CN111058887A - Long-distance ventilation and safety control system and method - Google Patents
Long-distance ventilation and safety control system and method Download PDFInfo
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- CN111058887A CN111058887A CN201911395368.1A CN201911395368A CN111058887A CN 111058887 A CN111058887 A CN 111058887A CN 201911395368 A CN201911395368 A CN 201911395368A CN 111058887 A CN111058887 A CN 111058887A
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- 238000009423 ventilation Methods 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims description 9
- 238000010276 construction Methods 0.000 claims abstract description 57
- 238000005086 pumping Methods 0.000 claims abstract description 34
- 238000001514 detection method Methods 0.000 claims abstract description 25
- 238000012806 monitoring device Methods 0.000 claims abstract description 23
- 238000007599 discharging Methods 0.000 claims abstract description 11
- 230000001105 regulatory effect Effects 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000004880 explosion Methods 0.000 claims description 9
- 230000001629 suppression Effects 0.000 claims description 9
- 238000012544 monitoring process Methods 0.000 claims description 6
- 239000000428 dust Substances 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 55
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 12
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/006—Ventilation at the working face of galleries or tunnels
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/08—Ventilation arrangements in connection with air ducts, e.g. arrangements for mounting ventilators
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Ventilation (AREA)
Abstract
The invention provides a long-distance ventilation and safety control system, which is used for a long-distance construction tunnel and comprises press-in fans, a harmful gas concentration detection device, a harmful gas pumping and discharging device and an automatic monitoring device, wherein each press-in fan is provided with a plurality of air cylinders, the press-in fans are arranged at the opening of the construction tunnel, the harmful gas concentration detection device is arranged in the construction tunnel, the harmful gas pumping and discharging device is arranged in the construction tunnel, the automatic monitoring device is arranged in the harmful gas pumping and discharging device, and an upper computer is arranged in a control center outside the construction tunnel. The invention has the characteristics of safety, energy saving and economy, the construction section and the construction area with potential safety hazards are treated in a key way, the requirement of safe ventilation is penetrated in the whole construction period, the double-fan double-air-cylinder press-in type ventilation system is adopted, the ventilation quantity in the pipe gallery is ensured safely and effectively, a small amount of harmful gas released in the pipe gallery is diluted, and safe and efficient construction is ensured.
Description
Technical Field
The invention belongs to the technical field of engineering tunnels, and particularly relates to a long-distance ventilation and safety control system and method.
Background
Shallow layer marsh gas that meets in the tunnel (utility tunnel) construction process is one of the main geological disasters, and the long distance tunnel ventilation system who adopts at present is comparatively ordinary, does not have corresponding technological measure to the condition that partial district section tunnel contains harmful gas.
Disclosure of Invention
The technical problem solved by the invention is to provide a long-distance ventilation and safety control system, which can provide enough fresh air for operating personnel in a tunnel, dilute and discharge various harmful gases and dust, adjust the temperature and humidity of the air in the tunnel, create a good operating environment and lay a foundation for ensuring safety, quality and progress.
