Control system and control method for two-stage drainage pumping station of open stope

Abstract

The invention relates to a control system and a control method for a secondary drainage pumping station of an open stope, and belongs to the technical field of mine drainage control equipment and methods. According to the technical scheme, a physical layer network is connected with a mining dispatching room, a-187 m fixed pump station and a-247 m temporary movable pump station; the electrical control system is connected to the water pump, the electric adjusting pump and the submersible pump and is additionally provided with a box transformer substation; instruments and meters are additionally arranged on a-187 m fixed pump station and a-247 m temporary movable pump station; software and hardware of the automatic control system are arranged in a-187m fixed pump station and connected with a mining dispatching room through a physical layer network, and the software and hardware of the automatic control system are provided with a video monitoring system in a matched mode. The beneficial effects of the invention are that the system achieves the centralized management and control and automatic operation of the pump station through the construction of a perfect automatic system, reduces the labor intensity, improves the safety and equipment efficiency, meets the requirements of centralized control of a modern mine, and lays a solid foundation for the construction of an intelligent mine.

Description

Technical Field

[0001] This invention relates to a control system and control method for a secondary drainage pumping station in an open-pit mine, belonging to the technical field of mine drainage control equipment and methods. Background Technology

[0002] In large-scale open-pit mining, pumping stations are a crucial link in ensuring safe production, and their stable operation is essential for normal mine operations. Currently, many open-pit mine pumping stations suffer from low levels of automation. For example, the existing semi-automated pumping station system in the Sijiaying Iron Mine is no longer adequate for modern technological requirements. These systems suffer from outdated equipment technology, poor operational stability, low reliability, and an inability to monitor critical equipment data such as water tank levels and bearing temperatures in real time. Employees rely heavily on experience, leading to inconsistent judgment standards, increased risk of misoperation, and a tendency for employees to become complacent during long-term production, resulting in safety accidents. These systems fail to meet the demands of modern automated centralized control management in mines. Summary of the Invention

[0003] The purpose of this invention is to provide a control system and method for a secondary drainage pumping station in an open-pit mine. By constructing a complete automated system, the system enables centralized management and automated operation of the pumping station, reduces manual labor intensity, improves safety and equipment efficiency, adapts to the needs of modern mine centralized control, lays a solid foundation for the construction of smart mines, and effectively solves the aforementioned problems existing in the background technology.

[0004] The technical solution of this invention is: a control system for a secondary drainage pumping station in an open-pit mine, comprising a physical layer network, an electrical control system, instruments and meters, and an automated control system hardware and software. The physical layer network connects the mining dispatch room to a fixed pumping station at -187m and a temporary mobile pumping station at -247m. The electrical control system is connected to the water pumps, electric regulating pumps, and submersible pumps, and is also equipped with a transformer substation. The instruments and meters include intelligent pressure gauges and ultrasonic level gauges, which are installed at the fixed pumping station at -187m and the temporary mobile pumping station at -247m. The automated control system hardware and software is located at the fixed pumping station at -187m and is connected to the mining dispatch room through the physical layer network. The automated control system hardware and software is equipped with a video monitoring system.

[0005] The physical layer network is a tree-shaped fiber optic mesh. An 8-core fiber optic cable is laid between the mining dispatch room and the -247m temporary mobile pump station, passing through the -187m fixed pump station.

[0006] In the electrical control system, the four water pumps and 20 electric regulating valves in the -187m fixed pump station, and the five submersible pumps in the -247 temporary mobile pump station are equipped with a "remote / maintenance / local" control structure module and connected to the PLC control system; the -247 temporary mobile pump station is equipped with a box-type substation with seven 6kV medium-voltage electrical cabinets.

[0007] The instruments and meters include a smart pressure gauge installed at the outlet of four water pumps in a fixed pumping station at -187m, an ultrasonic level gauge installed at the pump pool of a temporary mobile pumping station at -247m, and a signal acquisition and control box that collects the pump body cooling water level, pump pool level, and stator winding temperature.

[0008] The automated control system hardware and software includes a controller, programming software, and a host computer. The controller uses Siemens 1500 or 1200 series PLCs, the programming software is Siemens TIA Portal V16, and the host computer uses Siemens WINCC 7.5 SP1 as the industrial control configuration screen. An operator station is set up at the -187m fixed pump station, and the field equipment parameters are transmitted to the mining dispatch room central control room in real time through the physical layer network.

