1 to close the gate 12, blocking the sewage in the inlet pipe 9. Then, personnel enter the pump station control well 2 to close the pressure valve 14 to prevent sewage backflow and further damage to submersible pump 15. After completing these steps, personnel enter the pump well 5 through the inspection hole 20 inside the pump station control well 2 to repair submersible pump 15. Additionally, if equipment inside the energy dissipation well 3 and the inlet bar well 6 is damaged, personnel enter the internal operating space for convenient operation and maintenance.

[0091] It is particularly important to emphasize that in this disclosure, the gate control well 1 is located above the gate slot well 4 and is connected to the gate slot well 4 through the first inspection hole 19; the pump station control well 2 is located above the pump well 5 and is connected to the pump well 5 through the second inspection hole 20; the pressure pipe valve 14 is installed on the pressure pipe 11 section inside the pump station control well 2. Therefore, during pump maintenance or troubleshooting, maintenance personnel can first close the gate 12 in the gate control well 1 using the gate opening and closing device 16, then close the pressure pipe valve 14 in the pump station control well 2, and subsequently enter the pump well 5 through the second inspection hole 20 to maintain the submersible pump 15. Compared to structures that only provide an upper platform, maintenance room, or hoisting maintenance layer, this disclosure does not simply provide space for personnel to stand or for equipment hoisting, but rather arranges the upper control wells and lower functional wells according to the equipment maintenance objects, thereby reducing the need for maintenance personnel to travel between multiple dispersed wells, shortening the maintenance operation path, and improving maintenance organization efficiency.

[0092] In the second exemplary embodiment of this disclosure, another integrated well is provided. This embodiment is more detailed and more implementable than the first embodiment. Certain contents that are the same as in the first embodiment will not be repeated here. If necessary, please refer to the relevant description of the first embodiment.

[0093] This embodiment describes an integrated well for a sewage booster pumping station in a suburban area of ​​a city. The area where the sewage booster pumping station is located is a village redevelopment zone with narrow surrounding roads and severely limited construction space, making it difficult to implement using traditional decentralized pumping station auxiliary facilities.

[0094] (1) Project background and design parameters

[0095] The pumping station serves an area of ​​approximately 3 square kilometers in the suburbs, with a population of about 45,000, and is designed to handle sewage flow rates of [missing information]. The design head is H=12m. The inlet pipe is a DN400 reinforced concrete pipe with a bottom elevation of -2.50m (relative elevation); the outlet pipe is a DN300 ductile iron pipe with a bottom elevation of +3.20m (relative elevation). According to traditional design schemes, separate gate wells, bar screen wells, pump wells, and energy dissipation wells need to be constructed, with an estimated land area of ​​approximately... The civil engineering investment is approximately 1.5 million yuan, and the construction period is approximately 3.5 months. Due to limited construction space, traditional solutions are difficult to implement, so the integrated well solution disclosed in this paper is adopted.

[0096] (2) Integrated well structure design

[0097] Based on the design parameters, an integrated well was designed. The well body adopts a reinforced concrete monolithic cast-in-place structure, with an external planar dimension of 5.5m × 5.0m and a depth of 9.0m. The specific design of each functional area is as follows:

[0098] Upper functional area:

[0099] Gate control well 1: Located on the upper left of the integrated well, it has a semi-circular ring structure with an inner radius of 2.0m, net dimensions of approximately 2.0m × 2.5m, and a depth of 2.2m. It houses a manual screw-type gate opening and closing device 16 with an opening and closing force of 3t. A DN800 grating cover-type inspection hole 19 is provided at the bottom, allowing personnel to access the lower gate slot well 4. The grating cover has a grating gap of 20mm × 20mm, effectively draining overflow water from the energy dissipation well 3.

[0100] Pump station operating well 2: Located in the middle of the upper layer of the integrated well, it is a cylindrical structure with an inner diameter of 1.8m and a depth of 2.5m. It contains a pressure pipe valve 4 (DN150 stainless steel gate valve) and lifting guide rails. A DN800 steel cover plate inspection hole 20 is provided at the bottom. The steel cover plate is 8mm thick and surrounded by a rubber sealing ring to effectively prevent the spread of odor from the pump well 5.

