An intelligent rainwater storage pumping station and its storage method

Abstract

The present invention discloses an intelligent rainwater pumping station and its storage method. The station comprises a main structure and ancillary facilities. The main structure includes four functional layers: a water discharge storage layer located on the first basement level, a water discharge retention layer located on the second basement level, a rainwater pumping station layer located on the third basement level, and a bottom silo located on the fourth basement level. The ancillary facilities include above-ground buildings. The water discharge storage layer temporarily stores and performs primary storage for non-initial rainwater; the water discharge retention layer stores and performs secondary storage for non-initial rainwater; the rainwater pumping station layer filters and stores non-initial rainwater; and the bottom silo collects initial rainwater, which is then discharged into a sewage pipeline after sedimentation. This intelligent classification of initial and non-initial rainwater into sewage and rainwater is achieved. Compared with existing technologies, the present invention rationally controls the opening of upstream rainwater discharge, achieves secondary storage and staggered discharge of rainwater, reduces energy consumption, and extends staggered storage time.

Description

Technical Field

[0001] The present invention relates to a rainwater pumping station, and in particular to a rainwater pumping station system capable of realizing an intelligent regulation and storage function and a regulation and storage method thereof. Background Art

[0002] The vast majority of rainwater pumping stations currently in normal use and have been in use for many years only have the function of collecting rainwater, pumping it up, and then discharging it (to natural water bodies). They do not have the function of peak-shaving and storage (the reason is: these pumping stations do not have storage tanks);

[0003] Some newly built rainwater pumping stations with storage and regulation functions in recent years include rainwater storage tanks, which can complete the storage and regulation functions. They are generally divided into two types: "front storage" and "rear storage". The so-called "front storage" means that the upstream rainwater first flows into the storage tank by gravity (so the front storage tank is generally deeper). After the storage tank collects a sufficient volume of water (the water storage time is also known as the "off-peak" time), it is lifted by the water pump and discharged (to the natural water body). The storage tank and the main structure of the water pump can be built together or separately. The combined construction means that the pump station level is placed above the storage tank, which is relatively space-saving. The so-called "rear storage" means that the upstream rainwater first flows into the main body of the pump station. After being lifted by the water pump, it is not discharged directly, but discharged to the rear (outlet) storage tank. After this storage tank is full (the water storage time is also known as the "off-peak" time), it is discharged (to the natural water body). The main structure of the water pump and the regulating storage tank of the rear regulating storage pump station are generally set separately. Since the water discharge from the rear regulating storage tank is also through gravity flow, its depth is limited. In order to ensure the regulating storage effect (that is, the regulating storage tank has sufficient volume), the area can only be increased, so it occupies a relatively large area.

[0004] The common disadvantages of rainwater pumping stations with storage and regulation functions in the existing technology include being restricted by the setting of water inlet at one end and water outlet at the other end of conventional rainwater pumping stations. The inlet and outlet pipes near the pumping station usually need to be equipped with turning wells to adjust the direction of the pipes (to connect the upstream pipes and the downstream discharge to natural water bodies). The pipe turns require additional land and a small amount of additional investment; if the regulating and storage tank is set up separately, it will need to occupy a larger area; the disadvantages of the existing technology "front regulation and storage" rainwater pumping station (combined construction) are: since the front regulating and storage tank is under the main structure of the pumping station, in order to meet a certain regulation and storage effect (i.e., the volume of the regulating and storage tank), it is bound to have a larger area (occupying a larger area) or a deeper net height (so that the overall depth of the combined structure is deeper), resulting in a large overall project volume and high cost; the disadvantages of the existing technology "post-regulation and storage" rainwater pumping station (combined construction) are: since the "post-regulation and storage" is to store water at a high position after being lifted by the water pump, its elevation is limited. In order to ensure the volume of the regulating and storage tank, the net area can only be further increased, resulting in a larger area occupied. Summary of the Invention

[0005] In view of the limitations of the above existing technologies, the present invention aims to propose an intelligent rainwater pumping station and a storage method thereof, which utilizes the interconnection of various functional layers to complete the intelligent storage and regulation of water intake and drainage of the rainwater pumping station.