The technical solution for realizing the purpose of the invention is as follows:
a long-distance ventilation and safety control system is used for a long-distance construction tunnel and comprises a plurality of press-in fans, a harmful gas concentration detection device, a harmful gas pumping and discharging device and an automatic monitoring device, wherein the press-in fans, the harmful gas concentration detection device, the harmful gas pumping and discharging device and the automatic monitoring device are all in communication connection with an upper computer; each press-in type fan is provided with a plurality of air cylinders and is arranged at the construction tunnel opening and used for supplying air to the construction tunnel; the harmful gas concentration detection device is arranged in the construction tunnel and used for detecting the concentration of harmful gas in the construction tunnel; the harmful gas pumping and exhausting device is arranged in the construction tunnel and is used for pumping and exhausting the harmful gas in the construction tunnel; the automatic monitoring device is arranged in the harmful gas pumping device and is used for monitoring the pipeline of the harmful gas pumping device; the upper computer is arranged in a control center outside the construction tunnel and used for collecting and displaying information in the construction tunnel and issuing control signals;
the harmful gas pumping and discharging device comprises a main pipe, branch pipes, a negative pressure automatic water drainage device, a pressure measuring device, a flow regulating meter and an explosion suppression device, wherein the branch pipes are distributed in a construction tunnel, the branch pipes are all connected with the main pipe, the main pipe extends out of the construction tunnel, the negative pressure automatic water drainage device, the pressure measuring device, the flow regulating meter and the explosion suppression device are arranged in the branch pipes, the negative pressure automatic water drainage device is used for automatically draining water under negative pressure, the pressure measuring device is used for measuring the pressure in a pipeline, the flow regulating meter is used for regulating the flow in the pipeline, and the explosion suppression device is used for suppressing dust in.
Furthermore, the automatic monitoring device of the long-distance ventilation and safety control system comprises a flow sensor, a temperature sensor, a negative pressure sensor, a CH4 concentration sensor and a CO concentration sensor, wherein the flow sensor, the temperature sensor, the negative pressure sensor, the CH4 concentration sensor and the CO concentration sensor are all provided with working voltage by power supply equipment and are respectively used for monitoring the flow, the temperature, the pressure, the CH4 concentration and the CO concentration in the pipeline of the harmful gas pumping and discharging device.
Further, according to the long-distance ventilation and safety control system, the air outlet speed of the air cylinder of the press-in type fan is 7.9 m/s.
A long-distance ventilation and safety control method comprises the following steps:
the harmful gas concentration detection device detects the concentration of harmful gas in the tunnel, and the automatic monitoring device automatically detects the pipeline of the harmful gas pumping device to obtain a temperature signal, a gas flow signal, a pressure signal, CH4 concentration information and CO concentration information in the pipeline; meanwhile, manual measurement is periodically adopted, and the automatic monitoring device is corrected;
in the working well digging period, a single press-in type fan is matched with a single air cylinder for press-in type ventilation;
in the shield tunnel section, two press-in fans are matched with a double air duct to perform press-in air supply, wherein one press-in fan is used for operation and the other press-in fan is used for standby according to the detected concentration of harmful gas before a region with larger harmful gas detection occurrence amount;
in the area with large harmful gas detection occurrence amount, two press-in fans are adopted to be matched with double air cylinders for ventilation, the fans operate in a variable frequency mode, and a harmful gas pumping and exhausting device is adopted to pump and exhaust harmful gas;
after the area with large harmful gas detection occurrence amount and the construction distance of more than 2000m, two press-in fans are adopted to cooperate with the double wind cylinders to supply air, and the fans are operated in a fixed air volume variable frequency mode.
Compared with the prior art, the invention adopting the technical scheme has the following technical effects:
1. the long-distance ventilation and safety control system has the characteristics of safety, energy conservation and economy, and emphatically treats construction sections and construction areas with potential safety hazards.
2. The long-distance ventilation and safety control system adopts the double fans and the double air cylinders to perform press-in ventilation, so that the ventilation quantity in the pipe gallery is safely and effectively ensured, a small amount of harmful gas released in the pipe gallery is diluted, and safe and efficient construction is ensured.
3. The long-distance ventilation and safety control system also has the function of adjusting the temperature and the humidity of the air in the tunnel.
Drawings
Fig. 1 is a block diagram of a long distance ventilation and safety control system of the present invention.
Fig. 2 is a schematic diagram of the long distance ventilation and safety control system of the present invention.
Fig. 3 is a schematic structural diagram of an automatic monitoring device of the long-distance ventilation and safety control system of the present invention.
