Mine flood disaster early warning device

Abstract

A mine flood disaster early warning device disclosed by the present invention comprises a suspended ceiling plate, the top and the bottom of a water sump are respectively and fixedly provided with the corresponding suspended ceiling plate and a bottom supporting frame, a water pumping module is fixedly installed between the suspended ceiling plate and the bottom supporting frame, and a low-interference water level detection module is fixedly installed on the suspended ceiling plate. A plurality of sludge detection modules with different heights are fixedly mounted on the undercarriage; the water pumping module is communicated with a water pumping main pipe, and the water pumping main pipe is respectively communicated with the low-power water pumping module and the high-power water pumping module through pipelines. The protection detection pipe is provided with a filter screen and double sensors, and the problems of winding and interference in traditional water level monitoring are solved; the three-stage sludge pipe realizes automatic full-period monitoring and prevents volume shrinkage; the water pumping reliability is improved through the outer shield, the layer selection water pumping and the double-power module; the integrated layout reduces errors, saves space, and reduces operation and maintenance intensity and risks.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mine water disaster early warning, in particular to a mine water disaster early warning device. BACKGROUND

[0002] Mine water disaster is one of the major disasters threatening the safety production of coal mines and metal mines. Lightly, it leads to the soaking damage of underground equipment and the interruption of production. Heavily, it causes well flooding accidents, resulting in casualties and huge economic losses. In the mine drainage system, the water sump is the core buffer and water storage facility. Its main function is to temporarily store normal water inflow (such as roadway dripping water and goaf seepage) and sudden water inflow (such as fault water outburst and surface water infiltration) underground, to gain pumping time for the drainage system and to avoid rapid water level rise to the underground working face, which is the "first line of defense" for mine water disaster prevention and control.

[0003] However, the safe operation of the water sump highly depends on the accurate monitoring of "water level height" and "mud deposition amount" and efficient water pumping regulation. The existing technical solutions have significant defects in actual application, which directly aggravates the risk of mine water disaster. The specific problems are as follows:

[0004] Traditional mine water level detection mostly uses floating ball sensors, bare ultrasonic sensors or electrode sensors. The floating ball is easy to be entangled and stuck by floating objects in water (such as coal cinder and plastic debris), resulting in water level signal lag or false reporting. The ultrasonic sensor is greatly affected by water turbidity (mud particles reflect sound waves, interfering with distance measurement accuracy), and is easy to be damaged by water flow without protective structure. The electrode sensor is easy to be covered by mud, resulting in the missed judgment of "water level has exceeded the warning but detection has not triggered". The above problems make it impossible for the management personnel to master the real water level of the water sump in real time, and it is difficult to start emergency measures in time when sudden water inflow occurs, missing the best disposal opportunity.

[0005] During the long-term use of the water sump, impurities such as coal slime and rock powder in the water inflow will gradually deposit to form mud. If not dredged in time, it will continuously occupy the effective water storage volume of the water sump. Existing mud detection mostly relies on manual inspection (such as measurement by underground personnel), which is not only low in efficiency and high in labor intensity, but also has safety risks such as hypoxia and collapse. Some automatic detection schemes use single height probe or bottom opening detection tube. The former can only judge "whether it reaches a certain height", and cannot cover the whole period of mud deposition. The latter is easy to be blocked by large debris, resulting in detection failure. When the mud is excessively accumulated (such as occupying more than 50% of the volume), the water storage capacity of the water sump is suddenly reduced, and it is easy to quickly fill the water sump when sudden water inflow occurs, causing water level out of control.

[0006] Traditional sump pumping adopts the mode of "single height water inlet + fixed power water pump": the water inlet is fixed in the lower part of the sump, if the sludge deposits to the height of the water inlet, it is easy to cause the sludge to be sucked into the pipeline, wear the water pump impeller and block the pipeline; if the water level drops below the water inlet, the "empty pumping" phenomenon will occur, and the water pump motor will be burned out; the fixed power water pump is seriously energy-wasting when pumping small water quantity in daily life, and the pumping capacity is insufficient when sudden large water gushing occurs, which cannot quickly control the water level and further aggravate the flood risk.

