Underground roadway air monitoring system

Abstract

The utility model relates to the technical field of underground mine roadway monitoring, in particular to an underground roadway air monitoring system which comprises an air compression system, the air compression system comprises instrument units and an air exchange unit, air outlets of the instrument units are communicated with an instrument mother pipe, the instrument mother pipe is connected with instrument equipment, and the instrument equipment is connected with the air exchange unit. Air outlets of the air exchange units are communicated with an air exchange main pipe which is connected with air exchange equipment; the air supply system comprises an air supply pipe and a valve assembly used for controlling on-off of the air supply pipe, and the two ends of the air supply pipe communicate with the instrument mother pipe and the air exchange mother pipe correspondingly; and the air monitoring system is in signal connection with the valve assembly and the air exchange equipment at the same time, and the air monitoring system is used for detecting the air circulation condition of the underground roadway and controlling the air supply system and the air exchange equipment according to the detected result. The air exchange air compressor has the effect that normal underground work can be maintained when the air exchange air compressor is abnormal.

Description

Technical Field

[0001] The present application relates to the technical field of underground mine tunnel monitoring, and in particular to an underground tunnel air monitoring system. Background Art

[0002] According to the requirements of the specification, the safety production informatization of metal and non-metal underground mines is constructed and improved from four aspects: environmental monitoring, personnel monitoring, video monitoring, and safety management. Environmental monitoring should have the monitoring function of parameters such as wind pressure and wind speed. The environmental monitoring in related technologies only has a monitoring function. When the equipment is normal, it can basically meet the needs of underground work. However, when the air compressor is abnormal or the equipment needs to be repaired, it has to stop working, resulting in low production efficiency. Utility Model Content

[0003] In order to maintain normal underground work when an abnormality occurs in the ventilation air compressor, the present application provides an underground tunnel air monitoring system.

[0004] The present application provides an underground tunnel air monitoring system that adopts the following technical solutions:

[0005] A underground tunnel air monitoring system, including an air compression system, the air compression system includes an instrument unit and a ventilation unit, the instrument unit includes a plurality of instrument air compressors, the air outlets of the plurality of instrument air compressors are all connected to the instrument main pipe, the instrument main pipe is connected to the instrument equipment, the ventilation unit includes a plurality of ventilation air compressors, the air outlets of the plurality of ventilation air compressors are all connected to the ventilation main pipe, the ventilation main pipe is connected to the ventilation equipment; an air supply system, the air supply system includes an air supply pipe and a valve assembly for controlling the on and off of the air supply pipe, the two ends of the air supply pipe are respectively connected to the instrument main pipe and the ventilation main pipe; an air monitoring system, the air monitoring system is simultaneously connected to the valve assembly and the ventilation equipment signal, the air monitoring system is used to detect the air circulation condition of the underground tunnel, and control the air supply system and the ventilation equipment according to the detected results.

[0006] By adopting the above technical solution, when a problem occurs with the ventilation air compressor in the well, the valve assembly can be opened to connect the ventilation main pipe with the instrument main pipe, thereby calling on the instrument air compressor to meet the needs of normal underground work.

[0007] Optionally, the air monitoring system includes a controller and a pressure probe, the controller is simultaneously connected to the pressure probe and the valve assembly signal, and the pressure probe is arranged on the ventilation main pipe.

[0008] By adopting the above technical solution, the pressure probe can be used to monitor the pressure changes of the ventilation main pipe in real time, thereby promptly reflecting the working status of the ventilation air compressor and providing accurate data support for the intelligent control of the air supply system.

[0009] Optionally, the ventilation equipment includes a main fan, a secondary fan and an auxiliary fan, the main fan is connected to the ventilation main pipe through a main branch pipe, the secondary fan is connected to the ventilation main pipe through a secondary branch pipe, and the auxiliary fan is connected to the ventilation main pipe through an auxiliary branch pipe. A first solenoid valve is provided on the main branch pipe, a second solenoid valve is provided on the secondary branch pipe, and a third solenoid valve is provided on the auxiliary branch pipe.

