Water collecting device for mine emergency drainage, optimal control system and air suction protection method

Abstract

The invention provides a water collecting device for mine emergency drainage. The water collecting device comprises a water collecting cover, a submersible pump, a motor, an overflowing unit, a double-magnetic floating ball liquid level switch and a photoelectric liquid level sensor. And the double-magnetic floating ball liquid level switch and the photoelectric liquid level sensor are respectively arranged at the middle upper part and the upper part of the outer side of the water collecting cover. The invention further provides an optimal control system for mine emergency drainage. The optimal control system comprises the water collecting device for mine emergency drainage, a flow sensor, a pressure sensor, a temperature sensor, a current sensor, a control center and a monitoring and early warning center. The invention further provides an air suction protection method for mine emergency drainage. The method comprises the steps that the first control signal controls the motor to stop working; the yellow indicating lamp is controlled by the second control signal; the green indicating lamp and the motor are controlled to start by the third control signal; and the fourth control signal controls a red indicating lamp to early warn the water level. The technical scheme has the characteristics of high safety, good real-time performance, high response speed, high efficiency and the like, and can be widely applied to the field of mining industry.

Description

Technical Field

[0001] The invention relates to mine emergency drainage technology, and in particular to a water collecting device, an optimization control system and a vacuum protection method for mine emergency drainage. Background Art

[0002] As we all know, my country's coal mines have complex hydrogeological conditions, and serious water seepage accidents occur from time to time. Mine floods have become the second largest disaster in coal mine accidents. When a flood occurs, the traditional emergency drainage method mainly uses submersible pumps for drainage. Due to the size and space limitations of the tunnel, the submersible pump is only placed in the shaft for drainage. At this time, the water in the deep tunnel cannot be discharged normally. In addition, when using the above traditional drainage method, if the water level in the water collection device is lower than the water inlet of the submersible pump, the water pump will be sucked empty, which is very likely to cause failure and damage to the submersible pump. Long-term inspection and maintenance are required in the later stage, which cannot win rescue time for emergency drainage, but instead brings greater safety and hidden dangers to mine rescue.

[0003] It can be seen that in the prior art, there is no mine emergency drainage equipment and method with high safety, fast emergency drainage response speed and high emergency drainage efficiency. Summary of the invention

[0004] In view of this, the main purpose of the present invention is to provide a mine emergency drainage water collection device, an optimized control system and a vacuum protection method with high safety, fast emergency drainage response speed and high emergency drainage efficiency.

[0005] In order to achieve the above object, the first technical solution proposed by the present invention is: A water collection device for mine emergency drainage, comprising: a water collection cover for collecting mine water in a water tank at the bottom of a mine shaft; a submersible pump for pumping out the mine water in the water collection cover; a motor for driving the submersible pump; a flow unit for controlling the water flow of the submersible pump to ensure the normal operation of the submersible pump; two double magnetic float liquid level switches for detecting whether the real-time water level of the mine water in the water collection cover is less than a low water level, between a low water level and a middle water level, or between a middle water level and a high water level, and sending the generated upper switch signal and lower switch signal to an external control system; three photoelectric liquid level sensors for detecting whether the real-time water level of the mine water in the water collection cover is higher than a high water level, and sending the generated fourth control signal to an external control system; wherein, The submersible pump and the flow unit are connected through a water suction port, and the submersible pump, the flow unit and the water suction port are installed inside the water collecting cover. Two double magnetic float liquid level switches are symmetrically installed in the middle and upper part of the outer side of the water collecting cover; three photoelectric liquid level sensors are installed at a certain distance on the upper part of the outer side of the water collecting cover.

[0006] The water collecting cover is installed inside the water tank at the bottom of the well, and the bottom end of the water collecting cover is connected with the water tank at the bottom of the well; the lower end of the submersible pump is connected with the mine water in the water collecting cover, and the upper end of the submersible pump is connected to one end of the flow unit through the water suction port, and the other side of the flow unit is connected to the outside of the water collecting cover.

[0007] In summary, in the water collection device for emergency drainage in a mine described in the present invention, the mine water in the water tank at the bottom of the mine is collected by a water collection cover, and the submersible pump is driven by a motor to pump the mine water out of the mine. In order to monitor the changes in the water level in the mine, the water collection device for emergency drainage in the present invention adopts a double magnetic float liquid level switch to sense the changes in the real-time water level of the mine water below the low water level or between the low water level and the middle water level. It is particularly important to monitor the real-time water level of the mine water below the low water level to prevent the submersible pump from being sucked in, thereby avoiding damage to the submersible pump. At the same time, the water collection device for emergency drainage in a mine described in the present invention also adopts a photoelectric liquid level sensor to sense the changes in the real-time water level of the mine water between the middle water level and the high water level or above the high water level. It is particularly important to monitor the real-time water level of the mine water above the high water level to prevent the expansion of the dangerous situation. It can be seen from this that the water collection device for mine emergency drainage described in the present invention has the characteristics of good real-time performance, high precision, fast response speed, high emergency drainage efficiency, good safety, easy use and low cost. It can be widely used in the mining field and is worthy of promotion and application.

