Environment parameter monitoring device and method in sealed area of coal mine underground
By adopting a dual-pump system and multi-probe design in the environmental parameter monitoring device inside and outside the confined area of the coal mine, the problem of low efficiency of traditional monitoring methods has been solved, and efficient and real-time environmental parameter monitoring has been achieved, improving monitoring accuracy and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- TIANDI CHANGZHOU AUTOMATION
- Filing Date
- 2024-10-16
- Publication Date
- 2026-05-15
AI Technical Summary
Traditional methods for monitoring enclosed areas in underground coal mines are costly, time-consuming, and inefficient, resulting in monitoring data that cannot reflect the actual state of enclosed goaf areas in real time.
Design a monitoring device for environmental parameters inside and outside a sealed area in a coal mine. The device includes a control module, a gas delivery module, and a gas detection module. It uses a dual-pump system to extract gas from inside and outside the sealed wall, and combines a differential pressure chip and a temperature probe for real-time monitoring. The data is automatically uploaded to the host computer software.
It enables automatic detection of the internal and external environment of the confined area, improves monitoring accuracy and speed, ensures real-time data upload, and can simultaneously monitor differential pressure and temperature changes to prevent the leakage of toxic and harmful gases.
Smart Images
Figure CN119555142B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the technical field of automatic monitoring of mixed gas, temperature, and differential pressure inside and outside confined areas in underground coal mines, and in particular to a device and method for monitoring environmental parameters inside and outside confined areas in underground coal mines. Background Technology
[0002] Most underground sealed areas in coal mines are formed by artificial sealing of goaf areas after the working face has been mined out. Temporary or permanent sealed areas also exist for other reasons. Daily management and monitoring of these underground sealed areas is an indispensable part of coal mine production. Traditional monitoring methods for underground sealed areas in coal mines mainly rely on manual air extraction and surface detection or bundled tube air extraction. These traditional methods suffer from high costs, long processing times, and low efficiency. These problems severely restrict the real-time nature and effectiveness of environmental monitoring inside and outside the underground sealed areas, resulting in monitoring data that largely fails to reflect the actual state of the sealed goaf. Summary of the Invention
[0003] The present invention aims to solve at least one of the technical problems existing in the prior art.
[0004] Therefore, this invention proposes a device and method for monitoring environmental parameters inside and outside the confined area of a coal mine, which can improve the effectiveness and accuracy of monitoring the environment inside and outside the confined area of a coal mine, while also reducing costs and increasing efficiency.
[0005] According to an embodiment of the present invention, a monitoring device for environmental parameters inside and outside a sealed area in a coal mine includes a control module, a gas delivery module, a gas detection module, and a housing. The control module is located inside the housing. The gas delivery module includes a first air pump, a second air pump, a first gas-water separator, a second gas-water separator, an internal gas pipe, and an external gas pipe located outside the housing. One end of the first air pump is connected to the first gas-water separator for extracting gas outside the sealed wall, and the other end of the first air pump is connected to the gas detection module. One end of the second air pump is connected to the second gas-water separator for extracting gas inside the sealed wall, and the other end of the second air pump is connected to the gas detection module. The gas detection module includes a first gas chamber, a second gas chamber, a differential pressure chip, and a first platinum resistance temperature probe and a second platinum resistance temperature probe located outside the housing. The first gas chamber contains... Multiple gas probes are used to detect the concentration of each component in the mixed gas; the second gas chamber contains an H2S gas probe to detect the concentration of H2S in the mixed gas; the differential pressure chip is used to monitor the differential pressure change inside and outside the sealed wall in real time, and the first and second platinum resistance temperature probes are used to monitor the temperature change inside and outside the sealed wall in real time; the outer shell is provided with a gas monitoring inlet outside the sealed wall, a gas monitoring inlet inside the sealed wall, and a pressure monitoring inlet inside the sealed wall; one end of the gas monitoring inlet outside the sealed wall is connected to the first gas-water separator, and the other end is connected to the external environment of the sealed wall; one end of the gas monitoring inlet inside the sealed wall is connected to the second gas-water separator, and the other end is connected to the internal environment of the sealed wall; one end of the pressure monitoring inlet inside the sealed wall is connected to the differential pressure chip, and the other end is connected to the internal environment of the sealed wall.
[0006] The method for monitoring environmental parameters inside and outside a confined area in a coal mine according to an embodiment of the present invention includes the following steps:
[0007] Step 1: Select the working mode: The monitoring device for environmental parameters inside and outside the closed area in the coal mine has three working modes: the wall-only sampling mode, the wall-only sampling mode, and the wall-and-inside sampling mode. The wall-only sampling mode corresponds to the action of the second air pump, the wall-only sampling mode corresponds to the action of the first air pump, and the wall-and-inside sampling mode corresponds to the continuous action of the first air pump and the second air pump. After selecting the working mode, the detection cycle time is set by the host computer software or mobile Bluetooth.
