An automatic water draining control device and method

Abstract

The present application belongs to the technical field of mine drainage, and specifically relates to an automatic drainage control device and method, which comprises a transformer TC, a first multi-element module MK1, a timer, a second multi-element module MK2, a first 80 explosion-proof switch KS1, a third multi-element module MK3, a second 80 explosion-proof switch KS2, a water level probe, and a power supply for the entire device; the present application realizes the automatic control of the coal mine drainage system by integrating components such as the transformer TC, the multi-element module, and the water level probe. The underground workers do not need to manually start the water pump, thereby greatly saving human resources. The multi-element module automatically adjusts the operating state of the water pump according to the water level information collected by the water level probe, ensuring the timeliness and accuracy of drainage. When the water level reaches the preset upper limit, the water pump is automatically started for drainage, effectively avoiding safety accidents caused by human negligence and improving the reliability and stability of the drainage system.

Description

Technical Field

[0001] This invention belongs to the field of mine drainage technology, specifically relating to an automatic drainage control device and method. Background Technology

[0002] In the coal mining industry, underground drainage systems are core facilities for mitigating water hazards and ensuring safe production underground. Currently, mine drainage systems mostly rely on manual monitoring or simple single-threshold automatic control modes, which have multiple technical shortcomings. Existing conventional automatic drainage devices rely solely on a single water level electrode to collect water level signals and can only start and stop water pumps based on a fixed water level threshold. They lack a multi-level water level stratified acquisition structure and cannot distinguish between different operating conditions such as normal water inrush, large-scale water inrush, and excessive water surge. When the water inrush volume increases sharply, the drainage response is lagging, which can easily lead to the safety hazard of water tank flooding.

[0003] Traditional control schemes lack a water level prediction mechanism, passively controlling pumps based solely on real-time water levels, making it impossible to predict water level rise trends in advance. Furthermore, they fail to consider multiple parameters such as peak and off-peak electricity prices, pump losses, and equipment insulation status for comprehensive decision-making, relying solely on water level signals to drive pumps. This results in high electricity costs due to concentrated drainage during peak hours. Additionally, the fixed rotation cycle of the main and backup pumps exacerbates mechanical wear and tear from prolonged operation of a single device, while idle backup pumps are susceptible to corrosion from the humid environment underground, leading to rapid deterioration of their insulation performance. Summary of the Invention

[0004] To address the aforementioned shortcomings of existing technologies, this invention provides an automatic drainage control device and method that integrates components such as transformers, multi-functional modules, and water level probes to achieve automated control of coal mine drainage systems.

[0005] In a first aspect, the present invention provides an automatic drainage control device, comprising a first multi-module MK1, a timer, a second multi-module MK2, a first 80 explosion-proof switch KS1, a third multi-module MK3, a second 80 explosion-proof switch KS2, and a water level probe. The input terminals of the first multi-functional module MK1, the second multi-functional module MK2, and the third multi-functional module MK3 are all connected to the water level probe. The second multi-functional module MK2 is connected to the first multi-functional module MK1 through a timer. The first multi-functional module MK1 and the third multi-functional module MK3 are both connected to the main water pump to be controlled through the first 80 explosion-proof switch KS1. The second multi-functional module MK2 and the third multi-functional module MK3 are connected to the standby water pump to be controlled through the second 80 explosion-proof switch KS2.

[0006] Secondly, the present invention provides an automatic drainage control method based on the automatic drainage control device described in any one of the above claims, comprising: S1. Real-time water level information in the mine water tank is collected by the lower limit water level probe, the first upper limit water level probe, the second upper limit water level probe, and the third upper limit water level probe, respectively, and the lower limit water level is obtained accordingly. First upper limit water level Second upper limit water level and the third upper limit water level And respectively transmitted to the first diversification module MK1, the second diversification module MK2 and the third diversification module MK3; wherein, ; S2. Based on the water level sequence data collected by the first upper limit water level probe, the second upper limit water level probe and the third upper limit water level probe within a preset sampling period, construct a dynamic prediction model for the rate of water level change and calculate the predicted water level value at the prediction time. S3. Combine the predicted water level, the current peak-valley-normal electricity price coefficient of the power grid, the pump operating efficiency parameters, and the equipment insulation degradation index to generate a combined decision value. S4. Compare the fused decision value with the preset multi-level decision threshold, and adaptively determine the start-up and shutdown status of the main water pump and / or the standby water pump based on the comparison result. S5. Based on timer control of the first multi-functional module MK1 and the second multi-functional module MK2, the rotation cycle of the main water pump and the standby water pump is dynamically adjusted according to the weighted evaluation results of the cumulative running time of the water pump and the insulation degradation index, and the main water pump is given priority to be started for pre-drainage during the power grid off-peak period. S6. Real-time monitoring of the contact temperature of the first 80 explosion-proof switch KS1 and the second 80 explosion-proof switch KS2, as well as the water pump motor current. When any parameter exceeds the corresponding fault warning threshold, the third multi-functional module MK3 is triggered to start the redundancy switching mechanism and dial an alarm through the dialer.

[0007] The beneficial effects of this invention are as follows: This invention achieves multi-level, layered automated control of a coal mine drainage system by integrating a first multi-functional module MK1, a second multi-functional module MK2, a third multi-functional module MK3, a timer, a first 80° explosion-proof switch KS1, a second 80° explosion-proof switch KS2, and a water level probe array including a lower limit water level probe, a first upper limit water level probe, a second upper limit water level probe, and a third upper limit water level probe. Through the vertical deployment of the four-level water level probes, the system can distinguish between different operating conditions such as normal water inrush, large-scale water inrush, and excessive water surge, and activate the main / standby water pump for drainage, significantly improving the reliability and stability of the drainage system.