[0008] In order to achieve the above object, the second technical solution proposed by the present invention is: An optimization control system for mine emergency drainage, comprising: n of any of the above-mentioned water collection devices for mine emergency drainage, which are used to send the collected upper switch signals, lower switch signals, and fourth control signals to the control center respectively; n flow sensors for respectively monitoring the water flow of each submersible pump in the water collection device for mine emergency drainage, and sending the water flow of each submersible pump to the monitoring and early warning center and the control center; n pressure sensors for respectively monitoring the water pressure of each submersible pump in the water collection device for mine emergency drainage, and sending the water pressure of each submersible pump to the monitoring and early warning center; n temperature sensors for respectively monitoring the temperature of each motor in the water collection device for mine emergency drainage, and sending the temperature of each motor to the monitoring and early warning center; n current sensors for respectively monitoring the current of each motor in the water collection device for mine emergency drainage; and for combining the upper switch signal and the lower switch signal correspondingly sent by each of the water collection devices for mine emergency drainage, and generating a first control signal, a second control signal, a third control signal and a corresponding control signal according to the corresponding control signal. The fourth control signal received from the photoelectric liquid level sensor adopts the vacuum protection method to control the operation of each of the water collection devices for mine emergency drainage, and sends a corresponding mine water level warning signal to the monitoring and early warning center when the real-time water level in each of the water collection devices for mine emergency drainage is higher than the high water level, and sends a corresponding submersible pump fault alarm signal to the monitoring and early warning center when the real-time water level in each of the water collection devices for mine emergency drainage is lower than the low water level and the submersible pump has not stopped working; at the same time, the corresponding indicator light is lit according to the second control signal, the third control signal or the fourth control signal, and the control center that issues an alarm according to the mine water level warning signal and the submersible pump fault alarm signal; the monitoring and early warning center is used to display the water flow of each submersible pump sent by n flow sensors, the water pressure of each submersible pump sent by n pressure sensors, the temperature of each motor sent by n temperature sensors, the current of each motor sent by n current sensors, the mine water level warning signal sent by the control center, and the submersible pump fault alarm signal; wherein n is a natural number. To sum up, in the optimization control system for mine emergency drainage described in the present invention, the control center processes the upper switch signal, the lower switch signal, and the fourth control signal corresponding to each mine emergency drainage water collection device: according to the turning on and off of the upper switch signal and the lower switch signal, the first control signal, the second control signal, and the third control signal are combined; and the operation of each mine emergency drainage water collection device is controlled according to the first control signal, the second control signal, the third control signal, and the fourth control signal, and the corresponding indicator light is lit according to the second control signal, the third control signal, and the fourth control signal, so that the monitoring personnel can clearly know the real-time water level of the mine water at the first time and realize the submersible pump suction protection.At the same time, when the first control signal is effective but the flow rate of the submersible pump in the water collection device for mine emergency drainage is normal, it indicates that the submersible pump has failed and an equipment failure alarm is issued; when the real-time water level of the mine water is higher than the high water level, in addition to the indicator light corresponding to the fourth control signal being lit, a water level warning is also issued. In addition, the monitoring center also intuitively displays the real-time water level of the mine water, the working status of the submersible pump, the alarm status, etc. It can be seen that the optimization control system for mine emergency drainage described in the present invention has the characteristics of strong intuitiveness, good real-time performance, high control accuracy, fast response speed, high emergency drainage efficiency, good safety, simple structure, easy use and low cost, and is worthy of promotion and application.

[0009] In order to achieve the above object, the third technical solution proposed by the present invention is: The vacuum protection method for mine emergency drainage corresponding to any of the above-mentioned optimization control systems for mine emergency drainage specifically comprises the following steps: Step 1: When the mine water level is lower than the low water level in the water collecting cover, the lower reed switch is disconnected and the upper reed switch is also disconnected. At this time, the lower switch disconnection signal and the upper switch disconnection signal are combined into a first control signal to control the corresponding motor to stop working.

[0010] Step 2: When the mine water level is between the low water level and the middle water level in the water collecting cover, the lower reed switch is closed and the upper reed switch is opened. At this time, the lower switch closing signal and the upper switch opening signal are combined into a second control signal to control the yellow indicator light to light up.

[0011] Step 3: When the mine water level is between the middle water level and the high water level in the water collecting cover, the lower reed switch is closed and the upper reed switch is also closed. At this time, the lower switch closing signal and the upper switch closing signal are combined into a third control signal to control the corresponding motor to start. At the same time, the green indicator light is turned on.

[0012] Step 4: When the mine water level is higher than the high water level in the water collecting cover, the red indicator light is controlled to light up according to the fourth control signal generated by the photoelectric sensor, and at the same time, the mine water level warning buzzer is controlled to alarm.

[0013] In summary, in the vacuum protection method for emergency drainage of mines described in the present invention, according to the first control signal, the second control signal, the third control signal composed of the disconnection and closing of the upper magnetic reed switch and the lower magnetic reed switch, and the fourth control signal generated by the photoelectric sensor, it is confirmed that the real-time water level of the mine water is below the low water level, between the low water level and the middle water level, between the middle water level and the high water level, and above the high water level. At the same time, the first control signal controls the corresponding motor to stop running, that is, the corresponding submersible pump stops running, so as to prevent the submersible pump from being damaged by vacuum suction. When the second control signal, the third control signal or the fourth control signal is valid, the corresponding indicator light is also lit respectively. In particular, when the fourth control signal is valid, in addition to lighting the corresponding indicator light, a mine water level warning is also performed. It can be seen from this that the vacuum protection method for emergency drainage of mines described in the present invention has the characteristics of strong intuitiveness, good real-time performance, high control accuracy, high precision, fast response speed, high emergency drainage efficiency, good safety, convenient use and low cost, and is worthy of promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The figure is a schematic diagram of the overall composition structure of the water collecting device for emergency drainage in mines according to the present invention.

[0015] Figure 2 Schematic diagram of four water level conditions of the water collecting device for mine emergency drainage according to the present invention.

[0016] Figure 3 It is a schematic diagram of the detection state of the photoelectric liquid level sensor of the present invention in a water-free state.

[0017] Figure 4 It is a schematic diagram of the detection state of the photoelectric liquid level sensor of the present invention in the presence of water.

[0018] Figure 5 It is a schematic diagram of the composition structure of the conditioning circuit of the present invention.

