CN210863529U - Gas concentration measuring device for laser drilling coal rock production - Google Patents
Gas concentration measuring device for laser drilling coal rock production Download PDFInfo
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- CN210863529U CN210863529U CN201921221617.0U CN201921221617U CN210863529U CN 210863529 U CN210863529 U CN 210863529U CN 201921221617 U CN201921221617 U CN 201921221617U CN 210863529 U CN210863529 U CN 210863529U
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Abstract
The utility model discloses a gas concentration measuring device that laser drilling coal petrography produced, including measuring room, first laser emission unit, second laser emission unit, laser receiving unit, data acquisition system and direction guiding mechanism, the inside cavity of measuring room, first laser emission unit with laser receiving unit sets up respectively the left side and the right side of measuring room, data acquisition system with laser emission unit connects, first laser emission unit is used for transmitting laser, laser receiving unit is used for receiving laser to trun into the light signal for signal of telecommunication send give data acquisition system handles, the transmitting terminal of first laser emission unit with laser receiving unit's receiving terminal is located same straight line.
Description
Technical Field
The utility model relates to a gas concentration field for measuring laser and creep into the coal petrography and produce especially relates to a gas concentration measurement device that laser creeps into coal petrography and produces.
Background
During the laser drilling process of coal rock, gases such as hydrogen sulfide, carbon monoxide, carbon dioxide, sulfur dioxide, nitric oxide, nitrogen dioxide and the like can be generated. All of these gases can pollute the environment, and some of the gases can even harm human health. Therefore, the types and the concentrations of the gases generated in the laser drilling coal rock test are measured, and the necessary safety protection measures and the treatment of harmful waste gases in the actual engineering application are conveniently explored. In the existing equipment for detecting gas concentration, gas to be detected needs to be collected firstly and then sent into the equipment to be detected for detecting gas components and concentration, however, after the gas is collected, the environment of the gas changes, the detection result of the gas can be directly influenced, and the detection precision of the gas concentration is reduced.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a gas concentration measuring device that laser drilling coal petrography produced.
The utility model provides a gas concentration measuring device that laser drilling coal petrography produced, including measuring chamber, first laser emission unit, second laser emission unit, laser receiving element, data acquisition system and direction guiding mechanism, the inside cavity of measuring chamber is placed the coal petrography that awaits measuring in it, first laser emission unit with the laser receiving element is connected respectively in the left side and the right side of measuring chamber, data acquisition system is connected with the laser receiving element, first laser emission unit is to the indoor transmission incident laser of measuring, the laser receiving element receives the laser that first laser emission unit transmitted to convert the light signal into the signal of telecommunication and send to the data acquisition system handles, the transmitting terminal of first laser emission unit with the receiving terminal of laser receiving element is located same straight line, the upper end of measuring chamber is equipped with the second through-hole rather than inside intercommunication, second through-hole department is equipped with sealing unit, sealing unit is used for hiding the second through-hole, second laser emission unit sets up in the sealing unit, and with sealing unit fixed connection, the laser emission end orientation of second laser emission unit the second through-hole sets up, second laser emission unit shines the coal petrography that awaits measuring, direction adjustment mechanism with second laser emission unit transmission is connected, and it can drive second laser emission unit is along X axle, Y axle and Z axle motion respectively.
Furthermore, the data acquisition system comprises a data acquisition card and a processing terminal, the data acquisition card is respectively connected with the laser receiving unit and the processing terminal, and the data acquisition card is used for acquiring the electric signals sent by the laser receiving unit, converting the acquired electric signals into digital signals and transmitting the digital signals to the processing terminal for processing.
Further, the first laser emission unit with the laser receiving unit all through a level set up the pipeline with measuring chamber fixed connection, every all be equipped with the purge gas pipeline of its inside intercommunication on the pipeline, the external air pump of purge gas pipeline or gaseous collection device, the pipeline is close to the one end of measuring the chamber is equipped with the ball valve.