[0008] Step 2, Install the device: Connect the gas monitoring inlet outside the sealed wall, the gas monitoring inlet inside the sealed wall, and the pressure monitoring inlet inside the sealed wall to the external air pipes respectively. The external air pipes connecting the gas monitoring inlet inside the sealed wall and the pressure monitoring inlet inside the sealed wall extend into the sealed wall, while the external air pipe connecting the gas monitoring inlet outside the sealed wall is placed outside the sealed wall.
[0009] Step 3, Gas Extraction and Detection: The pumps operate differently in the three operating modes. In the wall-only extraction mode, only the second pump is activated, and the device extracts and detects the gas inside the wall. In the wall-only extraction mode, only the first pump is activated, and the device extracts and detects the gas outside the wall. In the combined wall-inside and wall-outside extraction mode, the first and second pumps are activated sequentially to detect the gas inside and outside the wall. In all three operating modes, the differential pressure chip, the first platinum resistance temperature probe, and the second platinum resistance temperature probe are all in operation, monitoring the differential pressure and temperature changes inside and outside the sealed wall in real time. The monitoring data is uploaded to the host computer software in real time.
[0010] The beneficial effects of this invention are that it improves the accuracy and speed of environmental monitoring inside and outside confined areas in coal mines, specifically including the following advantages:
[0011] I. Traditional monitoring of the environment inside and outside a sealed wall requires manual underground air extraction and surface testing, which is time-consuming and labor-intensive. The device and method for monitoring environmental parameters inside and outside a sealed area in a coal mine, as proposed in this invention, can realize the automatic detection of data inside and outside the sealed wall, and can automatically upload the data after the detection is completed.
[0012] Second, most existing automatic environmental monitoring devices for confined areas can only detect the mixed gas in one environment within the confined wall, and most are not compatible with differential pressure monitoring. The environmental parameter monitoring device for the confined area inside and outside the coal mine of this invention contains dual pumps, which can automatically and continuously monitor the parameters inside and outside the confined wall. At the same time, it has a large-range, high-precision differential pressure chip embedded in it, which can monitor the differential pressure inside and outside the confined wall.
[0013] Third, the device and method for monitoring environmental parameters inside and outside the sealed area in underground coal mines of the present invention have an exhaust port that is directly connected to the sealed wall. The gas detected is discharged back into the sealed wall through the exhaust port, ensuring that the toxic and harmful gases extracted from the sealed wall will not leak out.
[0014] According to one embodiment of the present invention, the control module is provided with a first air pump control board for controlling the start and stop of the first air pump and a second air pump control board for controlling the start and stop of the second air pump.
[0015] According to one embodiment of the present invention, the control module is provided with a Bluetooth transceiver module for controlling the start and stop of the first air pump and the second air pump by connecting to an external mobile device via Bluetooth.
[0016] According to one embodiment of the present invention, the control module is provided with a timer for timing the start and stop of the first air pump and the second air pump.
[0017] According to one embodiment of the present invention, the first gas chamber is connected to the second gas chamber, and a one-way valve is provided between the first gas chamber and the second gas chamber to ensure that the mixed gas can only flow from the first gas chamber to the second gas chamber.
[0018] According to one embodiment of the present invention, the first gas chamber contains a CO gas probe, a CO2 gas probe, an O2 gas probe, and a CH4 gas probe.
[0019] According to one embodiment of the present invention, when the working mode selected in step 1 is the wall-only extraction mode, the specific steps of step 3 are as follows: the second air pump is turned on by the host computer software or the mobile terminal via Bluetooth. After the second air pump is turned on, air is extracted from inside the sealed wall. The mixed gas flows through the second gas-water separator for filtration and then enters the first air chamber. The gas probe in the first air chamber detects the mixed gas. At the same time, the mixed gas continues to flow to the second air chamber, where the gas probe detects the mixed gas. Subsequently, the mixed gas is discharged from the sealed wall gas monitoring outlet on the outer shell. After the second air pump has been turned on for a period of time, the data detected by the probes in the first and second air chambers is directly uploaded to the host computer software by the control module. After the data is uploaded, the second air pump is automatically turned off.
[0020] According to one embodiment of the present invention, when the working mode selected in step 1 is the external wall extraction mode, the specific steps of step 3 are as follows: the first air pump is started by the host computer software or the mobile terminal via Bluetooth. After the first air pump is started, air is extracted from outside the sealed wall. The mixed gas flows through the first gas-water separator for filtration and enters the first gas chamber. The gas probe in the first gas chamber detects the mixed gas. At the same time, the mixed gas continues to flow to the second gas chamber, where the gas probe detects the mixed gas. Subsequently, the mixed gas is discharged from the sealed wall gas monitoring outlet on the outer shell. After the first air pump has been running for a period of time, the data detected by the probes in the first and second gas chambers is directly uploaded to the host computer software by the control module. After the data is uploaded, the first air pump is automatically turned off.