[0019] Figure 6 The figure is a schematic diagram of the overall structure of the optimization control system for mine emergency drainage according to the present invention.

[0020] Figure 7 The figure is a schematic diagram of the overall process of the vacuum protection method for emergency drainage in mines according to the present invention. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Figure 1 The overall structure diagram of the water collection device for emergency drainage in mines according to the present invention is shown in FIG. Figure 1 As shown, the water collecting device for emergency drainage in a mine according to the present invention comprises: a water collecting cover 3 for collecting the mine water 2 in the water tank 1 at the bottom of a mine shaft; a submersible pump 4 for extracting the mine water 2 in the water collecting cover 3; a motor for driving the submersible pump 4 to operate; a flow unit 9 for controlling the water flow of the submersible pump 4 to ensure the normal operation of the submersible pump 4; two double magnetic float liquid level switches 8 for detecting whether the real-time water level of the mine water in the water collecting cover 3 is less than the low water level, between the low water level and the middle water level, or between the middle water level and the high water level, and sending the generated corresponding upper switch signal and lower switch signal to the external control system; three photoelectric liquid level sensors 10 for detecting whether the real-time water level of the mine water in the water collecting cover 3 is higher than the high water level, and sending the generated fourth control signal to the external control system; wherein, The submersible pump 4 is connected to the flow unit 9 through the water suction port 5, and the submersible pump 4, the flow unit 9, and the water suction port 5 are installed inside the water collecting cover 3, and two double magnetic float liquid level switches 8 are symmetrically installed in the middle and upper part of the outer side of the water collecting cover 3; three photoelectric liquid level sensors 10 are installed at a certain distance on the upper part of the outer side of the water collecting cover 3.

[0023] The water collecting cover 3 is installed inside the water tank 1 at the bottom of the well, and the bottom end of the water collecting cover 3 is connected to the water tank 1 at the bottom of the well; the lower end of the submersible pump 4 is connected to the mine water 2 in the water collecting cover, and the upper end of the submersible pump 4 is connected to one end of the flow unit 9 through the water suction port 5, and the other side of the flow unit 9 is connected to the outside of the water collecting cover 3.

[0024] In practical applications, the overcurrent unit 9 is a prior art and will not be described in detail here.

[0025] In summary, in the water collection device for emergency drainage in a mine described in the present invention, the mine water in the water tank at the bottom of the mine is collected by a water collection cover, and the submersible pump is driven by a motor to pump the mine water out of the mine. In order to monitor the changes in the water level in the mine, the water collection device for emergency drainage in the present invention adopts a double magnetic float liquid level switch to sense the changes in the real-time water level of the mine water below the low water level or between the low water level and the middle water level. It is particularly important to monitor the real-time water level of the mine water below the low water level to prevent the submersible pump from being sucked in, thereby avoiding damage to the submersible pump. At the same time, the water collection device for emergency drainage in a mine described in the present invention also adopts a photoelectric liquid level sensor to sense the changes in the real-time water level of the mine water between the middle water level and the high water level or above the high water level. It is particularly important to monitor the real-time water level of the mine water above the high water level to prevent the danger from expanding. It can be seen from this that the water collection device for mine emergency drainage described in the present invention has the characteristics of good real-time performance, high precision, fast response speed, high emergency drainage efficiency, good safety, simple structure, easy use and low cost. It can be widely used in the mining field and is worthy of promotion and application.

[0026] In the device of the present invention, the low water level is one-sixth of the capacity of the water tank at the bottom of the mine, the middle water level is one-half of the capacity of the water tank at the bottom of the mine, and the high water level is five-sixths of the capacity of the water tank at the bottom of the mine. Figure 2 Schematic diagram of four water level conditions of the water collection device for emergency drainage of mines according to the present invention. Figure 2 As shown, Figure A indicates that the mine water level is lower than the low water level, Figure B indicates that the mine water level is between the low water level and the middle water level, Figure C indicates that the mine water level is between the middle water level and the high water level, and Figure D indicates that the mine water level is higher than the high water level.

[0027] In the device of the present invention, each double magnetic float liquid level switch 8 includes: a magnetic float used to float up and down within a certain range as the water level of the mine water 2 in the water collecting cover 3 changes; an upper magnetic reed switch 7 used to open or close according to the floating position of the corresponding magnetic float, and send the corresponding generated upper switch signal to the external control system; a lower magnetic reed switch 6 used to open or close according to the floating position of the corresponding magnetic float, and send the corresponding generated lower switch signal to the external control system; a metal rod used to install the magnetic float and the upper magnetic reed switch 7 and the lower magnetic reed switch 6, and a ring magnet used to generate a magnetic field; wherein, The magnetic float is a hollow structure, and the annular magnets are respectively encapsulated in the magnetic float; the upper magnetic reed switch 7 is installed at the middle water level, and the lower magnetic reed switch 6 is installed at the low water level; the magnetic float can float up and down within a certain range.

[0028] In actual applications, when the magnetic float floats below the lower reed switch 6, the upper reed switch 7 and the lower reed switch 6 are both disconnected; when the magnetic float is at the position of the lower reed switch 6, the annular magnet in the magnetic float acts through the magnetic field to close the lower reed switch 6. At this time, since the magnetic float is still below the upper reed switch 7, the upper reed switch 7 is disconnected; when the magnetic float is at the position of the upper reed switch 7, the annular magnet in the magnetic float acts through the magnetic field to close the upper reed switch 7. At this time, since the magnetic float is above the lower reed switch 6, the lower reed switch 6 is also in a closed state.

[0029] The low water level is where the water inlet 5 of the submersible pump 4 is located. In other words, the water inlet 5 of the submersible pump 4 is basically located at one sixth of the water tank capacity at the bottom of the mine.