Reference signs mean: 1: forced fan, 2: concentration detection device, 3: harmful gas pump drainage device, 4: automatic monitoring device, 5: and (4) a shield working face.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
A long-distance ventilation and safety control system is shown in figures 1-2 and is used for long-distance construction of tunnels and comprises a plurality of press-in type fans 1, a harmful gas concentration detection device 2, a harmful gas pumping and discharging device 3 and an automatic monitoring device 4. The forced fan 1, the harmful gas concentration detection device 2, the harmful gas pumping and exhausting device 3 and the automatic monitoring device 4 are all in communication connection with an upper computer.
Every is equipped with a plurality of dryer on the forced fan 1, and forced fan 1 sets up at the construction tunnel mouth for supply air to the construction tunnel. The air outlet speed of the air duct of the press-in type fan 1 is 7.9 m/s.
The harmful gas concentration detection device 2 is arranged in the construction tunnel and used for detecting the concentration of harmful gas in the construction tunnel.
The harmful gas pumping and exhausting device 3 is arranged in the construction tunnel and is used for pumping and exhausting the harmful gas in the construction tunnel. The harmful gas pumping and discharging device 3 comprises a main pipe, branch pipes, a negative pressure automatic water drainage device, a pressure measuring device, a flow regulating meter and an explosion suppression device, wherein the branch pipes are distributed in the construction tunnel, the branch pipes are all connected with the main pipe, the main pipe extends out of the construction tunnel, the negative pressure automatic water drainage device, the pressure measuring device, the flow regulating meter and the explosion suppression device are arranged in the branch pipes, the negative pressure automatic water drainage device is used for automatically draining water under negative pressure, the pressure measuring device is used for measuring the pressure in a pipeline, the flow regulating meter is used for regulating the flow in the pipeline, and the explosion suppression device is used for suppressing dust in.
The automatic monitoring device 4 is arranged in the harmful gas pumping device and is used for monitoring the pipeline of the harmful gas pumping device. As shown in fig. 3, the automatic monitoring device 4 includes a flow sensor, a temperature sensor, a negative pressure sensor, a CH4 concentration sensor, and a CO concentration sensor, and the flow sensor, the temperature sensor, the negative pressure sensor, the CH4 concentration sensor, and the CO concentration sensor are all supplied with operating voltage by power supply equipment, and are respectively used for monitoring the flow, the temperature, the pressure, the CH4 concentration, and the CO concentration in the pipeline of the harmful gas pumping and discharging device. Meanwhile, manual measurement is periodically adopted, and the automatic monitoring device is corrected.
The upper computer is arranged at a control center outside the construction tunnel and used for collecting and displaying information in the construction tunnel and distributing control signals.
A long-distance ventilation and safety control method comprises the following steps:
the harmful gas concentration detection device 2 detects the concentration of the harmful gas in the tunnel, the automatic monitoring device 4 automatically detects the pipeline of the harmful gas pumping and exhausting device 3, and obtains a temperature signal, a gas flow signal, a pressure signal, CH4 concentration information and CO concentration information in the pipeline; meanwhile, manual measurement is periodically adopted, and the automatic monitoring device is corrected;
in the working well excavation period, a single press-in type fan 1 is adopted to cooperate with a single air cylinder to perform press-in type ventilation;
in the shield tunnel section, two press-in fans 1 are matched with double air cylinders for press-in air supply, wherein one press-in fan 1 is adopted to operate and the other press-in fan 1 is used for standby according to the detected concentration of harmful gas before a region with larger harmful gas detection occurrence amount;
in the area with large harmful gas detection occurrence amount, two press-in fans 1 are adopted to be matched with double air cylinders for ventilation, the fans are operated in a variable frequency mode, the motor frequency is adjusted by taking the air volume as a reference, and a harmful gas pumping and exhausting device 3 is adopted to pump and exhaust harmful gas in a short distance;
after the area with large harmful gas detection occurrence amount and the construction distance of more than 2000m, two press-in fans 1 are adopted to cooperate with the double air cylinders to supply air, and the fans are operated in a fixed air quantity variable frequency mode, so that the frequency of the fans is adjusted by keeping the air quantity of the air outlet constant, and the energy conservation of the fans is realized.
