A control system for urban drainage pumping station cluster control

Abstract

The present application relates to the technical field of urban waterlogging treatment, in particular to a control system for urban drainage pump station centralized control. The system is based on urban drainage pump station, including flood season remote monitoring and early warning and automatic control system, automatic backwashing system after flood season, and regular self-checking and maintenance system during non-flood season. The flood season remote monitoring and early warning and automatic control system is used for monitoring the drainage pump station during flood season, and when the monitoring data abnormally fluctuates, a signal warning is given, and the system is automatically controlled during normal operation to ensure the stable operation of the drainage pump station. The automatic backwashing system after flood season is used for washing the drainage pump station after the end of flood season, and the washing water is supplied by municipal water supply and treated in a sewage plant to avoid environmental pollution. The regular self-checking and maintenance system during non-flood season is based on the self-checking function of the equipment itself, and the equipment is self-checked by solar power supply to reduce energy consumption and be more environmentally friendly.

Description

Technical Field

[0001] This invention relates to the field of urban flood control technology, specifically to a control system for centralized control of urban drainage pumping stations. Background Technology

[0002] During the rainy season, urban roads are prone to flooding. Every year, some cities are transformed into "waterlogged" areas due to flooding, causing traffic disruptions and threatening people's lives and property. The traditional method is to build drainage ditches on both sides of the road to drain rainwater into underground pipes. However, the construction of drainage ditches requires a lot of land, which can easily lead to soil erosion. In addition, regular cleaning and maintenance are required, which is costly. At the same time, when the rainfall is heavy, rainwater flows to low-lying areas, and the drainage pipes are under great pressure, which can also lead to severe water accumulation and poor drainage.

[0003] A drainage pumping station is a new type of urban drainage facility that integrates multiple functions such as rainwater collection, buffering, and transportation. Through an efficient and reliable rainwater collection system, it can quickly collect rainwater into the pumping station. Then, the water pumps in the pumping station pressurize the rainwater and discharge it into the river, thereby reducing the pressure on the drainage pipes and increasing the discharge speed of rainwater. Even during the rainy season, the city will not experience waterlogging. In addition, its structure is simple, its construction cost is low, it can be put into use quickly, and it reduces the occupation of land, which is conducive to the optimal use of land resources.

[0004] Drainage pumping stations are often built in areas of cities prone to flooding, and are characterized by wide distribution and strong targeting, enabling point-to-point treatment of urban flooding and effectively improving the effect of urban flood control. However, there are also some problems in practical applications, such as inconvenience in centralized scheduling and control, high daily maintenance costs, and the tendency for sludge to accumulate when the pumping stations are not used for a long time during the non-rainy season. Therefore, this invention proposes a centralized control system for urban drainage pumping stations, thereby improving the above-mentioned problems existing in the practical application of drainage pumping stations. Summary of the Invention

[0005] The purpose of this invention is to provide a control system for centralized control of urban drainage pumping stations, in order to solve the problems of existing drainage pumping stations being difficult to control uniformly, difficult to inspect and maintain, and prone to sludge blockage when idle during the flood season due to their wide distribution.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a control system for centralized control of urban drainage pumping stations, comprising a drainage pumping station, wherein the drainage pumping station is equipped with a pretreatment tank and a drainage tank, the pretreatment tank and the drainage tank are installed underground, and the bottoms of the pretreatment tank and the drainage tank are connected by a connecting pipe. An inlet pipe is provided at the bottom of the pretreatment tank. A coarse screen is provided in the pretreatment tank, located in front of the connecting pipe. A pulverizing screen is provided in the drainage tank, located behind the connecting pipe. Multiple variable frequency drainage pumps are provided in the drainage tank, and the variable frequency drainage pumps are connected to the drainage pipe. The system also includes a remote monitoring, early warning, and automatic control system for the drainage pumping station during flood season, an automatic backwashing system after the flood season, and a regular self-inspection and maintenance system during periods without flooding.