[0010] By adopting the above technical solution, detailed control of the ventilation equipment is achieved, and the working status of each fan can be flexibly adjusted according to actual conditions to ensure air circulation in the underground tunnels.

[0011] Optionally, the air monitoring system also includes a main wind speed probe, a secondary wind speed probe and an auxiliary wind speed probe, the main wind speed probe is arranged at the main fan, the secondary wind speed probe is arranged at the secondary fan, the auxiliary wind speed probe is arranged at the auxiliary fan, the main wind speed probe is connected to the first solenoid valve signal, the secondary wind speed probe is connected to the second solenoid valve signal, the auxiliary wind speed probe is connected to the third solenoid valve signal, and the main wind speed probe, the secondary wind speed probe and the auxiliary wind speed probe are all connected to the controller signal.

[0012] By adopting the above technical solution, the wind speed at each fan can be monitored in real time using a wind speed probe, providing accurate data support for the intelligent control of the fan, and further ensuring air circulation in the underground tunnels.

[0013] Optionally, the air monitoring system further includes an alarm component, which is signal-connected to the controller and includes a transmitter and an audible and visual alarm.

[0014] By adopting the above technical solution, the transmitter can send a signal to the command center when the air monitoring system detects an abnormal situation, reminding the command center to send maintenance personnel to carry out maintenance in time. The sound and light alarm can issue an alarm in time when the air monitoring system detects an abnormal situation, reminding on-site staff to take measures, thereby improving the safety of underground work.

[0015] Optionally, the air supply pipe is used to transport the compressed air in the instrument main pipe to the ventilation main pipe, and the valve assembly includes a one-way valve and a secondary electromagnetic stop valve, which are arranged on the air supply pipe in sequence along the flow direction of the gas, and the secondary electromagnetic stop valve is connected to the controller signal.

[0016] By adopting the above technical solution, the secondary electromagnetic stop valve can control the on-off of the air supply pipe and can be quickly opened when the ventilation air compressor is abnormal, thereby replenishing compressed air into the ventilation main pipe to ensure air circulation in the underground tunnels. The one-way valve only allows compressed air to flow from the instrument main pipe to the ventilation main pipe, which can avoid the backflow of compressed air in the ventilation main pipe after the secondary stop valve is accidentally opened or fails, resulting in the inability to circulate air in the well.

[0017] Optionally, the valve assembly further includes a primary electromagnetic stop valve, which is disposed in the air supply pipe and upstream of the one-way valve along the flow direction of the gas, and is connected to the controller signal.

[0018] By adopting the above technical solution, the primary electromagnetic stop valve can replace the secondary stop valve after the secondary stop valve fails, thereby controlling the on-off of the air supply pipe.

[0019] Optionally, a purification component is provided between the air outlet of the instrument air compressor and the instrument main pipe, and / or a purification component is provided between the air outlet of the ventilation air compressor and the ventilation main pipe.

[0020] By adopting the above technical solution, the quality of compressed air delivered to the instrument main pipe and the ventilation main pipe can be ensured, which on the one hand improves the life of the instrument equipment and on the other hand improves the comfort of underground workers.

[0021] Optionally, the purification component includes at least one of a water separator, a filter and a dryer.

[0022] By adopting the above technical solution, the purification component can effectively remove moisture, impurities and other substances in the compressed air, ensuring the quality of the compressed air passing through the purification component.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. This application adopts an air monitoring system to monitor the air circulation status of the underground tunnel in real time, and intelligently controls the air supply system and ventilation equipment according to the monitoring results. Therefore, when the ventilation air compressor is abnormal, the working status of the air supply system and ventilation equipment can be quickly adjusted to ensure the air circulation of the underground working environment, thereby maintaining normal underground work and improving production efficiency;

[0025] 2. This application uses an alarm component to promptly issue an alarm when the air monitoring system detects an abnormal situation, reminding the staff to take measures and further ensuring the safety of underground work. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1It is a structural schematic diagram of the underground tunnel air monitoring system provided in an embodiment of the present application.