[0021] According to an embodiment of the present invention, when the working mode selected in step 1 is the combined indoor and outdoor extraction mode, the specific steps of step 3 are as follows: the first air pump is activated by the host computer software or mobile terminal via Bluetooth. After the first air pump is activated, extraction begins from outside the sealed wall. The mixed gas flows through the first gas-water separator for filtration and enters the first gas chamber. The gas probe in the first gas chamber detects the mixed gas. At the same time, the mixed gas continues to flow to the second gas chamber, where the gas probe detects the mixed gas. Subsequently, the mixed gas is discharged from the sealed wall gas monitoring outlet on the outer shell. After the first air pump has been activated for a period of time, the data detected by the probes in the first and second gas chambers is directly uploaded to the host computer software by the control module. After the data is uploaded, the first air pump is automatically shut off, and the second air pump is activated sequentially, expediting extraction begins from inside the sealed wall. The mixed gas flows from the second gas-water separator to the first and second gas chambers. After the second air pump 2 has been activated for a period of time, the monitoring data is uploaded to the host computer software.
[0022] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.
[0023] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description
[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0025] Figure 1 This is a schematic diagram of the structure of the monitoring device for environmental parameters inside and outside the confined area of a coal mine, based on the present invention.
[0026] Figure 2 This is a schematic diagram of the measurement of environmental parameters inside and outside the confined area of a coal mine, based on the present invention.
[0027] The labels in the diagram are as follows: 1. First air pump; 2. Second air pump; 3. First gas-water separator; 4. Second gas-water separator; 5. First gas chamber; 6. Second gas chamber; 7. Four-way connector; 8. Differential pressure chip; 9. First temperature interface; 10. Second temperature interface; 11. First platinum resistance temperature probe; 12. Second platinum resistance temperature probe; 13. Waterproof and breathable plug; 14. Gas monitoring inlet outside the sealed wall; 15. Gas monitoring inlet inside the sealed wall. 16. Pressure monitoring inlet inside the sealed wall; 17. First platinum resistance external wall monitoring inlet; 18. Second platinum resistance internal wall monitoring inlet; 19. Non-hydrogen sulfide gas calibration inlet; 20. Gas monitoring outlet inside the sealed wall; 21. Hydrogen sulfide gas calibration inlet; 22. Audible and visual alarm; 23. Power port; 24. Basic function board; 25. First air pump control board; 26. Second air pump control board; 27. Timer; 28. Bluetooth transceiver module; 29. Water outlet. Detailed Implementation
[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0029] In the description of this invention, it should be understood that the terms "one side", "the other side", "both sides", "between", "middle", "upper end", "lower end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.
[0030] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0031] The following describes in detail, with reference to the accompanying drawings, an embodiment of the present invention, a device and method for monitoring environmental parameters inside and outside a closed area in a coal mine.
[0032] See Figure 1 and Figure 2The present invention relates to a monitoring device for environmental parameters inside and outside a closed area in a coal mine (hereinafter referred to as the device), which mainly consists of four parts: a control module, a gas delivery module, a gas detection module, and a shell.
[0033] The control module is located inside the housing. It includes a first air pump control board 25 for controlling the start and stop of the first air pump 1 and a second air pump control board 26 for controlling the start and stop of the second air pump 2. The control module also includes a Bluetooth transceiver module 28 for controlling the start and stop of the first air pump 1 and the second air pump 2 via a Bluetooth connection to an external mobile device. Finally, the control module includes a timer 27 for timed control of the start and stop of the first air pump 1 and the second air pump 2.
[0034] Specifically, the control module is a circuit board embedded inside the housing, on which a first air pump control board 25 is embedded. The first air pump control board 25 receives signals and simultaneously sends signals to the controller within the first air pump 1, thereby controlling the start and stop of the first air pump 1. A second air pump control board 26 is embedded on the circuit board. The second air pump control board 26 receives signals and simultaneously sends signals to the controller within the second air pump 2, thereby controlling the start and stop of the second air pump 2. A Bluetooth transceiver module 28 is embedded on the circuit board, allowing external mobile devices to connect via Bluetooth and control the start and stop of the first air pump 1 and the second air pump 2 respectively. A timer 27 is embedded on the circuit board, allowing the time to be set via host computer software, Bluetooth, etc., to control the start and stop of the first air pump 1 and the second air pump 2 at set intervals. A basic function board 24 for maintaining the normal operation of the device is embedded on the circuit board.
[0035] The gas delivery module includes a first air pump 1, a second air pump 2, a first gas-water separator 3, a second gas-water separator 4, an internal gas pipe, an external gas pipe, and a four-way connector 7. The first air pump 1, the second air pump 2, the first gas-water separator 3, the internal gas pipe, the second gas-water separator 4, and the four-way connector 7 are all located inside the outer casing, while the external gas pipe is located outside the outer casing. One end of the first air pump 1 is connected to the first gas-water separator 3 for extracting gas from outside the sealed wall, and the other end of the first air pump 1 is connected to the gas detection module. One end of the second air pump 2 is connected to the second gas-water separator 4 for extracting gas from inside the sealed wall, and the other end of the second air pump 2 is connected to the gas detection module.