[0030] Figure 3 It is a schematic diagram of the detection state of the photoelectric liquid level sensor of the present invention in a water-free state. Figure 4 Schematic diagram of the detection state of the photoelectric liquid level sensor of the present invention in the presence of water. Figure 3 , Figure 4As shown, each of the photoelectric liquid level sensors 10 includes: an infrared photodiode 12 for sending the generated infrared light to a lens 13; two lenses 13 for receiving the infrared light generated by the infrared photodiode and generating refracted light; a phototransistor 11 for converting the refracted light sent by the lens 13 into an electrical signal and sending the electrical signal to a conditioning circuit; a conditioning circuit for filtering and shaping the electrical signal from the phototransistor 11 to generate a fourth control signal and sending the fourth control signal to an external control system; a packaging structure 14 for packaging the infrared photodiode 12, the lens 13, the phototransistor 11, and the conditioning circuit; wherein, One side of the two lenses is arranged at a certain angle; on the inner side of the two lenses 13 and close to the packaging structure 14 side of the lens 13, a phototransistor 11 and an infrared photodiode 12 are installed at intervals.

[0031] In actual application, when the mine water level is lower than the photoelectric liquid level sensor, the photoelectric liquid level sensor cannot detect water, that is, in the water-free state, the light emitted by the infrared photodiode 12 will be completely refracted into the phototransistor 11 by the lens 13, and the phototransistor 11 converts the light signal into an electrical signal. At this time, since the light signal entering the phototransistor 11 is relatively strong, the converted electrical signal is also relatively strong. When the mine water level rises to the position of the lens 13 in the photoelectric liquid level sensor, the photoelectric liquid level sensor can detect water, that is, in the water state, part of the light emitted by the infrared photodiode 12 is refracted into the mine water, and the other part will be completely refracted into the phototransistor 11 by the lens 13, and the phototransistor 11 converts the light signal into an electrical signal. At this time, since the light signal entering the phototransistor 11 is relatively weak, the converted electrical signal is also relatively weak.

[0032] In practical applications, each photoelectric liquid level sensor 10 further includes: a potentiometer for adjusting the detection distance of the photoelectric liquid level sensor 10 by adjusting its own resistance. This part is the prior art and will not be described in detail here.

[0033] In actual application, three photoelectric liquid level sensors 10 are distributed at intervals along the circumference of the upper end of the water collecting cover 3 at the high water level of the water collecting cover 3 .

[0034] Figure 5 FIG. 1 is a schematic diagram of the structure of the conditioning circuit of the present invention. Figure 5The conditioning circuit of the present invention comprises: a first resistor to a sixth resistor R1 to R6, a first capacitor C1, a second capacitor C2, a first operational amplifier W1, a second operational amplifier W2 and a power supply VCC; wherein the first capacitor C1, the first resistor R1, the second resistor R2 and the second capacitor C2 constitute a low-pass filter, the first operational amplifier W1, the third resistor R3 and the fourth resistor R4 constitute an amplifier, and the second operational amplifier W2, the fifth resistor R5 and the sixth resistor R6 constitute a hysteresis comparator; One end of the first capacitor C1 is connected to the electrical signal output end of the phototransistor 11, the other end of the first capacitor C1 is connected to one end of the first resistor R1 and one end of the second resistor R2, the other end of the first resistor R1 is grounded, the other end of the second resistor R2 is connected to one end of the second capacitor C2 and the second pin of the first operational amplifier W1, and the other end of the second capacitor C2 is grounded; The third pin of the first operational amplifier W1 is connected to one end of the third resistor R3 and one end of the fourth resistor R4, the other end of the third resistor R3 is grounded, the fifth pin of the first operational amplifier W1 is connected to the power supply VCC, the fourth pin of the first operational amplifier W1 is grounded, and the first pin of the first operational amplifier W1 is connected to the other end of the fourth resistor R4 and the third pin of the second operational amplifier W2.

[0035] Pin 2 of the second operational amplifier W2 is connected to one end of the fifth resistor R5 and one end of the sixth resistor R6, the other end of the fifth resistor R5 is connected to the power supply VCC, and the other end of the sixth resistor R6 is grounded; pin 5 of the second operational amplifier W2 is connected to the power supply VCC, pin 4 of the second operational amplifier W2 is grounded, and pin 1 of the second operational amplifier W2 is connected to an external controller.

[0036] In practical applications, the signal output by the first pin of the second operational amplifier W2 is the fourth control signal. When the fourth control signal is less than a certain value, a water level warning will be triggered through the external control system. The water level warning trigger value of the fourth control signal can be set through the control system according to actual needs.

[0037] In the present invention, the voltage output by the power supply VCC can be determined according to actual conditions. Here, the power supply VCC is a prior art and will not be described in detail here.

[0038] In actual applications, the resistance of the first resistor R1 is 20KΩ, the resistance of the second resistor R2 is 10KΩ, the resistance of the third resistor is 220Ω, the resistance of the fourth resistor R4 is 120KΩ, the resistance of the fifth resistor R5 is 10KΩ, the resistance of the sixth resistor R6 is 10KΩ, the capacitance of the first capacitor C1 is 10uF, and the capacitance of the second capacitor C2 is 105uF.