[0007] Therefore, it is very necessary to invent a mine flood early warning device. SUMMARY

[0008] The mine flood early warning device provided by the application provides the following technical scheme: a suspended ceiling plate, a bottom support frame, a water pumping module, a low-interference water level detection module, a sludge detection module, a water pumping main pipe, a low-power water pumping module and a high-power water pumping module are arranged, the top and bottom of the sump are respectively fixedly provided with corresponding suspended ceiling plates and bottom support frames, the water pumping module is fixedly arranged between the suspended ceiling plates and the bottom support frames, the low-interference water level detection module is fixedly arranged on the suspended ceiling plate, and a plurality of sludge detection modules with different heights are fixedly arranged on the bottom support frame; the water pumping module is in communication with the water pumping main pipe, and the water pumping main pipe is in communication with the low-power water pumping module and the high-power water pumping module through pipelines.

[0009] Preferably, the water pumping module comprises a water pumping vertical pipe, an outer shield, a filter hole, a water pumping pipe opening and a water pumping main pipe, the upper and lower ends of the water pumping vertical pipe are fixedly connected with the suspended ceiling plate and the bottom support frame respectively, the outer shield fixedly arranged outside the water pumping vertical pipe is uniformly provided with the filter hole penetrating through, and a plurality of water pumping pipe openings are arranged on the water pumping vertical pipe, wherein the water pumping main pipe arranged on the water pumping vertical pipe is in communication with the water pumping main pipe.

[0010] Preferably, the outer shield fixedly arranged outside the water pumping vertical pipe is a rectangular filter screen cover structure, the water pumping pipe openings vertically and equidistantly arranged on the water pumping vertical pipe are located inside the outer shield, and a water level sensor and an electromagnetic valve are arranged on each water pumping pipe opening.

[0011] Preferably, the water pumping main pipe arranged on the water pumping vertical pipe is located below the outside of the outer shield, and the water pumping vertical pipe is located on the side near the low-interference water level detection module and the sludge detection module.

[0012] Preferably, the low-interference water level detection module comprises a protective detection pipe, an ultrasonic water level sensor, a warning water level sensor, a standard water level sensor, a water inlet window and a window filter screen plate, the upper end of the protective detection pipe is fixedly installed on the ceiling plate, the ultrasonic water level sensor is fixedly installed at the top inside the protective detection pipe, the warning water level sensor and the standard water level sensor are fixedly installed on the inner wall respectively, the water inlet window is formed through the protective detection pipe, and the window filter screen plate is fixedly installed on each water inlet window.

[0013] Preferably, the lower end of the protective detection pipe is fixedly connected with the water sump bottom pouring pile through the anchor bolt, the water inlet windows formed through the protective detection pipe are equidistantly arranged along the vertical axis, the warning water level sensor and the standard water level sensor fixedly installed on the inner wall of the protective detection pipe are located between the water inlet windows, the standard water level sensor is installed at the middle position inside the protective detection pipe, and the warning water level sensor is installed at the upper position inside the protective detection pipe.

[0014] Preferably, the water pumping module, the low-interference water level detection module and the sludge detection module are vertically installed, and a plurality of sludge detection modules are arranged around the low-interference water level detection module.

[0015] Preferably, the sludge detection module comprises a sludge pipe, an exhaust hole, a sludge inlet and a sludge probe, the exhaust hole is formed through the top of the sludge pipe, the sludge inlet is formed through the sludge pipe, the sludge probe is installed at the bottom of the sludge pipe, and the bottom of the sludge pipe is fixedly connected with the bottom support frame.

[0016] Preferably, the heights of the sludge pipes of the sludge detection modules are different, and the sludge pipes are divided into three detection nodes of low height, medium height and high height according to the height.

[0017] Compared with the prior art, the application has the following beneficial effects:

[0018] 1. The protective detection pipe provides physical protection for the water level sensor, avoids water flow impact and collision with sundries, the window filter screen filters coal cinder and dregs out of water, and prevents the sensor from being blocked, the ultrasonic water level sensor (top) realizes full-range water level ranging, the warning water level sensor (upper part) and the standard water level sensor (middle part) form double threshold monitoring, and accurately trigger "daily reminder" and "emergency warning". The structure completely solves the problems of "entanglement, interference and blockage" of the traditional sensor.

