Introduction To Industry Scenarios
The core of coal mining is high gas/coal dust explosion risk, strong vibration impact, moisture and dust, high corrosion (mine water), 24-hour continuous operation, highest safety level (explosion-proof/intrinsic safety), unmanned/intelligent trend, equipment overload, and limited maintenance space.
Typical measuring points:
Fully mechanized mining face: hydraulic support pressure, emulsion pump station pressure, spray dust water pressure, support column expansion pressure, shearer cooling water circuit pressure/liquid level
Excavation working face: cooling pressure/liquid level of excavation machine, pressure difference of dust removal fan, liquid level of roadway drainage water tank, head-on water pressure detection
Underground drainage system: central water tank/mining area water tank liquid level, inlet and outlet pressure of drainage pump, pipeline pressure, pressure difference before and after waterproof gate
Hydraulic/emulsion system: pump station pressure, oil tank level, filter differential pressure, return pressure
Ventilation/Gas Control: Main Ventilation Fan Pressure, Duct Pressure Difference, Gas Drainage Pipeline Pressure, Sealing Pressure
Adapt to Core Products
QDY30A-MK intrinsically safe input type liquid level transmitter for mining (316L/duplex steel IP68、 Explosion proof Exia I Mb, mud/coal dust resistant, -40 ℃~125 ℃, vibration resistant 25G, anti blocking, mine water specific)
QDY60-MK mining emulsion/oil tank dedicated static pressure level transmitter (anti sludge/coal dust adhesion, long-term immersion, zero stability, intrinsic safety explosion-proof, hydraulic station specific)
QDW90A-3051-MK mining high-pressure flange liquid level transmitter (high-pressure anti-corrosion, anti mud blockage, thick wall installation, dedicated for water tanks/large water tanks, explosion-proof certification)
QDKG-MK mining explosion-proof/intrinsic safety intelligent pressure/differential pressure transmitter (0.075 level, anti heavy load impact, 316L/Hastelloy alloy, explosion-proof Exd I Mb/Exo I Mb, stable dust/mud/emulsion environment, high pressure/micro pressure customization, hydraulic support/pump station specific)
GLG-MK mining lightning protection and anti-interference isolator/RS485 (intrinsic safety and explosion-proof, lightning protection, anti strong interference from frequency converters/welding machines, long-distance 15km transmission, dedicated for underground bus, signal redundancy)
S803/SS803-MK mining explosion-proof digital display instrument (IP67, metal explosion-proof shell, UV resistant, vibration resistant, on-site/wall mounted, with sound and light alarm, dedicated for underground tunnels/pump rooms)
Product Function
QDY30A-MK/QDY60-MK+QDW90A-3051-MK liquid level class (water tank/oil tank/cooling water circuit)
Underground central/mining area water tank liquid level: intrinsically safe explosion-proof IP68、 Mud prevention, real-time monitoring of high and low liquid levels, automatic start stop linkage of drainage pumps, prevention of flooding accidents, guarantee of underground operation safety, and compliance with the hydrological monitoring requirements of the Coal Mine Safety Regulations.
Oil level of emulsion pump station oil tank: anti sludge, anti vibration, monitoring oil level, low oil level alarm, preventing emulsion pump from dry grinding and burning, ensuring hydraulic support power stability, and extending the life of core equipment.
Cooling water level of coal mining machine/tunneling machine: anti blocking, temperature resistance, monitoring of cooling water level to prevent equipment overheating and fire caused by liquid interruption, ensuring continuous operation of mining equipment, and reducing downtime due to faults.
Fire/dust sprinkler water tank liquid level: explosion-proof, long-term stable, monitoring liquid level, ensuring sufficient dust/fire water supply, suppressing coal dust flying, reducing gas explosion risk, in compliance with underground fire protection regulations Huainan Qidi Electronics Co., Ltd.
QDKG-MK pressure/differential pressure transmitter (hydraulic support/pump station/ventilation/drainage)
Comprehensive mining hydraulic support pressure: explosion-proof high-pressure type, impact resistant, real-time monitoring of support column pressure (31.5-40MPa), judgment of support strength, warning of roof collapse/collapse, ensuring the safety of the working face, and complying with mining pressure monitoring standards.
Emulsion pump station pressure: high-precision, intrinsically safe and explosion-proof, stable control of pump station pressure (25-31.5MPa), ensuring strong and smooth support movement, preventing overload damage, and improving comprehensive mining efficiency.
Inlet and outlet pressure of underground drainage pump: high pressure anti-corrosion, anti vibration, monitoring pressure, judging pump operation status/pipeline blockage, warning of faults, ensuring efficient drainage system, and avoiding the risk of well flooding.
Main ventilation fan/duct pressure difference: Micro pressure intrinsic safety type, fast response, monitoring pressure difference, judging fan operation status/duct leakage, warning of insufficient ventilation, ensuring underground gas dilution, and preventing gas accumulation and explosion.
Gas drainage pipeline pressure: explosion-proof and anti-corrosion, negative pressure adaptation, monitoring negative pressure, judging drainage effect/pipeline leakage, ensuring gas drainage efficiency, and reducing the risk of gas exceeding the limit.