[0009] The video surveillance system includes PTZ cameras, bullet cameras, and televisions. The PTZ cameras are installed inside the -187M fixed pump station. There are two bullet cameras, one installed at the water collection pool outside the -187M fixed pump station and the other at the -247 temporary mobile pump station. The televisions are installed in the mining dispatch room. The video surveillance signals collected by the PTZ cameras and bullet cameras are centrally transmitted to the televisions. There are four televisions, two of which display the video surveillance images, and the other two display the industrial control configuration images of the -187 pump station. The system is also equipped with two computers and a central control console.

[0010] A control method for a secondary drainage pumping station in an open-pit mine includes the following steps: S1: Data acquisition, collecting process and electrical parameters of water pumps and submersible pumps in the -187M fixed pump station and the -247 temporary mobile pump station, as well as the operating status of electric valves and auxiliary system equipment. S2: Industrial configuration, the operator station displays character and image information, and operators can perform process operation and monitoring of the water pumps in each pumping station through the operator station; S3: Equipment control, with both local and remote control modes. In local control, the water pump is started by combining the on-site control box with the on-site liquid level data. The relevant electric valves are opened or closed according to the outlet pressure. In remote control, the equipment control mode is switched to centralized control first. The operator station observes the relevant signals and video monitoring screen. After confirming that the safety and start-up conditions are met, the remote start-up and shutdown operations are performed in the dispatch room. S4: System protection, including stopping the pump when the pump starts up too late, stopping the pump when the motor current is abnormal during pump operation, and stopping the pump when the valve is closed during pump operation.

[0011] In step S1, the analog detection data includes the water level in the storage tank, the pump motor current, the outlet pressure, the pipeline flow rate, the motor stator temperature, and the front and rear bearing temperatures of the motor. The digital detection data includes the operating status of the water pump and the electric regulating valve, as well as the cooling water level of the submersible pump in the -247m temporary mobile pumping station.

[0012] In step S2, the operator station displays a comprehensive set of character and image information, including parameter display, equipment operating status display, trend curves of important parameters, alarm and event list, total motor running time and current running time statistics.

[0013] In step S3, the control requirements include automatically controlling the start and stop of the water pumps according to the water level in the water storage tank, starting the standby pumps in turn, automatically switching the faulty pumps, remotely operating the drainage pumps and related equipment, fault alarms, and prioritizing the shutdown of water pumps that have been running for a longer period of time.

[0014] The beneficial effects of this invention are: by constructing a complete automated system, centralized management and automated operation of pump stations can be achieved, reducing manual labor intensity, improving safety and equipment efficiency, adapting to the needs of modern mine centralized control, and laying a solid foundation for the construction of smart mines. Attached Figure Description

[0015] Figure 1 This is a control logic block diagram of the present invention; Figure 2 This is a network topology diagram of the video surveillance system of this invention; Figure 3 This is a network topology diagram for the device control of this invention. Detailed Implementation

[0016] To make the purpose, technical solutions, and advantages of the invention's embodiments clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only a small part of the embodiments of the present invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the protection scope of the present invention.

[0017] A control system for a secondary drainage pumping station in an open-pit mine includes a physical layer network, an electrical control system, instrumentation, and automated control system hardware and software. The physical layer network connects the mining dispatch room to a fixed pumping station at -187m and a temporary mobile pumping station at -247m. The electrical control system is connected to the water pumps, electric regulating pumps, and submersible pumps, and also includes a transformer substation. The instrumentation includes intelligent pressure gauges and ultrasonic level gauges, which are installed at the fixed pumping station at -187m and the temporary mobile pumping station at -247m. The automated control system hardware and software is located at the fixed pumping station at -187m and is connected to the mining dispatch room via the physical layer network. The automated control system hardware and software is equipped with a video monitoring system.

[0018] The physical layer network is a tree-shaped fiber optic mesh. An 8-core fiber optic cable is laid between the mining dispatch room and the -247m temporary mobile pump station, passing through the -187m fixed pump station.

[0019] In the electrical control system, the four water pumps and 20 electric regulating valves in the -187m fixed pump station, and the five submersible pumps in the -247 temporary mobile pump station are equipped with a "remote / maintenance / local" control structure module and connected to the PLC control system; the -247 temporary mobile pump station is equipped with a box-type substation with seven 6kV medium-voltage electrical cabinets.