[0101] Energy dissipation well 3: Located on the upper right layer of the integrated well, symmetrically arranged with the gate control well 1, both being semi-circular ring structures, with net dimensions of approximately 2.0m × 2.5m and a depth of 1.8m. The interior is paved with 500mm thick cobblestones 17, with a particle size of 30~50mm. The pressure pipe 11 falls vertically to the cobblestone layer and is fixed by a stainless steel bracket 21.

[0102] Upper weir 7: Concrete structure, 200mm thick, top elevation = bottom elevation of outlet pipe + outlet pipe diameter = 3.20m + 0.30m = 3.50m.

[0103] Elevation of the bottom of the upper well: The bottom elevation of both the gate operating well 1 and the pump station operating well 2 = bottom elevation of the outlet pipe - 0.70m = 3.20m - 0.70m = 2.50m; The bottom elevation of the energy dissipation well 3 = bottom elevation of the outlet pipe - 1.20m = 3.20m - 1.20m = 2.00m. After raising the elevation by 500mm of cobblestones, the elevation of the internal operating surface of the energy dissipation well 3 is 2.50m, which is level with the bottom of the gate operating well 1, facilitating personnel to cross the upper weir 7 for passage.

[0104] Lower functional area:

[0105] Gate Slot Well 4: Located at the lower inlet end of the integrated well, it is a semi-circular ring structure with net dimensions of 2.0m × 2.5m and a depth of 3.2m. It houses a DN400 stainless steel gate 12 with a matching gate slot. A 500mm sedimentation space is provided at the bottom. The bottom elevation of Gate Slot Well 4 = Inlet pipe bottom elevation (H1) - 0.50m = -2.50m - 0.50m = -3.00m.

[0106] Intake Bar Screen Well 6: Located after Gate Slot Well 4, it also has a semi-circular ring structure, with net dimensions of 2.0m × 2.5m and a depth of 3.2m. It houses a pulverizing bar screen 13 with a power of 2.2kW, a processing capacity of 1200m³ / d, and a screen gap of 6mm. The bottom elevation of the well is also -3.00m.

[0107] Lower weir 8: Separates gate well 4 and inlet bar screen well 6. The weir crest elevation is determined to be -2.20m by hydraulic calculation, ensuring that sewage can effectively settle in gate well 4 before overflowing into inlet bar screen well 6.

[0108] Water passage 18: Located between the water inlet screen well 6 and the pump well 5, with a diameter of DN800, allowing personnel to enter the pump well 5 for maintenance.

[0109] Pump Well 5: Located in the middle of the lower part of the integrated well, it is a cylindrical structure with an inner diameter of 2.2m. The depth is determined by water level calculation based on pump characteristics. The bottom elevation of the inlet pipe is -2.50m, the pump start-up water level is -3.00m, and the pump stop-up water level is -3.80m. The bottom elevation of Pump Well 5 (H3) = -2.50m - 0.50m - 2 × (-3.00m + 3.80m) = -3.00m - 1.60m = -4.60m. A C30 concrete pump foundation 22 is installed at the bottom of Pump Well 5, housing two submersible sewage pumps 15 (one for operation and one for standby). Each pump has a flow rate Q = 60m³ / h, a head H = 12m, and a power of 4.0kW.

[0110] (3) Execution process verification

[0111] After the pumping station is put into operation, the operation process is as follows:

[0112] During normal operation: Wastewater enters through the DN400 inlet pipe 9 and flows into the gate well 4 via the open DN400 gate 12. Larger impurities in the wastewater undergo initial sedimentation in the 500mm sedimentation space, while clearer wastewater overflows the lower weir 8 and enters the inlet screen well 6. After being pulverized by the crushing screen 13, it flows into the pump well 5 through the DN800 through-hole 18. The submersible pump 15 lifts the wastewater to the outlet pipe elevation, and it falls vertically through the DN150 pressure pipe 11 into the energy dissipation well 3, where it is dissipated by 17 layers of 500mm thick pebbles. The flow velocity decreases from approximately 3.2m / s to approximately 0.6m / s, and finally, it smoothly connects to the downstream gravity flow network through the DN300 outlet pipe 10. Operational monitoring shows no obvious signs of scouring in the downstream pipeline.