[0006] The present invention is achieved by utilizing the following technical solutions:

[0007] An intelligent rainwater pumping station for regulation and storage includes a main structure and ancillary facilities. The main structure is arranged below the ground surface and comprises four functional layers from shallow to deep: a water discharge regulation layer located on the first underground floor, a water discharge retention layer located on the second underground floor, a rainwater pumping station layer located on the third underground floor, and a bottom silo located on the fourth underground floor. The ancillary facilities include above-ground buildings.

[0008] The outlet water storage layer is used for temporary storage and primary storage of non-initial rainwater;

[0009] The water retention layer is used for storing non-initial rainwater and secondary regulation;

[0010] The rainwater pumping station layer is used for filtering and storing non-initial rainwater;

[0011] The bottom bin is used to collect initial rainwater, which is then discharged into the sewage pipe after sedimentation treatment.

[0012] A method for regulating and storing rainwater in an intelligently regulated rainwater pumping station, wherein initial rainwater and non-initial rainwater are discharged as sewage and rainwater respectively, is characterized in that the method comprises the following processes:

[0013] After preliminary filtration, the upstream rainwater flows into the rainwater pumping station layer, flows through the spaced openings at the bottom of the circular flow inlet tank arranged in a symmetrical manner around the center of the outermost circle, and then flows into the bottom tank;

[0014] After the bottom silo is full, the subsequent inflow of rainwater flows into the main pump water collection area of ​​the rainwater pump station layer through the side openings located on the inner wall of the circulation water inlet silo. The diameter and depth of the main structure of the rainwater pump station are adjusted so that the volume of the bottom silo is equivalent to the peak volume of the initial rainwater, so that the initial rainwater is collected and discharged as sewage. After the rainwater pump station layer is full, it is lifted by the rainwater lifting main pump to the outlet water storage layer, where it is temporarily stored and regulated once, and the rainwater is stored in the storage tank on the first negative layer.

[0015] After the rainwater is filled in the storage tank on the first underground floor, it flows down into the outlet water retention layer through the overflow funnel set up in the outlet water storage layer. The storage tank on the second underground floor of the outlet water retention layer continues to store rainwater to achieve secondary storage. At this time, the outlet water storage layer is full of water.

[0016] The controllable external discharge gate set in the outlet storage layer is connected to the outlet pipe, and the external discharge gate is opened according to the downstream water discharge situation;

[0017] The water stored in the negative second floor regulating and storage tank located in the water outlet retention layer is lifted by the auxiliary lifting pump installed on this floor and discharged into the external discharge pipe connected to the water outlet regulating and storage layer, or connected to a special pipe for use as water for surrounding water bodies or greening irrigation.

[0018] Compared with the prior art, the present invention can achieve the following positive technical effects:

[0019] 1. Reasonable control of the opening of upstream rainwater discharge to achieve rainwater storage and staggered discharge;

[0020] 2. Reduced energy consumption;

[0021] 3. The peak-shaving and storage time has been extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of an intelligent rainwater storage pumping station according to the present invention;

[0023] Figure 2 This is a schematic diagram of the plan structure of the rainwater pumping station layer.

[0024] Reference numerals:

[0025] 1. Water inlet grille, 2. Sewage pump, 3. 7. Circulating water inlet tank, 41-44. Main pump water collection area, 51-52. Overflow funnel, 61-64. Rainwater lifting main pump, 8. Auxiliary lifting pump, 9. Water outlet, 11. 12. Water inlet, 13. Water outlet, 14. Ancillary facilities, 15. Ground surface, 16. Overflow pipe, 18. External discharge gate, 19. Outlet storage layer, 20. Outlet retention layer, 21. Rainwater pump station layer, 22. Bottom bin, 231, 232, interval openings, 241, 242, side openings, 25. B1 storage tank, 26. B2 storage tank, 211-214, water inlet pipe, 221-224, water inlet gate well. DETAILED DESCRIPTION

[0026] The technical solution will be clearly described below with reference to the accompanying drawings and embodiments.

[0027] like Figure 1 The figure shows a schematic diagram of the surface structure of an intelligent rainwater pump station according to the present invention.