[0020] The instruments and meters include a smart pressure gauge installed at the outlet of four water pumps in a fixed pumping station at -187m, an ultrasonic level gauge installed at the pump pool of a temporary mobile pumping station at -247m, and a signal acquisition and control box that collects the pump body cooling water level, pump pool level, and stator winding temperature.

[0021] The automated control system hardware and software includes a controller, programming software, and a host computer. The controller uses Siemens 1500 or 1200 series PLCs, the programming software is Siemens TIA Portal V16, and the host computer uses Siemens WINCC 7.5 SP1 as the industrial control configuration screen. An operator station is set up at the -187m fixed pump station, and the field equipment parameters are transmitted to the mining dispatch room central control room in real time through the physical layer network.

[0022] The video surveillance system includes PTZ cameras, bullet cameras, and televisions. The PTZ cameras are installed inside the -187M fixed pump station. There are two bullet cameras, one installed at the water collection pool outside the -187M fixed pump station and the other at the -247 temporary mobile pump station. The televisions are installed in the mining dispatch room. The video surveillance signals collected by the PTZ cameras and bullet cameras are centrally transmitted to the televisions. There are four televisions, two of which display the video surveillance images, and the other two display the industrial control configuration images of the -187 pump station. The system is also equipped with two computers and a central control console.

[0023] A control method for a secondary drainage pumping station in an open-pit mine includes the following steps: S1: Data acquisition, collecting process and electrical parameters of water pumps and submersible pumps in the -187M fixed pump station and the -247 temporary mobile pump station, as well as the operating status of electric valves and auxiliary system equipment. S2: Industrial configuration, the operator station displays character and image information, and operators can perform process operation and monitoring of the water pumps in each pumping station through the operator station; S3: Equipment control, with both local and remote control modes. In local control, the water pump is started by combining the on-site control box with the on-site liquid level data. The relevant electric valves are opened or closed according to the outlet pressure. In remote control, the equipment control mode is switched to centralized control first. The operator station observes the relevant signals and video monitoring screen. After confirming that the safety and start-up conditions are met, the remote start-up and shutdown operations are performed in the dispatch room. S4: System protection, including stopping the pump when the pump starts up too late, stopping the pump when the motor current is abnormal during pump operation, and stopping the pump when the valve is closed during pump operation.

[0024] In step S1, the analog detection data includes the water level in the storage tank, the pump motor current, the outlet pressure, the pipeline flow rate, the motor stator temperature, and the front and rear bearing temperatures of the motor. The digital detection data includes the operating status of the water pump and the electric regulating valve, as well as the cooling water level of the submersible pump in the -247m temporary mobile pumping station.

[0025] In step S2, the operator station displays a comprehensive set of character and image information, including parameter display, equipment operating status display, trend curves of important parameters, alarm and event list, total motor running time and current running time statistics.

[0026] In step S3, the control requirements include automatically controlling the start and stop of the water pumps according to the water level in the water storage tank, starting the standby pumps in turn, automatically switching the faulty pumps, remotely operating the drainage pumps and related equipment, fault alarms, and prioritizing the shutdown of water pumps that have been running for a longer period of time.

[0027] In practical applications, the technical solution adopted by this invention is: 1. System Architecture: The system includes a physical layer network, electrical control system, instrumentation, automation control system hardware and software, and a video surveillance system. The physical layer network utilizes fiber optic cabling, with an 8-core fiber optic cable running from the mining dispatch room to the -247m temporary mobile pumping station, passing through the -187m fixed pumping station, enabling real-time interconnection between the pumping stations and the central control room, breaking down information silos. The electrical control system upgrades the 4 water pumps and 20 electric regulating valves in the -187m fixed pumping station, as well as the 5 submersible pumps in the -247m temporary mobile pumping station, adding "remote / maintenance / local" control functions and connecting them to the PLC automation control system. Simultaneously, a new transformer substation with 7 6kV medium-voltage electrical cabinets is added to the -247m temporary mobile pumping station to replace the old equipment distribution transformer. In terms of instrumentation, intelligent pressure gauges with remote transmission capabilities were installed at the outlets of four water pumps at the -187m fixed pump station. An ultrasonic level gauge was added to the -247m temporary mobile pump station to detect the pump pool level, and a signal acquisition and control box was installed to collect signals such as pump cooling water level, pump pool level, and stator winding temperature. The automated control system uses Siemens 1500 and 1200 series PLCs as controllers, Siemens TIA Portal V16 as programming software, and Siemens WINCC 7.5 SP1 as the industrial control configuration screen. An operator station was set up at the -187m fixed pump station, and field equipment parameters were transmitted in real-time to the mining dispatch room's central control room via a tree-structured fiber optic network. The video surveillance system includes one PTZ camera installed at the -187M fixed pumping station, one bullet camera installed at the external water collection pool, and one bullet camera installed at a suitable location at the -247 temporary mobile pumping station. The video surveillance signals are centrally transmitted to the mining dispatch room control room. Four monitoring TVs are installed in the control room, two of which display the video surveillance images, and the other two display the industrial control configuration images of the -187 pumping station. It is also equipped with two computers and a central control console set.