[0036] Specifically, the first air pump 1 has an embedded controller that controls its start and stop. The controller is controlled via Bluetooth and a signal transmission line (which corresponds to the host computer software). One end of the first air pump 1 is connected to the first gas-water separator 3 via an internal air pipe to extract gas from outside the sealed wall. The other end of the first air pump 1 is connected to the gas detection module via a four-way connector 7. The first gas-water separator 3 filters the gas extracted from outside the sealed wall by the first air pump 1, and the separated water is discharged through the outlet 29. The second air pump 2 has the same structure as the first air pump 1, but it is connected to the second gas-water separator 4 to extract gas from inside the sealed wall. The other end of the second air pump 2 is connected to the gas detection module via the four-way connector 7. The second gas-water separator 4 filters the gas extracted from inside the sealed wall by the second air pump 2, and the separated water is discharged through the outlet. The internal air pipe is used to transport the gas inside the device. The external air pipe is used to transport the gas extracted from outside and inside the sealed wall by the first air pump 1 and the second air pump 2, respectively. The four-way connector 7 is responsible for transmitting the gas extracted by the first air pump 1 and the second air pump 2 from outside and inside the sealed wall to the gas detection module.
[0037] The gas detection module includes a first gas chamber 5, a second gas chamber 6, a differential pressure chip 8, a first temperature interface 9, a second temperature interface 10, a first platinum resistance temperature probe 11, and a second platinum resistance temperature probe 12. The first gas chamber 5, the second gas chamber 6, the differential pressure chip 8, the first temperature interface 9, and the second temperature interface 10 are all located inside the outer casing, while the first platinum resistance temperature probe 11 and the second platinum resistance temperature probe 12 are both located outside the outer casing. The first gas chamber 5 contains multiple gas probes for detecting the concentration of each component in the mixed gas; the second gas chamber 6 contains an H2S gas probe for detecting the concentration of H2S in the mixed gas; the differential pressure chip 8 is used to monitor the differential pressure changes inside and outside the sealed wall in real time; and the first platinum resistance temperature probe 11 and the second platinum resistance temperature probe 12 are used to monitor the temperature changes inside and outside the sealed wall in real time. The first gas chamber 5 is connected to the second gas chamber 6. A one-way valve is provided between the first gas chamber 5 and the second gas chamber 6 to ensure that the mixed gas can only flow from the first gas chamber 5 to the second gas chamber 6.
[0038] Specifically, the first gas chamber 5 contains multiple gas probes, including CO, CO2, O2, and CH4. These probes accurately detect the concentration of each component in the gas mixture. It should be noted that the H2S gas probe is not included. The second gas chamber 6 contains only an H2S gas probe, used to detect the concentration of H2S in the gas mixture. The first and second gas chambers 5 are connected by an internal gas tube. A one-way valve is installed at the connection point between the internal gas tube and the second gas chamber 6. This one-way valve ensures that the gas mixture can only flow from the first gas chamber 5 to the second gas chamber 6, preventing backflow. This design aims to prevent high-concentration H2S gas from flowing into the first gas chamber 5 during H2S probe calibration, thus avoiding interference with the accuracy of other gas probe concentration detections. The differential pressure chip 8 has two external interfaces. One interface connects to the pressure monitoring inlet 16 inside the sealed wall on the outer casing via an internal air tube. The pressure monitoring inlet 16 inside the sealed wall is connected to an external air tube that extends into the sealed wall. The other interface is not connected to the internal air tube and directly contacts the internal environment of the device. The outer casing is equipped with a waterproof and breathable plug 13 to ensure that the internal air pressure of the device is the same as the external pressure. The first platinum resistance temperature probe 11 is connected to the first temperature interface 9. The first platinum resistance temperature probe 11 passes through the first platinum resistance wall external monitoring inlet 17 on the outer casing and is placed outside the sealed wall to monitor the external ambient temperature. The second platinum resistance temperature probe 12 is connected to the second temperature interface 10. The second platinum resistance temperature probe 12 passes through the second platinum resistance wall internal monitoring inlet 18 on the outer casing and is extended into the sealed wall to monitor the internal ambient temperature. The differential pressure chip 8, the first temperature interface 9, and the second temperature interface 10 are all located on the internal circuit board of the device.
[0039] The outer casing is provided with an external gas monitoring inlet 14, an internal gas monitoring inlet 15, and an internal pressure monitoring inlet 16. One end of the external gas monitoring inlet 14 is connected to the first gas-water separator 3, and the other end is connected to the external environment of the sealed wall. One end of the internal gas monitoring inlet 15 is connected to the second gas-water separator 4, and the other end is connected to the internal environment of the sealed wall. One end of the internal pressure monitoring inlet 16 is connected to the differential pressure chip 8, and the other end is connected to the internal environment of the sealed wall.
