Device and method for monitoring internal and external environmental parameters of closed area under coal mine

Abstract

The invention discloses a device and a method for monitoring internal and external environmental parameters of an underground coal mine closed area. The device is provided with a control module, a gas conveying module, a gas detection module and a shell, the gas conveying module comprises a first gas pump, a second gas pump, a first gas-water separator and a second gas-water separator; one end of the first gas pump is connected with the first gas-water separator, and the other end is connected with the gas detection module; one end of the second gas pump is connected with the second gas-water separator, and the other end is connected with the gas detection module; the gas detection module comprises a first gas chamber cavity, a second gas chamber cavity and a differential pressure chip; a plurality of gas probes are arranged in the cavity of the first gas chamber; an H2S gas probe is arranged in the cavity of the second gas chamber; the shell is provided with a closed wall outside gas monitoring inlet, a closed wall inside gas monitoring inlet and a closed wall inside pressure monitoring inlet. The device and the method can improve the effectiveness and the accuracy of monitoring the internal and external environments of the underground closed area of the coal mine, and meanwhile, the effects of reducing cost and improving efficiency are achieved.

Description

Technical Field

[0001] The present invention relates to a technical field particularly suitable for automatic monitoring of mixed gas, temperature and differential pressure inside and outside a closed area in underground coal mines, and in particular to a device and method for monitoring environmental parameters inside and outside a closed area in underground coal mines. Background Art

[0002] Most of the closed areas in coal mines are goaf closed areas formed by artificial closure after the end of the working face mining. There are also temporary or permanent closed areas set up for other reasons. The daily management and monitoring of closed areas in coal mines is an indispensable part of the coal mine production process. The traditional monitoring method of closed areas in coal mines is mainly based on artificial air extraction well detection or bundle pipe air extraction detection. The traditional method has problems such as high cost, long time consumption and low efficiency. These problems seriously restrict the real-time and effectiveness of the internal and external environmental monitoring of closed areas in coal mines, resulting in the monitoring data basically unable to reflect the actual status of the closed 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] To this end, the present invention proposes a device and method for monitoring environmental parameters inside and outside the confined area of ​​an underground coal mine, which can improve the effectiveness and accuracy of environmental monitoring inside and outside the confined area of ​​an underground coal mine, while playing a role in reducing costs and increasing efficiency.

[0005] According to an embodiment of the present invention, the device for monitoring environmental parameters inside and outside the closed area of ​​an underground coal mine is provided with a control module, a gas delivery module, a gas detection module and a shell; the control module is located on the inner side of the shell, and 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 air pipe and an external air pipe located on the outer side of the shell; one end of the first air pump is connected to the first gas-water separator for extracting gas outside the closed 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 closed wall, and the other end of the second air pump is connected to the gas detection module; the gas detection module includes a first air chamber cavity, a second air chamber cavity, a differential pressure chip and a first platinum resistance temperature probe and a second platinum resistance temperature probe located on the outer side of the shell; the first air chamber cavity contains A variety of gas probes are used to detect the concentration of each component in the mixed gas; the second gas chamber cavity contains an H2S gas probe for detecting the concentration of H2S in the mixed gas; the differential pressure chip is used to monitor the differential pressure changes inside and outside the closed wall in real time, and the first platinum resistance temperature probe and the second platinum resistance temperature probe are used to monitor the temperature changes inside and outside the closed wall in real time; the shell is provided with a gas monitoring inlet outside the closed wall, a gas monitoring inlet inside the closed wall and a pressure monitoring inlet inside the closed wall; one end of the gas monitoring inlet outside the closed wall is connected to the first gas-water separator, and the other end of the gas monitoring inlet outside the closed wall is connected to the external environment of the closed wall; one end of the gas monitoring inlet inside the closed wall is connected to the second gas-water separator, and the other end of the gas monitoring inlet inside the closed wall is connected to the internal environment of the closed wall; one end of the pressure monitoring inlet inside the closed wall is connected to the differential pressure chip, and the other end of the pressure monitoring inlet inside the closed wall is connected to the internal environment of the closed wall.