[0019] 2、The low, medium and high three height silt pipes of the application correspond to the "initial stage - medium stage - critical stage" of silt deposition, realize ladder detection, and management personnel can accurately judge the silt deposition range through the "height of the trigger sensor"; the top exhaust hole avoids air in the pipe from hindering silt from entering, and the side inlet reduces the probability of blockage by sundries, ensuring stable detection signals. The module replaces manual inspection, realizes automatic and full-cycle monitoring of silt, avoids "implicit shrinkage" of the effective volume of the sump due to silt accumulation, and ensures the buffering and water storage capacity of the sump

[0020] 3、The outer protective cover filter screen filters sundries in water, preventing the water suction pipe and the electromagnetic valve from being blocked; the vertically equidistant water suction pipes (with water level sensors and electromagnetic valves) can "selective layer water suction" according to the water level and silt height (such as when the silt reaches 0.6 m, the 1.0 m high pipe opening is opened to avoid the silt layer), avoiding empty pumping and blockage; the low-power module is suitable for daily small water volume pumping (energy consumption is reduced by 60%-70%), and the high-power pumping module is suitable for sudden water surge, and the two are switched as needed, taking into account energy saving and emergency. This design greatly improves the reliability of the water pumping system, ensures rapid and controllable water level in the sump, and reduces the risk of full sump.

[0021] 4、The water pumping module, low-interference water level detection module and silt detection module are integrated between the ceiling plate and the bottom support frame, and the silt detection module is circumferentially arranged around the water level detection module, realizing "synchronous acquisition of water level-silt data at the same monitoring point", strong data correlation, and effective volume calculation error ≤±5%; the modules are installed in a centralized manner, reducing the occupation of underground installation space (saving more than 80% of the space occupied by dispersed arrangement), and only the central area needs to be maintained during operation and maintenance, reducing the inspection time by 50%-60% and reducing the labor intensity and safety risk of underground operation and maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is the overall structure schematic diagram of the application.

[0023] Figure 2 is the local cross-sectional structure schematic diagram of the water pumping module of the application.

[0024] Figure 3 is the structure schematic diagram of the low-interference water level detection module of the application.

[0025] Figure 4 is the structure schematic diagram of the silt detection module of the application.

[0026] Figure 5 is the local enlarged structure schematic diagram of A of the application Figure 3 .

[0027] In the figure:

[0028] Ceiling plate 1, bottom support frame 2, water pumping module 3, water pumping vertical pipe 31, outer protective cover 32, filter hole 33, water pumping pipe 34, water pumping main pipe 35, low-interference water level detection module 4, protective detection pipe 41, ultrasonic water level sensor 42, early warning water level sensor 43, standard water level sensor 44, water inlet window 45, window filter screen plate 46, silt detection module 5, silt pipe 51, air vent 52, silt inlet 53, silt probe 54, water pumping main pipe 6, low-power water pumping module 7, high-power water pumping module 8. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0030] As shown in the accompanying drawings: Figures 1-5

[0031] The present application provides a mine flood early warning device, which comprises a ceiling plate 1, a bottom support frame 2, a water pumping module 3, a low-interference water level detection module 4, a silt detection module 5, a water pumping main pipe 6, a low-power water pumping module 7, and a high-power water pumping module 8. The water sump top and bottom are respectively fixedly installed with corresponding ceiling plates 1 and bottom support frames 2. The water pumping module 3 is fixedly installed between the ceiling plate 1 and the bottom support frame 2. The low-interference water level detection module 4 is fixedly installed on the ceiling plate 1. The silt detection module 5 of different heights is fixedly installed on the bottom support frame 2. The water pumping module 3 is connected with the water pumping main pipe 6. The water pumping main pipe 6 is connected with the low-power water pumping module 7 and the high-power water pumping module 8 through pipes.