[0008] This invention constructs a dynamic prediction model for water level change rate. Based on water level sequence data collected by the first, second, and third upper limit water level probes within a preset sampling period, it calculates the predicted water level value at the predicted time, realizing a shift from passive response to proactive prediction. This allows the system to detect water level rise trends in advance and schedule water pump operation accordingly. Simultaneously, this invention fuses the predicted water level value, the current peak-valley and off-peak electricity price coefficients of the power grid, water pump operating efficiency parameters, and equipment insulation degradation index to generate a fusion decision value. Based on this, it adaptively determines the start-up and shutdown status of the main water pump and / or standby water pump, achieving coordinated optimization of drainage control with power grid peak-valley periods, equipment energy efficiency, and health status. This effectively reduces the high electricity costs incurred by concentrated drainage during peak periods.

[0009] This invention controls the first multi-functional module MK1 and the second multi-functional module MK2 through timers, dynamically adjusting the rotation cycle of the main water pump and the standby water pump according to the weighted evaluation results of the cumulative operating time of the water pump and the insulation degradation index. During the off-peak hours of the power grid, the main water pump is prioritized to start for pre-drainage. This avoids the aggravated mechanical wear caused by the continuous operation of a single device for a long time, and also prevents the problem of rapid deterioration of the insulation performance of the idle standby water pump due to the humid environment underground. This ensures that both the main water pump and the standby water pump are in good standby condition, extends the service life of the equipment, and improves the overall safety performance of the system. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic block diagram of an apparatus according to an embodiment of the present invention.

[0012] Figure 2 This is a circuit schematic for a multi-module design.

[0013] Figure 3 This is a schematic flowchart illustrating a method according to an embodiment of the present invention. Detailed Implementation

[0014] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0015] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0016] like Figure 1 As shown, the present invention provides an automatic drainage control device, including a transformer TC, a first multi-functional module MK1, a timer, a second multi-functional module MK2, a first 80 explosion-proof switch KS1, a third multi-functional module MK3, a second 80 explosion-proof switch KS2, a water level probe, and a power supply for the entire device; the first multi-functional module MK1, the second multi-functional module MK2, and the third multi-functional module MK3 are all connected to the power supply through the transformer, and the input terminals of the first multi-functional module MK1, the second multi-functional module MK2, and the third multi-functional module MK3 are all connected to the water level probe; the second multi-functional module MK2 is connected to the first multi-functional module MK1 through the timer (this timer is also subject to unified scheduling by the third multi-functional module MK3, used to coordinate the pump rotation sequence and pre-drainage control during off-peak periods between the first multi-functional module MK1 and the second multi-functional module MK2); the first multi-functional module MK1 and the third multi-functional module MK3 are both connected to the main water pump to be controlled through the first 80 explosion-proof switch KS1 (which has an internal relay J1); the second multi-functional module MK2 and the third multi-functional module MK3 are connected to the standby water pump to be controlled through the second 80 explosion-proof switch KS2 (which has an internal relay J2).

[0017] This invention achieves automated control of coal mine drainage systems by integrating components such as a transformer (TC), diversified modules, and water level probes. It eliminates the need for underground workers to manually start water pumps, and eliminates the need for two to three people to take turns monitoring each drainage point, thus significantly saving manpower and reducing labor costs in coal mines.

[0018] In addition, the device includes a dialer. The dialer's input is connected to the output of the third multi-functional module MK3, and its output is connected to an external telephone. It uses a TD-110 automatic dialer, supports storing at least 8 phone numbers, and has a voice-announcement function for fault types. The dialer's input is connected to the relay output of the third multi-functional module MK3 via an intrinsically safe circuit. When the module detects a fault signal (e.g., pump overload, switch leakage, water level exceeding the upper limit by 3), the relay activates, triggering the dialer to start. The output is connected to an external communication network via a telephone line, supporting wired telephones or underground explosion-proof communication systems. The dialer has a built-in alarm priority queue. Fault alarms have higher priority than water level exceeding the limit alarm. When the dialer is dialing a low-priority alarm, if a high-priority alarm is triggered, the current dialing is interrupted and the system switches to the high-priority alarm. Alarms of the same priority are queued and executed in the order of their trigger time.

[0019] Its triggering logic is as follows: when the water level reaches the third upper limit water level, the third multi-functional module MK3 starts the main pump and the backup pump at the same time and sends an alarm signal to the dialer; when a pump or switch failure is detected (such as abnormal current or insulation resistance below the threshold), the dialer starts immediately and dials the duty personnel's phone number in a preset sequence until the call is connected.

[0020] Specifically, the water level probe includes a lower limit water level probe, a first upper limit water level probe, a second upper limit water level probe, and a third upper limit water level probe. The common terminal of the first multi-functional module MK1, the common terminal of the second multi-functional module MK2, and the common terminal of the third multi-functional module MK3 are all connected to the lower limit water level probe. The input terminal of the first multi-functional module MK1 is connected to the first upper limit water level probe, the input terminal of the second multi-functional module MK2 is connected to the second upper limit water level probe, and the input terminal of the third multi-functional module MK3 is connected to the third upper limit water level probe.

[0021] Furthermore, protective resistors are installed between the common terminal of the first multi-module MK1, the common terminal of the second multi-module MK2, and the common terminal of the third multi-module MK3 and the lower limit water level probe. The protective resistors, together with the water level electrode and the microcontroller chip U3 inside the multi-module, form a voltage divider circuit. This circuit limits the loop current to prevent electrical sparks from occurring when the water level probe has poor contact, while also preventing high-potential surges from damaging the integrated chip.