[0039] Figure 6 The figure is a schematic diagram of the overall structure of the optimization control system for emergency drainage in mines according to the present invention. Figure 6 As shown, the optimization control system for mine emergency drainage described in the present invention includes: n of the above-mentioned water collection devices J1~JN for mine emergency drainage for sending the collected upper switch signals, lower switch signals and fourth control signals to the control center respectively; n of the flow sensors for respectively monitoring the water flow of each submersible pump in the water collection devices J1~JN for mine emergency drainage and sending the water flow of each submersible pump to the monitoring and early warning center and the control center; n of the flow sensors for respectively monitoring the water flow of each submersible pump in the water collection devices J1~JN for mine emergency drainage and sending the water flow of each submersible pump to the monitoring and early warning center and the control center. The first control signal and the second control signal are respectively generated by the upper switch signal and the lower switch signal of each mine emergency drainage water collection device J1~JN, and the ... The control signal, the third control signal and the fourth control signal received from the photoelectric liquid level sensor 10 are used to control the operation of each of the water collection devices J1~JN for mine emergency drainage by adopting the vacuum protection method, and when the real-time water level in each of the water collection devices J1~JN for mine emergency drainage is higher than the high water level, the corresponding mine water level warning signal is sent to the monitoring and early warning center, and when the real-time water level in each of the water collection devices J1~JN for mine emergency drainage is lower than the low water level and the submersible pump does not stop working, the corresponding submersible pump fault alarm signal is sent to the monitoring and early warning center; at the same time, the corresponding indicator light is lit according to the second control signal, the third control signal or the fourth control signal, and the control center that issues an alarm according to the mine water level warning signal and the submersible pump fault alarm signal; the monitoring and early warning center is used to display the water flow of each submersible pump sent by n flow sensors, the water pressure of each submersible pump sent by n pressure sensors, the temperature of each motor sent by n temperature sensors, the current of each motor sent by n current sensors, the mine water level warning signal sent by the control center, and the submersible pump fault alarm signal; wherein n is a natural number.

[0040] In actual applications, the control center also pre-sets the water level warning trigger value and the minimum flow rate of the submersible pump. The water level warning trigger value and the minimum flow rate of the submersible pump can be set according to the actual situation. The real-time water level in each of the mine emergency drainage water collection devices J1~JN is lower than the low water level and the submersible pump does not stop working, specifically: the real-time water level in each of the mine emergency drainage water collection devices J1~JN is lower than the low water level, but the submersible pump flow is still higher than the minimum flow rate of the submersible pump.

[0041] In summary, in the optimization control system for mine emergency drainage described in the present invention, the control center processes the upper switch signal, lower switch signal, and fourth control signal corresponding to each mine emergency drainage water collection device: according to the upper switch signal and the lower switch signal, the first control signal, the second control signal, and the third control signal are combined to obtain the operation of each mine emergency drainage water collection device according to the first control signal, the second control signal, the third control signal, and the fourth control signal, and the corresponding indicator light is lit according to the second control signal, the third control signal, and the fourth control signal, so that the monitoring personnel can clearly know the real-time water level of the mine water at the first time, and realize the suction protection of the submersible pump. At the same time, when the first control signal is effective but the flow of the submersible pump in the mine emergency drainage water collection device is normal, it indicates that the submersible pump has a fault and an equipment fault alarm is issued; when the real-time water level of the mine water is higher than the high water level, in addition to the indicator light corresponding to the fourth control signal, a water level warning is also issued. In addition, the monitoring center also intuitively displays the real-time water level of the mine water, the working status of the submersible pump, the alarm status, etc. It can be seen from this that the optimization control system for mine emergency drainage described in the present invention has the characteristics of strong intuitiveness, good real-time performance, high control accuracy, fast response speed, high emergency drainage efficiency, good safety, simple structure, easy use and low cost, and is worthy of promotion and application.

[0042] In the system of the present invention, the control center includes: a controller, n mine water level warning buzzers, n submersible pump fault buzzers, n red indicator lights, n green indicator lights, and n yellow indicator lights; wherein, one mine water level warning buzzer, one submersible pump fault buzzer, one red indicator light, one yellow indicator light, and one green indicator light each correspond to a set of mine emergency drainage water collection devices; The controller is used to combine the upper switch signal and the lower switch signal correspondingly sent by each of the mine emergency drainage water collection devices J1~JN: when the lower switch signal and the upper switch signal are both disconnected signals, the two signals are combined into a first control signal; when the lower switch signal is a closed signal and the upper switch signal is an open signal, the two signals are combined into a second control signal, and the second control signal is sent to the corresponding yellow indicator light; when the lower switch signal and the upper switch signal are both closed signals, the two signals are combined into a third control signal, and the third control signal is sent to the corresponding green indicator light; at the same time, when the first control signal is valid and the corresponding submersible pump water flow is normal, a submersible pump fault signal is sent to the corresponding submersible pump fault buzzer; it is also used to forward the fourth control signal received from the photoelectric liquid level sensor 10 to the corresponding red indicator light and the corresponding mine water level warning buzzer.

[0043] The yellow indicator light is used to light up according to the second control signal sent by the controller.

[0044] The green indicator light is used to light up according to the third control signal sent by the controller.

[0045] The red indicator light is used to light up according to the fourth control signal sent by the controller.

[0046] The submersible pump fault buzzer is used to alarm according to the submersible pump fault signal sent by the controller.

[0047] The mine water level early warning buzzer is used to give an alarm according to the fourth control signal sent by the controller.

[0048] In actual applications, the controller is also used to send the first control signal or the third control signal to the corresponding motor in the mine emergency drainage water collection device, and send the first control signal, the second control signal, the third control signal, and the fourth control signal to the monitoring and early warning center.

[0049] The motor is also used to stop running according to a first control signal sent by the controller; start running according to a third control signal sent by the controller; and at the same time, send its own stop running signal or start running signal to the monitoring and early warning center.

[0050] The monitoring and early warning center is also used to display the start and stop of the motor according to the stop operation signal and start operation signal sent by the motor in the corresponding mine emergency drainage water collection device J1~JN; according to the first control signal, the second control signal, the third control signal, and the fourth control signal sent by the controller, the mine water level is displayed to be lower than the low water level, between the low water level and the middle water level, between the middle water level and the high water level, and higher than the high water level, respectively.

