The control device methane
The control device methane is intended for use in various industries, for example in the oil and gas industry for the analysis of gas content in the process of extraction and processing of natural gas and oil. The technical result of the invention is to improve the safety of measuring, the possibility of continuous automated control, the expansion of the scope of this type of device by measuring the content of other gases, improving the accuracy, efficiency and reliability of measurements, the application of the inventive device during operation of pipelines for various purposes, remote removal of the signal from the device. For this purpose, the device comprises a body placed in it a light source, condenser lens, a reflective mirror, the body of the gas and air cavities, gas and air cavities, lens, gas supply, goodlittle, vozduhopodajushchej, vozduhorazdelitelnoj and connecting tubes and scale. While the light source is in the form of polarization of the emitter, and the device is equipped with a recorder, analyzer and fiber-optic cable located between the radiation source and the con is coherent order. 4 Il.
The control device methane is intended for use in various industries, for example in the oil and gas industry for the analysis of gas content in the process of extraction and processing of natural gas and oil.
A device for automatic control of methane and other combustible gases. The device comprises a thermal bridge sensor, the diagonal of which is included amplifier, the output of the latter is connected to the rectifier bridge, the output of which through resistor connected analog device, showing the concentration of methane and the voltage Converter in the frequency control unit diagnostics, the comparator limit the concentration of methane, the unit audible alarm, a computation of the instantaneous gas concentration, the total concentration of gas and the correction values of the gas concentration readings, the unit's permanent memory, the block of non-volatile memory unit of the digital display, the modulator serial interface, block of digital information processing frequency detectors, block opto-isolation input circuits, at the input of which is connected to the frequency outputs of the sensors, vyhodilia computing, frequency generator with programmable frequency divider, the control inputs of which are connected to the outputs ports of the computation, the output of the generator through the demultiplexer is connected to the input of the opto-isolation output circuits, the outputs of the block are connected to frequency filters whose outputs are supplied through power network connected to the inputs of the sensors, the power supply unit, the first output AC voltage which is connected to a throttle filters, and the outputs of the filters are connected to the inputs of the sensors, the Executive unit and the unit sound signals, the inputs of which are connected to the output port of the block. The disadvantage of this device is the narrow limits of the performed measurements and frequency control of gases. (RF patent 2013565, E. 21 F 17/00, 1994.05.30).
Known mine interferometer CHI-7, adopted for the prototype. The interferometer consists of a metal casing of rectangular shape, with the outer side, it is placed: eyepiece fitting for attaching a rubber bulb, a distribution valve with adapter, cartridge with a lamp button to turn on the light source and the leash to move the interference pattern. Inside the housing is divided by partitions into three compartments: the first placement is ladybeetle maze which is a coil wound on the tube from PVC skin. Between the Chuck and the maze is fitting, closed with a rubber cap. This fitting is attached a rubber tube pears when filling air lines clean atmospheric air. Department with absorption cartridge is closed by a cover. In the third compartment of the casing is placed dry cell to power the bulb. One dry contact element is locked to the housing, and the other through an insulated contact is connected by wires to the power button. This compartment is closed by sliding cover. The disadvantage of this device is the frequency control, control of methane and carbon dioxide and the need for human presence in the measurement of gases in the mine atmosphere. (Zeisler p. P., S. I. I. Manual mine interferometers, M., Nedra, 1977, S. 49-50).
The technical result of the invention is to increase safety measurements for automating control of methane, the expansion of the scope due to the grading scale for measurement of the content of other gases.
The technical result is achieved in that the control device methane, soderjasimi and air cavities, gas and air cavities, prism, adoptada, goodlittle, vozduhopodajushchej, vozduhorazdelitelnoj and connecting tubes, scale, according to the invention the light source is in the form of polarization of the emitter, and the device is equipped with a recorder, analyzer and fiber-optic cable located between the radiation source and the condenser lens and the analyzer is installed in front of the scale and made in the form of two rows of lenses, arranged in a checkerboard pattern.
The application of the proposed device in comparison with the prototype allows to increase the security measurements for automating control of methane, to expand the scope of application due to the possibility of the grading scale for measurement of the content of other gases.
The control device methane is illustrated by drawings, where Fig.1 shows a gas circuit of Fig.2 shows the optical scheme of the device of Fig.3 shows the analyzer with lenses arranged in a checkerboard pattern, the section a-a of Fig.4 shows the device attached to the pipeline.
