CN218956397U - Online detection device for coal spontaneous combustion index gas - Google Patents
Online detection device for coal spontaneous combustion index gas Download PDFInfo
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- CN218956397U CN218956397U CN202222854227.5U CN202222854227U CN218956397U CN 218956397 U CN218956397 U CN 218956397U CN 202222854227 U CN202222854227 U CN 202222854227U CN 218956397 U CN218956397 U CN 218956397U
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Abstract
The utility model relates to a coal spontaneous combustion index gas on-line detection device which comprises a multi-point sampler, a gas analyzer host, a second air pump, a first server and a power module, wherein the multi-point sampler comprises a beam tube sampling assembly, a first electromagnetic valve group and a first relay module; the gas analyzer main machine comprises a photoacoustic spectrum module, a sensor group, an air inlet pipeline, a first air extracting pump, a second electromagnetic valve group and a second relay module. According to the utility model, the sampling gas is transmitted to the gas analyzer host through the multipoint sampler and the second air pump, the spontaneous combustion index gas of various coals is detected through the photoacoustic spectrum module and the sensor group, and is converted into the gas concentration through the first server, so that the gas components in the goaf of the coal mine can be detected in real time, quickly and online, different sampling points in the goaf of the coal mine can be detected at the same time, the calibration period is long, the detection efficiency is high, the precision is high, effective guidance can be provided for nitrogen injection, the safety pre-warning of the coal mine is realized, and the safety of the coal mine is ensured.
Description
Technical Field
The utility model relates to the technical field of gas detection, in particular to a device for detecting coal spontaneous combustion index gas on line.
Background
In the mining process of the coal mine, holes or cavities are left after underground coal or gangue and the like are mined. The coal mine goaf is easy to generate spontaneous combustion phenomenon under the conditions of proper temperature, oxygen concentration and the like due to the existence of combustible matters such as residual coal and the like, thereby causing coal mine fire and bringing huge loss to the coal mine. Therefore, the detection of spontaneous combustion of goaf coal is particularly important. At present, the traditional spontaneous combustion detection of coal adopts a method of analyzing by a chromatographic mode after manual sampling, so that operation errors are easy to cause, the traditional chromatographic measurement technology needs periodic calibration every week, carrier gas is needed during measurement, the measurement precision is poor, and the safety of a coal mine cannot be ensured due to non-real-time detection. Therefore, development of a coal spontaneous combustion detection device capable of detecting the gas components in the goaf on line for a long time is needed to provide early warning for coal mine safety.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art, and provides the on-line detection device for the coal spontaneous combustion index gas, which can realize real-time, rapid and on-line detection of the gas components in the goaf of the coal mine, can detect different sampling points of a plurality of goafs at the same time, has high detection efficiency and high precision, realizes coal mine safety pre-warning, and ensures the safety of the coal mine.
The utility model adopts the following technical scheme:
an on-line detection device for coal spontaneous combustion index gas, comprising:
the multipoint sampler comprises a beam tube sampling assembly, a first electromagnetic valve group and a first relay module; the beam tube sampling assembly comprises a plurality of sampling beam tubes and is used for sampling gas at a plurality of sampling points; the first electromagnetic valve group comprises a plurality of sampling electromagnetic valves, and the sampling electromagnetic valves are connected with the sampling beam tubes and used for controlling the gas circuit on-off of the corresponding sampling beam tubes; the first relay module is connected with and controls the opening or closing of a plurality of sampling electromagnetic valves of the first electromagnetic valve group;
the gas analyzer main machine comprises a photoacoustic spectrum module, a sensor group, an air inlet pipeline, a first air suction pump, a second electromagnetic valve group and a second relay module; the photoacoustic spectrum module and the sensor group are used for detecting the concentration of various coal spontaneous combustion index gases; the air inlet pipeline is communicated with the multipath sampling beam tube, the photoacoustic spectrum module and the sensor group; the first air pump is used for pumping the sampling gas entering the air inlet pipeline to the photoacoustic spectroscopy module and the sensor group; the second electromagnetic valve group comprises a plurality of detection electromagnetic valves and is used for controlling the gas circuit on-off between the gas inlet pipeline and the photoacoustic spectrum module as well as between the gas circuit on-off between the gas inlet pipeline and the sensor group; the second relay module is connected with and controls the opening or closing of a plurality of detection electromagnetic valves of the second electromagnetic valve group;
the second air pump is used for pumping the gas from the sampling point to the air inlet pipeline through the sampling beam tube;
the first server is in communication connection with the photoacoustic spectrum module and the sensor group and is at least used for collecting output signals of the photoacoustic spectrum module and the sensor group and converting the output signals into concentrations of corresponding index gases; the first server is connected with and controls the first air pump and the second air pump;
and the power supply module is at least used for supplying power to the first air pump, the second air pump, the photoacoustic spectrum module and the sensor group.
