Mobile automatic calibration and adjustment of coal mine gas detectors
(57) Abstract:The invention relates to mining, mining, oil and gas industry, in particular to installations carrying out the setting and adjustment of gas detectors with remote sensors, type at-1 and at-3. The invention consists in the fact that mobile automatic calibration and adjustment of the mine detectors gas contains relay 1 time 2 switch, a standalone power source 3, the inverter 4 voltage relays 5 times, the first Board 6, the stabilizer 7, actuator 8, the blocks 9 of the regulations, the voltmeters 10, electronic components 11 gas detectors, remote sensors 12, the calibration gas cylinders, electro-pneumatic valves 11, the control unit 15 of the choice of gas concentration, the third relay 16 time, the second Board 17 mixer-dispenser 18, rotameters 19, the Converter 20 voltage. 1 Il. The invention relates to mining, mining, oil and gas industry, in particular to installations carrying out the setting and adjustment of gas detectors with removable sensors, type at-1 ATZ-1.The number of known installations and devices, prednaznachen is ontrol health functional elements (and.with. N 1588876, CL E 21 F 17/18, 1990). Similar technical solution is a device for controlling sensors gas protection.with. N 1689650, CL E 21 F 17/18, 1990) containing the switch, time relay, block light indication.The disadvantages of these devices include: the need to stand preheating of gas detectors, high power consumption and the inability calibration using calibration gas mixture (ASG).Closest to the present invention is an automated line calibration and commissioning of coal mine gas detectors  contains the nodes and blocks, electrically and pneumatically interconnected, such as pre-training, switch, rotameters, scoreboards, time relays and alarms gas.The disadvantages of this automated line are: the inability to perform automatic calibration and adjustment, as the device prior preparation is not electrically connected with the stand of diagnosis, as well as a large power consumption and the need for connection to the grid 220, which excludes the possibility of this line in the mobile laboratory using a standalone power source, and therefore eco and calibration and adjustment, while significantly reducing energy consumption.This goal is achieved by the fact that mobile automatic installation is equipped with a voltage Converter, switch, regulator, calibration cylinders-gas mixture, an Electromechanical unit selection gas concentration and gas detector, made of electronic unit and remote sensing element, the output of the first time relay connected to the input switch, the first output of a standalone power source connected in series through normally closed contact of the first relay time and the corresponding NC contact switch connected to each of the remote sensing element, a second output, a standalone power source through the normally open contact of the first relay time is connected to the voltage Converter and to the input of the second relay time the output of which is connected with the first Board, the third output, a standalone power source through the normally closed contact of the second relay time is connected to the input of the Electromechanical unit of the concentration of gas cylinders of calibration gas mixture through the respective electro-pneumatic valve connected to the mixer-dispenser, and the outputs of the Electromechanical unit choice of concentration of the scoreboard, moreover, the output of the voltage Converter connected in series through the stabilizer, block adjustment, electronic level switch gas and break contact of the switch is connected to each of the remote sensing element.The drawing shows a structural diagram of the proposed installation.This unit is designed for operation in a mobile laboratory using a standalone power source.Mobile automatic calibration and adjustment of coal mine gas detectors made in the same metal frame, inside of which is electrically introduced: relay 1 time, the output of which is connected to the first input of the switch 2, a standalone power source 3 through the contacts of relay 1 time connected to switch 2 and to the input of the voltage transformer 4 and relay 5 time, the output of which is connected boards "End of the warm-up" 6, and the output of the voltage transformer 4 is connected to the inputs of stabilizers 7-1, 7-2, 7-3, the first outputs of which are connected with devices 8-1, 8-2, 8-3, and second outputs through blocks 9-1, 9-2, 9-3 adjustments associated with voltmeters 10-1, 10-2, 10-3, and the inputs of the electronic components of the signaling devices 11-1, 11-2, 11-3, which outputs through commands with electro-pneumatic valves 14-1, 14-2, 14-3, controlled