[0007] Furthermore, the aforementioned flood season remote monitoring, early warning, and automatic control system is equipped with an inlet electric valve on the inlet pipe, a first liquid level sensor in the pretreatment tank, a second liquid level sensor in the drainage tank, and a drainage flow meter on the drainage pipe. The first liquid level sensor, the second liquid level sensor, the inlet electric valve, the pulverizing screen, the variable frequency drainage pump, and the drainage flow meter are all connected to the PLC control system. The PLC control system is connected to the remote centralized control terminal through a signal transmission module.

[0008] Furthermore, when the first and second liquid level sensors detect that the water levels in the pretreatment tank and the drainage tank rise simultaneously at the beginning of the flood season, the PLC control system automatically adjusts the frequency of the variable frequency drainage pump and the number of variable frequency drainage pumps turned on, so that the water levels in the pretreatment tank and the drainage tank remain stable.

[0009] Furthermore, after the water levels in the pretreatment tank and the drainage tank remain stable, if the water level in the pretreatment tank continues to rise and the water level in the drainage tank continues to fall, while the flow rate shown by the drainage flow meter remains unchanged, the centralized control system will indicate a coarse screen blockage signal; if the water levels in both the pretreatment tank and the drainage tank continue to rise and the flow rate shown by the drainage flow meter decreases, a variable frequency drainage pump fault signal will be indicated.

[0010] Furthermore, after the water levels in the pretreatment tank and the drainage tank remain stable, when the water levels in both the pretreatment tank and the drainage tank decrease simultaneously, the frequency of the variable frequency drainage pump is gradually reduced and the variable frequency drainage pumps are stopped one by one. When the rainwater in the pretreatment tank and the drainage tank is drained, the variable frequency drainage pump stops working.

[0011] Furthermore, as the water level in the pretreatment tank and the drainage tank continues to rise and the flow rate indicated by the drainage flow meter decreases, the variable frequency drainage pumps that have not yet started are put into operation. When all the variable frequency drainage pumps have been put into operation, the opening degree of the inlet electric valve is reduced.

[0012] Furthermore, the automatic backwashing system after the flood season has a backwashing pipe installed above the pretreatment tank and the drainage tank. The backwashing pipe is connected to the municipal water supply pipe. A water supply electric valve is installed on the municipal water supply pipe. A sewage pump is installed in the pretreatment tank. The sewage pump is connected to the first sewage pipe. The drainage pipe is connected to the second sewage pipe. A drainage electric valve is installed on the drainage pipe. A sewage electric valve is installed on the second sewage pipe. The water supply electric valve, the sewage pump drainage electric valve, and the sewage electric valve are all connected to the PLC control system.

[0013] Furthermore, the aforementioned periodic self-inspection and maintenance system during periods without flooding has photovoltaic panels installed above the ground at the drainage pumping station. The photovoltaic panels are connected to the storage battery in the control cabinet via a photovoltaic controller. The storage battery is connected to a power detection module, which is connected to a PLC control system. The PLC control system is connected to a circuit switching module, which controls the switching between battery power supply and municipal power supply.

[0014] Furthermore, the battery provides power for the self-testing of various devices within the system.

[0015] The beneficial effects of this invention are:

[0016] 1. By connecting the drainage pumping station with the centralized control terminal, the operation status of the urban drainage pumping station can be monitored in real time through the centralized control terminal, which brings convenience to unified management and operation;

[0017] 2. By monitoring the parameters during the operation of the drainage pumping station, the operating status of the main equipment in the drainage pumping station can be effectively grasped. When a fault occurs, it can be detected and dealt with in a timely manner, which helps the drainage pumping station to operate stably and provides a guarantee for urban flood control.

[0018] 3. The system can flush the drainage pumping station immediately after the flood season ends. The backwashing can be started with one button, which is faster and can effectively prevent the drainage pumping station from accumulating sludge during the idle period. At the same time, the cleaned sewage is sent to the municipal sewage treatment plant for treatment, which can prevent sewage discharge from causing environmental pollution.

[0019] 4. During the idle period of the drainage pumping station, equipment self-inspection can effectively avoid damage caused by prolonged storage of equipment, enabling staff to promptly identify damaged equipment for timely repair and replacement, thereby ensuring the stable functioning of the drainage pumping station in flood control work.