Further, the pipeline includes first body and second body, wherein, first body level sets up the left side or the right side of measuring chamber, its be close to the one end of measuring chamber with the measuring chamber is connected, and with the inside intercommunication of measuring chamber, its other end passes through flange and level setting the one end of second body is connected and the intercommunication, the other end of second body is equipped with first laser emission unit or laser receiving unit, be equipped with on the second body rather than inside intercommunication the purge gas pipeline, the purge gas pipeline is used for external air pump or gas collection device, be equipped with on the first body the ball valve.
Further, the first laser emitting unit is a distributed feedback semiconductor laser, and the laser receiving unit is a photodetector.
The utility model provides a beneficial effect that technical scheme brought is: a gas concentration measuring device that laser creeps into coal petrography and produces has following advantage:
(1) the utility model provides a device which can detect the gas components and the concentration generated by coal rocks in real time, saves the collection process of the gas to be detected, can directly detect the gas, and has the advantages of convenient operation, simplified gas detection steps and the like;
(2) the gas concentration measuring device of the utility model can detect the components and the concentration of the generated gas with higher response speed and higher measuring precision, can obviously shorten the period of gas detection, and has the advantages of high detection speed, high detection efficiency and the like;
(3) the gas concentration measuring device of the utility model also has the advantages of small error of the detection result, high accuracy and the like;
(4) gaseous concentration measurement device, safety ring protects, the gas tightness of device is stronger, can effectively avoid gaseous revealing polluted environment, and gas collection can in time control the harmful gas emission that the experiment produced, the feature of environmental protection is strong.
Drawings
Fig. 1 is a schematic structural diagram of a gas concentration measuring device produced by laser drilling of coal rocks according to the present invention;
fig. 2 is a flow chart of a method for measuring the concentration of gas generated by laser drilling of coal rocks according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be further described below with reference to the accompanying drawings.
Referring to fig. 1, an embodiment of the present invention provides a gas concentration measuring device for laser drilling of coal rock, which mainly includes a measuring chamber 10, a first laser emitting unit 63, a laser receiving unit 64, a second laser emitting unit 20, a sealing unit 30, and a direction adjusting mechanism (not shown in the figure), wherein the measuring chamber 10 is a rectangular structure with a hollow interior, and is horizontally disposed on an operation table (not shown in the figure), the left side and the right side of the measuring chamber 10 are both provided with a first through hole (not shown in the figure) communicated with the interior thereof, the centers of the two first through holes are located on the same straight line, each through hole is horizontally provided with a pipe 50, one end of each pipe 50 is communicated with the corresponding first through hole, the first laser emitting unit 63 is disposed at the other end of the pipe 50 located at the left side of the measuring chamber 10, the laser emitting end of the laser emitting unit faces the corresponding pipe 50, the laser receiving unit 64 is arranged at the other end of the pipe 50 at the right side of the measuring chamber 10, and the detection end of the laser receiving unit faces the corresponding pipe 50, wherein the first laser emitting unit 63 is used for emitting laser, the laser receiving unit 64 is used for detecting the wavelength of the incident laser, the middle part of the upper end of the measuring chamber 10 is provided with a second through hole (not shown) communicated with the inside thereof, the sealing unit 30 is vertically arranged at the middle part of the upper end of the measuring chamber 10, the lower end of the sealing unit is fixedly connected with the upper end of the measuring chamber 10, the sealing unit 30 is used for covering the second through hole so as to form a closed space in the measuring chamber 10, and the second laser emitting unit 20 is vertically arranged in the sealing unit 30 and is fixedly connected with the sealing unit 30, the laser emission end of the second laser emission unit 20 is arranged downwards, the lower end of the second laser emission unit passes through the second through hole and extends into the measuring chamber 10, the upper end of the second laser emission unit passes through the top of the sealing unit 30 and is in transmission connection with a direction adjusting mechanism arranged on the operating platform, and the direction adjusting mechanism can drive the laser emission end of the second laser emission unit 20 to move along the X axis, the Y axis and the Z axis respectively.
