Carbon monoxide concentration detection sensor for mining drainage pipeline

Abstract

The utility model discloses a mine drainage pipeline carbon monoxide concentration detection sensor which comprises an outer shell of a carbon monoxide concentration detection device, and the input end of the outer shell is connected with a drainage pipeline through an air inlet pipe; a detection gas chamber is arranged between the input end of the outer shell and the gas inlet pipe, and a gas-water separation assembly is arranged in the gas inlet pipe and located below the detection gas chamber, so that the outer shell conducts gas-water separation treatment on gas sampled from the drainage pipeline through the gas-water separation assembly and guides the gas to the detection gas chamber. According to the utility model, the gas-water separation component is arranged in the gas inlet pipe, so that water vapor in a drainage pipeline is effectively separated, gas entering the detection gas chamber is ensured to be clean and dry, the defects of a traditional diffusion gas chamber sampling mode in a humid environment are overcome, and the stability and the reliability of gas sampling are improved.

Description

Technical Field

[0001] This utility model relates to a carbon monoxide concentration detection sensor for mining drainage pipelines. Background Technology

[0002] In coal mine safety regulations, the management of toxic, harmful, flammable, and explosive gases follows a 12-character principle: "extraction before mining, monitoring and control, and production determined by ventilation." Carbon monoxide is one of the products of gas combustion or explosion, and also a hallmark gas of spontaneous combustion in coal. Monitoring carbon monoxide concentration in gas drainage pipelines allows for timely detection of any abnormalities during gas drainage, such as gas leaks and subsequent combustion. Carbon monoxide is toxic; when it accumulates to a certain concentration in pipelines, it can affect the operation of drainage equipment and even cause damage. By monitoring carbon monoxide concentration, timely measures can be taken to prevent equipment damage due to carbon monoxide poisoning.

[0003] With the continuous development of sensor technology, the performance of carbon monoxide sensors has been greatly improved. Electrochemical carbon monoxide sensors offer advantages such as high sensitivity, simple structure, and low power consumption, accurately detecting low concentrations of carbon monoxide gas in gas drainage pipelines. Simultaneously, the stability and reliability of these sensors have been continuously improved, enabling them to adapt to the complex working environment of underground coal mines and providing technical support for real-time carbon monoxide monitoring.

[0004] Traditional carbon monoxide concentration detection methods mostly employ diffusion chamber sampling, but this is only suitable for roadway environments with low wind speeds and cannot meet the sampling requirements of humid and high-wind-speed air masses. Therefore, a carbon monoxide concentration detection sensor for mine drainage pipelines is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a carbon monoxide concentration detection sensor for mining drainage pipelines, in order to solve the problem in the background art that diffusion chamber sampling is only suitable for roadway environments with low wind speeds and cannot meet the sampling needs of humid and high wind speed gases.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a carbon monoxide concentration detection sensor for a mining drainage pipeline, comprising a housing of a carbon monoxide concentration detection device, wherein the input end of the housing is connected to the drainage pipeline through an air inlet pipe;

[0007] A detection chamber is provided between the input end of the outer casing and the air inlet pipe, and a vapor-water separation component is provided in the air inlet pipe below the detection chamber, so that the outer casing can perform vapor-water separation processing on the gas sampled from the extraction pipeline through the vapor-water separation component and guide it to the detection chamber.

[0008] Preferably, the steam-water separation assembly includes an upper end cover disposed on the upper part of the air inlet pipe and a lower end cover disposed on the lower part of the air inlet pipe. An air outlet pipe is disposed between the upper end cover and the lower end cover. An air inlet pipe connector and an air outlet pipe connector are disposed at the upper end cover, and the output end of the air outlet pipe connector is connected to the input end of the air outlet pipe.

[0009] Preferably, the lower part of the air intake pipe is provided with an air inlet, and the side of the air intake pipe opposite to the air inlet is provided with an air outlet, and the air outlet is connected to the end of the air outlet pipe so that the gas in the air outlet pipe can be discharged through the air outlet.