[0020] 5. Powering the equipment's self-checks with solar power not only effectively reduces energy consumption, making it more energy-efficient and environmentally friendly, but also ensures the safety of electricity use during non-flood seasons. Furthermore, the automatic switching between solar power and municipal power ensures the stability of power supply during flood seasons, providing a guarantee for stable flood control work. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the drainage pumping station structure of the system of the present invention;

[0022] Figure 2 This is a schematic diagram of the remote start control of the system of the present invention;

[0023] Figure 3 This is a schematic diagram of the system operation monitoring and control of the present invention;

[0024] Figure 4 This is a schematic diagram of the daily verification and maintenance of the system of the present invention;

[0025] Figure 5 This is a schematic diagram of the backwashing system startup control of the present invention.

[0026] The names corresponding to each mark in the diagram:

[0027] 1. Pretreatment tank; 11. Inlet pipe; 111. Inlet electric valve; 12. First liquid level sensor; 13. Coarse screen; 131. Gate hoist; 14. Sewage pump; 15. First sewage pipe; 2. Drainage tank; 21. Crushing screen; 22. Variable frequency drainage pump; 23. Drainage pipe; 231. Drainage electric valve; 232. Drainage flow meter; 24. Second sewage pipe; 241. Sewage electric valve; 25. Second liquid level sensor; 26. Deodorizer; 3. Backwash pipe; 31. Municipal water supply pipe; 311. Water supply electric valve; 4. Photovoltaic panel; 5. Control cabinet; 51. PLC control system; 52. Photovoltaic controller; 53. Battery; 54. Power detection module; 55. Circuit switching module; 56. Signal transmission module. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0029] like Figure 1As shown, the drainage pumping station of the present invention is equipped with a pretreatment tank 1 and a drainage tank 2. The bottoms of the pretreatment tank 1 and the drainage tank 2 are connected by a connecting pipe. A water inlet pipe 11 is provided at the bottom of the pretreatment tank 1. A water inlet electric valve 111 is provided on the water inlet pipe 11. A coarse screen 13 is provided in the pretreatment tank 1. The coarse screen 13 is located in front of the connecting pipe. At the same time, the top of the coarse screen 13 is connected to the hoist 131. A first liquid level sensor 12 is provided at the top inside the pretreatment tank 1. A sewage pump 14 is provided at the bottom of the pretreatment tank 1. The sewage pump 14 is connected to the first sewage pipe 15.

[0030] A pulverizing screen 21 is installed in the drainage tank 2, located behind the connecting pipe. Multiple variable frequency drainage pumps 22 are installed in the drainage tank 2, and the variable frequency drainage pumps 22 are connected to the drainage pipe 23. A drainage electric valve 231 and a drainage flow meter 232 are installed on the drainage pipe 23. The drainage pipe 23 is also connected to the second sewage pipe 24, and a sewage electric valve 241 is installed on the second sewage pipe 24. A second liquid level sensor 25 is installed at the top inside the drainage tank 2, and a deodorizer 26 is installed at the top of the drainage tank 2, which is connected to the inside of the drainage tank 2.

[0031] A backwash pipe 3 is installed between the pretreatment tank 1 and the drainage tank 2. The backwash pipe 3 is connected to the municipal water supply pipe 31. A water supply electric valve 311 is installed on the municipal water supply pipe 31.

[0032] A bracket is set on the ground, and photovoltaic panels are installed on the bracket. A control cabinet 5 is also installed on the ground. The control cabinet 5 contains a photovoltaic controller 52, which is connected to the photovoltaic panel 4 and a storage battery 53. The control cabinet 5 also contains a PLC control system 51, which is connected to a power detection module 54, which is connected to the storage battery 53. A circuit switching module 55 is also set up, which is connected to the PLC control system 51, the storage battery 53, and the municipal power supply. In addition, the PLC control system 51 is connected to a remote centralized control terminal through a signal transmission module 56.