[0006] According to an embodiment of the present invention, a method for monitoring environmental parameters inside and outside a closed area in a coal mine comprises the following steps:

[0007] Step 1, select the working mode: based on the three working modes corresponding to the environmental parameter monitoring device inside and outside the confined area of ​​the coal mine underground, they are the wall-only pumping mode, the wall-only pumping mode and the wall-inside and wall-side pumping mode. Among them, the wall-only pumping mode corresponds to the action of the second air pump, the wall-only pumping mode corresponds to the action of the first air pump, and the wall-inside and wall-side pumping mode corresponds to the first air pump and the second air pump. After selecting the working mode, the detection patrol time of the timer is set through the upper computer software or the mobile terminal Bluetooth;

[0008] Step 2, installing the device: respectively connect the gas monitoring inlet outside the closed wall, the gas monitoring inlet inside the closed wall, and the pressure monitoring inlet inside the closed wall with external gas pipes, wherein the external gas pipes connected to the gas monitoring inlet inside the closed wall and the pressure monitoring inlet inside the closed wall extend into the closed wall, and the external gas pipes connected to the gas monitoring inlet outside the closed wall are placed outside the closed wall;

[0009] Step 3: Air extraction detection: In the three working modes, the corresponding pumps are turned on in different states. In the mode of only extracting air inside the wall, only the second air pump is turned on, and the device performs air extraction detection on the ambient gas inside the wall; in the mode of only extracting air outside the wall, only the first air pump is turned on, and the device performs air extraction detection on the ambient gas outside the wall; in the mode of extracting air from both inside and outside the wall, the first air pump and the second air pump are turned on sequentially to detect the gas inside and outside the wall in turn; the differential pressure chip, the first platinum resistance temperature probe, and the second platinum resistance temperature probe in the three working modes are all in working state to monitor the differential pressure and temperature changes inside and outside the closed wall in real time, and the monitoring data are uploaded to the host computer software in real time.

[0010] The beneficial effect of the present invention is to improve the accuracy and speed of environmental monitoring inside and outside the closed area of ​​the coal mine, which specifically includes the following advantages:

[0011] 1. Traditional monitoring of the environment inside and outside the closed wall requires manual underground gas extraction and surface testing, which is time-consuming and labor-intensive. The device and method for monitoring the environmental parameters inside and outside the closed area of ​​a coal mine in the present invention can realize automatic detection of data inside and outside the closed wall, and automatically upload the data after the detection is completed;

[0012] 2. Most of the existing automatic monitoring devices for the environment of closed areas can only detect the mixed gas in one environment within the closed wall, and most of them are not compatible with differential pressure monitoring. The device for monitoring the environmental parameters inside and outside the closed area of ​​the coal mine underground of the present invention contains a double pump, which can automatically monitor the parameters inside and outside the closed wall. At the same time, a large-range high-precision differential pressure chip is embedded, which can monitor the differential pressure inside and outside the closed wall.

[0013] 3. The device and method for monitoring environmental parameters inside and outside the closed area of ​​an underground coal mine of the present invention has an exhaust port that is directly connected to the closed wall, and the detected gas is discharged back into the closed wall through the exhaust port, ensuring that the toxic and harmful gas extracted from the closed 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 terminal Bluetooth.

[0016] According to one embodiment of the present invention, the control module is provided with a timer for timing control of starting and stopping the first air pump and the second air pump.

[0017] According to one embodiment of the present invention, the first air chamber cavity is connected to the second air chamber cavity, and a one-way valve is provided between the first air chamber cavity and the second air chamber cavity to ensure that the mixed gas can only flow from the first air chamber cavity to the second air chamber cavity.

[0018] According to one embodiment of the present invention, the first gas chamber cavity 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 pumping mode, the specific steps of step 3 are: the second air pump is controlled to start by the host computer software or the mobile terminal Bluetooth. After the second air pump is turned on, air is pumped from the closed wall. The mixed gas flows through the second gas-water separator and enters the first air chamber cavity after being filtered. The gas probe in the first air chamber cavity detects the mixed gas. At the same time, the mixed gas continues to flow to the second air chamber cavity. The gas probe in the second air chamber cavity detects the mixed gas. The subsequent mixed gas is discharged from the closed wall gas monitoring outlet on the outer shell. After the second air pump is turned on for a period of time, the data monitored by the probes in the first air chamber cavity and the second air chamber cavity are 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 mode of only pumping outside the wall, the specific steps of step 3 are: the first air pump is controlled by the upper computer software or the mobile terminal Bluetooth to start pumping air. After the first air pump is turned on, air is pumped from outside the closed wall. The mixed gas flows through the first gas-water separator and enters the first air chamber cavity after being filtered. The gas probe in the first air chamber cavity detects the mixed gas. At the same time, the mixed gas continues to flow to the second air chamber cavity, and the gas probe in the second air chamber cavity detects the mixed gas. The subsequent mixed gas is discharged from the closed wall gas monitoring outlet on the outer shell. After the first air pump is turned on for a period of time, the data monitored by the probes in the first air chamber cavity and the second air chamber cavity are directly uploaded to the upper computer software by the control module. After the data is uploaded, the first air pump is automatically turned off.