The utility model discloses in, first laser emission unit 63 is distribution feedback type semiconductor laser, its model number is NLK1B5C1TA, it is installed at the other end (being the left end) that is located the left pipeline 50 of measuring room 10 through first casing 60 screw thread, first casing 60 is the rectangle structure of vertical setting, distribution feedback type semiconductor laser sets up in first casing 60, the right side of first casing 60 is opened there is the screw hole that matches with pipeline 50, the other end (being the left end) of pipeline 50 is equipped with the external screw thread that matches with screw hole on first casing 60, first casing 60 screw thread is installed on corresponding pipeline 50, distribution feedback type semiconductor laser's laser emission end sets up towards corresponding pipeline 50; the detection unit is a photoelectric detector, the model number of which is PD-12D, the photoelectric detector is installed at the other end (namely the right end) of the pipeline 50 located on the right side of the measuring chamber 10 through the second shell 61, the second shell 61 is a vertically arranged rectangular structure, the photoelectric detector is arranged in the second shell 61, the left side of the second shell 61 is provided with a threaded hole matched with the corresponding pipeline 50, the other end (namely the right end) of the corresponding pipeline 50 is provided with an external thread matched with the thread on the second shell 61, the second shell 61 is installed on the corresponding switch through the thread, and the detection end of the photoelectric detector faces the corresponding pipeline 50 to be used for detecting the wavelength of laser light emitted by the distributed feedback semiconductor laser. For the installation positions of the distributed feedback type semiconductor laser and the photoelectric detector, the coaxiality of the incident end of the distributed feedback type semiconductor laser and the receiving end of the photoelectric detector is required to be ensured, the angle of the detection end of the photoelectric detector deviating from the laser light axis is ensured not to be larger than 2 degrees, and the incident laser emitted by the distributed feedback type semiconductor laser can be detected by the photoelectric detector to the maximum extent after penetrating through the measured gas. The first casing 60 and the second casing 61 are fixed to the upper end of the operation table by brackets, and the measuring chamber 10 is made of a high-temperature-resistant material, preferably, a high-temperature-resistant glass material. The second laser emitting unit 20 is a laser emitting head with a model bt240, and is vertically arranged in the sealing unit 30, and the sealing unit 30 is an organ shield with a longitudinal section of a conical structure. It should be noted that the operation table in the above embodiment is not the structure to be protected by the present invention, and its main function is to be a platform to facilitate the operation of the measuring chamber 10, the first laser emitting unit 63, the laser receiving unit 64 and the two pipes 50, which may be a working platform in the prior art or a flat ground.
A gas concentration measuring device that laser creeps into coal petrography and produces, based on TDLAS measuring gas composition's method, coal petrography is placed and is being putIn the measuring chamber 10, the second laser emitting unit 20 is started, and CO generated after the laser drilling into the coal rock2、NO、H2S four gases, a first laser emission unit 63 and a laser receiving unit 64 are simultaneously started, the first laser emission unit 63 emits laser and enters a chamber to be detected through a corresponding pipeline 50, when incident light passes through the gas to be detected, the gas can absorb the energy of incident light photons, the laser receiving unit 64 detects the change of the attenuation degree of the incident light after being absorbed by the gas, the concentration of the gas can be measured, and the wavelength of near-infrared laser incident from the first laser emission unit 63 is changed, so that CO and CO generated by laser drilling coal rock can be respectively measured2、NO、H2And S, four gas concentrations. The direction adjusting mechanism can be used for driving the laser emitting end of the second laser emitting unit 20 to move along the X axis, the Y axis and the Z axis, so that the laser emitted from the second laser emitting unit 20 can carry out drilling tests on all positions of the coal rock to be tested, and the position of the laser drilling on the coal rock to be tested can be adjusted.