[0033] The principle of this invention is as follows:

[0034] The system of this invention involves three aspects during use: remote monitoring and automatic control during flood season, automatic backwashing at the end of the flood season, and daily self-inspection and maintenance during periods without flooding.

[0035] Among them, for remote monitoring, early warning and automatic control during flood season, when the flood season arrives and urban drainage is required, the drainage and flood control system can be started with one click on the remote terminal. During the process, the control cabinet 5 receives the control signal from the remote terminal through the signal transmission module 56. At this time, the PLC control system 51 switches the power supply mode to municipal power supply, and then controls the inlet electric valve 111 to open, the first liquid level sensor 12 to work, the crushing bar 21 to work, the variable frequency drainage pump 22 to work, the second liquid level sensor 25 to work, the deodorizer 26 to work, the drainage electric valve 231 to open, the drainage flow meter 232 to work, and the remaining electric valves to remain closed.

[0036] Therefore, rainwater entering the pretreatment tank 1 through the inlet pipe 11 undergoes preliminary impurity removal through the coarse screen 13, and then enters the drainage tank 2 through the connecting pipe. In the drainage tank 2, large stones and other debris are crushed by the crushing screen 21, and then pumped into the drainage pipe 23 by the variable frequency drainage pump 22, and then discharged into the river, thereby increasing the discharge speed of rainwater and preventing urban flooding.

[0037] In the above process, the first liquid level sensor 12 and the second liquid level sensor 25 are used to monitor the water level in the pretreatment tank 1 and the drainage tank 2, respectively. The first liquid level sensor 12 and the second liquid level sensor 25 can be ultrasonic liquid level sensors, etc., and transmit the water level signal to the PLC control system 51. The PLC control system 51 processes the water level signal. When it finds that the water level in the pretreatment tank 1 and the drainage tank 2 are rising continuously, it indicates that the inflow rate is greater than the outflow rate. Therefore, it is necessary to increase the power of the variable frequency drainage pump 22 or start the number of variable frequency drainage pumps 22 (the variable frequency drainage pump 22 is a variable frequency pump. If it is a fixed frequency pump, a corresponding control valve needs to be set). Finally, the water level in the pretreatment tank 1 and the drainage tank 2 can be kept stable. When it finally stabilizes, the water level in the pretreatment tank 1 is higher than the water level in the drainage tank 2, and there is a certain water level difference. The water flow in the inlet pipe 11 is basically the water flow in the connecting pipe, and is also basically the drainage volume of the variable frequency drainage pump 22. Small fluctuations in the process will also be automatically adjusted.

[0038] After the above operation stabilizes, if an emergency occurs, such as the inlet coarse screen 13 becoming blocked, the amount of water flowing into the drain tank 2 will decrease. As a result, while the inlet flow rate remains basically unchanged, the water level in the pretreatment tank 1 will continue to rise, while the water level in the drain tank 2 will continue to fall. In addition, the flow rate of the drain flow meter 232 will remain unchanged. Therefore, if this phenomenon persists for a period of time, such as 5 to 10 minutes, other interferences can be basically ruled out, indicating that the inlet coarse screen is blocked. At this time, maintenance personnel need to go to the site for maintenance in a timely manner. The screen can be lifted and cleaned by the screen opening and closing machine 131. In actual operation, the screen has generally been treated once before the inlet pipe 11, so the probability of blockage of the coarse screen is not very high in actual operation.

[0039] After stable operation, the water level in pretreatment tank 1 suddenly continued to rise, and the water level in drainage tank 2 also showed an upward trend. At this time, the cause of the sudden increase in water inflow cannot be ruled out. If the drainage flow meter 232 also continued to increase during the process, it can be proven that the water volume suddenly increased. When the water flow of drainage flow meter 232 decreased, it is necessary to consider whether some of the variable frequency drainage pumps 22 had failed. When the variable frequency drainage pumps failed, the opening of the inlet electric valve 111 could be controlled immediately to reduce the water inflow and ensure the stable operation of the drainage pumping station.