[0051] In actual applications, after the controller controls the corresponding motor to start through the third control signal, the controller's control over the motor's operation process is prior art and will not be described in detail here.

[0052] In the system of the present invention, the controller can be a programmable logic controller (PLC, Programmable Logic Controller), a single-chip microcomputer and other types of controllers.

[0053] In actual applications, the controller also pre-sets a water level warning trigger value and a submersible pump flow minimum value. The water level warning trigger value and the submersible pump flow minimum value can be set according to actual conditions. When the first control signal is valid and the corresponding submersible pump water flow is normal, specifically: when the first control signal is valid, but the submersible pump flow is still higher than the submersible pump flow minimum value.

[0054] In the system of the present invention, the low water level is one-sixth of the capacity of the water tank at the bottom of the mine, the middle water level is one-half of the capacity of the water tank at the bottom of the mine, and the high water level is five-sixths of the capacity of the water tank at the bottom of the mine.

[0055] Figure 7 The figure is a schematic diagram of the overall process of the vacuum protection method for emergency drainage in mines according to the present invention. Figure 7 As shown, the present invention corresponds to the mine emergency drainage optimization control system of any of the above-mentioned mine emergency drainage optimization control systems, and specifically includes the following steps: Step 1: When the water level of the mine water 2 is lower than the low water level in the water collecting cover 3, the lower reed switch 6 is disconnected and the upper reed switch 7 is also disconnected. At this time, the lower switch disconnection signal and the upper switch disconnection signal are combined into a first control signal to control the corresponding motor to stop working.

[0056] Step 2: When the water level of the mine water 2 is between the low water level and the middle water level in the water collecting cover 3, the lower reed switch 6 is closed and the upper reed switch 7 is opened. At this time, the lower switch closing signal and the upper switch opening signal are combined into a second control signal to control the yellow indicator light to light up.

[0057] Step 3, when the water level of the mine water 2 is between the middle water level and the high water level in the water collecting cover 3, the lower reed switch 6 is closed and the upper reed switch 7 is also closed. At this time, the lower switch closing signal and the upper switch closing signal are combined into a third control signal to control the corresponding motor to start, and at the same time, control the green indicator light to light up.

[0058] Step 4: When the water level of the mine water 2 is higher than the high water level in the water collecting cover 3, the red indicator light is controlled to light up according to the fourth control signal generated by the photoelectric sensor 10, and at the same time, the mine water level warning buzzer is controlled to alarm.

[0059] In summary, in the vacuum protection method for emergency drainage of mines described in the present invention, according to the first control signal, the second control signal, the third control signal composed of the disconnection and closing of the upper magnetic reed switch and the lower magnetic reed switch, and the fourth control signal generated by the photoelectric sensor, it is confirmed that the real-time water level of the mine water is below the low water level, between the low water level and the middle water level, between the middle water level and the high water level, and above the high water level. At the same time, the first control signal controls the corresponding motor to stop running, that is, the corresponding submersible pump stops running, so as to prevent the submersible pump from being damaged by vacuum suction. When the second control signal, the third control signal or the fourth control signal is valid, the corresponding indicator light is also lit respectively. In particular, when the fourth control signal is valid, in addition to lighting the corresponding indicator light, a mine water level warning is also performed. It can be seen from this that the vacuum protection method for emergency drainage of mines described in the present invention has the characteristics of strong intuitiveness, good real-time performance, high control accuracy, fast response speed, high emergency drainage efficiency, good safety, convenient use and low cost, and is worthy of promotion and application.

[0060] In practical applications, in the vacuum protection method, the following steps are further included between step 1 and step 2: Step a: Determine based on the first control signal and the water flow of the submersible pump sent by the corresponding flow sensor: when the first control signal is valid and the corresponding submersible pump flow is higher than the minimum value of the submersible pump flow, it indicates that the corresponding submersible pump is faulty, and a submersible pump fault alarm is issued; when the first control signal is valid and the corresponding submersible pump flow is lower than the minimum value of the submersible pump flow, it indicates that the corresponding submersible pump is normal.

[0061] In the vacuum protection method for mine emergency drainage described in the present invention, the low water level is one-sixth of the capacity of the mine bottom water tank, the middle water level is one-half of the capacity of the mine bottom water tank, and the high water level is five-sixths of the capacity of the mine bottom water tank.

[0062] In summary, since the submersible pumps for mine emergency drainage are basically large submersible pumps, it is very important to protect the submersible pumps from air suction. It can be seen that the technical solutions described in the mine emergency drainage water collection device, the mine emergency drainage optimization control system, and the mine emergency drainage air suction protection method of the present invention are of great significance.

[0063] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A water collection device for mine emergency drainage, characterized in that: The water collection device includes: a water collection cover for collecting mine water in the water tank at the bottom of the mine; a submersible pump for pumping out the mine water in the water collection cover; a motor for driving the submersible pump; a flow unit for controlling the water flow of the submersible pump to ensure the normal operation of the submersible pump; two double magnetic float liquid level switches for detecting whether the real-time water level of the mine water in the water collection cover is less than the low water level, between the low water level and the middle water level, or between the middle water level and the high water level, and sending the generated upper switch signal and lower switch signal to the external control system; three photoelectric liquid level sensors for detecting whether the real-time water level of the mine water in the water collection cover is higher than the high water level, and sending the generated fourth control signal to the external control system; wherein, The submersible pump is connected to the flow unit through a water inlet, and the submersible pump, flow unit and water inlet are installed inside the water collecting cover. Two double magnetic float liquid level switches are symmetrically installed on the upper middle part of the outer side of the water collecting cover; three photoelectric liquid level sensors are installed on the upper outer side of the water collecting cover at a certain distance. The water collecting cover is installed inside the water tank at the bottom of the well, and the bottom end of the water collecting cover is connected with the water tank at the bottom of the well; the lower end of the submersible pump is connected with the mine water in the water collecting cover, and the upper end of the submersible pump is connected to one end of the flow unit through the water suction port, and the other side of the flow unit is connected to the outside of the water collecting cover.

