A laser methane sensor for coal mine pipeline

Abstract

This application relates to a laser methane sensor for coal mine pipelines, belonging to the field of coal mine safety equipment technology. It includes a pipe body, a detection component, and a cleaning component. The detection component includes a laser emitter, a laser receiver, and a controller. Both the laser emitter and the laser receiver are fixedly disposed inside the pipe body, facing each other. The controller is fixedly disposed on the outer wall of the pipe body and electrically connected to both the laser emitter and the laser receiver. The cleaning component is disposed on the pipe body and is used to clean the working surfaces of the laser emitter and the laser receiver. This application improves the ease of use of the laser methane sensor.

Description

Technical Field

[0001] This application relates to the field of coal mine safety equipment technology, and in particular to a laser methane sensor for coal mine pipelines. Background Technology

[0002] In the coal mine gas transportation process, real-time monitoring of methane concentration is crucial for preventing safety accidents such as explosions and leaks. Laser methane sensors, due to their advantages of fast response and high measurement accuracy, have become the mainstream monitoring equipment in this field.

[0003] The laser methane sensor mainly consists of two parts: a transmitting unit and a receiving unit. During operation, the transmitting unit emits a laser of a specific wavelength that passes through the detection area inside the pipe and is then received by the receiving unit. Because the molecular structure of methane has an absorption property for light of a specific wavelength, the emitted laser is partially absorbed. The receiver can detect the light signal and analyze and calculate it to determine the methane concentration value.

[0004] In practical use, coal mine gas transport pipelines contain a large amount of particulate matter such as coal dust and rock dust suspended with the airflow. This dust continuously adheres to the working surfaces of the transmitting and receiving units, forming a dust layer. This dust not only attenuates the laser output intensity of the transmitting unit but also absorbs and scatters the signal captured by the receiving head, causing deviations in methane concentration detection and greatly hindering methane concentration monitoring in coal mine pipelines. Utility Model Content

[0005] In order to improve the ease of use of laser methane sensors, this application provides a laser methane sensor for coal mine pipelines.

[0006] This application provides a laser methane sensor for coal mine pipelines, which adopts the following technical solution: A laser methane sensor for coal mine pipelines includes a pipe body, a detection component, and a cleaning component. The detection component includes a laser emitter, a laser receiver, and a controller. The laser emitter and the laser receiver are both fixedly disposed inside the pipe body, and are positioned facing each other. The controller is fixedly disposed on the outer wall of the pipe body and is electrically connected to both the laser emitter and the laser receiver. The cleaning component is disposed on the pipe body and is used to clean the working surfaces of the laser emitter and the laser receiver.

[0007] By adopting the above technical solution, the pipe body is installed on the coal mine gas transportation pipeline during use. Then, the laser emitter and laser receiver are activated. When the gas passes through the pipe body, the laser emitter and laser receiver are used to detect the methane concentration in the pipe body, and the detection results are input into the controller, thereby realizing the monitoring of the methane concentration in the coal mine gas transportation pipeline.

[0008] During use, operators regularly clean the working surfaces of the laser emitter and receiver using the cleaning kit to prevent dust from adhering to them, thereby ensuring the accuracy of methane concentration detection in coal mine pipelines and improving the ease of use of the laser methane sensor.

[0009] Optionally, the cleaning assembly includes a rotating ring, a mounting bracket, a first housing, and a cleaning pad; the rotating ring is coaxially rotatably mounted on the outer wall of the tube; two mounting brackets, two first housings, and two cleaning pads are provided, each corresponding to one of the mounting brackets; two rotating grooves are formed on the tube, each corresponding to one of the mounting brackets; one end of the mounting bracket is located in the rotating groove; the first housing is located inside the tube; both ends of the mounting bracket are fixedly connected to the rotating ring and the first housing, respectively; the cleaning pad is fixedly mounted on the first housing.

[0010] By adopting the above technical solution, when cleaning the working surfaces of the laser emitter and laser receiver, the operator rotates the rotating ring, which drives the mounting bracket to rotate along the rotating groove, thereby driving the first housing and the cleaning cotton pad to rotate. During the rotation, the two cleaning cotton pads wipe and clean the working surfaces of the laser emitter and laser receiver respectively.

[0011] When cleaning the working surfaces of the laser emitter and receiver, there is no need to disassemble them. The operator can clean the working surfaces of the laser emitter and receiver simultaneously by rotating the rotating ring. The operation is simple and improves the ease of use.

[0012] Optionally, the cleaning component further includes a second housing, of which there are two, corresponding one-to-one with the first housing. The second housing is fixedly disposed inside the tube, and the first housing and the second housing can form a box structure.