[0027] Explanation of the reference numerals: 1-instrument air compressor; 2-instrument main pipe; 3-instrument equipment; 4-ventilation air compressor; 5-ventilation main pipe; 601-main fan; 602-main branch pipe; 603-first solenoid valve; 604-main wind speed probe; 701-secondary fan; 702-secondary branch pipe; 703-second solenoid valve; 704-secondary wind speed probe; 801-auxiliary fan; 802-auxiliary branch pipe; 803-third solenoid valve; 804-auxiliary wind speed probe; 9-pressure probe; 10-air supply pipe; 11-primary solenoid stop valve; 12-check valve; 13-secondary solenoid stop valve; 14-purification component. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1 This application is described in further detail.

[0029] In the normal working environment of the underground tunnel, the air compression system plays an important role in the power supply and air circulation of the underground instrument equipment 3. At present, the air compression system of the underground tunnel is generally equipped with an instrument unit and a ventilation unit, each of which has multiple air compressors divided into common and spare air compressors. When the common air compressor has a problem, the spare air compressor is activated. When the spare air compressor also has a problem, it can only be shut down for maintenance. Except for the maintenance personnel, irrelevant personnel are evacuated from the underground tunnel, resulting in work stagnation.

[0030] In view of this, an embodiment of the present application discloses an underground tunnel air monitoring system.

[0031] like Figure 1 As shown, the underground tunnel air monitoring system includes an air compression system, an air supply system and an air monitoring system.

[0032] Among them, the air compression system includes an instrument unit and a ventilation unit. The instrument unit includes a plurality of instrument air compressors 1, and the air outlets of the plurality of instrument air compressors 1 are all connected to the instrument main pipe 2, and the instrument main pipe 2 is connected to the instrument equipment 3, and the instrument main pipe 2 is further connected to the instrument equipment 3. Similarly, the ventilation unit also includes a plurality of ventilation air compressors 4, and the air outlets of the ventilation air compressors 4 are all connected to the ventilation main pipe 5, and the ventilation main pipe 5 is connected to the ventilation equipment. The air supply system includes an air supply pipe 10 and a valve assembly, and the two ends of the air supply pipe 10 are respectively connected to the instrument main pipe 2 and the ventilation main pipe 5, and the valve assembly is used to control the on and off of the air supply pipe 10. The air monitoring system is connected to the valve assembly and the ventilation equipment signal. The main function of the air monitoring system is to detect the air circulation condition of the underground tunnel and control the air supply system and the ventilation equipment according to the detection results. For example, when problems occur in all of the multiple ventilation air compressors 4 in the ventilation unit, causing the air monitoring system to detect problems with the air circulation in the underground tunnel, the compressed air in the instrument main pipe 2 can be supplemented to the ventilation main pipe 5 through the air supply pipe 10.

[0033] like Figure 1 As shown, specifically, the air monitoring system includes a controller and a pressure probe 9. The controller is connected to the pressure probe 9 and the valve assembly signal at the same time. The pressure probe 9 is arranged in the ventilation main pipe 5, wherein the controller can be a PLC controller or a single chip microcomputer. The pressure probe 9 can monitor the pressure change of the ventilation main pipe 5 in real time and send these data to the controller. The air pressure stability in the ventilation main pipe 5 is poor, and it is necessary to observe whether there is fluctuation from time to time. At the same time, the pressure value in the pipe is also the basis for whether to open the air supply pipe 10. The controller can judge the working state of the ventilation air compressor 4 according to the received pressure data, and judge whether it is the pressure fluctuation in the ventilation main pipe 5 or the poor working state of the ventilation air compressor 4 by analyzing the data. If the pressure is always below the preset threshold value within the unit time, then the controller judges that the ventilation air compressor 4 is in poor working state at this time, and the controller will send a signal to the valve assembly to open it, so that the compressed air in the instrument main pipe 2 is supplemented to the ventilation main pipe 5 through the air supply pipe 10.