[0010] Preferably, both the inlet pipe connector and the outlet pipe connector are equipped with a filter body, which is a powder metallurgy sheet. Both the inlet pipe connector and the outlet pipe connector are located inside the detection chamber, and the inlet pipe connector and the outlet pipe connector are interconnected.

[0011] Preferably, a control circuit board is provided inside the outer casing. The control circuit board includes a controller, a detection module, a communication module, a display module, and an alarm module. The detection module, communication module, display module, and alarm module are all connected to the controller.

[0012] The detection module includes a carbon monoxide sensor element disposed inside the detection chamber. The carbon monoxide sensor element is electrically connected to the controller through a signal acquisition and amplification circuit. The signal acquisition and amplification circuit includes an amplifier and a filter, which are used to amplify and filter the signal output by the carbon monoxide sensor element.

[0013] Furthermore, a temperature and pressure compensation circuit is provided at the negative terminal of the signal acquisition and amplification circuit. This circuit includes a temperature sensor to measure the temperature of the detection chamber and correct the output of the carbon monoxide sensor. Because the signal from the carbon monoxide sensor is extremely small, the signal acquisition and amplification circuit is placed downstream of the sensor, as far away as possible, and integrated into the control circuit board to improve its resistance to external electromagnetic interference.

[0014] In addition, a temperature and pressure compensation circuit is used to compensate the detection circuit for temperature and pressure, thereby improving the accuracy and reliability of the carbon monoxide sensing element in environments with temperature and pressure changes.

[0015] Preferably, the communication module includes an RS communication unit and a CAN communication unit, and an intrinsically safe communication interface connected to the communication module is provided on the outer periphery of the housing, so that the RS communication unit and the CAN communication unit can be externally connected through the intrinsically safe communication interface.

[0016] Preferably, the outer casing has a display window on its side, and the display module includes a display screen connected to the control circuit board, with the display screen located inside the display window.

[0017] Preferably, the alarm module includes a buzzer and an alarm light located at the bottom of the housing. Both the buzzer and the alarm light are electrically connected to the control circuit board so that when the detected carbon monoxide concentration exceeds a preset threshold, the control circuit board controls the buzzer to emit an audible alarm and simultaneously controls the alarm light to emit a visual alarm.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] This invention effectively separates water vapor in the extraction and discharge pipeline by setting a vapor-water separation component in the air inlet pipe, ensuring that the gas entering the detection chamber is clean and dry. This solves the shortcomings of the traditional diffusion chamber sampling method in humid environments and improves the stability and reliability of gas sampling.

[0020] The filters installed inside the inlet and outlet pipe connectors further filter impurities in the gas, ensuring the purity of the gas entering the detection chamber and preventing impurities from interfering with the sensing elements.

[0021] By placing the signal acquisition and amplification circuit on the back and integrating it into the control circuit board, away from the sensing elements, the interference from mechanical vibration and electromagnetic induction is reduced, thus improving the stability of signal processing.

[0022] A temperature and pressure compensation circuit is set at the negative terminal of the signal acquisition and amplification circuit. This circuit can compensate for the detected carbon monoxide concentration signal by temperature and pressure, ensuring the accuracy and reliability of the detection results under different environmental conditions. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0024] Figure 2 This is a cross-sectional structural diagram of an embodiment of the present utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the steam-water separation component according to an embodiment of the present utility model;

[0026] Figure 4 This is a top view of the intake pipe structure according to an embodiment of the present utility model;

[0027] Figure 5 This is a schematic diagram of the system flow of an embodiment of the present utility model.

[0028] In the diagram: 1. Outer casing; 2. Inlet pipe; 21. Inlet; 22. Outlet; 3. Detection chamber; 4. Gas-liquid separator; 41. Upper cover; 42. Lower cover; 43. Outlet pipe; 44. Inlet pipe connector; 45. Outlet pipe connector; 5. Control circuit board; 6. Carbon monoxide sensor; 7. Intrinsically safe communication interface; 8. Display window; 9. Display screen; 10. Buzzer; 11. Alarm light. Detailed Implementation

[0029] To address the issue that diffusion chamber sampling is only suitable for roadway environments with low wind speeds and cannot meet the sampling requirements of humid and high-wind-speed gases, this utility model provides a carbon monoxide concentration detection sensor for mine drainage pipelines. The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0030] Please see Figure 1-5 This utility model provides a carbon monoxide concentration detection sensor for a mining drainage pipeline, including a housing 1 for a carbon monoxide concentration detection device, wherein the input end of the housing 1 is connected to the drainage pipeline through an air inlet pipe 2.