Further, the sensor group comprises an oxygen sensor and H 2 Sensor, H 2 And one or more of an S sensor and a humidity sensor.
Further, the photoacoustic spectroscopy module is configured for measuring H 2 O、CO、CO 2 、CH 4 、C 2 H 6 、C 2 H 4 、C 2 H 2 、SO 2 、NH 3 The concentration of one or more gases.
Further, the gas analyzer mainframe further comprises a pressure sensor and/or a temperature sensor; the pressure sensor is connected with the air inlet pipeline and used for detecting the pressure of air in the air inlet pipeline; the temperature sensor is connected with the air inlet pipeline and used for detecting the temperature of the air in the air inlet pipeline.
Further, the gas analyzer host also comprises a signal input interface and a signal output interface; the signal input interface is in communication connection with the second relay module and is used for connecting the first server to receive the control signal output by the first server; the signal output interface is in communication connection with the photoacoustic spectrum module and the sensor group and is used for connecting the first server to input detection signals of the photoacoustic spectrum module and the sensor group into the first server.
Further, the on-line detection device for the coal spontaneous combustion index gas further comprises a second server, the second server is in communication connection with the first server, the first server is in communication connection with the first relay module and the second relay module, and the on-line detection device is used for transmitting control instructions output by the second server to the first relay module and the second relay module and outputting concentration data of the index gas to the second server.
Further, the air inlet pipeline comprises an air inlet main pipeline and an air inlet branch pipeline, and the second electromagnetic valve group comprises a two-position three-way electromagnetic valve and a two-position two-way electromagnetic valve; the two-position three-way electromagnetic valve is respectively communicated with the air inlet main path, the air inlet branch path and the second air pump; the two-position two-way electromagnetic valve is arranged on the air inlet branch and used for controlling the on-off of an air path between the air inlet main path and the photoacoustic spectrum module as well as between the air inlet main path and the sensor group, and the first air pump is arranged on the air inlet branch.
Further, the front ends of the multipath sampling beam tubes of the beam tube sampling assembly are respectively connected with a filtering device, the filtering device comprises a water filter and a dust filter, and sampling point gas enters the sampling beam tubes through the dust filter and the water filter.
Further, the multipoint sampler, the gas analyzer host, the first server and the power module comprise explosion-proof boxes and are respectively arranged in the explosion-proof boxes.
Further, the on-line detection device for the coal spontaneous combustion index gas further comprises a cabinet, the multipoint sampler, the gas analyzer host, the first server and the power supply module are all arranged in the cabinet, and the second air pump is arranged outside the cabinet.
As can be seen from the above description of the present utility model, compared with the prior art, the present utility model has the following beneficial effects:
according to the on-line detection device for the spontaneous combustion index gas of the coal, the sampling gas is transmitted to the gas analyzer host through the multipoint sampler and the second air pump, and various spontaneous combustion index gases of the coal are detected through the photoacoustic spectrum module and the sensor group, so that the gas components in the goaf of the coal mine can be detected rapidly and on line in real time, different sampling points in the goaf of the coal mine can be detected simultaneously, the on-line detection device has a calibration period of up to two years, the detection efficiency is high, the accuracy is high, effective guidance can be provided for nitrogen injection, the safety pre-warning of the coal mine is realized, and the safety of the coal mine is ensured.