In the above embodiment, the data processing system further includes a data acquisition card (not shown in the figure) and the processing terminal 40, the data acquisition card is respectively connected to the laser receiving unit 64 and the processing terminal 40, the laser receiving unit 64 converts the detected optical signal into an electrical signal, and the electrical signal is acquired by the data acquisition card and converted into a digital signal, which is input to the processing terminal 40, and the processing terminal 40 processes the acquired digital signal to obtain the detection result of the gas composition and the concentration. The processing terminal 40 is a computer, and the data acquisition card AMPCI type bus acquisition board is connected with the computer through a USB.
In the above embodiment, the direction adjustment mechanism includes an X-axis linear motion unit, a Y-axis linear motion unit, and a Z-axis linear motion unit, the X-axis linear motion unit is arranged on the operating platform, the Y-axis linear motion unit is arranged on the X-axis linear motion unit, and is in transmission connection with the X-axis linear motion unit, the X-axis linear motion unit drives the Y-axis linear motion unit to move along the X-axis direction, the Z-axis linear motion unit is arranged on the Y-axis linear motion unit, and is in transmission connection with the Y-axis linear motion unit, the Y-axis linear motion unit drives the Z-axis linear motion unit to move along the Y-axis direction, the second laser emitting unit 20 penetrates through the top end of the sealing unit 30 and is fixedly connected with the Z-axis linear motion unit, and the Z-axis linear motion unit can drive the second laser emitting unit 20 to move along the Z-axis direction.
It should be noted that in the utility model discloses in, X axle linear motion unit, the structure of Y axle linear motion unit and Z axle linear motion unit is not the utility model discloses the content that will protect, and X axle linear motion unit, Y axle linear motion unit and Z axle linear motion unit are prior art, can realize among the prior art the utility model discloses well X axle linear motion unit, the structure of Y axle linear motion unit and Z axle linear motion unit function all can regard as the utility model discloses well X axle linear motion unit, the specific embodiment of Y axle linear motion unit and Z axle linear motion unit, like the sharp module, consequently, the utility model discloses no longer give unnecessary details to X axle linear motion unit here, the specific structure and the theory of operation of Y axle linear motion unit and Z axle linear motion unit go on.
In the above embodiment, each of the pipes 50 is provided with a ball valve 52 and a purge gas pipe 51 communicated with the inside thereof, the ball valve 52 and the purge gas pipe 51 are provided independently, and the purge gas pipe 51 is externally connected with a gas pump (not shown) or a gas collecting device (not shown).
In the above embodiment, the pipeline 50 includes a first pipe 53 and a second pipe 54, the first pipe 53 and the second pipe 54 are both horizontally disposed, wherein one end of the first pipe 53 is fixedly connected to the first through hole of the measuring chamber 10, the other end of the first pipe is connected to one end of the second pipe 54 through a flange 55, the other end of the second pipe 54 is connected to the first casing 60 or the second casing 61 by a thread, a purge gas port communicating with the inside of the second pipe 54 is disposed on the second pipe 54, a purge gas pipeline 51 is disposed at the purge gas port, the purge gas pipeline 51 is used for externally connecting an air pump, and a ball valve 52 is disposed on the first pipe 53.
The utility model discloses in, be nitrogen gas in the air pump, the air pump is gaseous to pipeline 50 internal input nitrogen gas, on the one hand in order to be used for detection device's gas tightness, and on the other hand is used for cleaing away the impure gas in the pipeline 50, guarantees that there is not relevant gaseous interference in the device, influences the accuracy of testing result. Here, it should be noted that the two purge gas pipes 51 mainly function to perform airtightness detection of the apparatus and to remove impurity gases from the apparatus, and during the detection of gas components and concentration, the two purge gas pipes 51 are closed to maintain the apparatus in a sealed state. And to the implementation method that the purge gas pipeline 51 is closed, the utility model discloses do not do strict restriction, as long as can realize that the purge gas pipeline 51 is in the closed condition. In addition, after the detection is finished, the waste gas generated in the device is collected by the gas collecting device in a centralized way so as to prevent the gas from leaking out and polluting the environment. For the structure of the gas collecting device, the utility model is not limited to this, as long as the function of collecting and processing the gas can be realized; the first pipe 53 and the second pipe 54 are connected by the flange 55, which facilitates the detachment of the second pipe 54 and the corresponding first laser emitting unit 63 or laser receiving unit 64.