[0113] During maintenance: Maintenance personnel first enter the gate control well 1 and close the gate 12 using the gate opening and closing device 16 to block the water inlet pipe; then they enter the pump station control well 2 and close the pressure pipe valve 14; finally, they enter the pump well 5 through the maintenance hole (20) to perform pump maintenance. The entire operation requires only 2 maintenance personnel and takes about 15 minutes to complete the pump replacement. When cleaning the pebbles in the energy dissipation well 3, personnel can easily enter by climbing over the upper weir 7 from the gate control well 1.

[0114] (5) Validation of innovative structures

[0115] This embodiment verifies several innovative structures of this disclosure:

[0116] Inspection hole 19 of the bar screen: When the instantaneous flow of sewage is large upstream, the pump is under high load, and the downstream drainage is not smooth, the instantaneous sewage flow is large. The overflow sewage is discharged into the gate slot well 4 in time through the bar screen. No water accumulation occurs in the gate operation well 1, ensuring the safety of personnel operation.

[0117] Energy dissipation of pebbles 17: After the high-velocity water flow falling vertically through the pressure pipe 11 impacts the pebble layer, the kinetic energy is effectively dissipated, and no abnormal vibration or scouring is detected in the downstream outlet pipe (10).

[0118] The design of the upper and lower weirs: The upper weir (7) has a top elevation of 3.50m and the lower weir (8) has a top elevation of -2.20m, which ensures the connection of water levels in each functional area and the convenience of personnel passage.

[0119] (6) Value for promotion and application

[0120] This embodiment fully demonstrates the significant advantages of this disclosure in terms of saving land, reducing investment, shortening construction period, and improving operation and maintenance efficiency. This integrated well is suitable for the construction and renovation of various drainage lifting pump stations, especially in complex environments such as urban built-up areas, areas with limited land, and restricted construction space.

[0121] This concludes the description of the various embodiments of this disclosure. Based on the above description, those skilled in the art should have a clear understanding of this disclosure.

[0122] It should be noted that for some implementation methods, if they are not key contents of this disclosure and are well known to those skilled in the art, they are not described in detail in the accompanying drawings or text due to space limitations. In such cases, relevant prior art can be referred to for understanding.

[0123] Unless explicitly stated otherwise, the numerical values ​​and ranges mentioned in this disclosure are approximate and can be changed according to the content of this disclosure. Specifically, all figures in the specification and claims indicating composition, reaction conditions, etc., should be understood to be modified by the term "about" in all cases, meaning that they include variations of ±10% in certain embodiments.

[0124] The directional terms used in this disclosure, such as "center," "lateral," "longitudinal," "top," "bottom," "upper," "lower," "front," "rear," "left," "right," "inner," and "outer," indicate orientations or positional relationships based solely on the orientations or positional relationships shown in the accompanying drawings. These terms are used only for the convenience of describing this disclosure and for simplification, 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. Therefore, they should not be construed as limitations on this disclosure. Furthermore, throughout the accompanying drawings, the same elements are represented by the same or similar reference numerals. Also, the shapes and dimensions of the components in the drawings do not reflect actual size and proportion, but are only schematic representations of embodiments of this disclosure.

[0125] Those skilled in the art will understand that in the claims and specification of this disclosure, the word "comprising" does not exclude the presence of elements (or steps) not listed in the claims. The word "a" or "an" preceding an element (or step) does not exclude the presence of a plurality of such elements (or steps).

[0126] Furthermore, the above embodiments are provided only to enable this disclosure to meet legal requirements, and this disclosure may be implemented in many different forms and should not be construed as limited to the embodiments set forth herein.