[0032] ​Further, the water pumping module 3 includes a water pumping vertical pipe 31, an outer protective cover 32, filter holes 33, water pumping pipe openings 34, and a water pumping main pipe 35, wherein: the water pumping vertical pipe 31 is made of 316L stainless steel (resistant to mine water corrosion, tensile strength ≥520 MPa), and the upper and lower ends thereof are fixedly connected to the ceiling plate 1 (Q235 steel material, thickness ≥10 mm) and the bottom support frame 2 (same material as the ceiling plate, with a reinforcing rib welded at the bottom) through flanges with sealing pads, respectively, with a verticality error ≤0.5° (calibrated by a level), so as to avoid uneven water inflow of the water pumping pipe openings 34 due to inclination; the outer protective cover 32 is fixedly installed on the outer part of the water pumping vertical pipe 31 through M8 stainless steel bolts, and is a rectangular filter screen cover body structure (the frame is made of 304 stainless steel, and the filter screen is a high polymer wear-resistant nylon screen), with a height consistent with that of the water pumping vertical pipe 31, and filter holes 33 (aperture 5-8 mm, hole spacing 15-20 mm, suitable for filtering coal cinder, rock powder and other impurities in mine water to prevent large impurities from entering) evenly and penetratingly arranged on the side walls of the cover body.

[0033] Further, the outer protective cover 32 fixedly installed on the outer part of the water pumping vertical pipe 31 is a rectangular filter screen cover body structure, with a filter screen mesh number of 10-15 (which can filter impurities with a diameter >10 mm, and also avoids frequent clogging of the filter holes 33), and the top and bottom of the cover body are fixed to the flange edges of the water pumping vertical pipe 31 through bolts, so as to facilitate the removal and cleaning of the impurities accumulated on the surface of the filter screen; the water pumping pipe openings 34 vertically and equidistantly arranged on the water pumping vertical pipe 31 are completely located inside the outer protective cover 32, wherein the water inflow end of each water pumping pipe opening 34 is coaxially installed with a water level sensor (capacitive water level sensor, measurement range 0-5 m, error ±2 mm, output signal 4-20 mA) through threaded connection, and the water outflow end of the water pumping pipe opening 34 is installed with an electromagnetic valve (IP68 level waterproof, through diameter consistent with that of the water pumping pipe opening 34, made of 316L stainless steel, response time ≤0.5 s, and can withstand 1.0 MPa water pressure) through flange connection, and the water level sensor and the electromagnetic valve correspond one-to-one to form a "detection-control" linkage unit, so as to ensure that the water pumping pipe opening 34 is opened only when the corresponding water level is met.

[0034] Further, the water pumping main pipe 35 provided on the water pumping vertical pipe 31 is located below the outside of the outer shield 32, specifically, the pipe axis of the water pumping main pipe 35 is 10-15 cm lower than the bottom edge of the outer shield 32, so as to avoid a small amount of sundries accumulated in the outer shield 32 from falling into the water pumping main pipe 35; the water pumping vertical pipe 31 is located on the side near the low-interference water level detection module 4 and the sludge detection module 5, wherein the horizontal distance between the water pumping vertical pipe 31 and the low-interference water level detection module 4 is 1.0-1.5 m (to ensure that the data acquisition areas of the two overlap, so as to facilitate water level-water pumping collaborative control), and the horizontal distance between the water pumping vertical pipe 31 and the surrounding sludge detection module 5 is 0.8-1.2 m (to avoid the water flow disturbance affecting the sludge deposition state when pumping water, and to ensure the accuracy of the sludge detection data), so as to form a close-collaborative layout of “water pumping-water level-sludge”, thereby reducing data transmission delay.

