Leakage drainage control system for underground powerhouse

Abstract

This utility model discloses a leakage drainage control system for an underground power plant, relating to the field of underground drainage control technology. It includes a control box, a liquid level monitoring module, a display screen, and a communication module. The control box houses a first power supply, a second power supply, a dual-power switch, a current acquisition module, a voltage acquisition module, a first water pump control circuit, a second water pump control circuit, and a third water pump control circuit. The first and second power supplies are connected to a power supply line via the dual-power switch. The power supply line is equipped with the current and voltage acquisition modules. The first, second, and third water pump control circuits are connected to the power supply line. The output of the liquid level monitoring module is connected to the control box, which is connected to the display screen and the communication module. This utility model monitors leakage drainage in the underground power plant by setting up a liquid level monitoring module, obtaining liquid level information for convenient operation monitoring and timely detection and handling of equipment defects.

Description

Technical Field

[0001] This utility model relates to the field of underground drainage control technology, specifically to an underground plant leakage drainage control system. Background Technology

[0002] The leakage drainage control system was put into operation relatively early, and the number of defects has gradually increased. Moreover, there is only one type of water level monitoring device for the sump well, which is a float-type liquid level switch. This does not meet the requirements of 3.2.1.2 of the "Major Accident Prevention Measures for Hydropower Plants of State Grid Corporation", which requires the configuration of two sets of water level monitoring devices for the sump wells of the plant with different principles and a high water level alarm device. This poses a risk of flooding of the plant and personal injury.

[0003] During unit operation, the underground powerhouse water pumps are started approximately every 11 hours, pumping water for 1 hour each time. The construction adit leakage drainage pumps are started approximately every 3 hours, pumping water for half an hour each time. During the unit overhaul in 2020, the unit used gravity drainage, and the underground powerhouse leakage drainage pumps were started every 2 hours, with the standby pump also needing to be started. One pump could not pump the water level down in time, and the water level in the sump rose rapidly, posing a risk of flooding the powerhouse.

[0004] The main reasons affecting the reliability of pump operation in the leakage drainage system are outdated control systems, unreasonable control logic, aging automation components, and limited monitoring signals. In addition, the power control system in the leakage drainage system is a relay circuit that only sends pump start signals. It cannot monitor pump failures, pump rotation, water levels, etc. It can only monitor the relevant areas through industrial television, which is not conducive to the operation personnel's monitoring and judgment, and timely handling of accidents.

[0005] Therefore, improving the reliability of leakage drainage control systems has become an urgent problem to be solved. Utility Model Content

[0006] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology, design a leakage drainage control system for underground powerhouses, reduce the starting defects of water pumps in water collection wells, optimize the pump rotation logic, and improve the pump operation monitoring method.

[0007] The technical solution adopted by this utility model to solve its technical problem is:

[0008] The underground plant leakage and drainage control system includes:

[0009] The system includes a control box, a liquid level monitoring module, a display screen, and a communication module. The control box is equipped with a first power supply, a second power supply, a dual power supply switch, a current acquisition module, a voltage acquisition module, a first water pump control module, a second water pump control module, and a third water pump control module.

[0010] The first power supply and the second power supply are connected to the power supply line through a dual power supply switching switch. The power supply line is equipped with a current acquisition module and a voltage acquisition module. The first water pump control module, the second water pump control module and the third water pump control module are connected to the power supply line.

[0011] The output of the liquid level monitoring module is connected to the control box, and the control box is connected to the display screen and the communication module.

[0012] As a further technical solution of this utility model, a total power detection module is also provided on the power supply line for detecting the power supply of single-phase lines.

[0013] As a further technical solution of this utility model, the first water pump control module includes a first fuse, a first water pump control circuit and a first water pump. The first fuse is connected to the power supply line, the output terminal of the first fuse is connected to the first water pump control circuit, and the output terminal of the first water pump control circuit is connected to the first water pump.

[0014] As a further technical solution of this utility model, the first water pump control circuit includes: a soft starter, a manual / automatic switching switch, a stop button, a start button, a manual self-locking switch, a remote start / stop control switch, a running indicator light, a stop indicator light, and a fault indicator light.

[0015] As a further technical solution of this utility model, a temperature and humidity control module is provided in the control box. The temperature and humidity control module includes: a power conversion circuit, a heating plate and a cooling fan, and a temperature and humidity controller. The power conversion circuit is connected to the power supply line through a fuse. The output terminal of the power conversion circuit is connected to the temperature and humidity controller. The output terminal of the temperature and humidity controller is connected to the heating plate and the cooling fan.

[0016] As a further technical solution of this utility model, the liquid level monitoring module adopts one or two of the following: float-type signal source, radar-type signal source, and hydrostatic signal source.

[0017] Furthermore, the liquid level monitoring module is a float-type signal source, including four positions: low liquid level control feedback switch, low liquid level control feedback switch, high liquid level control feedback switch, and high liquid level control feedback switch.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. This utility model monitors the leakage and drainage of the underground plant by setting up a liquid level monitoring module to obtain liquid level information, and controls the start and stop of three sets of water pumps through the control box to control the leakage and drainage of the underground plant.