[0028] 2. Control Methods: This includes data acquisition, industrial configuration, equipment control, and system protection. Data acquisition involves collecting process and electrical parameters of pumps and submersible pumps in the -187m fixed pump station and the -247m temporary mobile pump station, as well as the operating status of electric valves and auxiliary system equipment. Analog data includes water tank level, pump motor current, outlet pressure, pipeline flow rate, motor stator temperature, and motor front and rear bearing temperatures. Digital data includes the operating status of pumps and electric gate valves, and the cooling water level of the submersible pump in the -247m temporary pump station. In industrial configuration, the operator station can comprehensively display character and image information. Operators can use the operator station to perform process operation and monitoring of pumps in each pump station, specifically including parameter display (level, current, pressure, flow rate, temperature, etc.), equipment operating status display (motor operation, valve open / closed), trend curves for important parameters (level, current, pressure, flow rate, temperature), alarm and event lists, total motor operating time, and statistics of the current operating time. Equipment control supports both local and remote control modes. In local control, the water pump is started via the on-site control box combined with on-site liquid level data. The relevant electric valves are opened or closed based on the outlet pressure to ensure stable system operation. In remote control, the equipment control mode is first switched to centralized control. The operator station observes signals such as liquid level, pressure, temperature, and current, as well as video monitoring. After confirming safety and start-up conditions are met, remote start / stop operations are performed from the dispatch room. Control requirements include automatic start of the drainage pump when the water level in the storage tank is high, automatic stop of the drainage pump when the water level is low, and activation of all drainage pumps when the water level reaches the high level. When the water level in the storage tank exceeds the limit low level, the control system issues an alarm signal, prompting the shutdown of one drainage pump until the water level in the tank reaches the regulating water level line, at which point the alarm signal stops and prompts the restart of the drainage pump. During normal drainage, the standby pumps are started in rotation to ensure they are in good working order. If a normally operating pump malfunctions, the system automatically switches to the standby pump and automatically starts it. Remote operation of the drainage pumps and related equipment is enabled, as well as fault alarms for related equipment in the drainage pump room. After the water level drops to a predetermined position, the pumps that have been running for the longest time are prioritized for shutdown. Regarding system protection, if the outlet pressure fails to reach the set value within a certain time when the water pump starts, an alarm will be triggered and the pump will be stopped immediately. If the motor current suddenly decreases or increases and exceeds a certain time limit during water pump operation, an alarm will be triggered and the pump will be stopped immediately. If a valve on the pipeline suddenly closes during normal water pump operation, an alarm will be triggered and the pump will be stopped immediately.

[0029] The specific implementation steps are as follows: 1. System Setup: During the physical layer network setup, 8-core optical fibers were laid strictly according to design requirements, ensuring a reasonable fiber optic path and stable poles along the way. The system connects the -187m fixed pump station and the -247m temporary mobile pump station sequentially from the mining dispatch room, with intermediate connection devices reserved for future relocation of the pump stations. Regarding the electrical control system upgrade, control modules were carefully installed on the water pumps and electric regulating valves in the -187m fixed pump station, as well as the submersible pumps in the -247m temporary mobile pump station, to achieve "remote / maintenance / local" control functions and accurately connect to the PLC automation control system. Simultaneously, a new transformer substation was installed at the -247m temporary mobile pump station to ensure stable power supply to the electrical equipment. Instrument installation ensured accurate positioning; for example, a smart pressure gauge was correctly installed at the pump outlet of the -187m fixed pump station, and an ultrasonic level gauge and signal acquisition control box were appropriately installed at the -247m temporary mobile pump station to ensure accurate signal acquisition. The installation and commissioning of the automated control system's hardware and software were strictly carried out in accordance with Siemens' equipment installation guidelines. The CPU, I / O interface modules, digital input / output modules, and analog input modules were configured. Siemens TIA Portal V16 was used for programming, and the industrial control configuration screen on the host computer WINCC 7.5 SP1 was set up. An operator station was set up at the -187m fixed pump station, and a stable connection to the central control room was established via a fiber optic network. For the video surveillance system, PTZ cameras were installed at suitable locations within the -187m fixed pump station, and bullet cameras were installed at the external water collection tank and transformer substation. Bullet cameras were also installed at suitable locations at the -247m temporary mobile pump station, ensuring comprehensive coverage of critical equipment and areas. The video surveillance signals were centrally transmitted to the mining dispatch room's central control room via fiber optic cable. A monitoring television, computer, and central control console were appropriately installed in the central control room to enable real-time viewing and operation of the video surveillance footage and the industrial control configuration screen.