[0022] The first 80 explosion-proof switch KS1 is equipped with a relay J1. The coil of the relay J1 receives the output signals of the first multi-functional module MK1 and the third multi-functional module MK3. When the first multi-functional module MK1 and the third multi-functional module MK3 output simultaneously, the output signal of the third multi-functional module MK3 has priority control.

[0023] The water level probes use stainless steel electrodes and consist of one lower limit water level probe and three upper limit water level probes, corresponding to the first, second, and third upper limit water levels, respectively. The common terminal (COM) of the three multi-functional modules (first, second, and third) is connected to the lower limit water level probe via wires, forming a common ground loop. The input of the first multi-functional module MK1 is connected to the first upper limit water level probe to detect the lowest level upper limit water level. The input of the second multi-functional module MK2 is connected to the second upper limit water level probe to detect the intermediate upper limit water level. The input of the third multi-functional module MK3 is connected to the third upper limit water level probe to detect the highest level upper limit water level (extreme water level exceeding the limit scenario).

[0024] like Figure 2 As shown, the multi-functional module includes a rectifier U1, a filter capacitor C1, a voltage regulator U2, a relay K1, a freewheeling diode D1, a microcontroller chip U3, a resistor R1, a capacitor C2, a resistor R2, a capacitor C3, a resistor R3, and a transistor Q1. The first and second terminals of the rectifier U1 are connected to the secondary side of the transformer, the third terminal of the rectifier U1 is grounded, and the fourth terminal of the rectifier U1 is connected to the first terminal of the filter capacitor C1 and the input terminal of the voltage regulator U2. The output terminal of the voltage regulator U2 is connected to the negative terminal of the freewheeling diode D1, the first terminal of the relay K1 coil, the first terminal of the resistor R1, and the first terminal of the microcontroller chip U3. Pins 1 and 2 of the microcontroller U3 are connected to the second terminal of resistor R1 and the first terminal of resistor R2. Pin 4 of the microcontroller U3 is connected to the first terminal of capacitor C2, the first terminal of resistor R2, and the fifth pin of the water level probe microcontroller U3 is grounded through capacitor C3. Pin 6 of the microcontroller U3 is connected to the base of transistor Q1 through resistor R3. The collector of transistor Q1 is connected to the second terminal of relay K1 coil and the positive terminal of freewheeling diode D1. The emitter of transistor Q1, the second terminal of filter capacitor C1, the second terminal of capacitor C2, and the second terminal of resistor R2 are all grounded. The microcontroller U3 uses an STM32F103 integrated chip. The ground wire serves as the common terminal of the multi-functional module. The normally open switch of relay K1 coil is connected to an 80 switch, serving as the output terminal of the multi-functional module.

[0025] For example, the rectifier uses a bridge rectifier circuit of model KBPC3510. The voltage regulator U2 uses a three-terminal voltage regulator chip 7812 to stabilize the rectified voltage to DC 12V, powering the microcontroller chip U3 and the relay. The relay K1 is a 12V DC relay, such as model HH52P, with a contact capacity of 5A / 250VAC, used to control the start and stop of the water pump motor.

[0026] The microcontroller chip U3 is a microcontroller chip with a built-in AD conversion module, EEPROM storage module and UART communication interface, such as the integrated chip of model STM32F103, PIC16F877 or ATmega328; the I / O ports of the microcontroller chip U3 are connected to the water level probe and various sensors to execute water level prediction algorithms, calculate fusion decision values ​​and store data logic.

[0027] The device also includes a sensor group, which includes a temperature sensor located at the contacts of the first 80 explosion-proof switch KS1 and the second 80 explosion-proof switch KS2, a micro-ohmmeter connected in series in the contact circuit, a current transformer and a voltage transformer located at the output end of the water pump motor, an electromagnetic flowmeter located on the water pump drainage pipeline, and a temperature and humidity sensor for collecting the ambient humidity in the well. All sensors are connected to the AD conversion pin of the corresponding multi-functional module microcontroller chip U3.

[0028] Preferably, both the first 80 explosion-proof switch KS1 and the second 80 explosion-proof switch KS2 are mining 80 switches of model QBZ-80.

[0029] Figure 3 This is a schematic flowchart of an automatic drainage control method based on any of the above-described automatic drainage control devices, provided by the present invention. The order of the steps in this flowchart may be changed, and some steps may be omitted, depending on different requirements.

[0030] like Figure 3 As shown, the method includes: S1. Real-time water level information in the mine water tank is collected by the lower limit water level probe, the first upper limit water level probe, the second upper limit water level probe, and the third upper limit water level probe, respectively, and the lower limit water level is obtained accordingly. First upper limit water level Second upper limit water level and the third upper limit water level And respectively transmitted to the first diversification module MK1, the second diversification module MK2 and the third diversification module MK3; wherein, ; S2. Based on the water level sequence data collected by the first upper limit water level probe, the second upper limit water level probe and the third upper limit water level probe within a preset sampling period, construct a dynamic prediction model for the rate of water level change and calculate the predicted water level value at the prediction time. S3. Combine the predicted water level, the current peak-valley-normal electricity price coefficient of the power grid, the pump operating efficiency parameters, and the equipment insulation degradation index to generate a combined decision value. S4. Compare the fused decision value with the preset multi-level decision threshold, and adaptively determine the start-up and shutdown status of the main water pump and / or the standby water pump based on the comparison result. S5. Based on timer control of the first multi-functional module MK1 and the second multi-functional module MK2, the rotation cycle of the main water pump and the standby water pump is dynamically adjusted according to the weighted evaluation results of the cumulative running time of the water pump and the insulation degradation index, and the main water pump is given priority to be started for pre-drainage during the power grid off-peak period. S6. Real-time monitoring of the contact temperature of the first 80 explosion-proof switch KS1 and the second 80 explosion-proof switch KS2, as well as the water pump motor current. When any parameter exceeds the corresponding fault warning threshold, the third multi-functional module MK3 is triggered to start the redundancy switching mechanism and dial an alarm through the dialer.