[0020] 2. A dual power supply switch is used to switch between two power supplies, and a closing feedback circuit is set up to feed back the closing information to the control box for display, making it easy to view.

[0021] 3. The single-phase lines are tested by setting the main power supply detection, and the DC voltage is output through the power conversion module to supply the DC voltage required for the control box to work.

[0022] 4. This utility model strengthens the technical supervision and verification of pressure gauges, voltmeters, ammeters, relays, etc. in the leakage drainage system, detects equipment change trends in advance, and takes timely action to ensure reliable equipment operation;

[0023] 5. By improving the remote automatic, manual, water pump start, standby pump start, high water level, low water level, and low water level signals, operation monitoring is made more convenient, and equipment defects can be detected and dealt with in a timely manner. Attached Figure Description

[0024] Figure 1 The circuit diagram of the main circuit of the underground plant leakage drainage control system proposed in this utility model is shown below.

[0025] Figure 2 This is a circuit diagram showing the connection between the display screen and the communication module proposed in this utility model;

[0026] Figure 3 This is a structural diagram of the first water pump control circuit proposed in this utility model;

[0027] Figure 4 This is a circuit diagram of the first water pump feedback control circuit proposed in this utility model;

[0028] Figure 5 This is a circuit diagram of the temperature and humidity control module proposed in this utility model;

[0029] Figure 6 This is a circuit diagram of the liquid level monitoring and control proposed in this utility model;

[0030] Figure 7 This is a circuit diagram of the liquid level feedback control proposed in this utility model;

[0031] Figure 8 This is the circuit diagram of the water pump start-up control proposed in this utility model;

[0032] Figure 9 This is the circuit diagram of the water pump alarm control proposed in this utility model;

[0033] Figure 10 This is the circuit diagram for the liquid level monitoring and control proposed in this utility model. Detailed Implementation

[0034] The specific embodiments of this utility model are described below with reference to the accompanying drawings and examples:

[0035] It should be noted that the structures, colors, proportions, sizes, etc. shown in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0036] Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in this specification are only for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as within the scope of implementation of this utility model.

[0037] like Figure 1 and Figure 2 As shown, this utility model provides a leakage drainage control system for underground powerhouses, comprising:

[0038] The system includes a control box, a liquid level monitoring module, a display screen, and a communication module. The control box is equipped with a first power supply, a second power supply, a dual power supply switch, a current acquisition module, a voltage acquisition module, a first water pump control module, a second water pump control module, and a third water pump control module.

[0039] The first power supply and the second power supply are connected to the power supply line through a dual power supply switching switch. The power supply line is equipped with a current acquisition module and a voltage acquisition module. The first water pump control module, the second water pump control module and the third water pump control module are connected to the power supply line.

[0040] The output of the liquid level monitoring module is connected to the control box, and the control box is connected to the display screen and the communication module.

[0041] This utility model monitors the leakage and drainage of the underground plant by setting up a liquid level monitoring module to obtain liquid level information, controls the start and stop of three sets of water pumps through the control box to control the leakage and drainage of the underground plant, and collects the voltage and current of the power supply line through the current acquisition module and voltage acquisition module to provide a stable working power supply for the control system.

[0042] The first and second power supplies are set as primary and backup power supplies to provide reliable operating power for the three sets of water pumps. A dual power supply switch is used to switch between the two power supplies, and a closing feedback circuit is set to feed the closing information back to the control box for display, which is convenient for viewing.

[0043] In this embodiment of the invention, a main power supply detection module is also provided on the power supply line for detecting the power supply of single-phase lines. By setting up the main power supply detection module to detect the single-phase lines, the DC voltage output is supplied to the control box through the power conversion module.

[0044] The first, second, and third water pump control modules are all connected to the power supply line. The circuit structures of the first, second, and third water pump control modules are the same. Taking the first water pump control module as an example, the first water pump control module includes a first fuse QF2, a first water pump control circuit RQ1, and a first water pump M1. The first fuse is connected to the power supply line QF2. The output terminal of the first fuse QF2 is connected to the first water pump control circuit RQ1. The output terminal of the first water pump control circuit RQ1 is connected to the first water pump M1.

[0045] See Figure 3 and Figure 4 The first water pump control circuit RQ1 includes: a soft starter, a manual / automatic switch, a stop button, a start button, a manual self-locking switch, a remote start / stop control switch, a running indicator light, a stop indicator light, and a fault indicator light.

[0046] In the main circuit, X2 is the dual power supply switching signal, K1 relay power monitoring signal, and soft starter fault related signal, ensuring the reliability of the power supply circuit.

[0047] For example, in the start-up circuit, under manual control mode, if the stop button S12E is not pressed, but the start button S13E for pump 1 is pressed, the soft starter starts and there is no fault, and pump 1 runs. In automatic control mode, there are two modes: self-start and remote start. Self-start means that the PLC issues a start command for pump 1, relay K13 is energized, the soft starter starts and there is no fault, and pump 1 runs. Remote start means that the host computer monitoring system issues a start command, the soft starter starts and there is no fault, and pump 1 runs.