[0030] 2. System Operation and Maintenance: During system operation, the data acquisition module continuously collects data from various equipment and transmits it to the central control room in real time. Operators monitor and operate the pump station equipment through the operator station and the central control room. When the water level in the storage tank changes, the system automatically controls the start and stop of the pumps and the opening and closing of the electric valves according to the preset control logic. For example, when the water level reaches the high level, the system automatically starts the drainage pumps. If the water level continues to rise to the extreme high level, all drainage pumps will be turned on. When the water level drops to the low level, the drainage pumps will automatically stop. If the water level exceeds the extreme low level, the system will issue an alarm signal, prompting the shutdown of one drainage pump. When the water level returns to the regulating water level line, the alarm signal will stop and prompt the restart of the drainage pumps. In the event of equipment failure, such as pump start-up timeout, abnormal motor current, or sudden valve closure, the system protection module will immediately activate, issue an alarm, and promptly stop the pumps. Simultaneously, it will automatically switch to the standby pump to ensure the continuity of drainage operations. Regularly maintain the system, check the connection status of the fiber optic network to ensure stable data transmission; inspect and maintain electrical equipment to ensure normal operation; calibrate instruments to ensure the accuracy of data acquisition; and update and optimize the hardware and software of the automated control system to improve system performance and stability. Simultaneously, maintain the video surveillance system, check the camera's shooting effect, clean the lenses, and ensure clear monitoring images.

[0031] 3. Troubleshooting: If a system malfunction occurs, such as a network failure causing data transmission interruption, first check if the fiber optic connection is normal and whether there is any damage or looseness. If the fiber optic connection is normal, check the network equipment, such as switches and fiber optic transceivers, to see if they are working properly, using device indicator lights or professional testing tools. For electrical equipment malfunctions, such as motor malfunctions, use professional electrical testing equipment to test the motor and determine the cause of the malfunction, such as a short circuit or open circuit in the motor windings. Repair or replace the motor according to the fault situation. During troubleshooting, strictly follow the safety operating procedures to ensure the safety of maintenance personnel. Simultaneously, promptly record the time of the malfunction, the phenomena, the handling process, and the results for subsequent system analysis and optimization.

[0032] This invention, through the construction of a comprehensive automated system, achieves centralized management and control of pumping station equipment, transforming fixed positions into inspection positions and significantly reducing the labor intensity of on-site personnel. The system possesses diverse functions, capable of real-time collection of various equipment data, enabling remote control and automated operation of equipment, thus improving the overall automation level of the mining operation area. In terms of safety, the system's self-adjusting, self-diagnostic, and self-recovery functions, along with a robust system protection mechanism, effectively prevent safety accidents caused by equipment failure or misoperation, ensuring the safe and stable operation of the pumping station. Simultaneously, by optimizing equipment operation control strategies, such as automatically controlling pump start-up and shutdown based on water level and rotating standby pumps, the lifespan and operating efficiency of the equipment are improved, operating costs are reduced, and the system meets the development needs of modern mine automated centralized control management.

Claims

1. An open pit mine secondary drainage pump station control system characterized by: The physical layer network, the electrical control system, the instrument and the automation control system software and hardware are connected with the mining dispatching room and the -187 m fixed pump station and the -247 m temporary movable pump station; the electrical control system is connected with the water pump, the electric regulating pump and the submersible pump, and a box transformer is additionally arranged; The instrument includes the intelligent pressure gauge and the ultrasonic liquid level meter, which are arranged in the -187 m fixed pump station and the -247 m temporary movable pump station; the automation control system software and hardware are arranged in the -187 m fixed pump station and connected with the mining dispatching room through the physical layer network, and the automation control system software and hardware are additionally provided with the video monitoring system.