[0031] To facilitate understanding of the present invention, the following description further illustrates the automatic drainage control method based on the automatic drainage control device described above, using the principle of the automatic drainage control method based on any of the above-mentioned automatic drainage control devices, and in conjunction with the process of automatically draining mine water pumps based on the automatic drainage control device described above in the embodiments.

[0032] First, step S1 includes: S11. Install the lower limit water level probe, the first upper limit water level probe, the second upper limit water level probe, and the third upper limit water level probe in the vertical direction from bottom to top in the mine water tank. The lower limit water level probe is installed at a safe distance above the suction port of the drainage pump at the bottom of the water tank. The first upper limit water level probe is installed at a position lower than the first preset height of the maximum allowable water level of the water tank. The second upper limit water level probe is installed at a position lower than the second preset height of the maximum allowable water level of the water tank. The third upper limit water level probe is installed at the maximum allowable water level of the water tank, and the first preset height is greater than the second preset height, so that the lower limit water level probe, the first upper limit water level probe, the second upper limit water level probe, and the third upper limit water level probe form a four-level water level monitoring node. S12, the lower limit water level probe, the first upper limit water level probe, the second upper limit water level probe, and the third upper limit water level probe are in contact with the water in the mine water tank through stainless steel electrodes. The common terminal of the first multi-module MK1, the common terminal of the second multi-module MK2, and the common terminal of the third multi-module MK3 are all connected to the lower limit water level probe through a protective resistor. When the water submerges the corresponding water level probe, the conductivity of the water is used to generate a conduction current in the electrode circuit of the corresponding water level probe. The first multi-module MK1, the second multi-module MK2, and the third multi-module MK3 are connected to the lower limit water level probe through their respective common terminals, and are connected to the first upper limit water level probe, the second upper limit water level probe, and the third upper limit water level probe through their respective input terminals to collect the conduction status signal of the corresponding water level probe. S13, the microcontroller U3 inside the first multi-functional module MK1, the second multi-functional module MK2, and the third multi-functional module MK3 converts the acquired conduction status signal into a digital water level signal, and calculates the corresponding water level value based on the installation elevation of the lower limit water level probe, the first upper limit water level probe, the second upper limit water level probe, and the third upper limit water level probe. The water level value corresponding to the lower limit water level probe is recorded as the lower limit water level. The water level value corresponding to the first upper limit water level probe is recorded as the first upper limit water level. The water level value corresponding to the second upper limit water level probe is recorded as the second upper limit water level. The water level value corresponding to the third upper limit water level probe is recorded as the third upper limit water level. And satisfy ; S14, the first diversified module MK1 will reach the first upper limit water level. and lower limit water level The data is transmitted to the second diversification module MK2, which will then set the second upper limit water level. and the first upper limit water level received The data is transmitted to the third diversification module MK3, which receives the third upper limit water level. Second upper limit water level and the first upper limit water level Furthermore, the water level signal is filtered within each of the various modules to eliminate signal jitter caused by water fluctuations. The filtering process employs a first-order inertial filtering algorithm. ; in, The filtered water level value at time t is in meters (m). The original water level value collected at time t by the lower limit water level probe, the first upper limit water level probe, the second upper limit water level probe, or the third upper limit water level probe, in meters; These are the filter coefficients, with values ​​ranging from 0.1 to 0.3; for The filtered water level value at any given time is in meters (m); Δt is the sampling period, ranging from 1 minute to 5 minutes. S15, the first diversified module MK1, based on the filtered first upper limit water level and lower limit water level The comparison results determine the first-level water level status, and the second multi-functional module MK2 determines the second upper limit water level based on the filtered result. With the first upper limit water level The comparison results determine the second-level water level status, and the third multi-functional module MK3 determines the third upper limit water level based on the filtered result. With the second upper limit water level The comparison results determine the third-level water level status, and the water level status signals of each level are output to the corresponding first 80 explosion-proof switch KS1 or second 80 explosion-proof switch KS2.

[0033] In addition, step S2 includes: S21. Receive water level sequence data collected by the first upper limit water level probe, the second upper limit water level probe, and the third upper limit water level probe within a preset sampling period. The water level sequence data includes the first upper limit water level value collected by the first upper limit water level probe at different times, the second upper limit water level value collected by the second upper limit water level probe at different times, and the third upper limit water level value collected by the third upper limit water level probe at different times. Store the water level sequence data in the registers of the first multi-functional module MK1, the second multi-functional module MK2, and the third multi-functional module MK3 in chronological order. S22. Calculate the baseline value of the water level change rate based on the water level values ​​at two adjacent sampling times in the water level sequence data. The formula for calculating the baseline value of the water level change rate is: ; in, H(t) represents the baseline value of the water level change rate at time t, in m / min; H(t) represents the water level value collected at time t by the first, second, or third upper limit water level probe, in meters; H(t) Δt) represents the corresponding water level probe at... The water level value is collected in real time, and the unit is meters. S23. The basic value of the water level change rate is smoothed by an exponentially weighted moving average to obtain the smoothed water level change rate. The calculation formula for the smoothing process is as follows: ; in, t represents the smoothed rate of change of water level at time t, in m / min; This is a smoothing coefficient, with a value ranging from 0.3 to 0.7. for The smoothed rate of change of water level at any given time, in m / min; S24. Calculate the acceleration of water level change based on the smoothed rate of change of water level. The formula for calculating the acceleration of water level change is: ; in, Let be the acceleration of the water level change at time t, in units of . ; S25. Based on the smoothed rate of water level change and the acceleration of water level change, a dynamic prediction model for the rate of water level change is constructed. The predicted water level value at the prediction time is calculated using the dynamic prediction model for the rate of water level change. The formula for calculating the predicted water level value is as follows: ; in, H(t) is the predicted water level at time t+Δt, in meters; H(t) is the measured water level at time t collected by the first upper limit water level probe, the second upper limit water level probe, or the third upper limit water level probe, in meters.