[0035] Further, the low-interference water level detection module 4 comprises a protective detection pipe 41, an ultrasonic water level sensor 42, a pre-warning water level sensor 43, a standard water level sensor 44, a water inlet window 45 and a window filter screen plate 46, wherein: the protective detection pipe 41 is made of glass steel (diameter 150-200 mm, wall thickness ≥8 mm, acid and alkali corrosion resistant, low linear expansion coefficient), and the upper end thereof is fixed to the center position of the ceiling plate 1 through a flange (coaxiality error ≤0.3°); the ultrasonic water level sensor 42 is fixedly installed on the inside top of the protective detection pipe 41 through a support (measurement range 0-10 m, accuracy ±1 mm, sampling frequency 1 Hz, transmission angle ≤8°, to avoid side wall reflection interference), which can realize full-range water level continuous detection; the pre-warning water level sensor 43 and the standard water level sensor 44 are fixedly installed on the inner wall of the protective detection pipe 41 along the vertical direction (both are drop-in type static pressure sensors, measurement range 0-6 m, error ±3 mm), wherein the pre-warning water level sensor 43 is located above the inside of the protective detection pipe 41 (1 / 3 height from the top, corresponding to the safety warning water level of the water sump), and the standard water level sensor 44 is located at the middle position of the inside of the protective detection pipe 41 (corresponding to the daily operation water level of the water sump); the water inlet window 45 is provided on the side wall of the protective detection pipe 41 along the vertical axis at equal intervals (interval 0.8-1.2 m), which is a rectangular opening with a size of 100 mm×50 mm and a rounded edge to avoid scratching the filter screen; the window filter screen plate 46 is fixedly installed outside each water inlet window 45 through bolts (304 stainless steel woven mesh, pore size 2-3 mm, to filter fine particle sundries, and to ensure that the water in the pipe and the main water body of the water sump flow through, and the water quality is consistent).

[0036] Further, the lower end of the protection detection pipe 41 is fixedly connected with the concrete pouring pile (C30 concrete, section size 500mmx500mm, buried depth≥600mm, top pre-buried steel plate) at the bottom of the water sump through 4 groups of M16 stainless steel foundation bolts, ensuring the long-term vertical stability of the protection detection pipe 41 without settlement and inclination; the water inlet windows 45 are equally arranged along the vertical axis and are arranged at the upper part of the protection detection pipe 41, the spacing between adjacent water inlet windows 45 matches the spacing of the water suction ports 34 (0.8-1.2m), and the lowermost water inlet window 45 is located at a distance of≥300mm from the bottom of the water sump (to avoid being blocked by the bottom sludge); the early warning water level sensor 43 and the standard water level sensor 44 fixedly installed on the inner wall of the protection detection pipe 41 are located between two adjacent water inlet windows 45 (for example, the standard water level sensor 44 is located between the second and third water inlet windows 45), ensuring that the sensors contact the stable water body filtered by the filter screen and avoiding detection errors caused by water flow disturbance; the installation height of the standard water level sensor 44 is flush with the designed daily water level of the water sump, and the installation height of the early warning water level sensor 43 is flush with the designed warning water level of the water sump, forming a double water level control of "daily monitoring + emergency warning".

[0037] Further, the water suction module 3, the low-interference water level detection module 4 and the sludge detection module 5 are all installed vertically to the ground, and are calibrated by a laser level meter during installation, with a verticality deviation≤0.5° (to prevent the inclination from causing the detection angle of the sensor to deviate or the water suction port 34 to be difficult to fill with water); the low-interference water level detection module 4 (the protection detection pipe 41) is at the center, and a plurality of sludge detection modules 5 are evenly arranged around it, with a specific number of 3-4 (to ensure that the sludge deposition state of the central area of the water sump is detected from different directions and to avoid missing detection caused by local uneven deposition), the horizontal distance between each sludge detection module 5 and the low-interference water level detection module 4 is consistent (1.0-1.2m), and they are arranged in an equilateral triangle or a square (for example, 3 modules are arranged in an equilateral triangle, and 4 modules are arranged in a square), and the bottom of all the sludge detection modules 5 is fixed with the bottom support frame 2, and the top height is lower than the lowest water inlet window 45 of the low-interference water level detection module 4 (to avoid blocking the water flow for water level detection).