2. The control system for a pit secondary drainage pump station according to claim 1, characterized in that: The physical layer network is a tree-shaped optical fiber grid, 8-core optical fibers are laid between the mining dispatching room and the -247 m temporary movable pump station, and pass through the -187 m fixed pump station.

3. The control system for a pit secondary drainage pump station according to claim 1, characterized in that: In the electrical control system, the 4 water pumps and the 20 electric regulating valves in the -187 m fixed pump station and the 5 submersible pumps in the -247 m temporary movable pump station are additionally provided with the remote / repair / just-in-place control structure module and connected with the PLC control system; the -247 m temporary movable pump station is additionally provided with a box transformer with 7 6kv medium voltage electrical cabinets.

4. The control system for a pit secondary drainage pump station according to claim 1, characterized in that: The instrument includes the intelligent pressure gauge and the ultrasonic liquid level meter, which are arranged in the -187 m fixed pump station and the -247 m temporary movable pump station; the automation control system software and hardware are arranged in the -187 m fixed pump station and connected with the mining dispatching room through the physical layer network, and the automation control system software and hardware are additionally provided with the video monitoring system.

5. The control system for a pit secondary drainage pump station according to claim 1, characterized in that: The automation control system software and hardware include the controller, the programming software and the upper computer, the controller adopts the Siemens 1500 and 1200 series PLC, the programming software is the Siemens Bautu V16, the upper computer adopts the Siemens WINCC7.5SP1 as the industrial control configuration picture, the operator station is arranged in the -187 m fixed pump station, and the field device parameters are transmitted to the mining dispatching room in real time through the physical layer network.

6. The control system for a pit secondary drainage pump station according to claim 1, characterized in that: The video monitoring system includes the monitoring ball machine, the monitoring gun machine and the monitoring television, the monitoring ball machine is arranged in the -187 m fixed pump station, the monitoring gun machine includes two machines which are arranged at the water collecting pool outside the -187 m fixed pump station and the -247 m temporary movable pump station, the monitoring television is arranged in the mining dispatching room, the video monitoring signals collected by the monitoring ball machine and the monitoring gun machine are transmitted to the monitoring television, the monitoring television includes four machines, two of which display the video monitoring pictures, the other two display the industrial control configuration pictures of the -187 m pump station, and two computers are additionally arranged with the central control operation table.

7. An open pit mine secondary drainage pump station control method, characterized by The method includes the following steps: S1: data acquisition, the process parameters and electrical parameters of the water pump and the submersible pump in the -187 m fixed pump station and the -247 m temporary movable pump station, the running state of the electric valve and the equipment running state of the auxiliary system are collected; S2: industrial configuration, the operator station displays the character and image information, and the operator realizes the process operation and monitoring of the water pump in each pump station through the operator station; S3: Device control, with local and remote control modes. In local control mode, the water pump is started by the field operation box combined with the field liquid level data display, and the relevant electric valve is opened or closed according to the outlet pressure. In remote control mode, the device control mode is switched to centralized control first, and then the relevant signals and video monitoring pictures are observed in the operator station. After confirming that the safety and start conditions are met, remote start-stop operation is performed in the dispatching room. S4: System protection, including pump start timeout, pump shutdown due to abnormal motor current during pump operation, and pump shutdown due to valve closure during pump operation.

8. The control method of a pit secondary drainage pump station according to claim 7, characterized in that: In step S1, the analog detection data includes the water tank level, pump motor current, outlet pressure, pipeline flow, motor stator temperature, and motor front and rear bearing temperature. The digital detection data includes the operating status of the water pump and electric regulating valve, and the -247m temporary movable pump station submersible pump cooling water level.

9. The control method of a pit secondary drainage pump station according to claim 7, characterized in that: In step S2, the operator station displays character and image information, including parameter display, device operating status display, important parameter trend curve display, alarm and event list, motor operating total time and this time operating time statistics.

10. The control method of a pit secondary drainage pump station according to claim 7, characterized in that: In step S3, the control requirements include automatic control of water pump start-stop according to the water tank level, standby pump rotation start, fault pump automatic switching, remote operation of the drainage pump and related equipment, fault alarm, and priority closing of the water pump with longer operating time.

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