Example 1
In construction of the Sutong GIL pipe gallery, according to characteristics of shield construction and relevant national specifications such as harmful gas detection reports, coal mine safety regulations and the like, a safe ventilation scheme and design during construction of the shield pipe gallery penetrating through a stratum containing harmful gas under a long-distance large shield diameter are researched and designed. The design is in the principle of safe energy-conserving economy, and the construction section, the construction area that will have the potential safety hazard are treated in focus to run through the requirement of safe ventilation in whole construction period, adopted two fan double-fan section of thick bamboo forced ventilation system, the ventilation volume in the pipe gallery is guaranteed effectively to the safety, dilutes a small amount of harmful gas of release in the pipe gallery, guarantees safe efficient construction. In the design, the wind barrel is required to be flat, straight and smooth, and a rigid elbow is arranged at a slope-changing position so as to reduce the on-way resistance and the local resistance of a pipeline, reduce energy consumption and increase air volume. Except the leading press-in type ventilation system, the forced ventilation is carried out at the parts which are easy to gather harmful gas at the parts such as the shield tail and the like in the process of changing the cutter of the shield machine and installing a steel pipe by a slurry system, so that the danger of local gathering is eliminated. In addition, the exhaust in the balance air bag is led out of the ground and is pumped and exhausted by a harmful gas pumping and exhausting pump.
The ground slurry system is provided with a large-air-volume fan to blow away harmful gas carried in slurry, so that the safe operation environment in underground and ground construction periods is ensured.
There is a pressure facility in the shield machine, once the shield machine self-distribution fan is out of order or the methane concentration reaches 1.0% to shut down, there must be a special intrinsic safety type (pneumatic fan) in the shield machine to suck the fresh air flow pressed in to the ground to blow the exhaust air flow to the cutter head of the shield machine, and there is a special pneumatic fan to discharge the harmful gas. The series of settings need to be negotiated with the shield machine factory. The pneumatic fan can make the air distribution amount reach a larger amount as far as possible according to the pressure of the air pressure pipe and the size of the inner space of the shield machine.
The foregoing is directed to embodiments of the present invention and, more particularly, to a method and apparatus for controlling a power converter in a power converter, including a power converter, a power.
Claims (4)
1. A long-distance ventilation and safety control system is characterized by being used for a long-distance construction tunnel and comprising a plurality of press-in fans, a harmful gas concentration detection device, a harmful gas pumping device and an automatic monitoring device, wherein the press-in fans, the harmful gas concentration detection device, the harmful gas pumping device and the automatic monitoring device are all in communication connection with an upper computer; each press-in type fan is provided with a plurality of air cylinders and is arranged at the construction tunnel opening and used for supplying air to the construction tunnel; the harmful gas concentration detection device is arranged in the construction tunnel and used for detecting the concentration of harmful gas in the construction tunnel; the harmful gas pumping and exhausting device is arranged in the construction tunnel and is used for pumping and exhausting the harmful gas in the construction tunnel; the automatic monitoring device is arranged in the harmful gas pumping device and is used for monitoring the pipeline of the harmful gas pumping device; the upper computer is arranged in a control center outside the construction tunnel and used for collecting and displaying information in the construction tunnel and issuing control signals;
the harmful gas pumping and discharging device comprises a main pipe, branch pipes, a negative pressure automatic water drainage device, a pressure measuring device, a flow regulating meter and an explosion suppression device, wherein the branch pipes are distributed in a construction tunnel, the branch pipes are all connected with the main pipe, the main pipe extends out of the construction tunnel, the negative pressure automatic water drainage device, the pressure measuring device, the flow regulating meter and the explosion suppression device are arranged in the branch pipes, the negative pressure automatic water drainage device is used for automatically draining water under negative pressure, the pressure measuring device is used for measuring the pressure in a pipeline, the flow regulating meter is used for regulating the flow in the pipeline, and the explosion suppression device is used for suppressing dust in.