2. The water collection device for emergency drainage in mines according to claim 1, characterized in that: The low water level is one-sixth of the capacity of the water tank at the bottom of the mine, the middle water level is one-half of the capacity of the water tank at the bottom of the mine, and the high water level is five-sixths of the capacity of the water tank at the bottom of the mine.

3. The water collection device for mine emergency drainage according to claim 2, characterized in that: Each of the dual magnetic float liquid level switches includes: a magnetic float used to float up and down within a certain range as the mine water level in the water collecting cover changes; an upper reed switch used to open or close according to the floating position of the corresponding magnetic float, and send the corresponding upper switch signal generated to the external control system; a lower reed switch used to open or close according to the floating position of the corresponding magnetic float, and send the corresponding lower switch signal generated to the external control system; a metal rod used to install the magnetic float and the upper reed switch and the lower reed switch, and a ring magnet used to generate a magnetic field; wherein the magnetic float is a hollow structure, and the ring magnets are respectively encapsulated in the magnetic float; the upper reed switch is installed at the middle water level, and the lower reed switch is installed at the low water level; the magnetic float can float up and down within a certain range; the low water level is the location of the water intake of the submersible pump.

4. The water collection device for emergency drainage in mines according to claim 2 or 3, characterized in that: Each of the photoelectric liquid level sensors comprises: an infrared photodiode for sending the generated infrared light to a lens; two lenses for receiving the infrared light generated by the infrared photodiode and generating refracted light; a phototransistor for converting the refracted light sent by the lens into an electrical signal and sending the electrical signal to a conditioning circuit; a conditioning circuit for filtering and shaping the electrical signal from the phototransistor to generate a fourth control signal and sending the fourth control signal to an external control system; a packaging structure for packaging the infrared photodiode, the lens, the phototransistor and the conditioning circuit; wherein one side of the two lenses is arranged at a certain angle; and phototransistors and infrared photodiodes are installed at intervals on the inner side of the two lenses and close to the packaging structure side of the lenses.

5. The water collection device for emergency drainage in mines according to claim 4, characterized in that: The three photoelectric liquid level sensors are distributed at intervals along the circumference of the upper end of the water collecting cover at the high water level of the water collecting cover.

6. The water collection device for emergency drainage in mines according to claim 4, characterized in that: The conditioning circuit comprises: a first resistor to a sixth resistor, a first capacitor, a second capacitor, a first operational amplifier, a second operational amplifier and a power supply; wherein the first capacitor, the first resistor, the second resistor and the second capacitor constitute a low-pass filter, the first operational amplifier, the third resistor and the fourth resistor constitute an amplifier, and the second operational amplifier, the fifth resistor and the sixth resistor constitute a hysteresis comparator; One end of the first capacitor is connected to the electrical signal output end of the phototransistor, the other end of the first capacitor is connected to one end of the first resistor and one end of the second resistor, the other end of the first resistor is grounded, the other end of the second resistor is connected to one end of the second capacitor and the second pin of the first operational amplifier, and the other end of the second capacitor is grounded; The third pin of the first operational amplifier is connected to one end of the third resistor and one end of the fourth resistor, the other end of the third resistor is grounded, the fifth pin of the first operational amplifier is connected to the power supply, the fourth pin of the first operational amplifier is grounded, and the first pin of the first operational amplifier is connected to the other end of the fourth resistor and the third pin of the second operational amplifier; Pin 2 of the second operational amplifier is connected to one end of the fifth resistor and one end of the sixth resistor, the other end of the fifth resistor is connected to the power supply, and the other end of the sixth resistor is grounded; pin 5 of the second operational amplifier is connected to the power supply, pin 4 of the second operational amplifier is grounded, and pin 1 of the second operational amplifier is connected to the external controller.

7. The water collection device for emergency drainage in mines according to claim 6, characterized in that: The resistance value of the first resistor is 20KΩ, the resistance value of the second resistor is 10KΩ, the resistance value of the third resistor is 220Ω, the resistance value of the fourth resistor is 120KΩ, the resistance value of the fifth resistor is 10KΩ, the resistance value of the sixth resistor is 10KΩ, the capacitance value of the first capacitor is 10uF, and the capacitance value of the second capacitor is 105uF.

8. An optimization control system for mine emergency drainage, characterized in that: The optimization control system includes: n water collection devices for emergency mine drainage as described in any one of claims 1 to 7, which are used to send the collected upper switch signals, lower switch signals, and fourth control signals to the control center respectively; n flow sensors for respectively monitoring the water flow of each submersible pump in the water collection device for emergency mine drainage, and sending the water flow of each submersible pump to the monitoring and early warning center and the control center; n pressure sensors for respectively monitoring the water pressure of each submersible pump in the water collection device for emergency mine drainage, and sending the water pressure of each submersible pump to the monitoring and early warning center; n temperature sensors for respectively monitoring the temperature of each motor in the water collection device for emergency mine drainage, and sending the temperature of each motor to the monitoring and early warning center; n current sensors for respectively monitoring the current of each motor in the water collection device for emergency mine drainage; and for combining the upper switch signals and lower switch signals correspondingly sent by each of the water collection devices for emergency mine drainage, and generating the first control signal, the second control signal, the third control signal and the corresponding control signal according to the corresponding control signal. The fourth control signal received from the photoelectric liquid level sensor adopts the vacuum protection method to control the operation of each of the water collection devices for mine emergency drainage, and sends a corresponding mine water level warning signal to the monitoring and early warning center when the real-time water level in each of the water collection devices for mine emergency drainage is higher than the high water level, and sends a corresponding submersible pump fault alarm signal to the monitoring and early warning center when the real-time water level in each of the water collection devices for mine emergency drainage is lower than the low water level and the submersible pump has not stopped working; at the same time, the corresponding indicator light is lit according to the second control signal, the third control signal or the fourth control signal, and the control center that issues an alarm according to the mine water level warning signal and the submersible pump fault alarm signal; the monitoring and early warning center is used to display the water flow of each submersible pump sent by n flow sensors, the water pressure of each submersible pump sent by n pressure sensors, the temperature of each motor sent by n temperature sensors, the current of each motor sent by n current sensors, the mine water level warning signal sent by the control center, and the submersible pump fault alarm signal; wherein n is a natural number.