Electromechanical unit 15 of the concentration of CH4associated with the relay 16 time, United with the Board 17, and the outputs of the electro-pneumatic valve 14 through the mixer-dispenser 18 and rotameters 19-1, 19-2, 19-3 gas lines are connected to the inputs of an external sensing elements 12-1, 12-2, 12-3, in addition, a standalone power source 3 is connected through a transformer 20 voltage device 21 determining the health of methane analyzers and Electromechanical input unit 15 of the concentration of gas.The device operates as follows.After connecting the unit to the stand-alone source 3 power (battery voltage 12 V) of the voltage (1.5 V) through the normally closed contacts of relay 1 1-1 time and through the normally closed contacts 2-1, 2-2, 2-3 switch 2 is fed to remote sensors 12-1, 12-2, 12-3, at the same time start relay 1 time, starting the countdown time (30 min) required for warm-up remote sensors 12-1, 12-2, 12-3.After 30 min relay 1 time sends a signal to the switch 2 and through switch contacts 2-1, 2-2, 2-3 is the connection of the outputs of electronic components signalizatsia, and pins 1-2 closed and the voltage of 12 V from an auxiliary power source 3 through the contacts 1-2 is input to the inverter 4 voltage and the second relay 5 time starting the report time 10 min required for warm-up stabilizers 7-1, 7-2, 7-3, e-block detectors 11-1, 11-2, 11-3 and additional heating of the remote sensors 12-1, 12-2, 12-3. Completed the preparatory cycle by turning on the scoreboard, "the End of the warm-up" 6 and connecting the Electromechanical unit 15 choice of gas concentration by blocking contacts 5-1 relay 5 time to a standalone power source 3.Converter output 4 voltage sets the voltage 127 V 50 Hz supply stabilizers 7-1, 7-2, 7-3, issuing voltage 52 B2-50 Hz through blocks 9-1, 9-2, 9-2 adjustments and controlling voltmeters, 10-1, 10-2, 10-3 e-blocks detectors 11-1, 11-2, 11-3, connected through a switch with 2 remote sensors 12-1, 12-2, 12-3, respectively.When voltage is applied across the contacts 5-1 relay 5 time and through the control unit 15 of the concentration of gas in one of the electro-pneumatic valves 14-1, 14-2, 14-3 corresponding mixture from one container ASG 13-1, 13-2 or 13-3,meters 19-1, 19-2, 19-3 arrives at the remote sensors 12-1, 12-2, 12-3.The filling gas pipeline methane-air mixture (1 min) is maintained through the third relay 16 time, starting Electromechanical unit 15, and is displayed on the display 17.In case of discrepancy of data from the electronic alarm unit of gas concentration and the impossibility to install them using the built-in configuration items, the conclusion about the failure of this gas detector, then its functional units are subject to review and adjustment on the device 21 determining the health of methane detectors that connect to a standalone power source 3 through a transformer 20 voltage, converts 12 volt DC power in 1278 50 Hz similar to Converter 4.Thus an advantage of the invention is to improve the performance verification and adjustment, while significantly reducing energy consumption by introducing in the installation of the converters 4, 20 voltage switch 2, stabilizers 7, calibration gas cylinders 13 and Electromechanical unit 15 choice of gas concentration. MOBILE AUTOMATIC CALIBRATION AND adjustment of Sahtugot through which the flowmeter is connected to the gas detectors, the adjustment blocks and boards, characterized in that it is equipped with a voltage Converter, switch, regulator, calibration cylinders-gas mixture, an Electromechanical unit selection of gas concentration, the gas detector is made of electronic unit and remote sensing element, the output of the first time relay connected to the input switch, the first output of a standalone power source connected in series through normally closed contact of the first relay time and the corresponding NC contact switch connected to each of the remote sensing element, a second output, a standalone power source across normally open contact of the first relay time is connected to the voltage Converter and to the input of the second relay time the output of which is connected with the first Board, the third output, a standalone power source through the normally open contact of the second relay time is connected to the input of the Electromechanical unit of the concentration of gas cylinder calibration gas mixture through the corresponding electropneumatically valve connected to the mixer-dispenser, and the outputs of the Electromechanical unit of the concentration of gas is connected to the control inputs eeaieia through connected in series stabilizer, block adjustment, electronic level switch gas and break contact of the switch is connected to each of the remote sensing element.