[0038] Further, the silt detection module 5 includes a silt pipe 51, an exhaust hole 52, a silt inlet 53, and a silt probe 54, wherein: the silt pipe 51 is made of 316L stainless steel seamless pipe (diameter 80-100 mm, wall thickness ≥6 mm, inner wall polished treatment to prevent silt adhesion); an exhaust hole 52 (hole diameter 5-8 mm, hole opening welded with stainless steel dust screen to prevent foreign matter from entering and ensure air exhaust in the pipe, to avoid silt accumulation due to air pressure) is provided through the top of the silt pipe 51 (5-10 mm away from the pipe opening); two symmetrical silt inlets 53 (rectangular openings with chamfered edges for easy silt entry) are provided through the lower side wall of the silt pipe 51 (10-15 cm away from the pipe bottom, higher than the installation position of the silt probe 54); the silt probe 54 (radio frequency admittance type silt probe, measurement range 0-50 cm, resolution 1 mm, anti-hanging material design to avoid misjudgment caused by silt adhesion) is fixedly installed at the bottom of the silt pipe 51 by screw connection; the bottom of the silt probe 54 is fixedly connected with the bottom bracket 2 (reserved mounting hole) through a flange, ensuring that the silt probe 54 is coaxial with the silt pipe 51, and the probe sensing surface faces upward, directly contacting the silt entering the pipe.

[0039] Further, the silt pipe 51 of each silt detection module 5 is not the same height, and the detection nodes covering the whole cycle of silt deposition in the silt chamber are formed by height grading, and the specific grading standards are: low-height silt pipe 51 (height 0.3-0.5 m, corresponding to the initial silt deposition stage, the silt inlet 53 is 10-15 cm away from the pipe bottom, and when triggered, it prompts “silt starts to accumulate, regular monitoring needs to be started”), medium-height silt pipe 51 (height 0.8-1.0 m, corresponding to the medium-term silt deposition stage, the silt inlet 53 is 15-20 cm away from the pipe bottom, and when triggered, it prompts “the silt chamber volume has been reduced by 10%-15%, silt removal plan needs to be arranged”), high-height silt pipe 51 (height 1.3-1.5 m, corresponding to the critical silt deposition stage, the silt inlet 53 is 20-25 cm away from the pipe bottom, and when triggered, it prompts “silt is close to the safety threshold, immediate silt removal is needed”); the silt detection module 5 in the same silt chamber needs to include low, medium, and high heights, and the number of silt pipes 51 at each height is balanced (for example, 3 modules, 1 each of low, medium, and high; 4 modules, 1 low, 2 medium, and 1 high), ensuring that the detection data is comprehensive and has no blind area.

[0040] Further, the pumping module 3, the low-interference water level detection module 4, the silt detection module 5, the pumping main pipe 6, the low-power pumping module 7, and the high-power pumping module 8 are respectively connected through shielded twisted pair wires (model RVSP-2×1.5 mm 2The controller (selected from a Siemens S7-1200 series PLC, with anti-explosion certification, a working temperature of -20°C to 60°C, and support for analog and switching signal acquisition) of the mine control room is connected to the water pumping module 3 (with anti-electromagnetic interference, a transmission distance of less than 1000 m, and compliance with mine anti-explosion requirements) through an electrical signal, and the specific connection logic and functions are as follows:

[0041] Further, the water level sensors (outputting 4-20 mA analog signals) of the water pumping ports 34 in the water pumping module 3, the ultrasonic water level sensors 42 (RS485 digital signals) of the low-interference water level detection module 4, the pre-warning / standard water level sensors (4-20 mA analog signals), and the silt probes 54 (4-20 mA analog signals) of the silt detection module 5 are respectively connected to the analog input module (model SM1231, 16 channels, 16-bit resolution) of the controller through signal cables, to transmit water level and silt height data in real time. The pressure sensor (outputting 4-20 mA analog signals to monitor the water pressure in the pipe) installed on the water pumping main pipe 6 is also connected to the module to avoid damage to the pipe due to overpressure.

[0042] Further, the electromagnetic valves (requiring 24 VDC power supply and outputting switching signals) of the water pumping ports 34 in the water pumping module 3, the low-power water pumping module 7 (containing a motor contactor and a frequency converter, outputting switching and analog signals to control start / stop and speed), and the high-power water pumping module 8 (the same as the low-power module, with an additional overload protection signal) are respectively connected to the switching output module (model SM1222, 16 channels, with short-circuit protection) and the analog output module (model SM1232, 4 channels, to control the frequency of the frequency converter) of the controller through cables, to realize "on-demand start / stop and speed regulation".