[0034] Next, step S3 includes: S31, the third diversified module MK3 reads the current time through its built-in real-time clock chip and matches it with the pre-stored peak-valley and normal-time electricity price table to determine the real-time electricity price corresponding to the current time. It then calculates the current peak-valley and normal-time electricity price coefficient based on the ratio of the real-time electricity price to the preset daily average electricity price. The formula for calculating the current peak-valley and normal-time electricity price coefficient is as follows: ; in, Let t be the peak-valley-normal electricity price coefficient of the power grid at time t; The real-time electricity price at time t is expressed in yuan / kWh. The preset daily average electricity price is expressed in yuan / kWh. S32. The first multi-functional module MK1 or the second multi-functional module MK2 collects the operating current and voltage of the water pump motor through the current transformer and voltage transformer installed at the output terminal of the first 80 explosion-proof switch KS1 or the second 80 explosion-proof switch KS2, calculates the water pump input power, and collects the actual drainage flow rate through the electromagnetic flow meter installed at the outlet of the water pump drainage pipeline. Combined with the drainage head, the water pump operating efficiency parameters are calculated. The calculation formula for the water pump operating efficiency parameters is: ; in, Let be the pump operating efficiency parameter of the i-th pump; The density of the mine water; It is the acceleration due to gravity; The actual drainage flow rate of the i-th pump is expressed in units of... ; The pump head is the unit of water discharge head, expressed in meters (m). Let be the input power of the i-th water pump, in kW; S33, the first multi-functional module MK1 or the second multi-functional module MK2 records the cumulative running time of the water pump through a built-in timer, detects the impact characteristics of the water pump motor starting current through a current sensor to count the cumulative number of starts, and collects the relative humidity of the underground environment through a temperature and humidity sensor. Based on the cumulative running time of the water pump, the cumulative number of starts, and the relative humidity of the underground environment, the insulation degradation index of the equipment is calculated. The formula for calculating the insulation degradation index of the equipment is: ; in, Let be the equipment insulation degradation index of the i-th water pump; The initial insulation state reference value ranges from 0 to 0.1. The cumulative operating time of the i-th water pump is expressed in hours. This represents the cumulative number of times the i-th water pump has been started. The relative humidity of the underground environment; The runtime degradation weighting coefficient ranges from 0.001 to 0.005 / h. The degradation weighting coefficient for the number of startups ranges from 0.01 to 0.05 per startup. The environmental humidity degradation weighting coefficient ranges from 0.001 to 0.003%. S34. The predicted water level value calculated in step S2 Compared with the current peak-valley and normal-time electricity price coefficient of the power grid Pump operating efficiency parameters and equipment insulation degradation index Multi-parameter fusion is performed to generate fused decision values. The formula for calculating the fused decision values ​​is as follows: ; in, To integrate decision values; The predicted water level is the value at the predicted time t+Δt. The lower limit water level obtained in step S1; The third upper limit water level obtained in step S1; This is the weighting coefficient for water level prediction, with a value ranging from 0.3 to 0.5; This is the electricity price weighting coefficient, with a value ranging from 0.2 to 0.3; This is the efficiency weighting coefficient, with a value ranging from 0.15 to 0.25; This is the insulation state weighting coefficient, with a value ranging from 0.1 to 0.2, and it satisfies... .

[0035] The peak-valley and normal-hour electricity price table (Table 1) is pre-stored in the external non-volatile memory EEPROM of the microcontroller chip U3 of the third diversified module MK3.

[0036] Table 1: Electricity Prices During Peak, Valley, and Normal Times in the Power Grid

[0037] Additionally, step S4 includes: S41. Set the first-level decision threshold corresponding to the first upper limit water level. The second-level decision threshold corresponding to the second upper limit water level And the third-level decision threshold corresponding to the third upper limit water level The formula for calculating the first-level decision threshold is: ; in, This is the first-level decision threshold; The first upper limit water level obtained in step S1; The lower limit water level obtained in step S1; The third upper limit water level obtained in step S1; These are the water level prediction weight coefficient, electricity price weight coefficient, efficiency weight coefficient, and insulation status weight coefficient in step S3, respectively. The preset daily average electricity price in step S3; Peak hour electricity price; This refers to the rated efficiency of the water pump. This is the early warning threshold for insulation degradation; Second-level decision threshold and the third-level decision threshold The calculation formulas are as follows: ; ; in, This is the threshold for the second-level decision; This is the third-level decision threshold; The second upper limit water level obtained in step S1; S42. The fusion decision value calculated in step S3 is... Each with the first-level decision threshold Second-level decision threshold and the third-level decision threshold The system compares the results and adaptively determines the start / stop status of the main pump and / or the standby pump based on the comparison. When the fusion decision value Less than the first-level decision threshold And the real-time water level value obtained in step S1 is greater than or equal to the first upper limit water level. At that time, the first multi-functional module MK1 starts the main water pump to drain water through the first 80 explosion-proof switch KS1; When the fusion decision value Greater than or equal to the first-level decision threshold And less than the second-level decision threshold And the real-time water level is greater than or equal to the second upper limit water level. At that time, the second multi-functional module MK2 starts the backup water pump to drain water through the second 80 explosion-proof switch KS2; When the fusion decision value Greater than or equal to the third-level decision threshold Or the real-time water level is greater than or equal to the third upper limit water level. At that time, the third multi-functional module MK3 simultaneously starts the main water pump and the standby water pump to drain water through the first 80 explosion-proof switch KS1 and the second 80 explosion-proof switch KS2, and dials an alarm through the dialer.