FIELD: mining industry, particularly methods or devices for drawing-off gases.
SUBSTANCE: method involves taking methane concentration in characteristic mining face points by sensors, wherein the characteristic points are selected in accordance with requirements fixed by Safety Rules; recording and processing methane sensor readings in central station; transmitting the methane sensor readings to signal receiving block; performing primary processing of the received signals and de-energizing bottomhole mechanisms; inputting safety factor, namely maximal value of gaseous methane content, which is less than critical methane concentration value and takes into consideration response time of methane emission control system; automatically forming commands aimed at cutter-loader output regulation by reducing or increasing speed of cutter-loader feeding if one sensor detects methane concentration reduction or growth from zero to maximal value after the received signal processing to provide safe operation in the mining face until critical methane concentration is reached in mining face atmosphere without bottomhole mechanism de-energizing. If above methane emission control system can not provide maximal methane content in mine face atmosphere the system will de-energize all bottomhole mechanisms with taking into consideration of response time of methane emission control system.
EFFECT: prevention of critical explosive methane concentration in mine without bottomhole mechanism operation stoppage.
FIELD: alarm sensors for use in underground mines.
SUBSTANCE: sensor contains piezoelectric generator of sound signal with two input contacts for feeding powering voltage of certain frequency and circuit assembly, connected to power source for generation of powering voltage. Piezo-electric generator of sound signal has additional output contact, which, when powering voltage is fed onto sound signal generator from circuit assembly, generates response voltage signal, which is a value appropriate for force of sound created by alarm sensor.
EFFECT: creation of sensor which may be used at resonance frequency, therefore, at maximally possible loudness of sound signal, and which makes it possible to transfer confirmation signal about successful output of sound alarm to control system of portable collapsible lining frame.
12 cl, 3 dwg
FIELD: electrical engineering.
SUBSTANCE: invention relates to devices for determining exceedance of methane safe concentration level, which can be used in mining and chemical industry in air and gas control systems. The device has a power supply for the sensor, unit for forced ignition of the gas mixture, comprising a voltage converter and an igniter, blast-proof combustion chamber, comprising an insulating plug and an inspection window, device for recording ignition of the gas mixture, comprising a photodetector and a unit for processing explosion information, unit for generating a signal from the sensor to the main cable line and into local signalling presence of a lower explosive limit of gas for the given sensor. The device also contains a unit for generating voltage in form of regular pulse sequences for forced ignition, a heater and a unit for regulating its temperature. One output of the voltage converter is connected to the input of the unit for generating voltage, and the other output is connected to the input of the unit for regulating temperature of the heater.
EFFECT: increased efficiency of control.
SUBSTANCE: group of inventions is related to system and methods for control of getting machine along bottomhole in underground mine tunnel, and also to mining face for method realisation. Method includes measurement of gas concentration and depending on measurement results, generation of warning signal. At the same time volume of production achieved by getting machine is additionally established. In case of insufficient correlation between volume of production and gas concentration, a warning signal is generated.
EFFECT: invention provides for possibility to minimise danger of methane gas explosion in mining face, to establish fact of gas sensor failure and/or manipulation with it.
26 cl, 3 dwg
FIELD: physics; communication.
SUBSTANCE: invention relates to radio engineering and can be used in a shaft to carry out rescue operations by mine rescue brigades. The shaft emergency communication system based on a wireless sensor network has on the surface of the shaft a control unit of a control centre with a telephone set and a telephone line which links the control unit with underground users. In the underground mine, the system has a wireless sensor network consisting of computing-switching radio devices - relays and a terminal device which is connected to the telephone line through a device for galvanic separation of circuits and an adapter. Mobile user devices are placed in separate illumination devices of the shaft and are connected to the nearest relays of the sensor network over a radio telephone channel.
EFFECT: invention enables establishment of a voice (telephone) radio channel for communication between underground users and with the surface of the shaft, increases the range of the established communication, increases reliability of underground radio communication.