As shown in fig. 2, a method for measuring gas concentration by using the gas concentration measuring device produced by laser drilling of coal rock mainly comprises the following steps:
s1, laser drilling coal rock test: the laser head is driven by the direction adjusting mechanism to move above the test coal rock, the second laser emitting unit is opened, and the test coal rock is irradiated so that the laser drills into the test coal rock and generates gas; then, driving a second laser device to move through a direction adjusting mechanism so as to finish the laser drilling coal rock test on each position of the test coal rock; before performing S1, the method further includes:
s01, checking the airtightness of the device: putting the coal rock to be detected into a measuring chamber, opening ball valves on two pipelines, closing a purge gas pipeline of one pipeline, externally connecting a gas pump on the purge gas pipeline of the other pipeline, opening the gas pump, and delivering gas into the pipelines to check the gas tightness of each part of the device;
s02, purging of impurity gases in the pipeline and the measuring chamber: purging of impurity gases in pipelines and measurement chambers: and maintaining the opening state of the ball valves on the two pipelines, opening the purging gas pipeline in the closing state, continuously introducing gas into the pipelines and the measuring chamber until impurity gases in the pipelines and the measuring chamber are all discharged, and closing the gas pump and the purging gas pipelines on the two pipelines.
S2, detecting gas concentration: respectively opening a first laser transmitting unit and a laser receiving unit, wherein the first laser transmitting unit transmits laser, the laser enters a measuring chamber through a pipeline and penetrates through gas, the laser receiving unit receives optical signals and transmits the received optical signals to a data acquisition system, the wavelength of the laser transmitted by the first laser transmitting unit is adjusted so as to complete the detection of the components and the concentration of various gases in the measuring chamber, and the data acquisition system processes various electric signals so as to respectively obtain the component and concentration detection results of various gases;
after the detection is finished, waste gas in the device needs to be collected, and the method mainly comprises the following steps: after the detection is finished, the ball valves on the two pipelines are respectively closed, after the gas temperatures in the chamber to be measured and the pipelines are cooled, the ball valve and the air sweeping and blowing pipeline on each pipeline are respectively opened, the air pump is connected to the air sweeping and blowing pipeline of one pipeline, the gas collecting device is connected to the air sweeping and blowing pipeline of the other pipeline, the air pump is started, gas is introduced, the gas in the measuring chamber and the pipelines is discharged to the gas collecting device, and the gas is collected by the gas collecting device so as to prevent the waste gas generated in the test from polluting the environment.
In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The features of the embodiments and embodiments described herein above may be combined with each other without conflict.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (5)
1. The gas concentration measuring device is characterized by comprising a measuring chamber (10), a first laser emitting unit (63), a second laser emitting unit (20), a laser receiving unit (64), a data acquisition system and a direction adjusting mechanism, wherein the measuring chamber (10) is hollow, coal rocks to be measured are placed in the measuring chamber (10), the first laser emitting unit (63) and the laser receiving unit (64) are respectively connected to the left side and the right side of the measuring chamber (10), the data acquisition system is connected with the laser receiving unit (64), the first laser emitting unit (63) emits incident laser into the measuring chamber (10), the laser receiving unit (64) receives the laser emitted by the first laser emitting unit (63) and converts an optical signal into an electrical signal to be sent to the data acquisition system for processing, the transmitting end of the first laser transmitting unit (63) and the receiving end of the laser receiving unit (64) are positioned on the same straight line, the upper end of the measuring chamber (10) is provided with a second through hole communicated with the inside of the measuring chamber, a sealing unit (30) is arranged at the second through hole, the sealing unit (30) is used for shielding the second through hole, the second laser emitting unit (20) is arranged in the sealing unit (30), and is fixedly connected with the sealing unit (30), the laser emitting end of the second laser emitting unit (20) is arranged towards the second through hole, the second laser emitting unit (20) is used for irradiating the coal rock to be detected, the direction adjusting mechanism is in transmission connection with the second laser emitting unit (20), the second laser emitting unit (20) can be driven to move along the X axis, the Y axis and the Z axis respectively.