[0028] The present invention provides an intelligent rainwater pump station with storage and regulation, comprising a main structure (underground structure) and auxiliary facilities. The main structure is located below the surface and is divided into four layers from shallow to deep, including a water storage layer 19 located on the first basement level, a water retention layer 20 located on the second basement level, a rainwater pump station layer 21 located on the third basement level, and a bottom silo 22 located on the fourth basement level. Each layer is surrounded by an overflow pipe 16. The structure of each layer is described in detail as follows:

[0029] The outlet water storage layer 19 is located on the first basement level. It is equipped with overflow hoppers 51 and 52 and a first-basement storage tank 25. The overflow hoppers 51 and 52 ensure that water lifted from the second basement level by the rainwater lifting main pumps 61-64 is first stored on the first basement level. The first-basement storage tank 25 is the internal space of the outlet water storage layer 19. The overflow hoppers 51 and 52 are installed at the junction of the outlet water storage layer 19 and the outlet water retention layer 20. The outlet water storage layer provides temporary storage and primary regulation of rainwater.

[0030] The water retention layer 20 is located on the second-basement floor and is equipped with an auxiliary lift pump 8 and a second-basement storage tank 26. The auxiliary lift pump 8 is installed at the junction of the water retention layer 19 and the water retention layer 20. The second-basement storage tank 26 is the internal space of the water retention layer 20. The water retention layer continues to store rainwater for secondary storage.

[0031] After the drainage gate 18 is opened, the outflow water 9 flows by gravity to the outflow regulating layer 19. When the outflow regulating layer 19 is almost full, it flows through the overflow funnels 51 and 52 to the outflow retention layer 20. Therefore, the overflow funnels 51 and 52 ensure that the outflow regulating layer 19 is full as soon as the basement level 2 begins to collect water. The collected water in the outflow regulating layer 19 is discharged using the auxiliary lift pump 8. This design maximizes the use of space for water storage while minimizing secondary energy consumption.

[0032] The rainwater pump station layer 21 is located on the third floor below ground level. The outermost ring of the layer is provided with circulating water inlet tanks 3 and 7, which are arranged symmetrically around the center of the layer. The inner and outer main pump water collection areas 41 to 44 are arranged symmetrically around the center of the layer in the inner ring of the layer, and the rainwater lifting main pumps 61 to 64 are located in the center of the layer. Spaced openings 231 and 232 are provided at the bottom of the circulating water inlet tanks 3 and 7, and side openings 241 and 242 are provided at a certain height on the inner wall of the circulating water inlet tank 3.

[0033] The rainwater pumping station layer 21 is the main body of the pumping station. The incoming water 11 and 12 flows into the outermost ring-shaped inlet tanks 3 and 7. This inflow is "upstream rainwater," which refers to rainwater collected from rainwater grates on roads and streets within a certain area and then passed through the rainwater pipe system. Upstream rainwater flows through the spaced openings 231 and 232 at the bottom of the ring-shaped inlet tanks 3 and 7 and into the bottom tank 22. Once the bottom tank 22 is full, it flows through the side openings 241 and 242 located at a certain height on the inner walls of the ring-shaped inlet tanks 3 and 7 into the main pump water collection area 4 of the rainwater pumping station layer 21, achieving rainwater lifting.

[0034] The bottom bin 22 is located on the fourth floor below ground level, and a funnel-shaped bottom plate is provided on the floor. A sewage pump 12 is provided at the deepest part in the center of the bottom plate.

[0035] The following is an introduction in order: upstream rainwater - flowing into the pumping station - rainwater lifting and discharge.