In the drawings presents: 1 - the polarization of the emitter, for example a laser; 2 - fiber optic cable; 3 - condenser lens; 4 - the first reflective mirror; 5 - rejected susna side cavity; 10 - gas passage; 11 - second reflective mirror; 12 - the third reflective mirror; 13 - analyzer; 14 - scale lenses; 15 - registering unit; 16 - gas supply tube; 17 - gasolinera tube; 18 - intake tube; 19 - vozduhorazdelitelnaja tube; 20 - connecting tube; 21 - two rows of lenses analyzer, arranged in a checkerboard pattern; the 22 - case; 23 - pipeline; 24 - choke.
The device is based on measuring the shift of the interference pattern occurring due to a change in the composition of the gas medium, which is in the path of one of the rays that are able to interfere. The offset is proportional to the difference between the indices of refraction of the investigated gas mixture and air.
The control device methane includes a housing 22, which houses the condenser lens 3, the optical fiber cable 2, the reflective mirror 4, 11, 12, the deflecting mirror 5, the housing 8 of the gas and air cavities, gas 10 and the air cavity 6,9, prism 7, the gas supply 16, vasodilatory 17, air supply 18, vozduhorazdelitelnaja 19 and the connecting tube 20, the polarization of the emitter 1, the analyzer 13, the scale 14, the evaluation unit 15, and the analyzer 13 content is as follows, for example, by equipping them with the pipeline (Fig.4).
Gas circuit device (Fig.1) consists of two hermetically separated from each other lines: gas and air. When determining the concentration of methane gas comes from a gas through the gas supply tube 16, then the gas enters the gas passage 10 of the body 8 of the air and gas chambers, where through vasodilatating tube 17 is returned to the pipeline. The air line is filled with clean air supplied through vozduhopodajushchej tube 18 passing through the first air cavity 6, then through the connecting tube 20 into the second air chamber 9 and out by vozduhorazdelitelnoj tube 19. The air serves as a basis for comparison of changes of the refractive index.
The optical scheme of the rays (Fig.2) the next. The light from the polarization of the emitter 1, such as a laser into a fiber optic cable 2 on the condenser lens 3 and is reflected from the upper silvered face of the first reflective mirror 4 parallel beam falls on the deflecting mirror 5, where the light beam is decomposed into two interfering beams. The first light beam reflected from the upper face of the deflecting mirror 5, passes through the first air side of the cavity 6 to the La 5, passes through the gas passage 10 of the body 8 of the air and gas chambers. Then both beams of light fall on the prism 7 and twice reflected from its Kaletnyk faces, turn 180° and pass through the second side air chamber 9 and through the gas passage 10.
Through the first 6 and second 9 air side of the cavity is continuously clean the air supplied through vozduhopodajushchej tube 18 passing through the connecting tube 20 and out through vozduhorazdelitelnoj tube 19.
Through the gas passage 10 is constantly passing gas from the pipeline 23 due to the pressure difference created by the orifice 24. The gas is fed into the gas passage 10 through the gas supply tube 16, and is removed by goodlittle tube 17.
Both beams of light coming from the camera are transferred to the second reflective mirror 11 and reflected from the upper and lower faces, get to the top they are vacuum face of the third reflective mirror 12, through which the rays are deflected and at right angles into the analyzer 13. Optical signals received by the analyzer 13 by means of two rows of lenses 21 of the analyzer 13, arranged in a checkerboard pattern (Fig.3) get on the scale 14, and the bar is continuously recorded registreren. For measurement of the content of other gases provides for calibration of the scale, which is necessary, is adjusted to the desired gas.
The use of the monitoring device of methane provides the following benefits: improved safety measurements; continuous automated control; expansion of the scope of this type of device by measuring the content of other gases; increasing the accuracy, efficiency and reliability of measurements; the possibility of using the inventive device during operation of pipelines for various purposes; remote reading of the signal from the device.
The control device of methane, comprising a housing holds the light source, condenser lens, a reflective mirror, the body of the gas and air cavities, gas and air cavities, lens, gas supply, goodlittle, vozduhopodajushchej, vozduhorazdelitelnoj and connecting tubes, scale, characterized in that the light source is in the form of polarization of the emitter, and the device is equipped with a recorder, analyzer and fiber-optic cable located between the source slouching in a checkerboard pattern.
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.