2. The device for measuring the concentration of gas generated by laser drilling of coal and rock according to claim 1, wherein the data acquisition system comprises a data acquisition card and a processing terminal (40), the data acquisition card is respectively connected with the laser receiving unit (64) and the processing terminal (40), and the data acquisition card is used for acquiring the electric signal sent by the laser receiving unit (64) and converting the acquired electric signal into a digital signal to be transmitted to the processing terminal (40) for processing.
3. The gas concentration measuring device for the laser drilling coal rock according to claim 1, wherein the first laser emitting unit (63) and the laser receiving unit (64) are fixedly connected with the measuring chamber (10) through a horizontally arranged pipeline (50), each pipeline (50) is provided with a purge gas pipeline (51) communicated with the pipeline (50), the purge gas pipeline (51) is externally connected with an air pump or a gas collecting device, and one end of the pipeline (50) close to the measuring chamber (10) is provided with a ball valve (52).
4. The gas concentration measuring device of claim 3, wherein the pipeline (50) comprises a first pipe (53) and a second pipe (54), wherein the first pipe (53) is horizontally arranged at the left side or the right side of the measuring chamber (10), one end of the first pipe (53) close to the measuring chamber (10) is connected with the measuring chamber (10) and is communicated with the inside of the measuring chamber (10), the other end of the first pipe is connected with and is communicated with one end of the second pipe (54) horizontally arranged through a flange (55), the other end of the second pipe (54) is provided with the first laser emitting unit (63) or a laser receiving unit (64), the second pipe (54) is provided with the purge gas pipeline (51) communicated with the inside of the second pipe, and the purge gas pipeline (51) is used for externally connecting an air pump or a gas collecting device, the ball valve (52) is arranged on the first pipe body (53).
5. The device for measuring the concentration of gas generated by laser drilling of coal and rock as claimed in claim 1, wherein the first laser emitting unit (63) is a distributed feedback semiconductor laser and the laser receiving unit (64) is a photodetector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921221617.0U CN210863529U (en) | 2019-07-30 | 2019-07-30 | Gas concentration measuring device for laser drilling coal rock production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921221617.0U CN210863529U (en) | 2019-07-30 | 2019-07-30 | Gas concentration measuring device for laser drilling coal rock production |
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| Publication Number | Publication Date |
|---|---|
| CN210863529U true CN210863529U (en) | 2020-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921221617.0U Expired - Fee Related CN210863529U (en) | 2019-07-30 | 2019-07-30 | Gas concentration measuring device for laser drilling coal rock production |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110411979A (en) * | 2019-07-30 | 2019-11-05 | 中国地质大学（武汉） | A kind of gas concentration measuring apparatus and method of the coal petrography generation of laser drilling |
-
2019
- 2019-07-30 CN CN201921221617.0U patent/CN210863529U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110411979A (en) * | 2019-07-30 | 2019-11-05 | 中国地质大学（武汉） | A kind of gas concentration measuring apparatus and method of the coal petrography generation of laser drilling |
| CN110411979B (en) * | 2019-07-30 | 2023-08-29 | 中国地质大学（武汉） | Device and method for measuring concentration of gas generated by laser drilling coal rock |
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Granted publication date: 20200626 Termination date: 20210730 |