[0031] A detection chamber 3 is provided between the input end of the outer casing 1 and the air inlet pipe 2. A vapor-water separation assembly 4 is located below the detection chamber 3 inside the air inlet pipe 2. The vapor-water separation assembly 4 includes an upper end cover 41 located at the top of the air inlet pipe 2 and a lower end cover 42 located at the bottom of the air inlet pipe 2. An outlet pipe 43 is provided between the upper end cover 41 and the lower end cover 42. An air inlet pipe connector 44 and an air outlet pipe connector 45 are located at the upper end cover 41, and the output end of the air outlet pipe connector 45 is connected to the input end of the air outlet pipe 43. An air inlet 21 is provided at the bottom of the air inlet pipe 2, and an air outlet 22 is provided on the side of the air inlet pipe 2 away from the air inlet 21. The air outlet 22 is connected to the end of the air outlet pipe 43 so that the gas in the air outlet pipe 43 can be discharged through the air outlet 22. Both the inlet pipe connector 44 and the outlet pipe connector 45 are equipped with filters, which are powder metallurgy sheets. Both the inlet pipe connector 44 and the outlet pipe connector 45 are located inside the detection gas chamber 3 and are interconnected. This allows the outer shell 1 to separate the gas sampled from the extraction pipeline through the gas-water separation assembly 4 and guide it to the detection gas chamber 3.

[0032] The housing 1 is equipped with a control circuit board 5, which includes a controller, a detection module, a communication module, a display module, and an alarm module. The detection module, communication module, display module, and alarm module are all connected to the controller.

[0033] The detection module includes a carbon monoxide sensor 6 disposed inside the detection chamber 3. The carbon monoxide sensor 6 is electrically connected to the controller through a signal acquisition and amplification circuit. The signal acquisition and amplification circuit includes an amplifier and a filter, which are used to amplify and filter the signal output by the carbon monoxide sensor 6.

[0034] Furthermore, the negative terminal of the signal acquisition and amplification circuit is equipped with a temperature and pressure compensation circuit, which includes a temperature sensor for measuring the temperature of the detection chamber 3 and correcting the output of the carbon monoxide sensing element 6.

[0035] The communication module includes an RS485 communication unit and a CAN communication unit. An intrinsically safe communication interface 7 connected to the communication module is provided on the outer periphery of the housing 1 so that the RS485 communication unit and the CAN communication unit can be externally connected through the intrinsically safe communication interface 7.

[0036] The outer casing 1 has a display window 8 on one side, and the display module includes a display screen 9 connected to the control circuit board 5, and the display screen 9 is located inside the display window 8.

[0037] The alarm module includes a buzzer 10 and an alarm light 11 located at the bottom of the housing. Both the buzzer 10 and the alarm light 11 are electrically connected to the control circuit board 5 so that when the detected carbon monoxide concentration exceeds a preset threshold, the control circuit board 5 controls the buzzer 10 to emit an audible alarm and simultaneously controls the alarm light 11 to emit a visual alarm.

[0038] The working principle of the carbon monoxide concentration detection sensor for mining drainage pipeline provided by this utility model is as follows: The mixed gas in the drainage pipeline enters from the air inlet of the gas-water separator, passes through the air inlet pipe and the upper end cover, and is filtered by the filter body in the air inlet pipe joint. The gas then passes through the air inlet pipe joint and enters the detection gas chamber. After passing through the air outlet joint, it is discharged from the air outlet through the air outlet pipe. The water vapor blocked by the filter body condenses into water droplets, flows down the pipe by itself, and is discharged from the air outlet of the air inlet pipe.

[0039] When gas enters the detection chamber, the control circuit board controls the carbon monoxide sensor to detect the gas inside the chamber. When the detected carbon monoxide concentration exceeds the preset threshold, the control command is output through the serial port SPI to control the buzzer and alarm light to emit an audible and visual alarm.