[0021] According to one embodiment of the present invention, when the working mode selected in step 1 is the wall inside and outside combined extraction mode, the specific steps of step 3 are: the host computer software or the mobile terminal Bluetooth controls the first air pump to start exhaust. After the first air pump is turned on, exhaust begins from outside the closed wall, and the mixed gas flows through the first gas-water separator and enters the first air chamber cavity after filtration. The gas probe in the first air chamber cavity detects the mixed gas, and at the same time, the mixed gas continues to flow to the second air chamber cavity, and the gas probe in the second air chamber cavity detects the mixed gas. The subsequent mixed gas is discharged from the closed wall gas monitoring outlet on the outer shell. After the first air pump is turned on for a period of time, the data monitored by the probes in the first air chamber cavity and the second air chamber cavity are directly uploaded to the host computer software by the control module. After the data is uploaded, the first air pump is automatically turned off, and the second air pump is turned on sequentially to start exhaust from inside the closed wall. The mixed gas flows from the second gas-water separator to the first air chamber cavity and the second air chamber cavity. After the second air pump 2 is turned on for a period of time, the monitoring data is uploaded to the host computer software.

[0022] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a schematic diagram of the structure of the device for monitoring the environmental parameters inside and outside the closed area of ​​a coal mine underground according to the present invention;

[0026] Figure 2 It is a measurement schematic diagram of the device for monitoring environmental parameters inside and outside the closed area of ​​an underground coal mine according to the present invention.

[0027] The numbers in the figure are: 1, first air pump; 2, second air pump; 3, first air-water separator; 4, second air-water separator; 5, first air chamber cavity; 6, second air chamber cavity; 7, four-way piece; 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 breathable plug; 14, gas monitoring entrance outside the closed wall; 15, gas monitoring entrance inside the closed wall; 16. Pressure monitoring entrance inside the closed wall; 17. Monitoring entrance outside the first platinum resistor wall; 18. Monitoring entrance inside the second platinum resistor wall; 19. Non-hydrogen sulfide gas calibration entrance; 20. Gas monitoring outlet of the closed wall; 21. Hydrogen sulfide gas calibration entrance; 22. Sound and light alarm; 23. Power supply 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 DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by the terms “one side”, “the other side”, “both sides”, “between”, “middle”, “upper end”, “lower end”, etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] The following describes in detail the device and method for monitoring environmental parameters inside and outside the closed area of ​​a coal mine according to an embodiment of the present invention with reference to the accompanying drawings.

[0032] See Figure 1 and Figure 2The device for monitoring the environmental parameters inside and outside the closed area of ​​an underground coal mine (hereinafter referred to as the device) of the present invention is mainly composed of four parts: a control module, a gas delivery module, a gas detection module, and a shell.

[0033] The control module is located on the inner side of the housing, and is provided with a first air pump control panel 25 for controlling the start and stop of the first air pump 1 and a second air pump control panel 26 for controlling the start and stop of the second air pump 2. The control module is provided with a Bluetooth transceiver module 28 for controlling the start and stop of the first air pump 1 and the second air pump 2 by connecting to an external mobile terminal Bluetooth. The control module is provided with a timer 27 for timing control of the start and stop of the first air pump 1 and the start and stop of the second air pump 2.

[0034] Specifically, the control module is a circuit board embedded in the inner side of the shell, and the circuit board is embedded with a first air pump control board 25. The first air pump control board 25 is used to receive signals and send signals to the controller in 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 in the circuit board. The second air pump control board 26 is used to receive signals and send signals to the controller in the second air pump 2, thereby controlling the start and stop of the second air pump 2. A Bluetooth transceiver module 28 is embedded in the circuit board, and the start and stop of the first air pump 1 and the start and stop of the second air pump 2 can be controlled respectively by an external mobile terminal Bluetooth connection. A timer 27 is embedded in the circuit board, and the time can be set by the host computer software, Bluetooth, etc., to control the start and stop of the first air pump 1 and the second air pump 2 at a fixed time. The circuit board is embedded with a basic function board 24 for maintaining the normal operation of the device.