9. The optimization control system for emergency drainage in mines according to claim 8, characterized in that: The control center includes: a controller, n mine water level warning buzzers, n submersible pump fault buzzers, n red indicator lights, n green indicator lights, and n yellow indicator lights; wherein, one mine water level warning buzzer, one submersible pump fault buzzer, one red indicator light, one yellow indicator light, and one green indicator light each correspond to a set of mine emergency drainage water collection devices; A controller, used for correspondingly combining the upper switch signal and the lower switch signal sent by each of the water collection devices for emergency drainage of mines: when the lower switch signal and the upper switch signal are both disconnected signals, the two signals are combined into a first control signal; when the lower switch signal is a closed signal and the upper switch signal is an open signal, the two signals are combined into a second control signal, and the second control signal is sent to the corresponding yellow indicator light; when the lower switch signal and the upper switch signal are both closed signals, the two signals are combined into a third control signal, and the third control signal is sent to the corresponding green indicator light; at the same time, when the first control signal is valid and the corresponding water flow of the submersible pump is normal, a submersible pump fault signal is sent to the corresponding submersible pump fault buzzer; and is also used for forwarding the fourth control signal received from the photoelectric liquid level sensor to the corresponding red indicator light and the corresponding mine water level warning buzzer; A yellow indicator light, used to light up according to a second control signal sent by the controller; A green indicator light, used to light up according to a third control signal sent by the controller; A red indicator light, used to light up according to a fourth control signal sent by the controller; Submersible pump fault buzzer, used to give an alarm according to the submersible pump fault signal sent by the controller; The mine water level early warning buzzer is used to give an alarm according to the fourth control signal sent by the controller.

10. The optimization control system for mine emergency drainage according to claim 9, characterized in that: The controller is further used to send the first control signal or the third control signal to the corresponding motor in the mine emergency drainage water collection device, and send the first control signal, the second control signal, the third control signal, and the fourth control signal to the monitoring and early warning center; The motor is also used to stop running according to a first control signal sent by the controller; start running according to a third control signal sent by the controller; and at the same time, send its own stop running signal or start running signal to the monitoring and early warning center; The monitoring and early warning center is also used to display the start and stop of the motor according to the stop operation signal and the start operation signal sent by the motor in the corresponding mine emergency drainage water collection device; and to display the mine water level as being lower than the low water level, between the low water level and the middle water level, between the middle water level and the high water level, and higher than the high water level according to the first control signal, the second control signal, the third control signal, and the fourth control signal sent by the controller.

11. The water collection device for emergency drainage in mines according to claim 8 or 10, characterized in that: The low water level is one-sixth of the capacity of the water tank at the bottom of the mine, the middle water level is one-half of the capacity of the water tank at the bottom of the mine, and the high water level is five-sixths of the capacity of the water tank at the bottom of the mine.

12. A mine emergency drainage cavitation protection method corresponding to any one of the mine emergency drainage optimization control systems according to claims 6 to 11, characterized in that: The vacuum protection method specifically comprises the following steps: Step 1: When the mine water level is lower than the low water level in the water collecting cover, the lower reed switch is disconnected and the upper reed switch is also disconnected. At this time, the lower switch disconnection signal and the upper switch disconnection signal are combined into a first control signal to control the corresponding motor to stop working; Step 2: When the mine water level is between the low water level and the middle water level in the water collecting cover, the lower reed switch is closed and the upper reed switch is opened. At this time, the lower switch closing signal and the upper switch opening signal are combined into a second control signal to control the yellow indicator light to light up; Step 3: When the mine water level is between the middle water level and the high water level in the water collecting cover, the lower magnetic reed switch is closed and the upper magnetic reed switch is also closed. At this time, the lower switch closing signal and the upper switch closing signal are combined into a third control signal to control the corresponding motor to start, and at the same time, the green indicator light is controlled to light up; Step 4: When the mine water level is higher than the high water level in the water collecting cover, the red indicator light is controlled to light up according to the fourth control signal generated by the photoelectric sensor, and at the same time, the mine water level warning buzzer is controlled to alarm.

13. The vacuum protection method for mine emergency drainage according to claim 12, characterized in that: The vacuum protection method further includes the following steps between step 1 and step 2: Step a: Determine based on the first control signal and the water flow of the submersible pump sent by the corresponding flow sensor: when the first control signal is valid and the corresponding submersible pump flow is higher than the minimum value of the submersible pump flow, it indicates that the corresponding submersible pump is faulty, and a submersible pump fault alarm is issued; when the first control signal is valid and the corresponding submersible pump flow is lower than the minimum value of the submersible pump flow, it indicates that the corresponding submersible pump is normal.

14. The vacuum protection method for mine emergency drainage according to claim 12 or 13, characterized in that: The low water level is one-sixth of the capacity of the water tank at the bottom of the mine, the middle water level is one-half of the capacity of the water tank at the bottom of the mine, and the high water level is five-sixths of the capacity of the water tank at the bottom of the mine.

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