[0038] In addition, the water level status signals at each level output in step S15 above are preliminary warning signals, used to trigger the corresponding multi-functional module to start the fusion decision calculation in steps S2-S4; the final pump start-stop control is determined by the fusion decision value judgment result in step S42. When the two judgment results are consistent, it is executed directly; when step S15 determines that the limit is exceeded but step S42 does not meet the conditions, the corresponding pump is started according to the result of step S15 and marked as "emergency mode", and the abnormality is recorded for subsequent analysis; when the real-time water level reaches the third upper limit water level, the system forcibly ignores the fusion decision value calculation result and directly executes the third-level control logic of step S42, that is, when the third multi-functional module MK3 detects the third upper limit water level and outputs a signal, the system forcibly ignores the fusion decision value calculation result and directly starts the main pump and the standby pump simultaneously through hardware priority, and triggers the dial alarm.

[0039] Then, step S5 includes: S51. The comprehensive operating evaluation index of the water pump is calculated by weighting and integrating the cumulative operating time of the water pump and the insulation degradation index of the equipment. The formula for calculating the comprehensive operating evaluation index of the water pump is as follows: ; in, The comprehensive operation evaluation index of the i-th water pump; These are the weighting coefficients for operating time assessment, insulation degradation assessment, and start-up count assessment, respectively, which satisfy... ; The cumulative running time of the i-th water pump; This refers to the maximum permissible continuous operating time of the water pump. Let be the insulation degradation index of the i-th water pump. This represents the cumulative number of times the i-th water pump has been started. This represents the maximum number of times the water pump can be started. S52. Calculate the difference in the comprehensive operation evaluation index between the main pump and the standby pump based on their respective comprehensive operation evaluation indices, and dynamically adjust the rotation cycle of the main pump and the standby pump based on this difference. The formula for calculating the rotation cycle is as follows: ; in, The rotation cycle is dynamically adjusted. The preset basic rotation cycle ranges from 24 hours to 72 hours. This is the rotation cycle adjustment coefficient, with a value ranging from 0.5 to 2.0; The difference in the comprehensive operation evaluation index between the main water pump and the standby water pump. The comprehensive performance evaluation index of the main water pump. The comprehensive operational evaluation index of the water pump is for the standby water pump; S53, Control the first multi-functional module MK1 and the second multi-functional module MK2 via a timer: When the continuous operating time of the main water pump or the standby water pump reaches the rotation cycle At that time, the main water pump and the standby water pump are switched alternately. Before the switchover, the third multi-functional module MK3 determines whether the current time is during a power grid off-peak period based on the current time read by the built-in real-time clock chip. If it is determined that the current time is during a power grid off-peak period and the water level prediction value is... Greater than or equal to the first upper limit water level If the main water pump is currently stopped and the standby water pump is not running, the main water pump will be started to pre-drain the water and lower the water level to the lower limit level. The above-mentioned safety margin water levels are located at [specific locations]. The formula for calculating the safety margin water level is as follows: ; in, For a safe margin of water level; The lower limit water level is obtained in step S1. After pre-drainage is completed, if the rotation cycle has not been reached, the main water pump is kept running at low power or shut down and on standby; if the rotation cycle has been reached, the main and standby pumps are switched. The rate of water level drop is monitored in real time during pre-drainage. If the pre-drainage time exceeds 80% of the remaining time in the valley period, the pre-drainage is terminated in advance and the abnormality is recorded.

[0040] Finally, step S6 includes: S61. Temperature sensors are installed at the contact positions of the first 80 explosion-proof switch KS1 and the second 80 explosion-proof switch KS2. The contact temperature sequence data of the first 80 explosion-proof switch KS1 and the second 80 explosion-proof switch KS2 are collected in real time according to a preset sampling period. The contact temperature rise rate is calculated based on the contact temperature values ​​at two adjacent sampling times. The formula for calculating the contact temperature rise rate is: ; in, This refers to the contact temperature rise rate; Let t be the contact temperature at time t; for The contact temperature at time Δt; Δt is the preset sampling period in step S2; S62. Three-phase current sensors are installed at the output terminals of the first 80 explosion-proof switch KS1 and the second 80 explosion-proof switch KS2, respectively. The pump motor current sequence data of the main water pump and the standby water pump are collected according to a preset sampling period. The deviation ratio between the maximum value and the average value of the three-phase current corresponding to the pump motor current sequence data is calculated as the motor current imbalance. The formula for calculating the motor current imbalance is: ; in, This refers to the motor current imbalance. It is the maximum value among the three-phase currents; This is the average value of the three-phase current; S63. Compare the contact temperature rise rate and motor current imbalance with the corresponding fault warning thresholds respectively. When the contact temperature rise rate is greater than the contact temperature rise rate threshold or the motor current imbalance is greater than the current imbalance threshold, it is determined to be an abnormal state and triggers redundancy switching and alarm. The fault warning threshold is set as follows: contact temperature rise rate threshold. Values Current imbalance threshold Values ; S64. When an abnormal state is detected, the third multi-functional module MK3 starts the backup water pump through the second 80 explosion-proof switch KS2, and simultaneously disconnects the first 80 explosion-proof switch KS1 to stop the main water pump. It then uses a dialer to repeatedly dial the duty personnel's phone number in a preset sequence until a connection is established, thus achieving the linkage between the redundancy switching mechanism and the dialing alarm. When the third multi-functional module MK3 is triggered, it automatically blocks the output signals of the first multi-functional module MK1 and the second multi-functional module MK2, ensuring that MK3 has sole control over the first and second 80 explosion-proof switches KS1 and KS2. Furthermore, the dialer has a built-in alarm priority queue, with fault alarms having higher priority than water level over-limit alarms. When the dialer is dialing a low-priority alarm, if a high-priority alarm is triggered, the current dialing is interrupted and the system switches to the high-priority alarm. Alarms of the same priority are queued and executed in the order of their trigger time.