Drawings
FIG. 1 is a perspective view of an on-line detection device for coal spontaneous combustion index gas according to embodiment 1 of the present utility model;
fig. 2 is a perspective view of a multipoint sampler according to embodiment 1 of the present utility model;
FIG. 3 is a perspective view of a gas analyzer mainframe of embodiment 1 of the present utility model;
FIG. 4 is a perspective view showing the internal structure of a gas analyzer body according to embodiment 1 of the present utility model;
FIG. 5 is a system block diagram of an on-line detection device for coal spontaneous combustion index gas according to embodiment 1 of the present utility model;
fig. 6 is a gas circuit diagram of the coal spontaneous combustion index gas on-line detecting apparatus of embodiment 1 of the present utility model.
In the figure: the system comprises a cabinet, a multi-point sampler, a first relay module, a sampling beam tube, a sampling electromagnetic valve, a gas analyzer host, a photoacoustic spectrum module, a gas inlet pipeline, a gas inlet main circuit, a gas inlet branch circuit, a first air pump, a second relay module, a pressure sensor, a temperature sensor, an oxygen sensor, a humidity sensor, a sensor module, a two-position three-way electromagnetic valve, a two-position two-way electromagnetic valve, a first server, a power supply module, a second air pump, a 7 explosion-proof box, a second server, a network port conversion optical fiber module and a network port conversion module, and a 10.485.
Detailed Description
The utility model is further described below by means of specific embodiments.
Example 1
Referring to fig. 1, the on-line detection device for coal spontaneous combustion index gas of the present utility model includes a cabinet 1, a multipoint sampler 2, a gas analyzer host 3, a first server 4 and a power module 5 which are disposed in the cabinet 1, and a second air pump 6 which is disposed outside the cabinet 1. The multipoint sampler 2, the gas analyzer mainframe 3, the first server 4 and the power module 5 all comprise an explosion-proof box 7 and are respectively arranged in the explosion-proof box 7.
Referring to fig. 2, the multipoint sampler 2 includes a beam tube sampling assembly, a first electromagnetic valve group and a first relay module 21; the beam tube sampling assembly comprises a multi-path sampling beam tube 22 for multi-sampling point gas sampling; the first electromagnetic valve group comprises a plurality of sampling electromagnetic valves 23, and the sampling electromagnetic valves 23 are connected with the sampling beam tubes 22 and used for controlling the on-off of gas paths of the corresponding sampling beam tubes 22; the first relay module 21 is connected to and controls the opening or closing of a plurality of sampling solenoid valves 23 of the first solenoid valve group. The front ends of the multipath sampling beam tubes 22 of the beam tube sampling assembly are respectively connected with a filtering device, the filtering device comprises a water filter 24 and a dust filter 25, and sampling point gas enters the sampling beam tubes 22 through the dust filter 25 and the water filter 24. The first solenoid valve group and the first relay module 21 are both intrinsically safe. In this embodiment, the beam tube sampling assembly includes 30 paths of beam tubes.
Referring to fig. 3 to 6, the gas analyzer main body 3 includes a photoacoustic spectroscopy module 31, a sensor group, an air intake pipe 32, a first air pump 33, a second electromagnetic valve group, a second relay module 34, a pressure sensor 35, a temperature sensor 36, a signal input interface, and a signal output interface.