[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 air pipe, an external air pipe and a four-way piece 7. The first air pump 1, the second air pump 2, the first gas-water separator 3, the internal air pipe, the second gas-water separator 4 and the four-way piece 7 are all located on the inner side of the shell, and the external air pipe is located on the outer side of the shell. One end of the first air pump 1 is connected to the first gas-water separator 3 for extracting gas outside the closed 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 closed 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, which can control the start and stop of the first air pump 1. The controller is controlled by Bluetooth and a signal transmission line (the signal transmission line corresponds to the upper computer software). One end of the first air pump 1 is connected to the first gas-water separator 3 through an internal air pipe for extracting gas outside the closed wall, and the other end of the first air pump 1 is connected to the gas detection module through a four-way piece 7. The first gas-water separator 3 is used to filter the gas extracted from the outside of the closed wall by the first air pump 1, and the separated water is discharged from the water outlet 29. The second air pump 2 has the same functional structure as the first air pump 1, but the second air pump 2 is connected to the second gas-water separator 4 for extracting gas inside the closed wall, and the other end of the second air pump 2 is connected to the gas detection module through a four-way piece 7. The second gas-water separator 4 is used to filter the gas extracted from the closed wall by the second air pump 2, and the separated water is discharged from the water outlet. The internal air pipe is used to transport gas inside the device. The external air pipe is used to transport gas extracted from the outside and inside the closed wall by the first air pump 1 and the second air pump 2. The four-way piece 7 is responsible for transmitting the gas outside the closed wall and inside the closed wall extracted by the first air pump 1 and the second air pump 2 to the gas detection module.

[0037] The gas detection module includes a first gas chamber cavity 5, a second gas chamber cavity 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. Among them, the first gas chamber cavity 5, the second gas chamber cavity 6, the differential pressure chip 8, the first temperature interface 9 and the second temperature interface 10 are all located on the inner side of the shell, and the first platinum resistance temperature probe 11 and the second platinum resistance temperature probe 12 are both located on the outer side of the shell. The first gas chamber cavity 5 contains a variety of gas probes for detecting the concentration of each component in the mixed gas; the second gas chamber cavity 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 closed 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 closed wall in real time. The first air chamber cavity 5 is connected to the second air chamber cavity 6 , and a one-way valve is arranged between the first air chamber cavity 5 and the second air chamber cavity 6 to ensure that the mixed gas can only flow from the first air chamber cavity 5 to the second air chamber cavity 6 .

[0038] Specifically, the first gas chamber cavity 5 contains multiple gas probes such as CO, CO2, O2, and CH4, that is, the first gas chamber cavity 5 contains multiple gas probes such as CO gas probe, CO2 gas probe, O2 gas probe, and CH4 gas probe. Multiple gas probes can accurately detect the concentration of each component in the mixed gas. It should be noted that the multiple gas probes do not include H2S gas probes. The second gas chamber cavity 6 only contains H2S gas probes, which are used to detect the concentration of H2S in the mixed gas. The first gas chamber cavity 5 and the second gas chamber cavity 6 are connected by an internal air pipe, and a one-way valve is configured at the connection between the internal air pipe and the second gas chamber cavity 6. The setting of the one-way valve can ensure that the mixed gas can only flow from the first gas chamber cavity 5 to the second gas chamber cavity 6, and cannot flow back. This design is intended to ensure that when the H2S gas probe is calibrated, high-concentration H2S gas will not flow to the first gas chamber cavity 5, thereby not interfering with the accuracy of concentration detection of other gas probes. The differential pressure chip 8 is connected to two interfaces, one of which is connected to the closed wall pressure monitoring inlet 16 on the shell through the internal air pipe, and the closed wall pressure monitoring inlet 16 is connected to the external air pipe, and the external air pipe extends into the closed wall. The other interface is not connected to the internal air pipe and directly contacts the internal environment of the device. The device shell is provided with a waterproof breathable plug 13 to ensure that the internal environmental pressure of the device shell is the same as that of the outside. The first platinum resistance temperature probe 11 is connected to the first temperature interface 9, and the first platinum resistance temperature probe 11 passes through the first platinum resistance wall monitoring inlet 17 on the shell, and the first platinum resistance temperature probe 11 is placed outside the closed wall to monitor the ambient temperature outside the closed wall. The second platinum resistance temperature probe 12 is connected to the second temperature interface 10, and the second platinum resistance temperature probe 12 passes through the second platinum resistance wall monitoring inlet 18 on the shell, and the second platinum resistance temperature probe 12 is extended into the closed wall to monitor the ambient temperature inside the closed wall. 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 shell is provided with a gas monitoring inlet 14 outside the closed wall, a gas monitoring inlet 15 inside the closed wall and a pressure monitoring inlet 16 inside the closed wall; one end of the gas monitoring inlet 14 outside the closed wall is connected to the first gas-water separator 3, and the other end of the gas monitoring inlet 14 outside the closed wall is connected to the external environment of the closed wall; one end of the gas monitoring inlet 15 inside the closed wall is connected to the second gas-water separator 4, and the other end of the gas monitoring inlet 15 inside the closed wall is connected to the internal environment of the closed wall; one end of the pressure monitoring inlet 16 inside the closed wall is connected to the differential pressure chip 8, and the other end of the pressure monitoring inlet 16 inside the closed wall is connected to the internal environment of the closed wall.