[0036] In the rainwater pumping station layer 21, the water inlet pipes 211 to 214 located upstream are gravity flow pipes that receive all upstream rainwater in this area. Therefore, the rainwater pumping station layer 21 is generally located at a certain depth below the ground surface 15 (such as 5-10 meters below the ground surface), and the water inlet pipes 211 to 214 are connected to the water inlet wells 221 to 224. In the early stage of rainfall, upstream rainwater often contains road oil and various debris. According to the requirements of water quality classification and discharge, the initial rainwater is treated as sewage and discharged to the sewage treatment plant station through the sewage pipe. The upstream water is first preliminarily filtered through the water inlet grille 1 attached to the water inlet wells 221 to 224, and flows into the circulation water inlet tank 3 located in the outermost circle of the rainwater pumping station layer 21 as inlet water, and flows into the bottom tank 22 located on the negative fourth floor through the spaced openings 231 and 232 set on the bottom surface of the circulation water inlet tank 3. After the bottom tank 22 is filled with water, it flows into the main pump water collection area 4 of the rainwater pump station layer 21 through the side openings 241 and 242 located on the inner wall of the circulation water inlet tank 3. Adjust the diameter and depth of the main structure of the rainwater pump station: First, determine the total volume of the storage tank (i.e., storage capacity) V according to the current status of the regional rainwater pipe network and the short-term and long-term planning; then determine the total volume of initial rainwater (i.e., the total volume that needs to be discharged as sewage) V according to the regional catchment area and the initial rainwater discharge time. 初 Theoretically, the sum of the volumes of the four underground floors of the rainwater pumping station should be slightly larger than the total volume of the storage tank V; the net volume of the bottom silo of the negative four floors should be equal to the total volume of the initial rainwater V 初 First, the plan area of ​​the structure should be roughly determined based on the potentially approved land area. Since this is a four-story pump station, the plan areas of each floor are basically the same. The total volume of the storage tank = net plan area × net height when full of water. The volume of each floor is determined one by one:

[0037] Basement 1: The lowest elevation of the outlet pipe determines the elevation of the basement slab. The net height of this layer is determined in combination with the surface height that is acceptable on the basement surface to determine the volume V1 of the outlet storage layer.

[0038] Negative fourth floor: The top elevation of this floor should be slightly lower than the bottom height of the water inlet pipe, passing the total volume of initial rainwater V 初 The required net height of the bottom bunker on the fourth floor can be calculated by reverse calculation based on the net area of ​​the fourth floor below ground. After considering the appropriate top and bottom slopes, the bottom elevation of the fourth floor below ground can be determined, which is also the overall depth of the entire pump station, and the bottom bunker volume V4 can be determined.

[0039] Negative third floor: The bottom plate elevation of this layer is the top plate elevation of the negative fourth floor. The top surface elevation of this layer should be slightly higher than the top surface elevation of the most upstream pipe in the area under the jurisdiction of the pumping station (usually the rainwater pipe farthest from the pumping station) to determine the volume V3 of the rainwater pumping station layer;

[0040] Negative second floor: The top plate elevation of this layer is the bottom plate of negative first floor, and the bottom plate elevation is the top plate of negative third floor, which determines the volume V2 of the water retention layer.

[0041] At this point, the parameters of the above-mentioned layers of space have been preliminarily determined. It is still necessary to verify whether the total volume of the four layers is slightly larger than V, and on this basis, fine-tune the parameters to achieve a relatively optimal effect.

[0042] The water inlet grille 1 is generally made of metal, and larger debris is filtered out through the grille mesh. The grille is cleaned regularly, automatically or manually.

[0043] The bottom silo 22, located on the fourth floor below ground, is filled with initial rainwater (or incoming water) stored in the rainwater pumping station 21 on the third floor below ground. This water flows in through the spaced-apart openings 23 on the bottom of the circulation inlet silo 3. The funnel-shaped bottom allows sediment and debris in the water to settle in the center of the bottom silo. All sediment and stored water are then discharged into the sewage pipeline via the centrally located sewage pump 2. The sewage pump 2 has a sludge suction function.

[0044] In the outlet and regulating layer 19 located on the underground first floor, the non-initial rainwater stored in the rainwater pump station layer 21 located on the underground third floor is lifted to the outlet and regulating layer 19 by the rainwater lifting main pumps 61 to 64 located in the center of the layer, and is temporarily stored and regulated once in the outlet and regulating layer 19. The outlet and regulating layer 19 is connected to the outlet 13 through a controllable discharge gate 18 set in the outlet and regulating layer 19, and whether to open the gate depends on the downstream water discharge situation: when the discharge conditions are met (that is, water discharge is allowed downstream), the gate is directly opened to discharge, and the water is discharged to, for example, a river channel through the outlet pipe; when the discharge conditions are met (that is, water discharge is not allowed downstream), for example, if the rainfall is too heavy and staggered discharge is required or some rainwater needs to be retained for human control, the gate is closed, and the internal space of the outlet and regulating layer 19 located on the underground first floor constitutes a underground regulating pool 25 for storing rainwater.