The photoacoustic spectrum module 31 and the sensor group are used for detecting the concentration of various coal spontaneous combustion index gases; the air inlet pipeline 32 is communicated with the multi-path sampling beam tube 22, the photoacoustic spectrum module 31 and a sensor group; the first air pump 33 is configured to pump the sampled gas entering the air inlet pipe 32 to the photoacoustic spectroscopy module 31 and the sensor group. The pressure sensor 35 is connected with the air inlet pipeline 32 and is used for detecting the pressure of the air in the air inlet pipeline 32; the temperature sensor 36 is connected to the intake pipe 32 for detecting the temperature of the gas in the intake pipe 32. In this embodiment, the photoacoustic spectroscopy module 31 and the sensor group operate independently of each other. The photoacoustic spectroscopy module 31 is configured for measuring H 2 O、CO、CO 2 、CH 4 、C 2 H 6 、C 2 H 4 、C 2 H 2 、SO 2 、NH 3 These are several gas concentrations. The sensor group includes an oxygen sensor 37, H 2 Sensor, H 2 S sensor and humidity sensor 38 for measuring O 2 、H 2 、H 2 S、H 2 O concentration, where H 2 Sensor and H 2 The S sensor is configured as an integrated sensor module 39. The photoacoustic spectrum module 31 adopts the prior art, and is of intrinsic safety type, and the model is DKG-ONE. The photoacoustic spectroscopy technology is based on the photoacoustic effect, when an infrared light source passes through a specific narrow-band filter, characteristic light of a gas absorption spectrum is generated, the characteristic light is injected into a photoacoustic gas cell, and thermal expansion is generated after the characteristic light is absorbed by detected gas; the regular thermal expansion in the sealed photoacoustic gas cell generates sound signals when the incident light frequency is regularly modulated, and the strength of the sound signals is obtained through the microphone, so that the concentration value of the measured gas can be obtained.
A second pump 6 for pumping gas from the sampling point through the sampling beam tube 22 to the inlet line 32. The second air pump 6 adopts a coal-mine vacuum pump, in particular a 660V water ring pump, is directly powered by a down-hole transformer, has an air extraction distance of 8000 meters, and can effectively pump sampling point gases of different goafs to the vicinity of the gas analyzer host computer 3.
The air inlet pipeline 32 comprises an air inlet main pipeline 321 and an air inlet branch pipeline 322, and the second electromagnetic valve group comprises two detection electromagnetic valves and is used for controlling the on-off of an air path between the air inlet pipeline 32 and the photoacoustic spectrum module 31 as well as between the air inlet pipeline 32 and the sensor group; specifically comprises a two-position three-way electromagnetic valve 310 and a two-position two-way electromagnetic valve 311; the two-position three-way electromagnetic valve 310 is respectively communicated with the air inlet main path 321, the air inlet branch path 322 and the second air pump 6; the two-position two-way electromagnetic valve 311 is disposed on the air inlet branch 322 and is used for controlling the on-off of the air path between the air inlet main path 311, the photoacoustic spectroscopy module 31 and the sensor group, and the first air pump 33 is disposed on the air inlet branch 322. The second relay module 34 is connected to and controls the opening or closing of the two-position three-way electromagnetic valve 310 and the two-position two-way electromagnetic valve 311 of the second electromagnetic valve group. In this embodiment, the first pump 33 is a 1L vacuum pump.
The first server 4 is in communication connection with the photoacoustic spectrum module 31 and the sensor group, and is internally provided with coal spontaneous combustion detection device software, and is used for collecting output signals of the photoacoustic spectrum module 31 and the sensor group and converting the output signals into concentrations of corresponding index gases. The software of the coal spontaneous combustion detection device adopts the prior art. Is arranged underground and can be directly powered by 127V underground.
The system also comprises a second server 8, and the second server 8 is also connected with a display and a printer. The second server 8 is communicatively connected to the first server 4. The first server 4 is communicatively connected to the first relay module 21 and the second relay module 34, and is configured to transmit a control instruction output by the second server 8 to the first relay module 21 and the second relay module 34, and output concentration data of the index gas to the second server 4. The first server 4 is connected with and controls the first air pump 33, and the second air pump 6 is connected with and controls the second air pump through an air-break contactor.