[0040] Specifically, the outer casing is a stainless steel protective shell, and includes an external gas monitoring inlet 14 (quick-connect through plate), an internal gas monitoring inlet 15 (quick-connect through plate), an internal pressure monitoring inlet 16 (quick-connect through plate), a first platinum resistance external monitoring inlet 17 (waterproof connector), a second platinum resistance internal monitoring inlet 18 (waterproof connector), a non-hydrogen sulfide gas calibration inlet 19 (quick-connect through plate), an external gas monitoring outlet 20 (quick-connect through plate), a hydrogen sulfide gas calibration inlet 21 (quick-connect through plate), an audible and visual alarm 22, a power port 23, and a waterproof and breathable plug 13. The external gas monitoring inlet 14 is internally connected to the first gas-water separator 3 and externally connected to an external gas pipe, which connects to the external environment of the sealed wall. The internal gas monitoring inlet 15 is internally connected to the second gas-water separator 4 and externally connected to an external gas pipe, which extends into the interior of the sealed wall. The pressure monitoring inlet 16 inside the sealed wall is connected to a differential pressure chip 8 and an external gas pipe that extends into the sealed wall. The first platinum resistance external monitoring inlet 17 is used for the first platinum resistance probe connected to the first temperature interface 9, which protrudes and is placed outside the sealed wall. The second platinum resistance internal monitoring inlet 18 is used for the second platinum resistance probe connected to the second temperature interface 10, which protrudes and extends into the sealed wall. The non-hydrogen sulfide gas calibration inlet 19 is used for calibrating the gas probe in the first gas chamber 5. It is sealed during non-calibration periods. During calibration, the outlet of the mixed gas calibration bottle is inserted into the non-hydrogen sulfide gas calibration inlet 19. The non-hydrogen sulfide gas calibration inlet 19 is connected to an internal gas pipe, and the gas is diffused into the first gas chamber 5 through the four-way connector 7 for gas probe calibration. The sealed wall gas monitoring outlet 20 connects to an external gas pipe extending into the sealed wall during normal monitoring. Internally, it connects to the second gas chamber 6 via an internal gas pipe. Detected gas is discharged back into the sealed wall through the outlet 20 to prevent leakage of harmful gases. During calibration, the gas discharged after calibration is also collected separately from the outlet 20. The hydrogen sulfide gas calibration inlet 21 is used for calibrating the H2S probe in the second gas chamber 6. During use, the outlet of the H2S gas calibration bottle is connected to the hydrogen sulfide gas calibration inlet 21, which is directly connected to the second gas chamber 6 via an internal gas pipe. The audible and visual alarm 22 is used to trigger an audible and visual alarm when the gas concentration exceeds the limit. The power port 23 is used to connect to the power supply. The waterproof and breathable plug 13 is used to balance the pressure inside and outside the device.
[0041] See Figure 1 and Figure 2 The present invention provides a method for monitoring environmental parameters inside and outside a confined area in a coal mine, comprising the following steps:
[0042] Step 1: Select the working mode: The monitoring device for environmental parameters inside and outside the closed area in the coal mine has three working modes: the wall-only sampling mode, the wall-only sampling mode, and the wall-and-inside sampling mode. The wall-only sampling mode corresponds to the action of the second air pump 2, the wall-only sampling mode corresponds to the action of the first air pump 1, and the wall-and-inside sampling mode corresponds to the action of the first air pump 1 and the second air pump 2 in succession. After selecting the working mode, the detection cycle time is set by the host computer software or mobile Bluetooth to the timer 27.
[0043] Step 2, Install the device: Connect the gas monitoring inlet 14 outside the sealed wall, the gas monitoring inlet 15 inside the sealed wall, and the pressure monitoring inlet 16 inside the sealed wall to the external air pipes respectively. The external air pipes connecting the gas monitoring inlet 15 inside the sealed wall and the pressure monitoring inlet 16 inside the sealed wall extend into the inside of the sealed wall, while the external air pipe connecting the gas monitoring inlet 14 outside the sealed wall is placed outside the sealed wall.
[0044] Step 3, Gas Extraction and Detection: The activation status of the corresponding pumps differs in the three working modes of the device. In the wall-only extraction mode, only the second air pump 2 is activated, and the device extracts and detects the gas in the wall environment. In the wall-only extraction mode, only the first air pump 1 is activated, and the device extracts and detects the gas in the wall environment. In the combined wall and wall extraction mode, the first air pump 1 and the second air pump 2 are activated sequentially to detect the gas inside and outside the wall. In all three working modes, the differential pressure chip 8, the first platinum resistance temperature probe 11, and the second platinum resistance temperature probe 12 are all in working condition to monitor the differential pressure and temperature changes inside and outside the sealed wall in real time, and the monitoring data is uploaded to the host computer software in real time.
[0045] When the working mode selected in step 1 is the wall-only extraction mode, the specific steps of step 3 are as follows: The second air pump 2 is turned on by the host computer software or mobile Bluetooth control. After the second air pump 2 is turned on, it starts to extract air from inside the sealed wall. The mixed gas flows through the second gas-water separator 4 for filtration and then enters the first air chamber 5. The gas probe in the first air chamber 5 detects the mixed gas. At the same time, the mixed gas continues to flow to the second air chamber 6, where the gas probe detects the mixed gas. Subsequently, the mixed gas is discharged from the sealed wall gas monitoring outlet 20 on the outer shell. After the second air pump 2 has been turned on for a period of time, the data detected by the probes in the first air chamber 5 and the second air chamber 6 is directly uploaded to the host computer software by the control module. After the data is uploaded, the second air pump 2 is automatically turned off.