[0045] After the rainwater in the underground first floor regulating and storage tank 25 is full, it flows into the water outlet retention layer 20 located on the underground second floor through the overflow funnels 51 and 52. The internal space of the water outlet retention layer 20 located on the underground second floor constitutes the underground second floor regulating and storage tank 26, which is used to continue to store rainwater to achieve secondary regulation and storage. At this time, the water outlet regulating and storage layer 19 located on the underground first floor is full of water. By reasonably controlling the opening of the external discharge gate 18, the water in the water outlet retention layer 20 located on the underground second floor overflows from the overflow pipe of the water outlet regulating and storage layer 19 located on the underground first floor, achieving the effect of secondary regulation and staggered discharge of rainwater. The water outlet retention layer 20 prolongs the staggered storage time to a certain extent. The water stored in this layer is lifted by the auxiliary lifting pump 8 set in this layer and then discharged to the external overflow water 9 connected to the underground first floor and discharged from the water outlet 13. It can also be connected to a dedicated pipeline for use as a supplement to surrounding water bodies or water for greening irrigation, etc. The auxiliary lift pump 8 has a lower power and flow rate than the main rainwater lift pumps 61-64 in the basement level 3. The water in the basement level 2 regulating reservoir 26 in the outlet retention layer 20 can be discharged by gravity after the external discharge gate is opened, without having to restart the water pump, thus reducing energy consumption.

[0046] If water is temporarily not allowed to flow out from the downstream, the first to fourth basement floors of the main structure will be used to store water. When all floors are full of water, the maximum water storage capacity of the pump station will be reached, and rainwater from upstream will no longer be able to flow in.

[0047] Flushing ports can be set on the surface of each concrete slab from the first to the fourth basement floor for regular flushing to prevent bottom sedimentation; fresh air can also be introduced when necessary for internal gas ventilation and replacement, so that maintenance personnel can flow into the interior.

[0048] The ancillary facilities include the above-ground building 14, including but not limited to the distribution room, equipment room, storage room, office, duty room and other supporting ancillary rooms and corresponding equipment and facilities.

[0049] The main structure is a reinforced concrete underground structure, and the outer contour of the plane is circular or quasi-circular, including polygons larger than a quadrilateral, or elliptical, oval, etc.

[0050] In areas with high groundwater levels, the ancillary facilities can be built together with the main structure to use gravity to resist buoyancy. In areas without groundwater, there is no need for anti-buoyancy, and the ancillary buildings can also be built separately at a selected location.

[0051] In summary, the advantages of the present invention are as follows:

[0052] 1. Solve the problem of adapting to the direction of water inlet and outlet through the shape of the plane (circular or approximately circular);

[0053] 2. Because the plane design is approximately circular, the engineering cost of the underground deep foundation pit support is greatly reduced;

[0054] 3. Make full use of the water storage space below and above the main structure of the pump station to achieve a certain storage effect (i.e. the volume of the storage tank). This maximizes the use of space and stores water in separate warehouses, making it easier to discharge water according to grade.

[0055] Initial and non-initial rainwater are discharged as sewage and rainwater respectively. This is intelligent classification.

[0056] Based on the embodiments of the present invention, all other embodiments and technical replacements and modifications of the embodiments obtained by ordinary technicians in this field without departing from the spirit of the present invention and without making creative work shall fall within the scope of protection of the present invention.

Claims

1. An intelligent rainwater storage pumping station, characterized in that: It consists of two parts: the main structure and ancillary facilities. The main structure is set below the surface and includes four functional layers from shallow to deep: the water storage layer on the first underground floor, the water retention layer on the second underground floor, the rainwater pump station layer on the third underground floor, and the bottom warehouse on the fourth underground floor. The ancillary facilities include above-ground buildings. The outlet water storage layer is used for temporary storage and primary storage of non-initial rainwater; The water retention layer is used for storing non-initial rainwater and secondary regulation; The rainwater pumping station layer is used for filtering and storing non-initial rainwater; The bottom bin is used to collect initial rainwater, which is then discharged into the sewage pipe after sedimentation treatment.