[0040] Specifically, the shell is a stainless steel protective shell, and the shell is provided with a closed wall external gas monitoring inlet 14 (through the board quick plug), a closed wall internal gas monitoring inlet 15 (through the board quick plug), a closed wall internal pressure monitoring inlet 16 (through the board quick plug), a first platinum resistor external wall monitoring inlet 17 (waterproof joint), a second platinum resistor internal wall monitoring inlet 18 (waterproof joint), a non-hydrogen sulfide gas calibration inlet 19 (through the board quick plug), a closed wall gas monitoring outlet 20 (through the board quick plug), a hydrogen sulfide gas calibration inlet 21 (through the board quick plug), an audible and visual alarm 22, a power port 23, and a waterproof breathable plug 13. Among them, the closed wall external gas monitoring inlet 14 is internally connected to the first gas-water separator 3 and externally connected to the external air pipe, and the external air pipe is connected to the external environment of the closed wall. The closed wall internal gas monitoring inlet 15 is internally connected to the second gas-water separator 4 and externally connected to the external air pipe, and the external air pipe extends into the closed wall. The pressure monitoring inlet 16 inside the closed wall is connected to the differential pressure chip 8, and is connected to the external air pipe outside, and the external air pipe extends into the closed wall. The first platinum resistance wall external monitoring inlet 17 is used for the first platinum resistance probe connected to the first temperature interface 9 to pass through and be placed outside the closed wall. The second platinum resistance wall internal monitoring inlet 18 is used for the second platinum resistance probe connected to the second temperature interface 10 to pass through and extend into the closed wall. The non-hydrogen sulfide gas calibration inlet 19 is used for calibrating the gas probe in the first gas chamber cavity 5. It is in a sealed state during non-calibration. 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 the internal air pipe, and the gas is diffused into the first gas chamber cavity 5 through the four-way piece 7 to calibrate the gas probe. The closed wall gas monitoring outlet 20 is connected to the external air pipe extending into the closed wall during normal monitoring of the device, and is connected to the second air chamber cavity 6 through the internal air pipe. The detected gas is discharged back into the closed wall through the closed wall gas monitoring outlet 20 to prevent the leakage of harmful gas. During calibration, the gas after calibration is also discharged from the closed wall gas monitoring outlet 20 for separate collection. The hydrogen sulfide gas calibration inlet 21 is used for calibration of the H2S probe in the second air chamber cavity 6. When in use, the gas outlet of the H2S gas calibration bottle is connected to the hydrogen sulfide gas calibration inlet 21. The hydrogen sulfide gas calibration inlet 21 is directly connected to the second air chamber cavity 6 through the internal air pipe. The sound and light alarm 22 is used to sound and light alarm when the gas concentration exceeds the limit. The power port 23 is used to connect the power supply. The waterproof breathable plug 13 is used to balance the pressure inside and outside the device.

[0041] See Figure 1 and Figure 2 The method for monitoring environmental parameters inside and outside the closed area of ​​a coal mine according to the present invention comprises the following steps:

[0042] Step 1, select the working mode: based on the three working modes corresponding to the environmental parameter monitoring device inside and outside the confined area of ​​the coal mine underground, they are the wall-only pumping mode, the wall-only pumping mode and the wall-inside and wall-side pumping mode. Among them, the wall-only pumping mode corresponds to the action of the second air pump 2, the wall-only pumping mode corresponds to the action of the first air pump 1, and the wall-inside and wall-side pumping mode corresponds to the action of the first air pump 1 and the second air pump 2. After selecting the working mode, set the detection patrol time for the timer 27 through the upper computer software or the mobile terminal Bluetooth;