[0046] When the working mode selected in step 1 is the external wall extraction mode only, the specific steps of step 3 are as follows: The first air pump 1 is started to extract air by the host computer software or mobile terminal Bluetooth control. After the first air pump 1 is turned on, air is extracted from the outside of the sealed wall. The mixed gas flows through the first gas-water separator 3 for filtration and enters the first air chamber cavity 5. The gas probe in the first air chamber cavity 5 detects the mixed gas. At the same time, the mixed gas continues to flow to the second air chamber cavity 6, where the gas probe detects the mixed gas. Subsequently, the mixed gas is discharged from the sealed wall gas monitoring outlet 20 on the outer shell. After the first air pump 1 has been turned on for a period of time, the data detected by the probes in the first air chamber cavity 5 and the second air chamber cavity 6 is directly uploaded to the host computer software by the control module. After the data is uploaded, the first air pump 1 is automatically turned off.
[0047] When the working mode selected in step 1 is the combined indoor and outdoor extraction mode, the specific steps of step 3 are as follows: The first air pump 1 is activated by the host computer software or mobile Bluetooth control. After the first air pump 1 is activated, air extraction begins from outside the sealed wall. The mixed gas flows through the first gas-water separator 3 for filtration and then enters the first gas chamber 5. The gas probe in the first gas chamber 5 detects the mixed gas. At the same time, the mixed gas continues to flow to the second gas chamber 6, where the gas probe detects the mixed gas. Subsequently, the mixed gas is discharged from the sealed wall gas monitoring outlet 20 on the outer shell. After the first air pump 1 has been activated for a period of time, the data detected by the probes in the first and second gas chambers 5 and 6 is directly uploaded to the host computer software by the control module. After the data is uploaded, the first air pump 1 is automatically turned off, and the second air pump 2 is activated sequentially, activating air extraction from inside the sealed wall. The mixed gas flows through the second gas-water separator 4 to the first and second gas chambers 5 and 6. After the second air pump 2 has been activated for a period of time, the monitoring data is uploaded to the host computer software.
[0048] Specifically, the method for monitoring environmental parameters inside and outside the confined area of a coal mine includes the following steps:
[0049] The first step is to select the working mode: The monitoring device for environmental parameters inside and outside the confined area of a coal mine corresponds to three working modes: internal wall sampling only, external wall sampling only, and combined internal and external wall sampling. Internal wall sampling only corresponds to the operation of the second air pump 2; external wall sampling only corresponds to the operation of the first air pump 1; and combined internal and external wall sampling corresponds to the continuous operation of the first air pump 1 and the second air pump 2. After selecting the working mode, the detection cycle time of timer 27 is set via the host computer software or mobile Bluetooth. The settable time interval for timer 27 is normally open or 15 minutes. The interval can be set to 30 minutes, 1 hour, 8 hours, 24 hours, or 72 hours. If the interval is set to 15 minutes, the device will automatically start detecting once every 15 minutes. The device will be in sleep mode at other times. However, during the sleep period, it can be actively woken up by the host computer software or mobile device via Bluetooth to perform air extraction detection without affecting the interval. Alarm limits for different parameters can be set through the basic function board 24. When the monitored value of any one or more parameters exceeds the set limit, the basic function board 24 will trigger the audible and visual alarm 22 to perform an audible and visual alarm.
[0050] The second step involves connecting external air pipes to the gas monitoring inlet 14 outside the sealed wall, the gas monitoring inlet 15 inside the sealed wall, and the pressure monitoring inlet 16 inside the sealed wall. The external air pipes connecting the gas monitoring inlet 15 and the pressure monitoring inlet 16 inside the sealed wall extend into the sealed wall, while the external air pipe connecting the gas monitoring inlet 14 outside the sealed wall is placed outside the sealed wall. At the same time, the first platinum resistance temperature probe 11 is placed outside the sealed wall, and the second platinum resistance temperature probe 12 extends into the sealed wall. The temperature monitoring inside and outside the wall and the differential pressure monitoring are real-time monitoring parameters and are not controlled by the timer 27.