2. The long-distance ventilation and safety control system according to claim 1, wherein the automatic monitoring device comprises a flow sensor, a temperature sensor, a negative pressure sensor, a CH4 concentration sensor and a CO concentration sensor, and the flow sensor, the temperature sensor, the negative pressure sensor, the CH4 concentration sensor and the CO concentration sensor are all supplied with working voltage by power supply equipment and are respectively used for monitoring the flow, the temperature, the pressure, the CH4 concentration and the CO concentration in the pipeline of the harmful gas pumping device.
3. The long reach ventilation and safety control system of claim 1, wherein the outlet air velocity of the barrel of the forced draft fan is 7.9 m/s.
4. A long-distance ventilation and safety control method is characterized by comprising the following steps:
the harmful gas concentration detection device detects the concentration of harmful gas in the tunnel, and the automatic monitoring device automatically detects the pipeline of the harmful gas pumping device to obtain a temperature signal, a gas flow signal, a pressure signal, CH4 concentration information and CO concentration information in the pipeline; meanwhile, manual measurement is periodically adopted, and the automatic monitoring device is corrected;
in the working well digging period, a single press-in type fan is matched with a single air cylinder for press-in type ventilation;
in the shield tunnel section, two press-in fans are matched with a double air duct to perform press-in air supply, wherein one press-in fan is used for operation and the other press-in fan is used for standby according to the detected concentration of harmful gas before a region with larger harmful gas detection occurrence amount;
in the area with large harmful gas detection occurrence amount, two press-in fans are adopted to be matched with double air cylinders for ventilation, the fans operate in a variable frequency mode, and a harmful gas pumping and exhausting device is adopted to pump and exhaust harmful gas;
after the area with large harmful gas detection occurrence amount and the construction distance of more than 2000m, two press-in fans are adopted to cooperate with the double wind cylinders to supply air, and the fans are operated in a fixed air volume variable frequency mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911395368.1A CN111058887A (en) | 2019-12-30 | 2019-12-30 | Long-distance ventilation and safety control system and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911395368.1A CN111058887A (en) | 2019-12-30 | 2019-12-30 | Long-distance ventilation and safety control system and method |
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| CN111058887A true CN111058887A (en) | 2020-04-24 |
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| CN201911395368.1A Pending CN111058887A (en) | 2019-12-30 | 2019-12-30 | Long-distance ventilation and safety control system and method |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1437506A1 (en) * | 1986-10-15 | 1988-11-15 | Донецкий политехнический институт | Apparatus for ventilating mine working in case of gas dynamic manifestations |
| JPH07102899A (en) * | 1993-10-01 | 1995-04-18 | Kajima Corp | Harmful gas discharge system in pit of shield construction method |
| JPH08121099A (en) * | 1994-10-19 | 1996-05-14 | Kajima Corp | Ventilation capacity control method |
| CN103452579A (en) * | 2013-09-10 | 2013-12-18 | 禹州市富山煤业有限公司 | Negative pressure drainer and gas drainage pipeline |
| CN103835743A (en) * | 2012-11-23 | 2014-06-04 | 西安众智惠泽光电科技有限公司 | Ventilation control system for tunnel face |
| CN203962027U (en) * | 2014-07-21 | 2014-11-26 | 陕西彬长大佛寺矿业有限公司 | Large flow gas drainage system |
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| CN107269307A (en) * | 2017-07-05 | 2017-10-20 | 刘毅 | Tunnel ventilation system |
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-
2019
- 2019-12-30 CN CN201911395368.1A patent/CN111058887A/en active Pending
Patent Citations (10)
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|---|---|---|---|---|
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Application publication date: 20200424 |