The signal input interface is in communication connection with the second relay module 34 through the network port-to-optical fiber module 9 and is used for connecting the first server 4 to receive the control signal output by the first server 4; the signal output interface is in communication connection with the photoacoustic spectrum module 31 and the sensor group through the 485 network port conversion module 10 and is used for connecting the first server 4 to input detection signals of the photoacoustic spectrum module 31 and the sensor group into the first server 4. The signal input interface and the signal output interface are both configured as network ports.
The power module 5 is configured as an electrical control box, and is internally provided with an intrinsic safety type switching power supply, and is used for converting 127V alternating current into 12V direct current and 24V direct current to supply power for the first air pump 33, the second air pump 6, the photoacoustic spectrum module 31 and the sensor group.
The working principle of the on-line detection device for the coal spontaneous combustion index gas of the utility model is as follows: the first server 4 receives the control instruction issued by the second server 8, and controls the opening or closing of each sampling electromagnetic valve 22 in the multipoint sampler 2 through the first relay module 21 so as to realize the sampling of gases at different sampling points; the second relay module 34 controls the two-position three-way electromagnetic valve 311 and the two-position two-way electromagnetic valve 310 to be opened or closed, and the first air pump 33 and the second air pump 6 to be opened or closed, so that the sampled gas in the air inlet pipeline 32 is pumped into the photoacoustic spectrum module 31 and the sensor group to detect the corresponding index gas, the detection signals of the photoacoustic spectrum module 31 and the sensor group are output to the first server 4, the first server 4 converts the output signals into the concentration of the corresponding index gas, and the gas components of each sampling point of the coal mine goaf are obtained for coal mine safety pre-warning and reference.
Example 2
This embodiment differs from embodiment 1 in that: the beam tube sampling assembly comprises 60 paths of beam tubes; the signal input interface and the signal output interface are configured as serial ports.
The foregoing is only two specific embodiments of the present utility model, but the design concept of the present utility model is not limited thereto, and any insubstantial modification of the present utility model by using the concept should be construed as infringement of the protection scope of the present utility model.
Claims (10)
1. An on-line detection device for coal spontaneous combustion index gas, which is characterized by comprising:
the multipoint sampler comprises a beam tube sampling assembly, a first electromagnetic valve group and a first relay module; the beam tube sampling assembly comprises a plurality of sampling beam tubes and is used for sampling gas at a plurality of sampling points; the first electromagnetic valve group comprises a plurality of sampling electromagnetic valves, and the sampling electromagnetic valves are connected with the sampling beam tubes and used for controlling the gas circuit on-off of the corresponding sampling beam tubes; the first relay module is connected with and controls the opening or closing of a plurality of sampling electromagnetic valves of the first electromagnetic valve group;
the gas analyzer main machine comprises a photoacoustic spectrum module, a sensor group, an air inlet pipeline, a first air suction pump, a second electromagnetic valve group and a second relay module; the photoacoustic spectrum module and the sensor group are used for detecting the concentration of various coal spontaneous combustion index gases; the air inlet pipeline is communicated with the multipath sampling beam tube, the photoacoustic spectrum module and the sensor group; the first air pump is used for pumping the sampling gas entering the air inlet pipeline to the photoacoustic spectroscopy module and the sensor group; the second electromagnetic valve group comprises a plurality of detection electromagnetic valves and is used for controlling the gas circuit on-off between the gas inlet pipeline and the photoacoustic spectrum module as well as between the gas circuit on-off between the gas inlet pipeline and the sensor group; the second relay module is connected with and controls the opening or closing of a plurality of detection electromagnetic valves of the second electromagnetic valve group;
the second air pump is used for pumping the gas from the sampling point to the air inlet pipeline through the sampling beam tube;
the first server is in communication connection with the photoacoustic spectrum module and the sensor group and is at least used for collecting output signals of the photoacoustic spectrum module and the sensor group and converting the output signals into concentrations of corresponding index gases; the first server is connected with and controls the first air pump and the second air pump;
and the power supply module is at least used for supplying power to the first air pump, the second air pump, the photoacoustic spectrum module and the sensor group.