[0043] Step 2, installing the device: respectively connect the gas monitoring inlet 14 outside the closed wall, the gas monitoring inlet 15 inside the closed wall, and the pressure monitoring inlet 16 inside the closed wall with external gas pipes, wherein the external gas pipes connected to the gas monitoring inlet 15 inside the closed wall and the pressure monitoring inlet 16 inside the closed wall extend into the closed wall, and the external gas pipe connected to the gas monitoring inlet 14 outside the closed wall is placed outside the closed wall;

[0044] Step 3, air extraction detection: the device has three working modes, and the corresponding pumps are turned on in different states. In the mode of only extracting air inside the wall, only the second air pump 2 is turned on, and the device performs air extraction detection on the ambient gas inside the wall; in the mode of only extracting air outside the wall, only the first air pump 1 is turned on, and the device performs air extraction detection on the ambient gas outside the wall; in the mode of extracting air inside and outside the wall, the first air pump 1 and the second air pump 2 are turned on sequentially to detect the gas inside and outside the wall in turn; the differential pressure chip 8, the first platinum resistance temperature probe 11, and the second platinum resistance temperature probe 12 in the three working modes are all in working state to monitor the differential pressure and temperature changes inside and outside the closed wall in real time, and the monitoring data are uploaded to the host computer software in real time.

[0045] When the working mode selected in step 1 is the wall-only pumping mode, the specific steps of step 3 are: the second air pump 2 is controlled to start by the host computer software or the mobile terminal Bluetooth. After the second air pump 2 is turned on, air is pumped from the closed wall, and the mixed gas flows through the second gas-water separator 4 and is filtered into 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, and the gas probe in the second air chamber cavity 6 detects the mixed gas. The subsequent mixed gas is discharged from the closed 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 monitored by the probes in the first air chamber cavity 5 and the second air chamber cavity 6 are 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 mode of only pumping outside the wall, the specific steps of step 3 are: the first air pump 1 is controlled by the host computer software or the mobile terminal Bluetooth to start pumping. After the first air pump 1 is turned on, it starts to pump air from outside the closed wall, and the mixed gas flows through the first gas-water separator 3 and enters the first air chamber cavity 5 after being filtered. 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, and the gas probe in the second air chamber cavity 6 detects the mixed gas. The subsequent mixed gas is discharged from the closed 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 monitored by the probes in the first air chamber cavity 5 and the second air chamber cavity 6 are 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 wall internal and external extraction mode, the specific steps of step 3 are: the upper computer software or the mobile terminal Bluetooth controls the first air pump 1 to start exhaust. After the first air pump 1 is turned on, exhaust begins from outside the closed wall. The mixed gas flows through the first gas-water separator 3 and enters the first air chamber cavity 5 after filtration. 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 subsequent mixed gas is discharged from the closed 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 monitored by the probes in the first air chamber cavity 5 and the second air chamber cavity 6 are directly uploaded to the upper computer software by the control module. After the data is uploaded, the first air pump 1 is automatically closed, and the second air pump 2 is sequentially turned on to start exhaust from the closed wall. The mixed gas flows from the second gas-water separator 4 to the first air chamber cavity 5 and the second air chamber cavity 6. After the second air pump 2 is turned on for a period of time, the monitoring data is uploaded to the upper computer software.

[0048] Specifically, the method for monitoring environmental parameters inside and outside the closed area of ​​a coal mine comprises the following steps:

[0049] The first step is to select the working mode: based on the three working modes corresponding to the environmental parameter monitoring device inside and outside the confined area of ​​the coal mine, they are the wall-only pumping mode, the wall-only pumping mode and the wall-both inside and outside pumping mode. The wall-only pumping mode corresponds to the action of the second air pump 2, the wall-only pumping mode corresponds to the action of the first air pump 1, and the wall-both inside and outside pumping mode corresponds to the first air pump 1 and the second air pump 2 in succession. After selecting the working mode, set the detection patrol time for the timer 27 through the upper computer software or the mobile terminal Bluetooth. The time intervals that can be set for the timer 27 are normally open, 15 minutes, 30 minutes, 1 hour, 8 hours, 24 hours, 72 hours. If the interval time is set to 15 minutes, the device will automatically start detection every 15 minutes, and the device will be in sleep mode for the rest of the time. However, it can also be actively awakened by the host computer software or mobile Bluetooth to perform air extraction detection during sleep mode, which will not affect the interval time. Subsequently, the alarm limits of different parameters can be set separately through the basic function board 24. When any one or more of the monitored parameters exceed the set limit, the basic function board 24 triggers the sound and light alarm 22 to sound and light alarm.