[0034] At the same time, the air monitoring system can also adjust the working status of the ventilation equipment. Figure 1As shown, the ventilation equipment includes a main fan 601, a secondary fan 701 and an auxiliary fan 801. The main fan 601 is connected to the ventilation main pipe 5 through a main branch pipe 602, the secondary fan 701 is connected to the ventilation main pipe 5 through a secondary branch pipe 702, and the auxiliary fan 801 is connected to the ventilation main pipe 5 through an auxiliary branch pipe 802. A first solenoid valve 603 is provided on the main branch pipe 602, a second solenoid valve 703 is provided on the secondary branch pipe 702, and a third solenoid valve 803 is provided on the auxiliary branch pipe 802. The air monitoring system also includes a main wind speed probe 604, a secondary wind speed probe 704 and an auxiliary wind speed probe 804. The main wind speed probe 604 is arranged at the main fan 601, the secondary wind speed probe 704 is arranged at the secondary fan 701, and the auxiliary wind speed probe 804 is arranged at the auxiliary fan 801. The main wind speed probe 604 is connected to the first solenoid valve 603 signal, the secondary wind speed probe 704 is connected to the second solenoid valve 703 signal, and the auxiliary wind speed probe 804 is connected to the third solenoid valve 803 signal. The main fan 601, the secondary fan 701, the auxiliary fan 801, the main wind speed probe 604, the secondary wind speed probe 704 and the auxiliary wind speed probe 804 are all connected to the controller signal.

[0035] During normal operation in the underground tunnel, the main fan 601 and the secondary fan 701 are used for ventilation, and the auxiliary fan 801 is on standby. When the main wind speed probe 604 in the air monitoring system detects that the wind speed at the main fan 601 drops below the threshold or the secondary wind speed probe 704 detects that the wind speed at the secondary fan 701 drops below the threshold, and the pressure in the ventilation main pipe 5 is normal, the controller determines that the main fan 601 or the secondary fan 701 is faulty, the solenoid valve corresponding to the faulty fan is closed, the third solenoid valve 803 is opened, and the auxiliary fan 801 starts working.

[0036] In order to be able to promptly alert the staff when an abnormal situation occurs, the air monitoring system also includes an alarm component, which is connected to the controller signal, and the alarm component includes a transmitter and an audible and visual alarm. When the air monitoring system detects an abnormal situation, the transmitter can send a signal to the command center to remind the command center to send maintenance personnel for maintenance in time. The audible and visual alarm can promptly issue an alarm when the air monitoring system detects an abnormal situation, reminding the on-site staff to take measures, thereby improving the safety of underground work. The abnormal situation includes but is not limited to: after the valve assembly is opened, the pressure probe 9 still detects that the pressure in the ventilation main pipe 5 is lower than the threshold, or, after the auxiliary fan 801 is turned on, the wind speed at the auxiliary fan 801 drops below the threshold.

[0037] like Figure 1 As shown, the valve assembly of the air supply system includes a one-way valve 12 and a secondary electromagnetic stop valve 13. The one-way valve 12 and the secondary electromagnetic stop valve 13 are sequentially arranged on the air supply pipe 10 along the flow direction of the gas, and the secondary electromagnetic stop valve 13 is connected to the controller signal.

[0038] The one-way valve 12 only allows compressed air to flow from the instrument main pipe 2 to the ventilation main pipe 5, which can prevent the compressed air in the ventilation main pipe 5 from flowing back to the instrument main pipe 2 after the secondary stop valve is opened by mistake or fails. The secondary stop valve is normally closed and will only be opened when the compressed air in the instrument main pipe 2 needs to be transported to the ventilation main pipe 5 using the air supply pipe 10. When the compressed air needs to be supplemented, the controller will send a signal to the secondary electromagnetic stop valve 13 to open it, so that the compressed air in the instrument main pipe 2 is supplemented to the ventilation main pipe 5 through the one-way valve 12 and the secondary electromagnetic stop valve 13.

[0039] In order to prevent the compressed air in the instrument pipeline from flowing into the ventilation pipeline after the secondary stop valve fails, a primary stop valve is provided on the air supply pipe 10 along the flow direction of the gas and located upstream of the one-way valve 12. Regardless of whether the secondary stop valve is in standby or normal working state, the primary stop valve remains normally open, and only when the secondary stop valve fails will the primary stop valve be temporarily closed to replace the work of the secondary stop valve.