[0041] Although the present invention has been described in detail with reference to the accompanying drawings and preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made to the embodiments of the present invention by those skilled in the art without departing from the spirit and essence of the invention, and such modifications or substitutions should all be within the scope of the present invention. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should also be covered within the protection scope of the present invention.

Claims

1. An automatic drainage control device, characterized in that, It includes a first multi-functional module MK1, a timer, a second multi-functional module MK2, a first 80 explosion-proof switch KS1, a third multi-functional module MK3, a second 80 explosion-proof switch KS2, and a water level probe; The input terminals of the first multi-functional module MK1, the second multi-functional module MK2, and the third multi-functional module MK3 are all connected to the water level probe. The second multi-functional module MK2 is connected to the first multi-functional module MK1 through a timer. The first multi-functional module MK1 and the third multi-functional module MK3 are both connected to the main water pump to be controlled through the first 80 explosion-proof switch KS1. The second multi-functional module MK2 and the third multi-functional module MK3 are connected to the standby water pump to be controlled through the second 80 explosion-proof switch KS2.

2. The automatic drainage control device according to claim 1, characterized in that, The water level probe includes a lower limit water level probe, a first upper limit water level probe, a second upper limit water level probe, and a third upper limit water level probe. The common terminal of the first multi-functional module MK1, the common terminal of the second multi-functional module MK2, and the common terminal of the third multi-functional module MK3 are all connected to the lower limit water level probe. The input terminal of the first multi-functional module MK1 is connected to the first upper limit water level probe, the input terminal of the second multi-functional module MK2 is connected to the second upper limit water level probe, and the input terminal of the third multi-functional module MK3 is connected to the third upper limit water level probe.

3. The automatic drainage control device according to claim 2, characterized in that, Protective resistors are installed between the common terminal of the first multi-module MK1, the common terminal of the second multi-module MK2, and the common terminal of the third multi-module MK3 and the lower limit water level probe.

4. The automatic drainage control device according to claim 3, characterized in that, The multi-functional module includes rectifier U1, filter capacitor C1, voltage regulator U2, relay K1, freewheeling diode D1, microcontroller chip U3, resistor R1, capacitor C2, resistor R2, capacitor C3, resistor R3 and transistor Q1; The first and second terminals of rectifier U1 are connected to the secondary side of the transformer. The third terminal of rectifier U1 is grounded. The fourth terminal of rectifier U1 is connected to the first terminal of filter capacitor C1 and the input terminal of voltage regulator U2. The output terminal of voltage regulator U2 is connected to the negative terminal of freewheeling diode D1, the first terminal of relay K1 coil, the first terminal of resistor R1, and the first and second pins of microcontroller chip U3. The third pin of microcontroller chip U3 is connected to the second terminal of resistor R1 and the first terminal of resistor R2. The fourth pin of microcontroller chip U3 is connected to the first terminal of capacitor C2. The first end of resistor R2 is connected to the water level probe. The fifth pin of microcontroller chip U3 is grounded through capacitor C3. The sixth pin of microcontroller chip U3 is connected to the base of transistor Q1 through resistor R3. The collector of transistor Q1 is connected to the second end of relay K1 coil and the positive terminal of freewheeling diode D1. The emitter of transistor Q1, the second end of filter capacitor C1, the second end of capacitor C2, and the second end of resistor R2 are all grounded. The ground wire serves as the common terminal of the multi-functional module. The normally open switch of relay K1 coil is connected to 80 switch, serving as the output terminal of the multi-functional module.

5. The automatic drainage control device according to claim 1, characterized in that, It also includes a dialer, the input of which is connected to the output of the third multi-function module MK3, and the output of which is connected to an external telephone.