[0050] In the second step, use external air pipes to connect the gas monitoring inlet 14 outside the closed wall, the gas monitoring inlet 15 inside the closed wall, and the pressure monitoring inlet 16 inside the closed wall, wherein the external air pipe connecting the gas monitoring inlet 15 inside the closed wall and the pressure monitoring inlet 16 inside the closed wall extends into the interior of the closed wall, and the external air pipe connecting the gas monitoring inlet 14 outside the closed wall is placed outside the closed wall. At the same time, the first platinum resistance temperature probe 11 is placed outside the closed wall, and the second platinum resistance temperature probe 12 extends into the closed 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, take the mode of pumping inside and outside the wall as an example. The upper computer software or mobile terminal Bluetooth controls the first air pump 1 to start pumping. The first air pump 1 and the second air pump 2 cannot be turned on at the same time. After the first air pump 1 is turned on, air is pumped from outside the closed wall. The mixed gas flows through the first gas-water separator 3 and is filtered and then enters the first air chamber cavity 5 through the four-way piece 7. 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 subsequent mixed gas is discharged from the closed wall gas monitoring outlet 20. After the first air pump 1 is turned on for 20s, the data monitored by the probes in the gas cavity 1 and the second air chamber cavity 6 are directly uploaded to the upper computer software by the basic function board 24 on the circuit board (the first 20 seconds ensure that the mixed gas fills the first air chamber cavity 5 and the second air chamber cavity 6). 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 to start pumping from the closed wall. The mixed gas The gas flows from the second gas-water separator 4 through the four-way piece 7 to the first air chamber cavity 5 and the second air chamber cavity 6. At this time, the gas probes in the first air chamber cavity 5 and the second air chamber cavity 6 start to detect but the data is not uploaded. The monitoring data is uploaded to the host computer software 20 seconds after the second air pump 2 is turned on. During the first 20 seconds, the mixed gas drawn from the closed wall by the second air pump 2 is mainly used to discharge the remaining mixed gas in the first air chamber cavity 5 and the second air chamber cavity 6. The discharged mixed gas is discharged back to the inside of the closed wall through the external air pipe. Subsequently, according to the set interval time, the device automatically starts monitoring. The detection process is consistent with the above process. During the whole 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 closed wall in real time, and upload the monitored data in real time.

[0052] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for monitoring environmental parameters inside and outside the closed area of ​​a coal mine, characterized in that: It has a control module, a gas delivery module, a gas detection module and a housing; The control module is located on the inner side of the shell, and the gas delivery module comprises a first air pump (1) located on the inner side of the shell, a second air pump (2), a first gas-water separator (3), a second gas-water separator (4), an internal air pipe and an external air pipe located on the outer side of the shell; one end of the first air pump (1) is connected to the first gas-water separator (3) for extracting gas outside the closed 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 closed wall, and the other end of the second air pump (2) is connected to the gas detection module; The gas detection module comprises a first gas chamber cavity (5), a second gas chamber cavity (6), a differential pressure chip (8) located on the inner side of the shell, and a first platinum resistance temperature probe (11) and a second platinum resistance temperature probe (12) located on the outer side of the shell; the first gas chamber cavity (5) contains a plurality of gas probes for detecting the concentration of each component in the mixed gas; the second gas chamber cavity (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 closed 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 closed wall in real time; The housing 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) in the sealed wall is connected to the second gas-water separator (4), and the other end of the gas monitoring inlet (15) in the sealed wall is connected to the internal environment of the sealed wall; One end of the closed wall internal pressure monitoring inlet (16) is connected to the differential pressure chip (8), and the other end of the closed wall internal pressure monitoring inlet (16) is connected to the internal environment of the closed wall.

2. The device for monitoring environmental parameters inside and outside the closed area of ​​a coal mine as claimed in claim 1 is characterized in that: The control module is provided with a first air pump control panel (25) for controlling the start and stop of the first air pump (1) and a second air pump control panel (26) for controlling the start and stop of the second air pump (2).

3. The device for monitoring environmental parameters inside and outside the closed area of ​​a coal mine as claimed in claim 1 is characterized in that: The control module is provided with a Bluetooth transceiver module (28) for controlling the start and stop of the first air pump (1) and the start and stop of the second air pump (2) by connecting to an external mobile terminal Bluetooth.

4. The device for monitoring environmental parameters inside and outside the closed area of ​​a coal mine as claimed in claim 1, characterized in that: The control module is provided with a timer (27) for timing control of the start and stop of the first air pump (1) and the start and stop of the second air pump (2).