[0040] like Figure 1 As shown, in actual use, various instruments, pneumatic valves and underground workers have certain requirements for the cleanliness of the compressed air. In order to improve the cleanliness of the compressed air, a purification component 14 is provided between the air outlet of the instrument air compressor 1 and the instrument main pipe 2, and / or a purification component 14 is provided between the air outlet of the ventilation air compressor 4 and the ventilation main pipe 5. The purification component 14 includes at least one of a water separator, a filter and a dryer.

[0041] Centrifugal air compressors are mostly used in underground tunnels. Centrifugal air compressors continuously inhale external gas to form continuous and uninterrupted gas. The use of multiple impellers in series can gradually increase the wind pressure. When a certain pressure is reached, it is compressed air. The air source of this compressed air is usually the ambient gas on the surface of the mine, and the ambient gas may contain water vapor or dust. A large amount of ambient air is inhaled and compressed, which may cause a large amount of water vapor or impurities in the compressed air, which will have a negative impact on the instrument or valve and the underground staff. The purification component 14 can alleviate this adverse effect to a certain extent. The purification component 14 can include a water separator, which can effectively separate the moisture in the air when the air humidity is high. The purification component 14 can also include a filter, which can filter out impurities such as dust in the air. The purification component 14 can also include a dryer, which can absorb the residual moisture in the air to make the compressed air drier when the air humidity is normal.

[0042] The implementation principle of the underground tunnel air monitoring system in the first embodiment of the present application is:

[0043] When the air compression system operates normally, the ventilation unit and instrument unit operate separately and are independently controlled.

[0044] In one application scenario, the ventilation unit contains two ventilation air compressors 4, one is normally used and the other is standby. When the pressure probe 9 detects that the pressure in the ventilation main pipe 5 is continuously lower than the set threshold, the ventilation unit can start the standby ventilation air compressor 4, and the standby ventilation air compressor 4 provides compressed air.

[0045] When the standby ventilation air compressor 4 is activated, if the pressure probe 9 still detects that the pressure in the ventilation main pipe 5 is continuously lower than the set threshold, the controller sends a signal to control the secondary shut-off valve to open, and the ventilation main pipe 5 is now connected to the instrument main pipe 2. For example, the instrument unit includes three instrument air compressors 1, two of which are commonly used and one is a standby. The instrument unit can provide some compressed air that the ventilation unit cannot provide by turning on the standby instrument air compressor 1.

[0046] When the standby instrument air compressor 1 is activated, if the pressure probe 9 still detects that the pressure in the instrument main pipe 2 is continuously lower than the set threshold, the controller sends a signal, the alarm component starts working, the transmitter sends a signal to the command center to remind the command center to send maintenance personnel for maintenance in time, and the sound and light alarm sounds an alarm to remind on-site staff to take measures.

[0047] In one application scenario, the ventilation equipment includes a main fan 601, a secondary fan 701 and an auxiliary fan 801, the main fan 601 and the secondary fan 701 are in common use, and the auxiliary fan 801 is in standby use. When the main wind speed probe 604 detects that the wind speed at the main fan 601 drops below a threshold value or the secondary wind speed probe 704 detects that the wind speed at the secondary fan 701 drops below a threshold value, and the pressure in the ventilation main pipe 5 is normal, the controller determines that the main fan 601 or the secondary fan 701 is faulty, the solenoid valve corresponding to the faulty fan is closed, the third solenoid valve 803 is opened, and the auxiliary fan 801 starts to work. After the auxiliary fan 801 is turned on, the auxiliary wind speed probe 804 detects that the wind speed at the auxiliary fan 801 drops below a threshold value, and the pressure in the ventilation main pipe 5 is normal, the controller sends a signal, the alarm component starts to work, the transmitter sends a signal to the command center, reminding the command center to send maintenance personnel for maintenance in time, and the sound and light alarm sounds an alarm to remind the on-site staff to take measures.