[0013] By adopting the above technical solution, in the initial state, the first and second shells are in contact, forming a box structure with the cleaning pad located inside. This protects the cleaning pad from contamination by dust carried by the methane gas, ensuring its cleaning effect. Simultaneously, it provides a positioning basis for the cleaning pad's repositioning. After cleaning the laser emitter and receiver, the operator can determine whether the cleaning pad has repositioned by checking if the first and second shells are in contact, preventing incomplete repositioning from obstructing the laser emitter and receiver and affecting the detection of methane concentration in the pipeline.

[0014] Optionally, both the first housing and the second housing are made of magnets, and there is a mutual attraction between the first housing and the second housing.

[0015] By adopting the above technical solution, in the initial state, the first shell and the second shell are attracted and fixed to each other by magnetic force. On the one hand, this ensures that the two can form a stable box structure and avoid gaps caused by external influences, which would affect the protective effect of the cleaning cotton pad. On the other hand, it prevents the cleaning cotton pad from being blocked by external forces on the laser transmitter and laser receiver.

[0016] Optionally, the rotating ring is provided with an indicator pattern, which points from the laser emitting head to the second housing; the rotating ring is also provided with an anti-slip pattern.

[0017] By adopting the above technical solution, when cleaning the working surfaces of the laser emitter and receiver, operators can quickly confirm the rotation direction of the rotating ring by observing the indicator lines, avoiding cleaning errors caused by misjudgment of position. After cleaning, the rotating ring can be quickly reset to its initial position according to the direction of the indicator lines. The anti-slip texture on the outer wall of the rotating ring increases the friction between the hand and the rotating ring, thus facilitating the rotation of the ring.

[0018] Optionally, two sealing grooves are formed on the inner sidewall of the rotating ring, and the two sealing grooves are respectively located on both sides of the rotating groove; a sealing rubber ring is fixedly installed in the sealing groove.

[0019] By adopting the above technical solution, the sealing ring is used to ensure the airtightness between the rotating ring and the pipe body, and to prevent gas in the pipeline from leaking through the rotating groove.

[0020] Optionally, the pipe body is provided with two flanges, which are fixedly installed at both ends of the pipe body, and the flanges are provided with mounting holes.

[0021] By adopting the above technical solution, the pipe body can be easily installed on the gas transmission pipeline using a flange, thereby improving the ease of use of the laser methane sensor.

[0022] Optionally, an alarm component is provided on the pipe body, the alarm component including an indicator light and an alarm; the indicator light and the alarm are both fixedly installed on the outer wall of the pipe body, and the indicator light and the alarm are both electrically connected to the controller.

[0023] By adopting the above technical solution, if the methane concentration is abnormal during the monitoring of the gas transportation pipeline, the controller will activate the indicator lights and alarms to remind the operators to check and handle the situation. The indicator lights and alarms can help the operators quickly determine the location of the abnormal methane concentration, thus facilitating a rapid response to the abnormality.

[0024] In summary, this application includes at least one of the following beneficial technical effects: During use, operators regularly use the cleaning kit to clean the working surfaces of the laser emitter and receiver to prevent dust from adhering to them, thereby ensuring the accuracy of methane concentration detection in coal mine pipelines and improving the ease of use of the laser methane sensor. When cleaning the working surfaces of the laser emitter and receiver, there is no need to disassemble them. The operator can clean the working surfaces of the laser emitter and receiver simultaneously by rotating the rotating ring. The operation is simple and improves the ease of use. Attached Figure Description

[0025] Figure 1 This is a structural schematic diagram of an embodiment of this application; Figure 2 This is a cross-sectional view of the detection component in this embodiment of the application; Figure 3 This is a cross-sectional view of the cleaning component, as shown in this embodiment of the application. Figure 4 This is a cross-sectional view of an embodiment of this application to show the sealing groove.

[0026] Explanation of reference numerals in the attached figures: 1. Pipe body; 11. Rotating groove; 12. Flange; 2. Detection components; 21. Laser emitter; 22. Laser receiver; 23. Controller; 3. Cleaning components; 31. Rotary ring; 311. Indicator pattern; 312. Anti-slip pattern; 313. Sealing groove; 314. Sealing ring; 32. Mounting bracket; 33. First housing; 34. Cleaning pad; 35. Second housing; 4. Alarm components; 41. Indicator lights; 42. Alarm device. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0028] This application discloses a laser methane sensor for coal mine pipelines. (Refer to...) Figure 1 The laser methane sensor for coal mine pipelines includes a pipe body 1, with flanges 12 at both ends of the pipe body 1. Mounting holes are evenly distributed along the circumference of the flanges 12.