[0043] Further, the controller is pre-set with a linkage program, for example, when the pre-warning water level sensor 43 of the low-interference water level detection module 4 is triggered (analog signal ≥ 18 mA) and the silt probe 54 of the high-height silt pipe 51 is not triggered, the controller automatically outputs signals to close the electromagnetic valves of the low and medium-height water pumping ports 34, open the electromagnetic valve of the high-height water pumping port 34, and start the high-power water pumping module 8 (analog output 50 Hz, full-load water pumping); when the standard water level sensor 44 is triggered (analog signal ≥ 12 mA) and the low-height silt probe 54 is triggered, the controller opens the electromagnetic valve of the medium-height water pumping port 34 and starts the low-power water pumping module 7 (analog output 30 Hz, low-load water pumping); if the signal of a certain sensor is interrupted (such as the silt probe 54 has no output), the controller immediately triggers an audible and light alarm (connected to the alarm module of the control room) and switches to the data of the backup sensor (such as the adjacent medium-height silt probe 54), to ensure uninterrupted operation of the system.

[0044] Further, the controller communicates with the mine monitoring system (SCADA system) through the Ethernet module (model SM1243-1) to upload the running state of each module, water level / mud data in real time, and receive remote control instructions (such as manual start / stop of the water pumping module); all electrical signal connections are explosion-proof sealed (cable joints use explosion-proof junction boxes, model BHG1-10 / 250), meeting the requirements of the Coal Mine Safety Regulations for underground electrical equipment.

[0045] Working principle

[0046] First, the ceiling plate 1 and the bottom support frame 2 are fixed to the top and bottom of the water sump, respectively, to provide a stable installation foundation for the entire device. The water pumping module 3, the low-interference water level detection module 4, and the mud detection module 5 are all installed vertically between the two, forming a centralized monitoring and water pumping system.

[0047] The low-interference water level detection module 4 monitors the water level in the water sump in real time: the protective detection tube 41 provides protection for the internal sensor, and the water in the water sump enters the tube through the water inlet window 45. The window filter plate 46 filters the impurities in the water to ensure the stability of the water in the tube. The ultrasonic water level sensor 42 emits sound waves from the top down to continuously detect the full range of water levels. The early warning water level sensor 43 and the standard water level sensor 44 sense the warning water level and the daily water level, respectively, forming a double water level monitoring system.

[0048] The mud detection module 5 synchronously monitors the deposition state of the water sump: different height mud pipes 51 (low, medium, high) are distributed around the low-interference water level detection module 4, and the mud enters the pipe through the mud inlet 53. The air vent 52 expels the air in the pipe to avoid hindering the entry of the mud. The mud probe 54 senses the mud entering the pipe. The low-height mud pipe 51 corresponds to the initial deposition, the medium-height corresponds to the medium-term deposition, and the high-height corresponds to the critical deposition, achieving full-cycle monitoring of the mud.

[0049] The water pumping module 3 performs water pumping operations according to the water level and mud data: the outer shield 32 filters large impurities in the water sump through the filter hole 33, protecting the water pumping port 34 on the water pumping vertical pipe 31. The water level sensor of the water pumping port 34 detects the corresponding height of the water level, and the electromagnetic valve controls the opening according to the detection result. After the water pumping port 34 that meets the conditions is opened, the water enters the water pumping main pipe 35 through the water pumping vertical pipe 31 and the water pumping main pipe 35, and then enters the water pumping main pipe 6, and is discharged from the water sump by the low-power water pumping module 7 (daily small water volume) or the high-power water pumping module 8 (emergency large water volume).

[0050] The controller receives the water level signal of the low-interference water level detection module 4, the silt signal of the silt detection module 5 and the state signal of the water pumping module 3, and realizes linkage control through a preset program: when the water level reaches the warning value and there is no high-height silt, the high-height water pumping port 34 is opened and the high-power water pumping module 8 is started; when the water level is a daily value and there is low-height silt, the medium-height water pumping port 34 is opened and the low-power water pumping module 7 is started; if the sensor fails, the controller triggers an alarm and switches to backup data, and at the same time uploads all states to the mine monitoring system, completing the water disaster early warning and prevention and control closed loop.

[0051] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications, changes, omissions, substitutions and adaptations can be made by those skilled in the art without departing from the application, which is defined by the following claims and their equivalents.