[0127] Similarly, it should be understood that, for the sake of brevity, in the foregoing description of exemplary embodiments of this disclosure, various features of this disclosure are sometimes grouped together in a single embodiment, figure, or description thereof. However, this approach to disclosure should not be construed as reflecting an intention that the claimed disclosure requires more features than are expressly recited in each claim. Rather, as reflected in the claims, each aspect of the disclosure comprises fewer than all the features of the preceding single embodiment. Furthermore, embodiments may be used in combination with each other or with other embodiments based on design and reliability considerations; that is, technical features from different embodiments can be freely combined to form more embodiments. Therefore, the claims following the detailed description are hereby expressly incorporated into that detailed description, wherein each claim itself is a separate embodiment of this disclosure.

[0128] The above specific embodiments have provided a detailed description of the purpose, technical means, and beneficial effects of this disclosure. It should be understood that the purpose of the detailed description is to enable those skilled in the art to understand this disclosure more clearly, and it is not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. An integrated well for a sewage lifting pump station and its auxiliary facilities, characterized in that, include: The well body is internally divided into a lower space and an upper space from bottom to top; Pump well (5) is located in the middle of the lower space and is equipped with submersible pump (15). Submersible pump (15) is connected to pressure pipe (11). The gate slot well (4) and the inlet bar screen well (6) are located in the lower annular space on the outer periphery of the pump well (5). They are separated by a lower weir (8). The gate slot well (4) is connected to the inlet pipe (9) and is equipped with a plate gate (12). The inlet bar screen well (6) is equipped with a crushing bar (13) and is separated from the pump well (5) by a well wall with a water passage hole (18). The pump station operation well (2) is located in the middle of the upper space and above the pump well (5). It is connected to the pump well (5) through the second inspection hole (20). At least part of the pressure pipe (11) is located in the pump station operation well (2), and a pressure pipe valve (14) is provided on the pipe section. The sluice gate operating well (1) and the energy dissipation well (3) are located in the upper annular space outside the pump station operating well (2), and are separated by an upper weir (7). The sluice gate operating well (1) is located above the gate slot well (4), and is connected to the gate slot well (4) through the first inspection hole (19), and is equipped with a gate opening and closing device (16) for opening and closing the sluice gate (12). The energy dissipation well (3) is located above the inlet grid well (6), and the outlet end of the pressure pipe (11) is connected to the energy dissipation well (3), and the energy dissipation well (3) is connected to the outlet pipe (10). In this process, sewage enters the gate well (4) through the inlet pipe (9) when the gate (12) is open, passes over the lower weir (8) and enters the inlet grid well (6), and flows through the crushing grid (13), water passage hole (18), pump well (5), pressure pipe (11), energy dissipation well (3) and outlet pipe (10).

2. The integrated well according to claim 1, characterized in that, The upper weir (7) is set in the upper annular space and separates the upper annular space into the gate operating well (1) and the energy dissipation well (3). The top elevation of the upper weir (7) is: the bottom elevation of the outlet pipe (10) + the pipe diameter of the outlet pipe (10). The lower weir (8) is set in the lower annular space and separates the lower annular space into the gate well (4) and the inlet grid well (6). The top elevation of the lower weir (8) is H1, which is the bottom elevation of the inlet pipe (9).

3. The integrated well according to claim 1, characterized in that, An energy dissipation packing layer is provided inside the energy dissipation well (3), and the outlet end of the pressure pipe (11) is set towards the energy dissipation packing layer; At least a portion of the vertical section of the pressure pipe (11) is fixed inside the energy dissipation well (3) by a bracket (21).

4. The integrated well according to claim 3, characterized in that, The energy dissipation filler layer is a cobblestone layer (17) laid at the bottom of the energy dissipation well (3). The pressure pipe (11) includes: a vertical pipe section; The vertical pipe section is located inside the energy dissipation well (3), and the lower end outlet of the vertical pipe section faces the pebble layer (17) so that the sewage lifted by the pressure pipe (11) is pressurized and falls into the pebble layer (17) for energy dissipation; The bracket (21) is connected to the wall of the energy dissipation well (3) and fixes the vertical pipe section.