[0029] Reference Figure 1 and Figure 2A detection component 2 is installed on the tube body 1, comprising a laser emitter 21, a laser receiver 22, and a controller 23. Both the laser emitter 21 and the laser receiver 22 are fixedly installed inside the tube body 1, facing each other. The laser emitter 21 emits laser light. The laser receiver 22 receives the laser light emitted by the laser emitter 21 and converts it into a laser signal, which is then input to the controller 23. The controller 23 is fixedly installed on the outer wall of the tube body 1 and is electrically connected to both the laser emitter 21 and the laser receiver 22. The controller 23 receives the laser signal transmitted by the laser receiver 22 and processes the data to determine the methane concentration inside the tube body 1. The controller 23 has a display screen to show the detected methane concentration. The controller 23 is electrically connected to a data terminal, enabling it to transmit the detected methane concentration data back to the control terminal in real time.

[0030] An alarm component 4 is provided on the pipe body 1. The alarm component 4 includes an indicator light 41 and an alarm 42. The indicator light 41 and the alarm 42 are both fixedly installed on the outer wall of the pipe body 1. The indicator light 41 and the alarm 42 are both electrically connected to the controller 23. The controller 23 is also used to control the working status of the indicator light 41 and the alarm 42.

[0031] Reference Figure 2 and Figure 3 The tube body 1 is equipped with a cleaning component 3, which includes a rotating ring 31, a mounting bracket 32, a first housing 33, a cleaning pad 34, and a second housing 35. The rotating ring 31 is coaxially disposed on the outside of the tube body 1 and is rotatably connected to the tube body 1, with its rotation axis coinciding with the axis of the tube body 1. Two rotating grooves 11 are formed on the tube body 1, which correspond to the laser emitting head 21 and the laser receiving head 22, respectively.

[0032] Two mounting brackets 32, two first housings 33, two cleaning pads 34, and two second housings 35 are provided, each corresponding to one of the two rotating slots 11. One end of the mounting bracket 32 ​​is located inside the rotating slot 11 and is fixedly connected to the rotating ring 31. The first housing 33 is located inside the tube body 1 and is fixedly mounted on the mounting bracket 32. The cleaning pad 34 is fixedly mounted on the first housing 33 and has an arc-shaped structure. The second housing 35 is fixedly mounted on the inner wall of the tube body 1. The second housing 35 can form a box structure with the first housing 33, and the box structure formed by the first housing 33 and the second housing 35 is compatible with the cleaning pad 34. Both the first housing 33 and the second housing 35 are made of magnets, and there is a mutual attraction between the first housing 33 and the second housing 35. The two second housings 35 are arranged facing each other and are located on both sides of the laser emitter head 21. That is, when one set of first housings 33 and second housings 35 abuts against each other, the other set of first housings 33 and second housings 35 also abuts against each other.

[0033] Reference Figure 1 The outer wall of the rotating ring 31 is provided with an indicator pattern 311, which points from the laser emitting head 21 to the corresponding second housing 35. The outer wall of the rotating ring 31 is provided with anti-slip texture 312.

[0034] Reference Figure 4 Two sealing grooves 313 are formed on the inner sidewall of the rotating ring 31, and the two sealing grooves 313 are located on both sides of the rotating groove 11. A sealing rubber ring 314 is fixedly installed in the sealing groove 313.

[0035] The implementation principle of a laser methane sensor for coal mine pipelines in this application is as follows: During use, the operator installs the pipe body 1 on the gas transportation pipeline using the flange 12, ensuring that the pipe body 1 is connected to the gas transportation pipeline and is well sealed, and that the laser transmitter head 21 and the laser receiver head 22 are in working condition.

[0036] During gas transportation, the gas flows through pipe 1. Simultaneously, laser emitter 21 periodically emits laser light to laser receiver 22. The laser light passes through pipe 1 and is received by laser receiver 22. Laser receiver 22 inputs the received laser signal to controller 23. Controller 23 processes the laser signal transmitted by laser receiver 22 to determine the methane concentration inside pipe 1, thus enabling real-time monitoring of the methane concentration inside pipe 1. If the methane concentration is abnormal, controller 23 controls indicator light 41 to flash, and alarm 42 sounds an alarm to alert the operator to take action.