SUBSTANCE: system includes the following which is installed in mine working: sensors of monitoring mine environment background (temperature, gas content, methane, dust, displacement of beds, etc.), recording of location and direction of movement of mine workers, movable video and infrared cameras, device for detection and formation of control commands, terminals of operators performing the monitoring of mine environment background and location of mine workers and control of the system operation. Mine workers are provided with transponders and individual pendants. Transponders are intended to exchange code radio signals in request-reply mode with transmitting-receiving devices, which are located along mine working, which allows performing the monitoring of location and movement of mine workers. Individual pendants send individual light code signals in acoustic, infrared and radio ranges of waves; at that, sent codes are identified with personality of mine worker. Device for detection and formation of control commands, as well as database to it are implemented in computer. Database includes the data on mine working plan, location of sensors, coordinates of request-reply devices, individual codes of transponders and owners identified as per them, threshold parametres of emergency situations, modulation parametres of individual light code signals of pendants. Besides in mine working there arranged are movable video and infrared cameras by means of which the situation can be controlled, as well as devices for activation of individual pendants and detection of individual light code signals sent with pendants in acoustic, radio and infrared wave ranges. All sensors, transmitting-receiving devices, detection, activation devices of individual pendants, movable video and infrared cameras are connected to device of detection and formation of control commands.
EFFECT: monitoring of the well background, just-in-time warning of workers about threats, evacuation control, search of those who are suffering distress.
10 cl, 2 dwg
SUBSTANCE: casing of the device with electric drive, which is used in the conditions in which there is danger of explosions, includes loud-speaker connected to electric part. At that, loud-speaker and electric part except electric connection are fully enclosed with casing consisting of gas-permeable and noncombustible material. Invention also refers to the casing of the device with electric drive, which contains light source, as well as the method for obtaining porous material for these casings.
EFFECT: release of pressure drop in case of explosion, owing to the casing itself, capability of discharging the mixture of ignited gases through casing walls to the outside; prevention of the medium ignition outside the casing, cooling action of the casing material on evolved gases, and capability of acoustic waves to penetrate to the outside without attenuation.
14 cl, 3 dwg
SUBSTANCE: proposed system consists of single stationary reader located at the route start, mobile recording devices arranged on moving objects, and mark point radio beacons arranged at particular route points. Note here that stationary readers and mobile recorders are equipped with limited-range FR-signal transceivers, whilea mark point beacons are provided with limited-range transmitters transmitting in intermittent mode the data containing unique number identifying location of mark point beacon. Moving object coming into controlled zone and equipped with aforesaid recorder receives signal from relevant radio beacons to fix their unique numbers and registration time. Received data is transmitted by mobile recorder after reception of code combination of request intermittently irradiated by stationary reader transceiver.
EFFECT: expanded operating performances.
7 cl, 1 dwg
SUBSTANCE: in each compact group of employees there is a smoking employee, equipped with an individual smoking pipe having a code key to open protective folds of an individual lighter with a heating element. The lighter has a button for ignition only with protective folds open that are opened by means of a code key of an individual smoking pipe, and also a locking mechanism with a bimetal element. The locking mechanism is designed to remove an individual lighter with a heating element from an individual smoking pipe only after cooling of the latter. Besides, the individual lighter with a heating element has a chamber made from a close-meshed net made as capable of transmission of atmosphere with combustible gas into the chamber connected with the individual smoking pipe.
EFFECT: simplified monitoring of methane content in that mine, where miners are currently located.
SUBSTANCE: automated communication system comprises a control panel with a PC and software, a station of information collection and transfer, M underground wire communication channels. At the same time each communication channels includes a safety rope, the first and second transceivers, arranged at the ends of the safety rope, every of which comprises an antenna made in the form of a metal rod coated with a layer of dielectric. The safety rope is made in the form of woven nylon threads and a multi-strand metal conductor coated with a layer of dielectric. Transceivers may be galvanically connected to a multi-strand metal conductor of the safety rope, or may not have galvanic contact with a multi-strand metal conductor.
EFFECT: higher safety of salvage operations in emergency conditions.