[0048] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An underground tunnel air monitoring system, characterized in that: include: An air compression system, the air compression system comprising an instrument unit and a ventilation unit, the instrument unit comprising a plurality of instrument air compressors (1), the air outlets of the plurality of instrument air compressors (1) are all connected to an instrument main pipe (2), the instrument main pipe (2) is connected to an instrument device (3), the ventilation unit comprising a plurality of ventilation air compressors (4), the air outlets of the plurality of ventilation air compressors (4) are all connected to a ventilation main pipe (5), the ventilation main pipe (5) is connected to the ventilation device; An air supply system, the air supply system comprising an air supply pipe (10) and a valve assembly for controlling the on-off of the air supply pipe (10), wherein two ends of the air supply pipe (10) are respectively connected to the instrument main pipe (2) and the ventilation main pipe (5); An air monitoring system is connected to the valve assembly and the ventilation equipment by signals at the same time. The air monitoring system is used to detect the air circulation conditions in the underground tunnels and control the air supply system and the ventilation equipment according to the detected results.

2. The underground tunnel air monitoring system according to claim 1, characterized in that: The air monitoring system comprises a controller and a pressure probe (9), wherein the controller is simultaneously connected to the pressure probe (9) and the valve assembly by signal, and the pressure probe (9) is arranged on the ventilation main pipe (5).

3. The underground tunnel air monitoring system according to claim 2, characterized in that: The ventilation device comprises a main fan (601), a secondary fan (701) and an auxiliary fan (801); the main fan (601) is connected to the ventilation main pipe (5) via a main branch pipe (602); the secondary fan (701) is connected to the ventilation main pipe (5) via a secondary branch pipe (702); the auxiliary fan (801) is connected to the ventilation main pipe (5) via an auxiliary branch pipe (802); a first solenoid valve (603) is provided on the main branch pipe (602); a second solenoid valve (703) is provided on the secondary branch pipe (702); and a third solenoid valve (803) is provided on the auxiliary branch pipe (802).

4. The underground tunnel air monitoring system according to claim 3 is characterized in that: The air monitoring system further comprises a main wind speed probe (604), a secondary wind speed probe (704) and an auxiliary wind speed probe (804); the main wind speed probe (604) is arranged at the main fan (601); the secondary wind speed probe (704) is arranged at the secondary fan (701); the auxiliary wind speed probe (804) is arranged at the auxiliary fan (801); the main wind speed probe (604) is connected to the first solenoid valve (603) by signal; the secondary wind speed probe (704) is connected to the second solenoid valve (703) by signal; the auxiliary wind speed probe (804) is connected to the third solenoid valve (803) by signal; and the main wind speed probe (604), the secondary wind speed probe (704) and the auxiliary wind speed probe (804) are all connected to the controller by signal.

5. The underground tunnel air monitoring system according to claim 4, characterized in that: The air monitoring system also includes an alarm component, which is connected to the controller signal, and the alarm component includes a transmitter and an audible and visual alarm.

6. The underground tunnel air monitoring system according to claim 2, characterized in that: The air supply pipe (10) is used to transport the compressed air in the instrument main pipe (2) to the ventilation main pipe (5), and the valve assembly includes a one-way valve (12) and a secondary electromagnetic stop valve (13). The one-way valve (12) and the secondary electromagnetic stop valve (13) are arranged on the air supply pipe (10) in sequence along the flow direction of the gas, and the secondary electromagnetic stop valve (13) is connected to the controller signal.

7. The underground tunnel air monitoring system according to claim 6, characterized in that: The valve assembly further comprises a primary electromagnetic stop valve (11), which is arranged on the gas supply pipe (10) and is arranged upstream of the one-way valve (12) along the flow direction of the gas. The primary electromagnetic stop valve (11) is connected to the controller signal.

8. The underground tunnel air monitoring system according to claim 1, characterized in that: A purification component (14) is provided between the air outlet of the instrument air compressor (1) and the instrument main pipe (2), and / or a purification component (14) is provided between the air outlet of the ventilation air compressor (4) and the ventilation main pipe (5).

9. The underground tunnel air monitoring system according to claim 8, characterized in that: The purification assembly (14) includes at least one of a water separator, a filter and a dryer.

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