GLG-MK Mining Isolator (Strong Interference/Long Distance/Explosion proof)
Underground frequency converter/welding machine/coal machine strong interference: intrinsically safe isolation+lightning surge protection, common mode suppression ≥ 60dB, suppressing peak interference and lightning surge, stable signal without jumping, no false alarm/false shutdown, ensuring continuous operation of underground control system, and accurate data uploading to ground dispatch.
Long distance bus transmission underground (10-15km): RS485+Modbus, signal attenuation free, packet loss rate<0.1%, real-time synchronization of all mine data, support for unmanned remote monitoring and intelligent scheduling.
S803/SS803-MK mining digital instrument (underground on-site/pump room/roadway)
On site display of underground pump room/roadway: IP67 explosion-proof, metal shell, anti vibration, intuitive reading for inspection, no entry into dangerous areas, safe and efficient, suitable for humid and dusty harsh underground environments.
Over limit alarm/interlock: relay output+sound and light alarm, emergency start stop linkage of drainage pump/fan, 1-second response, anti flooding well/gas over limit/equipment overheating accident Huainan Qidi Electronics Co., Ltd.
Data upload/remote monitoring: Modbus communication, connected to the coal mine comprehensive automation system, operation data recording, fault tracing, remote operation and maintenance, and improving the level of mine intelligence.
Addressing Industry Issues
Extreme working conditions underground (strong vibration/mud/corrosion), ordinary instruments are prone to damage
Ordinary instruments have poor impact resistance, are prone to blockage, corrode quickly, have insufficient explosion-proof rating, fail for 1-3 months, are frequently replaced, have extremely high underground replacement costs (requiring power outages/shutdowns), and affect mining progress.
The liquid level in the water tank is out of control, and the risk of flooding is extremely high
Ordinary liquid level gauges are prone to scaling/mud blockage, large drift, and lack of explosion protection, resulting in sudden water level rise, delayed drainage, flooding accidents, casualties, and huge losses from production shutdown (daily losses of 500000 to 2 million yuan).
The pressure monitoring of hydraulic supports is inaccurate, and roof accidents occur frequently
Ordinary pressure gauges have large vibration drift, low accuracy, and no explosion-proof, resulting in insufficient support, roof collapse/sheet support, equipment damage, safety accidents, and shutdown rectification.
Strong electromagnetic interference, signal jumping and misoperation
Underground frequency converters/coal machines interfere with PLC false alarms, false shutdowns, and uncontrolled equipment actions, affecting mining continuity, increasing debugging costs, and posing significant safety hazards.
High safety and explosion-proof compliance requirements, ordinary instruments do not meet the standards
In underground gas/coal dust explosion environments, ordinary instruments do not have explosion-proof certification and are prone to sparking, causing explosion accidents, fines for violations, and production shutdowns for rectification.
The maintenance difficulty is high, and the risk of manual inspection is high
The underground environment is harsh, the space is narrow, and there are toxic and harmful gases. The efficiency of manual inspection is low, the risk is high, the cost is high, the data is lagging, and the fault detection is not timely.
Direct Customer Benefits
Benefits of Safety and Accident Prevention (Core)
Hydrological safety: Flood accidents are reduced by 100%, unplanned shutdowns are reduced by ≥ 99%, and annual losses from shutdowns are avoided by ≥ 20 million yuan, ensuring the safety of underground personnel.
Support safety: The accident rate of roof collapse/lining collapse has been reduced by 100%, and the safety accident rate has been reduced by ≥ 98%, in compliance with the "Coal Mine Safety Regulations", avoiding rectification fines of ≥ 1 million yuan.
Explosion proof safety: The risk of gas/coal dust explosion has been reduced by 100%. It has passed the coal mine safety acceptance, complied with production regulations, and has no safety liability accidents.
Equipment reliability and lifespan benefits
Stable under extreme working conditions: The lifespan of the instrument is 4-6 years, the maintenance cycle is extended by 5 times, the annual maintenance cost is reduced by ≥ 85%, and the cost of underground labor replacement/shutdown is reduced by ≥ 3 million yuan.
Core equipment protection: The lifespan of emulsion pumps/coal mining machines/hydraulic supports is extended by 2-3 times, and the annual cost of equipment replacement is reduced by ≥ 5 million yuan.
Production efficiency and capacity benefits
Precise control: The efficiency of the fully mechanized mining face is improved by ≥ 20%, the production capacity of the mine is increased by ≥ 15%, and the annual increase in production and income is ≥ 8 million yuan.
Unmanned operation: Reduce manual inspections by ≥ 90%, save labor/safety protection costs of ≥ 800000 yuan per year, and eliminate high-risk operational risks.
Intelligence and compliance benefits
Accurate and traceable data: meeting the requirements of intelligent construction in coal mines, data is uploaded to ground scheduling, remote monitoring and intelligent scheduling, and management efficiency is improved by ≥ 80%.
Localization substitution: Replace imported mining instruments, reduce procurement costs by 50% -70%, shorten customization cycle to 2-4 weeks, provide 24-hour after-sales response, and save annual procurement/after-sales costs of ≥ 2 million yuan.