2. The intelligent rainwater pumping station according to claim 1, characterized in that: in: The outlet water storage layer is provided with an overflow funnel, an external discharge gate and a negative first floor storage tank. The overflow funnel is provided at the junction of the outlet water storage layer and the outlet water retention layer. The internal space of the outlet water storage layer serves as the negative first floor storage tank. The outlet retention layer is provided with an auxiliary lifting pump and a negative second-floor regulating and storing tank. The auxiliary lifting pump is provided in the outlet retention layer, and the internal space of the outlet retention layer serves as the negative second-floor regulating and storing tank. The rainwater pump station layer is provided with a circulation water inlet tank located in the outermost circle and arranged in a symmetrical manner around the center, an inner and outer main pump water collection area located in the inner circle of the layer and arranged in a symmetrical manner around the center, and a rainwater lifting main pump located in the center of the layer, spaced openings are provided at the bottom of the circulation water inlet tank, and side openings are provided on the inner side wall of the circulation water inlet tank; The bottom bin is provided with a funnel-shaped bottom plate, and a sewage pump is provided at the deepest part in the center of the bottom plate.

3. The intelligent rainwater pumping station according to claim 1, characterized in that: The total volume of the outlet storage layer, outlet retention layer, rainwater pump station layer and bottom warehouse is the total volume of the storage tank, among which the volume of each layer of the storage tank = net plane area × net height when full of water.

4. The intelligent rainwater pumping station according to claim 1, characterized in that: When the outlet water retention layer begins to collect water, the outlet water storage layer is in a full water state.

5. The intelligent rainwater pumping station according to claim 2, characterized in that: The power and flow rate of the auxiliary lifting pump are both smaller than those of the rainwater lifting main pump.

6. The intelligent rainwater storage pumping station according to claim 1, characterized in that: The outlet water storage layer, outlet water retention layer, rainwater pump station layer and bottom bin in the main structure are used for storing water. When all layers are full of water, the maximum water storage capacity designed by the pump station is reached.

7. The intelligent rainwater storage pumping station according to claim 1, characterized in that: The main structure is a reinforced concrete underground structure, and the outer contour of the plane is circular or quasi-circular, or includes but is not limited to a polygon larger than a quadrilateral, or an ellipse or an egg.

8. The intelligent rainwater storage pumping station according to claim 6, characterized in that: Flushing ports are also provided on the surface of each concrete slab in the underground part of the main structure for regular flushing to prevent bottom sedimentation.

9. The intelligent rainwater storage pumping station according to claim 2, characterized in that: The water stored in the outlet retention layer is lifted by the auxiliary lifting pump and discharged into the external discharge pipe connected to the outlet storage layer, or connected to a special pipe for use as water for surrounding water bodies or green irrigation.

10. A method for regulating and storing rainwater at an intelligent regulating and storing rainwater pumping station, wherein initial and non-initial rainwater are discharged as sewage and rainwater respectively, characterized in that: The method includes the following steps: After preliminary filtration, the upstream rainwater flows into the rainwater pumping station layer, flows through the spaced openings at the bottom of the circular flow inlet tank arranged in a symmetrical manner around the center of the outermost circle, and then flows into the bottom tank; After the bottom silo is full, the subsequent inflow of rainwater flows into the main pump water collection area of ​​the rainwater pump station layer through the side openings located on the inner wall of the circulation water inlet silo. The diameter and depth of the main structure of the rainwater pump station are adjusted so that the volume of the bottom silo is equivalent to the peak volume of the initial rainwater, so that the initial rainwater is collected and discharged as sewage. After the rainwater pump station layer is full, it is lifted by the rainwater lifting main pump to the outlet water storage layer, where it is temporarily stored and regulated once, and the rainwater is stored in the storage tank on the first negative layer. After the rainwater is filled in the storage tank on the first underground floor, it flows down into the outlet water retention layer through the overflow funnel set up in the outlet water storage layer. The storage tank on the second underground floor of the outlet water retention layer continues to store rainwater to achieve secondary storage. At this time, the outlet water storage layer is full of water. The controllable external discharge gate set in the outlet storage layer is connected to the outlet pipe, and the external discharge gate is opened according to the downstream water discharge situation; The water stored in the negative second floor regulating and storage tank located in the water outlet retention layer is lifted by the auxiliary lifting pump installed on this floor and discharged into the external discharge pipe connected to the water outlet regulating and storage layer, or connected to a special pipe for use as water for surrounding water bodies or greening irrigation.

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