[0040] During stable operation, the water levels in both the pretreatment tank 1 and the drainage tank 2 decreased, indicating a reduction in the inflow and that the flood season was nearing its end. During this process, the system automatically adjusted the frequency of the variable frequency drainage pump and gradually shut it off (the variable frequency drainage pump could only be shut off after the first level sensor 12 and the second level sensor 25 had slid through the water level until it was almost completely drained). Once the variable frequency drainage pump 22 was shut off, all valves and components in the system also stopped operating.

[0041] The data generated during the operation of the above system can be transmitted to a remote terminal via the PLC control system 51, enabling real-time monitoring of the operating data. If any abnormalities occur during the process, on-site monitoring personnel can effectively analyze and judge the abnormalities, thereby enabling timely maintenance and ensuring the stable operation of the drainage pumping station during the flood season.

[0042] After the flood control period, the drainage pumping stations need to be cleaned to prevent silt accumulation from affecting their operation. In actual use, since the silt accumulation in the coarse screen 13 and drainage tank 2 is not significant, the backwashing system is remotely activated. The circuit switches back to the municipal power supply system, and the electric valve 311 on the backwashing pipe 31 connected to the municipal water supply pipeline automatically opens. Simultaneously, the first level sensor 12 and the second level sensor 25 begin operation, and the sewage discharge electric valve 241 opens. At this time, the backwash water flushes the pretreatment tank 1 and drainage tank 2. During this process... For the rinsing of the coarse screen 13, backwashing is performed from the back of the coarse screen 13 to improve the rinsing effect. When the water level in the pretreatment tank 1 rises to a certain level, the sewage pump 14 is started to discharge the sewage in the pretreatment tank 1 through the first sewage pipe 15. The sludge accumulation in the drainage tank 2 will be relatively small. After rinsing, when the water level in the drainage tank 2 reaches a certain level, the variable frequency drainage pump 22 is turned on to discharge the cleaning sewage through the second sewage pipe 24. During the process, the sewage discharged from the first sewage pipe 15 and the second sewage pipe 24 flows into the municipal sewage pipe and then goes to the sewage treatment plant for sewage treatment.

[0043] If the coarse screen is already clogged before backwashing, manual cleaning of the coarse screen is required on-site to ensure the effectiveness of the backwashing.

[0044] After the flood season ends and backwashing is completed, the drainage pumping station basically enters an idle period. During this time, the entire pumping station is essentially not operating, and electrical equipment and components are prone to damage due to prolonged inactivity. Therefore, periodic maintenance is necessary to ensure the flood control capabilities of the drainage pumping station during the flood season. In this process, the present invention adopts a solar power supply mode, generating electricity through photovoltaic panels and storing the energy in batteries. This energy is then used for self-checking of the system equipment (existing equipment generally has self-checking functions, which can be selected during the purchase process). During this process, the self-checking signals of each device are transmitted to the PLC control system 51, and then to the remote centralized control terminal. This allows for accurate monitoring of the operating status of each device, enabling timely repair and replacement, thus ensuring the flood control capabilities of the drainage pumping station.

[0045] This invention is not limited to the preferred embodiments described above. Anyone can derive other forms of products under the guidance of this invention. However, regardless of any changes made in their shape or structure, any technical solution that is the same as or similar to this application falls within the protection scope of this invention.