[0051] The third step, taking the combined inside-and-outside-wall extraction mode as an example, involves controlling the first air pump 1 to start extraction via the host computer software or a mobile device using Bluetooth. The first air pump 1 and the second air pump 2 cannot be activated simultaneously. After the first air pump 1 is activated, air is extracted from outside the sealed wall. The mixed gas flows through the first gas-water separator 3 for filtration and then enters the first air chamber 5 through the four-way connector 7. A gas probe inside the first air chamber 5 detects the mixed gas. Simultaneously, the mixed gas continues to flow into the second air chamber 6, where a gas probe detects the mixed gas. The mixed gas is then discharged from the sealed wall gas monitoring outlet 20. 20 seconds after the first air pump 1 is activated, the data detected by the probes in the first and second air chambers 5 and 6 are directly uploaded to the host computer software via the basic function board 24 on the circuit board (ensuring the first 20 seconds that the mixed gas fills both the first and second air chambers 5 and 6). After the data is uploaded, the first air pump 1 automatically shuts off, and the second air pump 2 sequentially starts, beginning extraction from inside the sealed wall. The gas flows from the second gas-water separator 4 through the four-way connector 7 into the first gas chamber 5 and the second gas chamber 6. At this time, the gas probes in the first gas chamber 5 and the second gas chamber 6 begin to detect, but the data is not uploaded. After the second air pump 2 is turned on for 20 seconds, the monitoring data is uploaded to the host computer software. During the first 20 seconds, the mixed gas extracted by the second air pump 2 from the sealed wall is mainly used to discharge the remaining mixed gas in the first gas chamber 5 and the second gas chamber 6. The discharged mixed gas is discharged back into the sealed wall through the external air pipe. Subsequently, according to the set interval time, the device automatically starts monitoring. The detection process is the same as the above process. Throughout the process, the differential pressure chip 8, the first platinum resistance temperature probe 11, and the second platinum resistance temperature probe 12 monitor the pressure difference and temperature changes inside and outside the sealed wall in real time and upload the monitored data in real time.
[0052] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.
Claims
1. A device for monitoring environmental parameters inside and outside a confined area in a coal mine, characterized in that: It includes a control module, a gas delivery module, a gas detection module, and a housing; The control module is located inside the outer casing. The gas delivery module includes a first air pump (1), a second air pump (2), a first gas-water separator (3), a second gas-water separator (4), an internal gas pipe, and an external gas pipe located outside the outer casing. One end of the first air pump (1) is connected to the first gas-water separator (3) for extracting gas outside the sealed wall, and the other end of the first air pump (1) is connected to the gas detection module. One end of the second air pump (2) is connected to the second gas-water separator (4) for extracting gas inside the sealed wall, and the other end of the second air pump (2) is connected to the gas detection module. The gas detection module includes a first gas chamber (5) and a second gas chamber (6) located inside the outer shell, a differential pressure chip (8), and a first platinum resistance temperature probe (11) and a second platinum resistance temperature probe (12) located outside the outer shell. The first gas chamber (5) contains multiple gas probes for detecting the concentration of each component in the mixed gas. The second gas chamber (6) contains an H2S gas probe for detecting the concentration of H2S in the mixed gas. The differential pressure chip (8) is used to monitor the differential pressure change inside and outside the sealed wall in real time, and the first platinum resistance temperature probe (11) and the second platinum resistance temperature probe (12) are used to monitor the temperature change inside and outside the sealed wall in real time. The outer casing is provided with a gas monitoring inlet (14) outside the sealed wall, a gas monitoring inlet (15) inside the sealed wall, and a pressure monitoring inlet (16) inside the sealed wall. One end of the gas monitoring inlet (14) outside the sealed wall is connected to the first gas-water separator (3), and the other end of the gas monitoring inlet (14) outside the sealed wall is connected to the external environment of the sealed wall. One end of the gas monitoring inlet (15) inside the sealed wall is connected to the second gas-water separator (4), and the other end of the gas monitoring inlet (15) inside the sealed wall is connected to the internal environment of the sealed wall. One end of the pressure monitoring inlet (16) inside the sealed wall is connected to the differential pressure chip (8), and the other end of the pressure monitoring inlet (16) inside the sealed wall is connected to the internal environment of the sealed wall.
2. The device for monitoring environmental parameters inside and outside a confined area in a coal mine as described in claim 1, characterized in that: The control module is provided with a first air pump control board (25) for controlling the start and stop of the first air pump (1) and a second air pump control board (26) for controlling the start and stop of the second air pump (2).
3. The device for monitoring environmental parameters inside and outside a confined area in a coal mine as described in claim 1, characterized in that: The control module is equipped with a Bluetooth transceiver module (28) that controls the start and stop of the first air pump (1) and the second air pump (2) by connecting to an external mobile device via Bluetooth.
4. The device for monitoring environmental parameters inside and outside a confined area in a coal mine as described in claim 1, characterized in that: The control module is equipped with a timer (27) for timing the start and stop of the first air pump (1) and the second air pump (2).
5. The device for monitoring environmental parameters inside and outside a confined area in a coal mine as described in claim 1, characterized in that: The first gas chamber (5) is connected to the second gas chamber (6). A one-way valve is provided between the first gas chamber (5) and the second gas chamber (6) to ensure that the mixed gas can only flow from the first gas chamber (5) to the second gas chamber (6).
6. The device for monitoring environmental parameters inside and outside a confined area in a coal mine as described in claim 1, characterized in that: The first gas chamber (5) contains a CO gas probe, a CO2 gas probe, an O2 gas probe and a CH4 gas probe.