5. The integrated well according to claim 4, characterized in that, The bottom elevation of the gate operating well (1) and the pump station operating well (2) is higher than the bottom elevation of the energy dissipation well (3); The upper surface of the cobblestone layer (17) is flush or substantially flush with the bottom of the gate operating well (1) to form a passageway for personnel to enter the energy dissipation well (3) from the gate operating well (1).

6. The integrated well according to claim 1, characterized in that, The first inspection hole (19) is a grating cover type inspection hole, which is located at the bottom of the gate operating well (1) and is used to connect the gate operating well (1) and the gate slot well (4); a grating cover plate is provided on the grating cover type inspection hole. The second inspection hole (20) is a sealed cover plate type inspection hole. The sealed cover plate type inspection hole is located at the bottom of the pump station operation well (2) and is used to connect the pump station operation well (2) and the pump well (5). The sealed cover plate type inspection hole is covered with a sealed cover plate.

7. The integrated well according to claim 6, characterized in that, The grating cover of the first inspection hole (19) is used to allow personnel to enter the gate slot well (4) and to allow sewage overflowing from the energy dissipation well (3) to the gate operation well (1) to be discharged into the gate slot well (4). The sealing cover of the second inspection hole (20) is a steel cover plate. The steel cover plate covers the second inspection hole (20) and is used to prevent the odor in the pump well (5) from entering the pump station operating well (2). A sealing element is provided between the steel cover plate and the periphery of the second inspection hole (20).

8. The integrated well according to claim 1, characterized in that, The diameter of the water passage (18) is not less than 800 mm and not less than the diameter of the water inlet pipe (9); The water passage (18) also serves as a maintenance channel between the water inlet grid well (6) and the pump well (5).

9. The integrated well according to claim 1, characterized in that, The bottom of the gate slot well (4) and the bottom of the inlet grid well (6) are both lower than the bottom of the inlet pipe (9); The top of the lower weir (8) is higher than the bottom of the gate well (4) and the bottom of the inlet grid well (6) so as to form a sedimentation space at least at the bottom of the gate well (4) and allow sewage to accumulate in the gate well (4) before passing over the lower weir (8) and entering the inlet grid well (6).

10. The integrated well according to any one of claims 1 to 9, characterized in that, The well body is a monolithic cast-in-place reinforced concrete structure or a precast assembled structure; and / or... A uniform well cover is installed on the top of the well body; and / or, The cross-sections of the pump station operating well (2) and the pump well (5) are circular or regular n-sided, where n ≥ 4; and / or, The cross-section of the well body is circular or a regular n-sided polygon, where n ≥ 4; and / or, Both the upper annular space and the lower annular space are circular annular spaces; and / or, The bottom elevations of the gate operating well (1) and the pump station operating well (2) are determined based on the bottom elevation of the outlet pipe (10); and / or, The bottom elevation of the energy dissipation well (3) is lower than the bottom elevation of the gate operating well (1) and the pump station operating well (2); and / or, The bottom elevations of the gate slot well (4) and the inlet bar well (6) are determined based on the bottom elevation of the inlet pipe (9); and / or, The bottom elevation of the pump well (5) is lower than the bottom elevation of the gate well (4) and the inlet grid well (6), and is determined based on the start-up and stop-up water levels of the submersible pump (15); and / or, A pump foundation (22) is provided at the bottom of the pump well (5), and the submersible pump is installed on the pump foundation. The pump foundation is used to keep the suction port of the submersible pump below a preset submersion depth; and / or, The pump station operating well (2) is equipped with lifting guide rails or lifting auxiliary structures for hoisting the submersible pump; and / or, The upstream of the integrated well is one of the following: pure rainwater, pure sewage, or mixed rainwater and sewage; and / or, Flow channels are provided in the triangular areas at both ends of the energy dissipation well. These flow channels are concrete structures higher than the bottom of the energy dissipation well; and / or, The number of submersible pumps, the water storage capacity, and the water inlet conditions of the pumps must all meet the relevant specifications.

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