Claims

1. A control system for centralized control of urban drainage pumping stations, comprising a drainage pumping station, wherein the drainage pumping station is provided with a pretreatment tank (1) and a drainage tank (2), the pretreatment tank (1) and the drainage tank (2) are installed underground, the bottoms of the pretreatment tank (1) and the drainage tank (2) are connected by a connecting pipe, an inlet pipe (11) is provided at the bottom of the pretreatment tank (1), a coarse screen (13) is provided in the pretreatment tank (1), the coarse screen (13) is located in front of the connecting pipe, a crushing screen (21) is provided in the drainage tank (2), the crushing screen (21) is located behind the connecting pipe, and multiple variable frequency drainage pumps (22) are provided in the drainage tank (2), the variable frequency drainage pumps (22) are connected to a drainage pipe (23), characterized in that: It also includes a remote monitoring, early warning and automatic control system for flood season, an automatic backwashing system after the flood season, and a regular self-inspection and maintenance system during periods without flooding for the drainage pumping station; The aforementioned flood season remote monitoring, early warning and automatic control system has an inlet electric valve (111) installed on the inlet pipe (11), a first liquid level sensor (12) installed in the pretreatment tank (1), a second liquid level sensor (25) installed in the drainage tank (2), and a drainage flow meter (232) installed on the drainage pipe (23). The first liquid level sensor (12), the second liquid level sensor (25), the inlet electric valve (111), the crushing grid (21), the variable frequency drainage pump (22) and the drainage flow meter (232) are respectively connected to the PLC control system (51). The PLC control system (51) is connected to the remote control terminal through the signal transmission module (56). When the first liquid level sensor (12) and the second liquid level sensor (25) detect that the water levels in the pretreatment tank (1) and the drainage tank (2) rise simultaneously at the beginning of the flood season, the PLC control system (51) automatically adjusts the frequency of the variable frequency drainage pump (22) and the number of variable frequency drainage pumps (22) turned on, so that the water levels in the pretreatment tank (1) and the drainage tank (2) remain stable. After the water levels in the pretreatment tank (1) and the drainage tank (2) remain stable, when the water level in the pretreatment tank (1) continues to rise and the water level in the drainage tank (2) continues to fall, and the flow rate shown by the drainage flow meter (232) remains unchanged, the PLC control system (51) prompts a signal indicating that the coarse screen (13) is blocked; when the water levels in the pretreatment tank (1) and the drainage tank (2) continue to rise and the flow rate shown by the drainage flow meter (232) decreases, a signal indicating that the frequency converter drainage pump (22) is faulty is prompted.

2. The control system for centralized control of urban drainage pumping stations according to claim 1, characterized in that: After the water levels in the pretreatment tank (1) and the drainage tank (2) are kept stable, when the water levels in the pretreatment tank (1) and the drainage tank (2) drop simultaneously, the frequency of the variable frequency drainage pump (22) is gradually reduced and the variable frequency drainage pump (22) is stopped one by one. When the rainwater in the pretreatment tank (1) and the drainage tank (2) is drained, the variable frequency drainage pump (22) stops working.

3. The control system for centralized control of urban drainage pumping stations according to claim 1, characterized in that: When the water level in the pretreatment tank (1) and the drainage tank (2) continues to rise and the flow rate shown by the drainage flow meter (232) decreases, the variable frequency drainage pump (22) that has not been started is put into operation. When all the variable frequency drainage pumps (22) have been put into operation, the opening of the inlet electric valve (111) is reduced.

4. The control system for centralized control of urban drainage pumping stations according to claim 1, characterized in that: The automatic backwashing system after the flood season is provided with a backwashing pipe (3) above the pretreatment tank (1) and the drainage tank (2). The backwashing pipe (3) is connected to the municipal water supply pipe (31). A water supply electric valve (311) is installed on the municipal water supply pipe (31). A sewage pump (14) is provided in the pretreatment tank (1). The sewage pump (14) is connected to the first sewage pipe (15). The drainage pipe (23) is connected to the second sewage pipe (24). A drainage electric valve (231) is provided on the drainage pipe (23). A sewage electric valve (241) is provided on the second sewage pipe (24). The water supply electric valve (311), the sewage pump (14), the drainage electric valve (231), and the sewage electric valve (241) are respectively connected to the PLC control system (51).

5. A control system for centralized control of urban drainage pumping stations according to claim 4, characterized in that: The aforementioned periodic self-inspection and maintenance system during periods without flooding includes a photovoltaic panel (4) installed above the ground of the drainage pumping station. The photovoltaic panel (4) is connected to the battery (53) in the control cabinet (5) via a photovoltaic controller (52). The battery (53) is connected to the power detection module (54). The power detection module (54) is connected to the PLC control system (51). The PLC control system (51) is connected to the circuit switching module (55). The circuit switching module (55) controls the switching between the battery (53) power supply and the municipal power supply.

6. A control system for centralized control of urban drainage pumping stations according to claim 5, characterized in that: The battery (53) provides power for the self-test of each device in the system.

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