2. The on-line detection device for coal spontaneous combustion index gas according to claim 1, wherein the sensor group comprises an oxygen sensor and H 2 Sensor, H 2 And one or more of an S sensor and a humidity sensor.
3. The online detection device for coal spontaneous combustion index gas according to claim 1, wherein the photoacoustic spectroscopy module is configured to measure H 2 O、CO、CO 2 、CH 4 、C 2 H 6 、C 2 H 4 、C 2 H 2 、SO 2 、NH 3 The concentration of one or more gases.
4. The on-line detection device for coal spontaneous combustion index gas according to claim 1, wherein the gas analyzer main body further comprises a pressure sensor and/or a temperature sensor; the pressure sensor is connected with the air inlet pipeline and used for detecting the pressure of air in the air inlet pipeline; the temperature sensor is connected with the air inlet pipeline and used for detecting the temperature of the air in the air inlet pipeline.
5. The on-line detection device for coal spontaneous combustion index gas according to claim 1, wherein the gas analyzer main machine further comprises a signal input interface and a signal output interface; the signal input interface is in communication connection with the second relay module and is used for connecting the first server to receive the control signal output by the first server; the signal output interface is in communication connection with the photoacoustic spectrum module and the sensor group and is used for connecting the first server to input detection signals of the photoacoustic spectrum module and the sensor group into the first server.
6. The on-line detection device for spontaneous combustion index gas of coal as claimed in claim 1 or 5, further comprising a second server, wherein the second server is in communication connection with the first server, and the first server is in communication connection with the first and second relay modules, and is used for transmitting control instructions output by the second server to the first and second relay modules and outputting concentration data of the index gas to the second server.
7. The on-line detection device for coal spontaneous combustion index gas according to claim 1, wherein the air inlet pipeline comprises an air inlet main pipeline and an air inlet branch pipeline, and the second electromagnetic valve group comprises a two-position three-way electromagnetic valve and a two-position two-way electromagnetic valve; the two-position three-way electromagnetic valve is respectively communicated with the air inlet main path, the air inlet branch path and the second air pump; the two-position two-way electromagnetic valve is arranged on the air inlet branch and used for controlling the on-off of an air path between the air inlet main path and the photoacoustic spectrum module as well as between the air inlet main path and the sensor group, and the first air pump is arranged on the air inlet branch.
8. The on-line detection device for coal spontaneous combustion index gas according to claim 1, wherein the front ends of the multi-path sampling beam tubes of the beam tube sampling assembly are respectively connected with a filtering device, the filtering device comprises a water filter and a dust filter, and the sampling point gas enters the sampling beam tubes through the dust filter and the water filter.
9. The on-line detection device for coal spontaneous combustion index gas according to claim 1, wherein the multipoint sampler, the gas analyzer main machine, the first server and the power supply module all comprise explosion-proof boxes and are respectively arranged in the explosion-proof boxes.
10. The on-line detection device for spontaneous combustion index gas of coal according to claim 1 or 9, further comprising a cabinet, wherein the multipoint sampler, the gas analyzer host, the first server and the power module are all disposed in the cabinet, and the second air pump is disposed outside the cabinet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222854227.5U CN218956397U (en) | 2022-10-25 | 2022-10-25 | Online detection device for coal spontaneous combustion index gas |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222854227.5U CN218956397U (en) | 2022-10-25 | 2022-10-25 | Online detection device for coal spontaneous combustion index gas |
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| CN218956397U true CN218956397U (en) | 2023-05-02 |
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| CN202222854227.5U Active CN218956397U (en) | 2022-10-25 | 2022-10-25 | Online detection device for coal spontaneous combustion index gas |
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- 2022-10-25 CN CN202222854227.5U patent/CN218956397U/en active Active
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