7. A monitoring method based on a monitoring device for environmental parameters inside and outside a confined area in a coal mine as described in claim 1, characterized in that, Includes the following steps: Step 1: Select working mode: Based on the three working modes of the monitoring device for environmental parameters inside and outside the closed area of the coal mine, namely, the mode of only sampling inside the wall, the mode of only sampling outside the wall, and the mode of sampling inside and outside the wall. The mode of only sampling inside the wall corresponds to the action of the second air pump (2), the mode of only sampling outside the wall corresponds to the action of the first air pump (1), and the mode of sampling inside and outside the wall corresponds to the continuous action of the first air pump (1) and the second air pump (2). After selecting the working mode, the detection cycle time of the timer (27) is set through the host computer software or mobile terminal Bluetooth. Step 2, Install the device: Connect the gas monitoring inlet (14) outside the sealed wall, the gas monitoring inlet (15) inside the sealed wall, and the pressure monitoring inlet (16) inside the sealed wall to the gas monitoring inlet (15) inside the sealed wall and the pressure monitoring inlet (16) inside the sealed wall respectively with external air pipes. The external air pipe connecting the gas monitoring inlet (14) outside the sealed wall is placed outside the sealed wall. Step 3, Gas Extraction and Detection: The pumps in the three working modes of the device are in different states. In the mode of extracting only inside the wall, only the second air pump (2) is turned on, and the device extracts and detects the gas in the environment inside the wall. In the mode of extracting only outside the wall, only the first air pump (1) is turned on, and the device extracts and detects the gas in the environment outside the wall. In the mode of extracting both inside and outside the wall, the first air pump (1) and the second air pump (2) are turned on in sequence to detect the gas inside and outside the wall. In the three working modes, the differential pressure chip (8), the first platinum resistance temperature probe (11), and the second platinum resistance temperature probe (12) are all in working state to monitor the differential pressure and temperature changes inside and outside the sealed wall in real time, and the monitoring data is uploaded to the host computer software in real time.
8. The monitoring method as described in claim 7, characterized in that: When the working mode selected in step 1 is the wall-only pumping mode, the specific steps of step 3 are as follows: the second air pump (2) is turned on by the host computer software or the mobile terminal via Bluetooth. After the second air pump (2) is turned on, it starts to pump air from inside the sealed wall. The mixed gas flows through the second gas-water separator (4) for filtration and then enters the first air chamber cavity (5). The gas probe in the first air chamber cavity (5) detects the mixed gas. At the same time, the mixed gas continues to flow to the second air chamber cavity (6). The gas probe in the second air chamber cavity (6) detects the mixed gas. The mixed gas is then discharged from the sealed wall gas monitoring outlet (20) on the outer shell. After the second air pump (2) is turned on for a period of time, the data detected by the probes in the first air chamber cavity (5) and the second air chamber cavity (6) is directly uploaded to the host computer software by the control module. After the data is uploaded, the second air pump (2) is automatically turned off.
9. The monitoring method as described in claim 7, characterized in that: When the working mode selected in step 1 is the external wall extraction mode, the specific steps of step 3 are as follows: the first air pump (1) is turned on by the host computer software or the mobile terminal Bluetooth control. After the first air pump (1) is turned on, it starts to extract air from outside the sealed wall. The mixed gas flows through the first gas-water separator (3) for filtration and enters the first air chamber cavity (5). The gas probe in the first air chamber cavity (5) detects the mixed gas. At the same time, the mixed gas continues to flow to the second air chamber cavity (6). The gas probe in the second air chamber cavity (6) detects the mixed gas. The mixed gas is then discharged from the sealed wall gas monitoring outlet (20) on the outer shell. After the first air pump (1) is turned on for a period of time, the data detected by the probes in the first air chamber cavity (5) and the second air chamber cavity (6) is directly uploaded to the host computer software by the control module. After the data is uploaded, the first air pump (1) is automatically turned off.
10. The monitoring method as described in claim 7, characterized in that: When the working mode selected in step 1 is the combined wall and outside extraction mode, the specific steps of step 3 are as follows: The first air pump (1) is started by the host computer software or mobile terminal Bluetooth control. After the first air pump (1) is started, the gas is extracted from outside the sealed wall. The mixed gas flows through the first gas-water separator (3) for filtration and enters the first gas chamber cavity (5). The gas probe in the first gas chamber cavity (5) detects the mixed gas. At the same time, the mixed gas continues to flow to the second gas chamber cavity (6). The gas probe in the second gas chamber cavity (6) detects the mixed gas. The subsequent mixing... Gas is discharged from the gas monitoring outlet (20) on the sealed wall of the outer shell. After the first air pump (1) is turned on for a period of time, the data monitored by the probes in the first air chamber (5) and the second air chamber (6) is directly uploaded to the host computer software by the control module. After the data is uploaded, the first air pump (1) is automatically turned off, and the second air pump (2) is turned on in sequence. Gas is drawn from the sealed wall. The mixed gas flows from the second gas-water separator (4) to the first air chamber (5) and the second air chamber (6). After the second air pump (2) is turned on for a period of time, the monitoring data is uploaded to the host computer software.