[0037] After a certain period of use, the operator rotates the rotating ring 31 according to the indicator 311 on the rotating ring 31. The rotating ring 31 drives the two mounting brackets 32 to rotate in the two rotating slots 11 respectively. The mounting brackets 32 drive the first housing 33 and the cleaning cotton pad 34 to rotate. After rotating a certain angle, one of the cleaning cotton pads 34 comes into contact with the working mirror surface of the laser emitter 21, and the other cleaning cotton pad 34 comes into contact with the working mirror surface of the laser receiver 22. The operator rotates the rotating ring 31 back and forth to wipe and clean the working mirror surfaces of the laser emitter 21 and the laser receiver 22. In actual use, the operator can confirm whether the laser emitter 21, the laser receiver 22 and the cleaning cotton pad 34 are in contact by the different feel of the rotating ring 31 when the cleaning cotton pad 34 contacts the working mirror surfaces of the laser emitter 21 and the laser receiver 22. By rotating the rotating ring 31 back and forth at the contact position, the operator can accurately wipe and clean the working mirror surfaces of the laser emitter 21 and the laser receiver 22.

[0038] After cleaning, the operator rotates the rotating ring 31 in the opposite direction. The rotating ring 31 drives the mounting bracket 32 ​​to rotate in the opposite direction, causing the first housing 33 to rotate closer to the second housing 35 until the first housing 33 and the second housing 35 come into contact. At this point, the first housing 33 and the second housing 35 form a box structure, and the cleaning cotton pad 34 is located inside the box. Simultaneously, under the magnetic force between the first housing 33 and the second housing 35, the first housing 33 and the second housing 35 attract and fix each other, completing the cleaning of the laser transmitter head 21 and the laser receiver head 22.

[0039] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A laser methane sensor for coal mine pipelines, characterized in that: The device includes a tube body (1), a detection component (2), and a cleaning component (3). The detection component (2) includes a laser emitter (21), a laser receiver (22), and a controller (23). The laser emitter (21) and the laser receiver (22) are both fixedly disposed inside the tube body (1) and are positioned opposite each other. The controller (23) is fixedly disposed on the outer wall of the tube body (1) and is electrically connected to both the laser emitter (21) and the laser receiver (22). The cleaning component (3) is disposed on the tube body (1) and is used to clean the working surfaces of the laser emitter (21) and the laser receiver (22).

2. The laser methane sensor for coal mine pipelines according to claim 1, characterized in that: The cleaning component (3) includes a rotating ring (31), a mounting bracket (32), a first housing (33), and a cleaning pad (34); the rotating ring (31) is coaxially rotatably mounted on the outer wall of the tube body (1); two mounting brackets (32), two first housings (33), and two cleaning pads (34) are provided, and the mounting brackets (32), the first housings (33), and the cleaning pads (34) correspond one-to-one; two rotating grooves (11) are opened on the tube body (1), and the rotating grooves (11) correspond one-to-one with the mounting brackets (32); one end of the mounting bracket (32) is located in the rotating groove (11); the first housing (33) is located inside the tube body (1); both ends of the mounting bracket (32) are fixedly connected to the rotating ring (31) and the first housing (33) respectively; the cleaning pad (34) is fixedly mounted on the first housing (33).

3. The laser methane sensor for coal mine pipelines according to claim 2, characterized in that: The cleaning component (3) also includes a second housing (35), there are two second housings (35) and they correspond one-to-one with the first housing (33). The second housing (35) is fixedly disposed inside the tube (1). The first housing (33) and the second housing (35) can form a box structure.

4. The laser methane sensor for coal mine pipelines according to claim 3, characterized in that: Both the first housing (33) and the second housing (35) are made of magnets, and there is a mutual attraction between the first housing (33) and the second housing (35).

5. The laser methane sensor for coal mine pipelines according to claim 3, characterized in that: The rotating ring (31) is provided with an indicator pattern (311), which points from the laser emitting head (21) to the second housing (35); the rotating ring (31) is provided with an anti-slip pattern (312).

6. The laser methane sensor for coal mine pipelines according to claim 2, characterized in that: Two sealing grooves (313) are provided on the inner side wall of the rotating ring (31), and the two sealing grooves (313) are located on both sides of the rotating groove (11); a sealing rubber ring (314) is fixedly provided in the sealing groove (313).

7. The laser methane sensor for coal mine pipelines according to claim 1, characterized in that: The pipe body (1) is provided with two flanges (12), which are fixedly installed at both ends of the pipe body (1) respectively, and the flanges (12) are provided with mounting holes.

8. The laser methane sensor for coal mine pipelines according to claim 1, characterized in that: An alarm component (4) is provided on the tube body (1). The alarm component (4) includes an indicator light (41) and an alarm (42). The indicator light (41) and the alarm (42) are both fixedly installed on the outer wall of the tube body (1). The indicator light (41) and the alarm (42) are both electrically connected to the controller (23).

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