[0048] See Figure 5 In this embodiment of the utility model, a temperature and humidity control module is provided inside the control box. The temperature and humidity control module includes: a power conversion circuit, a heating plate and a cooling fan, and a temperature and humidity controller. The power conversion circuit is connected to the power supply line through a fuse. The output terminal of the power conversion circuit is connected to the temperature and humidity controller. The output terminal of the temperature and humidity controller is connected to the heating plate and the cooling fan.

[0049] By setting up a temperature and humidity control module, the temperature and humidity inside the control box are monitored. When the temperature inside the control box is low or the humidity is high, the heating plate is activated to heat the inside of the control box, ensuring the normal operation of the electronic components. When the temperature inside the control box is too high, the cooling fan is activated to dissipate heat from the control box, ensuring the normal operation of the electronic equipment inside the control box. The temperature and humidity controller facilitates the control of heating and heat dissipation.

[0050] In this embodiment of the invention, the liquid level monitoring module can employ one or two of the following: a float-type signal source, a radar-type signal source, and a hydrostatic signal source. The selection and settings can be tailored to specific site requirements. For example, radar level / input level / high level can be selected, with the first pump activated when two conditions are met to reach a high water level; alternatively, only two signal sources can be selected for control, such as float-type and radar-type, with the first pump activated when either condition reaches a high water level; selecting only one signal source will activate the first pump only when that signal reaches a high water level, preventing flooding of the plant due to a single component failure; a three-pump rotation mode can also be added, which is beneficial to the pump equipment's lifespan and improves equipment operational reliability.

[0051] See Figure 6 and Figure 7 The liquid level monitoring module is a float-type signal source, including four positions: low liquid level control feedback switch, low liquid level control feedback switch, high liquid level control feedback switch, and high liquid level control feedback switch. The liquid level signal is monitored and fed back through four sets of relays K2-K5.

[0052] See Figures 8 to 10 The control circuit was improved by enhancing the soft starter fault interlocking relay circuit for the pump start signal (K22), improving the pump self-starting relay circuit (K23), and adding radar level signals (X10:1-2 circuit) and hydrostatic level signals (X10:3-4 circuit) as signal sources for monitoring the water level in the collection well and starting the pump. This enhanced the reliability of the control system.

[0053] This invention utilizes E+H brand equipment for radar level switches and hydrostatic level switches, enhancing component stability; it strengthens technical supervision and verification of pressure gauges, voltmeters, ammeters, relays, etc., in the leakage drainage system, enabling early detection of equipment changes and timely handling to ensure reliable equipment operation; and it improves the remote automatic, manual, pump start, standby pump start, high water level, low water level, and low water level signals, making operation monitoring more convenient and allowing for timely detection and handling of equipment defects.

[0054] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A leakage drainage control system for underground powerhouses, characterized in that: include: The system includes a control box, a liquid level monitoring module, a display screen, and a communication module. The control box is equipped with a first power supply, a second power supply, a dual power supply switch, a current acquisition module, a voltage acquisition module, a first water pump control module, a second water pump control module, and a third water pump control module. The first power supply and the second power supply are connected to the power supply line through a dual power supply switching switch. The power supply line is equipped with a current acquisition module and a voltage acquisition module. The first water pump control module, the second water pump control module and the third water pump control module are connected to the power supply line. The output of the liquid level monitoring module is connected to the control box, and the control box is connected to the display screen and the communication module.

2. The underground plant leakage drainage control system according to claim 1, characterized in that: The power supply line is also equipped with a main power detection module for detecting the power supply of single-phase lines.

3. The underground plant leakage drainage control system according to claim 1, characterized in that: The first water pump control module includes a first fuse, a first water pump control circuit, and a first water pump. The first fuse is connected to a power supply line, the output terminal of the first fuse is connected to the first water pump control circuit, and the output terminal of the first water pump control circuit is connected to the first water pump.

4. The underground plant leakage drainage control system according to claim 3, characterized in that: The first water pump control circuit includes: a soft starter, a manual / automatic switching switch, a stop button, a start button, a manual self-locking switch, a remote start / stop control switch, a running indicator light, a stop indicator light, and a fault indicator light.

5. The underground plant leakage drainage control system according to claim 1, characterized in that: The control box is equipped with a temperature and humidity control module, which includes: a power conversion circuit, a heating plate and a cooling fan, and a temperature and humidity controller. The power conversion circuit is connected to the power supply line through a fuse. The output terminal of the power conversion circuit is connected to the temperature and humidity controller. The output terminal of the temperature and humidity controller is connected to the heating plate and the cooling fan.

6. The underground plant leakage drainage control system according to claim 1, characterized in that: The liquid level monitoring module uses one or two of the following: a float-type signal source, a radar-type signal source, and a static pressure signal source.

7. The underground plant leakage drainage control system according to claim 6, characterized in that: The liquid level monitoring module is a float-type signal source, including four positions: low liquid level control feedback switch, low liquid level control feedback switch, high liquid level control feedback switch, and high liquid level control feedback switch.

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