State monitoring system and monitoring method for long-distance liquid supply system

Abstract

The invention relates to a state monitoring system and monitoring method for a long-distance liquid supply system. The system comprises hydraulic supports, an upper computer, an acquisition card and sensors, wherein the plurality of hydraulic supports are distributed and mounted on a working face, the sensor is mounted on each hydraulic support, and the sensors are communicated with the upper computer through the acquisition card; by means of the same monitoring system, pressure data of a liquid supply system pump station outlet, a hydraulic support liquid inlet and a hydraulic support liquid return opening are collected, the upper computer obtains support electro-hydraulic system control signals of the hydraulic supports at the same time, the action cycle of the hydraulic support serves as a period, the obtained data are divided, so that the output pressure fluctuation condition of the liquid supply system and the working face pressure demand response lag condition of the liquid supply system when the hydraulic support components act in a timing manner are obtained; necessary data support and theoretical basis are provided for pressure control method research of a support hydraulic system and a liquid supply system power source and pressure continuous control research of a high-pressure large-flow high-water-base element.

Description

technical field [0002] The invention relates to a state monitoring system and a monitoring method of a long-distance liquid supply system, belonging to the technical field of data processing. Background technique [0003] At present, my country's fully-mechanized mining face equipment is developing towards large-scale and heavy-duty, but the liquid supply system of my country's fully-mechanized mining face has long been unable to meet the needs of safe and efficient mines in terms of liquid supply quality, efficiency, intelligence level, and environmental friendliness. The development requirements have become the bottleneck restricting the implementation of automatic mining in the fully mechanized mining face. The current problems in the liquid supply system include: long-distance liquid supply and strong time-varying characteristics of system load pressure and load flow requirements, pressure and flow control of high-pressure, large-flow, high-water-based multi-pump power so...

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Problems solved by technology

[0003] At present, my country's fully-mechanized mining face equipment is developing in the direction of large-scale and heavy-duty, but the liquid supply system of my country's fully-mechanized mining face has long been unable to meet the needs of safe and efficient mines in terms of liquid supply quality, efficiency, intelligence level, and environmental friendliness. Development requirements have become the bottleneck restricting the implementation of automatic mining in fully mechanized mining face

The current problems in the liquid supply system include: long-distance liquid supply and strong time-varying characteristics of system load pressure and load flow requirements, pressure and flow control of high-pressure, large-flow, high-water-based multi-pump power sources, and difficulty in integrating multiple actuators on the working face support The load pressure and the load flow match; resulting in a lag in the response of the long-distance high-pressure and large-flow liquid supply power source to the load and flow demand of the working face, the hydraulic supply pressure and output flow of the power source fluctuate greatly, and it is difficult to meet the timely support of the coal mining face , fast follow-up and other core task requirements

[0004] At the same time, the traditional coal mine underground data monitoring system adopts wired transmission mode. The distance between the data acquisition device and the monitoring point is hundreds of kilometers, the cost of long-distance wiring is high, and the long-term working line is easy to age. It is difficult to troubleshoot the fault location after a system problem occurs. poor maintenance

However, the space of the fully mechanized mining face is narrow, the underground environment is harsh, and there are many electrical equipments, resulting in serious electromagnetic radiation. The existing data acquisition and monitoring system has low data acquisition frequency, poor precision, and weak anti-interference ability, which cannot accurately reflect the changes in the measurement point data in a timely manner. , and the communication rate cannot meet the requirements of fast transmission of large amounts of data

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