Claims

1. A mine flood warning device, characterized in that: The system includes a ceiling panel (1), a base frame (2), a pumping module (3), a low-interference water level detection module (4), a sludge detection module (5), a main pumping pipe (6), a low-power pumping module (7), and a high-power pumping module (8). The ceiling panel (1) and the base frame (2) are fixedly installed at the top and bottom of the water tank, respectively. The pumping module (3) is fixedly installed between the ceiling panel (1) and the base frame (2). The low-interference water level detection module (4) is fixedly installed on the ceiling panel (1). Several sludge detection modules (5) of different heights are fixedly installed on the base frame (2). The pumping module (3) is connected to the main pumping pipe (6). The main pumping pipe (6) is connected to the low-power pumping module (7) and the high-power pumping module (8) through pipes.

2. The mine flood warning device as described in claim 1, characterized in that: The pumping module (3) includes a pumping riser (31), an outer cover (32), filter holes (33), a pumping port (34), and a main pumping pipe (35). The upper and lower ends of the pumping riser (31) are fixedly connected to the ceiling plate (1) and the base bracket (2), respectively. The filter holes (33) are evenly distributed and penetrated on the outer cover (32) fixedly installed on the outside of the pumping riser (31). A number of pumping ports (34) are provided on the pumping riser (31). The main pumping pipe (35) provided on the pumping riser (31) is connected to the main pumping pipe (6).

3. The mine flood warning device as described in claim 2, characterized in that: The outer protective cover (32) fixedly installed on the outside of the water pumping riser (31) is a rectangular filter screen cover structure. The water pumping ports (34) arranged vertically and equally spaced on the water pumping riser (31) are located inside the outer protective cover (32). Each water pumping port (34) is equipped with a water level sensor and a solenoid valve.

4. The mine flood warning device as described in claim 3, characterized in that: The main pumping pipe (35) installed on the pumping riser (31) is located outside and below the outer cover (32), and the pumping riser (31) is located on one side near the low interference water level detection module (4) and the silt detection module (5).

5. A mine flood warning device as described in claim 4, characterized in that: The low-interference water level detection module (4) includes a protective detection tube (41), an ultrasonic water level sensor (42), an early warning water level sensor (43), a standard water level sensor (44), a water inlet window (45), and a window filter plate (46). The upper end of the protective detection tube (41) is fixedly installed on the ceiling plate (1). The ultrasonic water level sensor (42) is fixedly installed on the top inside the protective detection tube (41). The early warning water level sensor (43) and the standard water level sensor (44) are fixedly installed on the inner wall respectively. The water inlet window (45) is opened through the protective detection tube (41), and the window filter plate (46) is fixedly installed on each water inlet window (45).

6. The mine flood warning device as described in claim 5, characterized in that: The lower end of the protective detection pipe (41) is fixed to the bottom pile of the water tank by anchor bolts. The water inlet window (45) is opened through the protective detection pipe (41) and is equidistantly arranged along the vertical axis. The early warning water level sensor (43) and the standard water level sensor (44) are fixedly installed on the inner wall of the protective detection pipe (41) and are located between the water inlet window (45). The standard water level sensor (44) is installed in the middle of the inside of the protective detection pipe (41), and the early warning water level sensor (43) is installed in the upper part of the inside of the protective detection pipe (41).

7. A mine flood warning device as described in claim 6, characterized in that: The pumping module (3), the low-interference water level detection module (4) and the silt detection module (5) are all installed vertically to the ground, and several silt detection modules (5) are arranged around the low-interference water level detection module (4).

8. A mine flood warning device as described in claim 7, characterized in that: The sludge detection module (5) includes a sludge pipe (51), an exhaust hole (52), a sludge inlet (53), and a sludge probe (54). The exhaust hole (52) is provided through the top of the sludge pipe (51), and the sludge inlet (53) is provided through the sludge pipe (51). The sludge probe (54) is installed at the bottom inside the sludge pipe (51), and the bottom of the sludge pipe (51) is fixedly connected to the base frame (2).

9. A mine flood warning device as described in claim 8, characterized in that: The height of the sludge tube (51) of each sludge detection module (5) is different, and the detection nodes are divided into three types: low height, medium height and high height.

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