6. An automatic drainage control method based on the automatic drainage control device according to any one of claims 1-5, characterized in that, include: S1. Real-time water level information in the mine water tank is collected by the lower limit water level probe, the first upper limit water level probe, the second upper limit water level probe, and the third upper limit water level probe, respectively, and the corresponding lower limit water level is obtained. First upper limit water level Second upper limit water level and the third upper limit water level And respectively transmitted to the first diversification module MK1, the second diversification module MK2 and the third diversification module MK3; wherein, ; S2. Based on the water level sequence data collected by the first upper limit water level probe, the second upper limit water level probe and the third upper limit water level probe within a preset sampling period, construct a dynamic prediction model for the rate of water level change and calculate the predicted water level value at the prediction time. S3. Combine the predicted water level, the current peak-valley-normal electricity price coefficient of the power grid, the pump operating efficiency parameters, and the equipment insulation degradation index to generate a combined decision value. S4. Compare the fused decision value with the preset multi-level decision threshold, and adaptively determine the start-up and shutdown status of the main water pump and / or the standby water pump based on the comparison result. S5. Based on timer control of the first multi-functional module MK1 and the second multi-functional module MK2, the rotation cycle of the main water pump and the standby water pump is dynamically adjusted according to the weighted evaluation results of the cumulative running time of the water pump and the insulation degradation index, and the main water pump is given priority to be started for pre-drainage during the power grid off-peak period. S6. Real-time monitoring of the contact temperature of the first 80 explosion-proof switch KS1 and the second 80 explosion-proof switch KS2, as well as the water pump motor current. When any parameter exceeds the corresponding fault warning threshold, the third multi-functional module MK3 is triggered to start the redundancy switching mechanism and dial an alarm through the dialer.

7. The automatic drainage control method according to claim 6, characterized in that, Step S3 includes: S31, the third diversified module MK3 reads the current time through the built-in real-time clock chip, matches the time period attributes with the pre-stored power grid peak-valley and normal-time electricity price table, determines the real-time electricity price corresponding to the current time, and calculates the current power grid peak-valley and normal-time electricity price coefficient based on the ratio of the real-time electricity price to the preset daily average electricity price. S32. The first multi-functional module MK1 or the second multi-functional module MK2 collects the operating current and operating voltage of the water pump motor through the current transformer and voltage transformer set at the output terminal of the first 80 explosion-proof switch KS1 or the second 80 explosion-proof switch KS2, calculates the input power of the water pump, and collects the actual drainage flow through the electromagnetic flow meter set at the outlet of the water pump drainage pipeline, and calculates the water pump operating efficiency parameters in combination with the drainage head. S33, the first multi-functional module MK1 or the second multi-functional module MK2 records the cumulative running time of the water pump through the built-in timer, detects the impact characteristics of the starting current of the water pump motor through the current sensor to count the cumulative number of starts, and collects the relative humidity of the underground environment through the temperature and humidity sensor. Based on the cumulative running time of the water pump, the cumulative number of starts and the relative humidity of the underground environment, the equipment insulation degradation index is calculated. S34. The predicted water level is fused with the current peak-valley-normal electricity price coefficient of the power grid, the pump operating efficiency parameters, and the equipment insulation degradation index to generate a fused decision value.

8. The automatic drainage control method according to claim 7, characterized in that, The formula for calculating the fusion decision value is: ； in, To integrate decision values; The predicted water level is the value at the predicted time t+Δt. The lower limit water level obtained in step S1; The third upper limit water level obtained in step S1; For water level prediction weighting coefficients; This is the electricity price weighting coefficient; Efficiency weighting coefficient; Let be the insulation state weighting coefficient, and satisfy . .

9. The automatic drainage control method according to claim 8, characterized in that, Step S4 includes: S41. Set the first-level decision threshold corresponding to the first upper limit water level. The second-level decision threshold corresponding to the second upper limit water level And the third-level decision threshold corresponding to the third upper limit water level ; S42. The fusion decision value calculated in step S3 is... Each with the first-level decision threshold Second-level decision threshold and the third-level decision threshold The system compares the results and adaptively determines the start / stop status of the main pump and / or standby pump based on the comparison. When the fusion decision value Less than the first-level decision threshold And the real-time water level value obtained in step S1 is greater than or equal to the first upper limit water level. At that time, the first multi-functional module MK1 starts the main water pump to drain water through the first 80 explosion-proof switch KS1; When the fusion decision value Greater than or equal to the first-level decision threshold And less than the second-level decision threshold And the real-time water level is greater than or equal to the second upper limit water level. At that time, the second multi-functional module MK2 starts the backup water pump to drain water through the second 80 explosion-proof switch KS2; When the fusion decision value Greater than or equal to the third-level decision threshold Or the real-time water level is greater than or equal to the third upper limit water level. At that time, the third multi-functional module MK3 simultaneously starts the main water pump and the standby water pump to drain water through the first 80 explosion-proof switch KS1 and the second 80 explosion-proof switch KS2, and dials an alarm through the dialer.

10. The automatic drainage control method according to claim 6, characterized in that, Step S5 includes: S51. Calculate the comprehensive operation evaluation index of the water pump by weighted fusion based on the cumulative operating time of the water pump and the insulation degradation index of the equipment. S52. Calculate the difference in the comprehensive operation evaluation index between the main pump and the standby pump based on their respective comprehensive operation evaluation indices, and dynamically adjust the rotation cycle of the main pump and the standby pump based on this difference. The formula for calculating the rotation cycle is as follows: ； in, The rotation cycle is dynamically adjusted. The preset basic rotation cycle; This is the rotation cycle adjustment coefficient; The difference in the comprehensive operation evaluation index between the main water pump and the standby water pump. The comprehensive performance evaluation index of the main water pump. The comprehensive operational evaluation index of the standby water pump; S53, Control the first multi-functional module MK1 and the second multi-functional module MK2 via a timer: When the continuous operating time of the main water pump or the standby water pump reaches the rotation cycle At that time, the main water pump and the standby water pump are switched alternately. Before the switch, the third multi-functional module MK3 determines whether the current time is during the power grid off-peak period based on the current time read by the built-in real-time clock chip. If it is determined that the current time is during the power grid off-peak period and the water level prediction value is greater than or equal to the first upper limit water level, if the current main water pump is in a stopped state and the standby water pump is not running, the main water pump is started to pre-drain water and lower the water level to a safe margin level above the lower limit water level.

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