[0040] The colleague sends the collected and processed detection values ​​to the display screen via the I2C channel.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A carbon monoxide concentration detection sensor for mining drainage pipelines, characterized in that: The device includes a housing (1) for detecting carbon monoxide concentration, the input end of which is connected to the extraction / discharge pipeline via an air inlet pipe (2); A detection chamber (3) is provided between the input end of the outer shell (1) and the air inlet pipe (2), and a gas-water separation component (4) is provided in the air inlet pipe (2) below the detection chamber (3) so that the outer shell (1) can perform gas-water separation processing on the gas sampled from the extraction pipeline through the gas-water separation component (4) and guide it to the detection chamber (3).

2. The carbon monoxide concentration detection sensor for a mine drainage pipeline according to claim 1, characterized in that: The steam-water separation component (4) includes an upper end cover (41) disposed on the upper part of the air inlet pipe (2) and a lower end cover (42) disposed on the lower part of the air inlet pipe (2). An air outlet pipe (43) is disposed between the upper end cover (41) and the lower end cover (42). An air inlet pipe connector (44) and an air outlet pipe connector (45) are disposed at the upper end cover (41), and the output end of the air outlet pipe connector (45) is connected to the input end of the air outlet pipe (43).

3. A carbon monoxide concentration detection sensor for a mine drainage pipeline according to claim 2, characterized in that: The lower part of the air inlet pipe (2) is provided with an air inlet (21), and the side of the air inlet pipe (2) away from the air inlet (21) is provided with an air outlet (22), and the air outlet (22) is connected to the end of the air outlet pipe (43) so that the gas in the air outlet pipe (43) is discharged through the air outlet (22).

4. A carbon monoxide concentration detection sensor for mining drainage pipelines according to claim 3, characterized in that: The air inlet pipe connector (44) and the air outlet pipe connector (45) are both equipped with a filter body, which is a powder metallurgy sheet. The air inlet pipe connector (44) and the air outlet pipe connector (45) are both located inside the detection gas chamber (3), and the air inlet pipe connector (44) and the air outlet pipe connector (45) are interconnected.

5. A carbon monoxide concentration detection sensor for mine drainage pipelines according to claim 4, characterized in that: The outer casing (1) is provided with a control circuit board (5), which includes a controller, a detection module, a communication module, a display module and an alarm module. The detection module, communication module, display module and alarm module are all connected to the controller. The detection module includes a carbon monoxide sensing element (6) disposed inside the detection chamber (3). The carbon monoxide sensing element (6) is electrically connected to the controller through a signal acquisition and amplification circuit. The signal acquisition and amplification circuit includes an amplifier and a filter, which are used to amplify and filter the signal output by the carbon monoxide sensing element (6). Furthermore, the negative terminal of the signal acquisition and amplification circuit is provided with a temperature and pressure compensation circuit, which includes a temperature sensor for measuring the temperature of the detection chamber (3) and correcting the output of the carbon monoxide sensing element (6).

6. A carbon monoxide concentration detection sensor for a mine drainage pipeline according to claim 5, characterized in that: The communication module includes an RS485 communication unit and a CAN communication unit. The outer periphery of the housing (1) is provided with an intrinsically safe communication interface (7) connected to the communication module, so that the RS485 communication unit and the CAN communication unit can be externally connected through the intrinsically safe communication interface (7).

7. A carbon monoxide concentration detection sensor for mine drainage pipelines according to claim 6, characterized in that: The outer casing (1) has a display window (8) on one side. The display module includes a display screen (9) connected to the control circuit board (5), and the display screen (9) is located inside the display window (8).

8. A carbon monoxide concentration detection sensor for a mine drainage pipeline according to claim 7, characterized in that: The alarm module includes a buzzer (10) and an alarm light (11) located at the bottom of the housing. Both the buzzer (10) and the alarm light (11) are electrically connected to the control circuit board (5) so that when the detected carbon monoxide concentration exceeds the preset threshold, the control circuit board (5) controls the buzzer (10) to emit an audible alarm and simultaneously controls the alarm light (11) to emit a visual alarm.

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