5. The device for monitoring environmental parameters inside and outside the closed area of ​​a coal mine as claimed in claim 1 is characterized in that: The first air chamber cavity (5) is connected to the second air chamber cavity (6), and a one-way valve is provided between the first air chamber cavity (5) and the second air chamber cavity (6) to ensure that the mixed gas can only flow from the first air chamber cavity (5) to the second air chamber cavity (6).

6. The device for monitoring environmental parameters inside and outside the closed area of ​​a coal mine as claimed in claim 1, characterized in that: The first gas chamber cavity (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 the device for monitoring environmental parameters inside and outside the closed area of ​​a coal mine as claimed in claim 1, characterized in that: The following steps are involved: Step 1, selecting a working mode: based on the fact that the environmental parameter monitoring device for the closed area inside and outside the coal mine underground corresponds to three working modes, namely, a pumping-inside-the-wall-only mode, a pumping-outside-the-wall-only mode, and a pumping-inside-the-wall-and-outside-the-wall-mode, wherein the pumping-inside-the-wall-only mode corresponds to the action of the second air pump (2), the pumping-outside-the-wall-only mode corresponds to the action of the first air pump (1), and the pumping-inside-the-wall-and-outside-the-wall-mode corresponds to the action of the first air pump (1) and the second air pump (2) in succession, after selecting the working mode, setting the detection patrol time for the timer (27) through the upper computer software or the mobile terminal Bluetooth; Step 2, installing the device: using external gas pipes to connect the gas monitoring inlet (14) outside the closed wall, the gas monitoring inlet (15) inside the closed wall, and the pressure monitoring inlet (16) inside the closed wall, respectively, wherein the external gas pipe connecting the gas monitoring inlet (15) inside the closed wall and the pressure monitoring inlet (16) inside the closed wall extends into the closed wall, and the external gas pipe connecting the gas monitoring inlet (14) outside the closed wall is placed outside the closed wall; Step 3, gas extraction detection: the device has three working modes, and the corresponding pumps are turned on in different states. In the mode of only extracting air inside the wall, only the second air pump (2) is turned on, and the device performs gas extraction detection on the ambient gas inside the wall; in the mode of only extracting air outside the wall, only the first air pump (1) is turned on, and the device performs gas extraction detection on the ambient gas outside the wall; in the mode of extracting air 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 turn; 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 closed wall in real time, and the monitoring data are uploaded to the host computer software in real time.

8. The monitoring method according to claim 7, characterized in that: When the working mode selected in step 1 is the wall-only extraction mode, the specific steps of step 3 are: the second air pump (2) is turned on by the host computer software or the mobile terminal Bluetooth. After the second air pump (2) is turned on, air is extracted from the closed wall. The mixed gas flows through the second gas-water separator (4) and enters the first air chamber cavity (5) after being filtered. 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 subsequent mixed gas is discharged from the closed 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 monitored by the probes in the first air chamber cavity (5) and the second air chamber cavity (6) are 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 according to claim 7, characterized in that: When the working mode selected in step 1 is the mode of only pumping outside the wall, the specific steps of step 3 are: the upper computer software or the mobile terminal Bluetooth controls the first air pump (1) to start pumping. After the first air pump (1) is turned on, it starts to pump air from outside the closed wall. The mixed gas flows through the first gas-water separator (3) and enters the first air chamber cavity (5) after being filtered. 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 subsequent mixed gas is discharged from the closed 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 monitored by the probes in the first air chamber cavity (5) and the second air chamber cavity (6) are directly uploaded to the upper computer software by the control module. After the data is uploaded, the first air pump (1) is automatically turned off.

10. The monitoring method according to claim 7, characterized in that: When the working mode selected in step 1 is the wall internal and external extraction mode, the specific steps of step 3 are: the upper computer software or the mobile terminal Bluetooth controls the first air pump (1) to start the extraction. After the first air pump (1) is turned on, the air is extracted from the outside of the closed wall. The mixed gas flows through the first gas-water separator (3) and enters the first air chamber cavity (5) after being filtered. 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 subsequent mixed gas The gas is discharged from the closed 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 monitored by the probes in the first air chamber cavity (5) and the second air chamber cavity (6) are directly uploaded to the upper 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 to start pumping gas from the closed wall. The mixed gas flows from the second gas-water separator (4) to the first air chamber cavity (5) and the second air chamber cavity (6). After the second air pump (2) is turned on for a period of time, the monitoring data is uploaded to the upper computer software.

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