CN112049674A - Mixed flow wind-catching opposite-discharging system and method - Google Patents
Mixed flow wind-catching opposite-discharging system and method Download PDFInfo
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- CN112049674A CN112049674A CN202010435604.4A CN202010435604A CN112049674A CN 112049674 A CN112049674 A CN 112049674A CN 202010435604 A CN202010435604 A CN 202010435604A CN 112049674 A CN112049674 A CN 112049674A
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- 238000000034 method Methods 0.000 title claims description 8
- 238000007599 discharging Methods 0.000 title description 3
- 238000012544 monitoring process Methods 0.000 claims description 9
- 230000001502 supplementing effect Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 23
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 16
- 238000009423 ventilation Methods 0.000 description 13
- 239000000428 dust Substances 0.000 description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 8
- 229910052760 oxygen Inorganic materials 0.000 description 8
- 239000001301 oxygen Substances 0.000 description 8
- 239000002245 particle Substances 0.000 description 8
- 239000003638 chemical reducing agent Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000002457 bidirectional effect Effects 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
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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
- E21F1/003—Ventilation of traffic 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
- E21F1/04—Air ducts
-
- 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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/16—Combinations of two or more pumps ; Producing two or more separate gas flows
- F04D25/166—Combinations of two or more pumps ; Producing two or more separate gas flows using fans
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/403—Casings; Connections of working fluid especially adapted for elastic fluid pumps
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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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)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ventilation (AREA)
Abstract
The invention discloses a mixed flow wind-catching opposite-arrangement system, which comprises two rows of parallel tunnels, wherein the tunnels are communicated through a compensation air channel; the wind catching fan comprises coaxial dual-drive stepping motors, transverse moving racks, transverse moving gears, wind collecting cylinders and flexible wind bag pipes, a transverse moving groove is formed in the side wall of each tunnel corresponding to the wind catching fan, the wind catching fan is arranged in the groove, the transverse moving racks are assembled at the bottom of the groove, the outer ring driving shaft of each dual-drive stepping motor is connected with the transverse moving gear, the inner driving shaft of each dual-drive stepping motor is connected with the corresponding wind collecting fan, the wind collecting fans are assembled in the wind collecting cylinders, the wind collecting cylinders are connected to corresponding air chambers through the flexible wind bag pipes, and air return and air exhaust can be conducted in a targeted mode in the region with large pollution concentration in the tunnel.
Description
Technical Field
The invention belongs to the technical field of tunnel ventilation control, and particularly relates to a mixed flow wind-catching and opposite-discharging system and method.
Background
In recent years, the center of gravity of highway construction has shifted from east to west. In western regions, particularly plateau regions, the terrain is generally low at west, high at east, the terrain is complex, and the landforms are various. The spiral tunnel has the characteristics of being capable of slowing down the gradient of the climbing tunnel, reducing the influence of geological disasters such as landslide and debris flow on the road and the like, and is very suitable for the areas. The jet ventilation technology of the spiral tunnel is different from the jet ventilation technology of the low-altitude linear tunnel.
At present, the most widely used ventilation mode for domestic tunnel ventilation is jet ventilation, namely, the boosting effect of a jet fan is adopted to push jet gas in a tunnel to achieve the purpose of ventilation, and the air in the tunnel is kept in a sufficient clean, sanitary and comfortable condition.
However, the jet fan in the spiral tunnel works less effectively than the straight tunnel, and the conventional jet fan will show a tendency of air flow flowing along the outer side of the spiral in the spiral tunnel. If the wind speed distribution generates large unevenness, a certain adverse effect is generated, and because the fan can form an island effect after working for a long time aiming at the same position, the air around the fan is good, but the air quality of the outer edge area of the island is still poor, so that the air sanitary condition in the tunnel does not reach the standard, and a CO poisoning accident is caused.
Therefore, how to improve the uniformity of the wind speed distribution in the spiral tunnel is a critical problem to be solved urgently.
Disclosure of Invention
The invention aims to overcome the defects in the ventilation design of spiral tunnels in high-cold high-altitude areas, and provides a mixed flow wind catching and arranging system and method, which are used for timely adjusting the position of a tunnel fan and realizing the optimal ventilation and energy-saving effects.
In order to achieve the purpose, the invention is implemented according to the following technical scheme:
a mixed flow wind-catching opposite-arrangement system comprises two rows of tunnels arranged in parallel, wherein the tunnels are communicated through a compensation air channel, compensation fans are arranged in the compensation air channel, two sides of each compensation fan are respectively connected with an air chamber, and the outer sides of the air chambers are respectively provided with a wind-catching fan;
the wind catching fan comprises coaxial dual-drive stepping motors, transverse moving racks, transverse moving gears, wind collecting cylinders and flexible wind bag pipes, wherein a transverse moving groove is formed in the side wall of each tunnel corresponding to the wind catching fan, the wind catching fan is arranged in the groove, the transverse moving racks are assembled at the bottom of the groove, the outer ring drive shaft of each dual-drive stepping motor is connected with the transverse moving gear, the inner drive shaft of each dual-drive stepping motor is connected with the corresponding wind collecting fan, the corresponding wind collecting fans are assembled in the wind collecting cylinders, and the wind collecting cylinders are connected to corresponding air chambers through the flexible wind bag pipes.
Furthermore, the compensation fan comprises a first active fan, a second active fan, a first gas branch and a second gas branch, the first active fan is integrated in the first gas branch, the second active fan is integrated in the second gas branch, the air inlets of the first gas branch and the second gas branch are both communicated with a first air flow common pipe, the air outlets of the first gas branch and the second gas branch are communicated with a second air flow air path common pipe, the first air flow common pipe is communicated with a flexible air bag pipe of any one air capture fan, and the second air flow common pipe is communicated with a flexible air bag pipe of another air capture fan.
Furthermore, a plurality of rows of side openings are formed on the air collecting cylinder.
Furthermore, one end of the wind collecting cylinder is open, a grid is stretched at the other end of the wind collecting cylinder, and a surplus space for air flow to pass through is reserved between the wind capturing fan and the grid.
Furthermore, two sets of collecting fans are assembled on the inner driving shaft, and the two sets of collecting fans are respectively positioned on two sides of the grid.
Furthermore, an integrated monitoring unit is arranged in each tunnel in a hoisting mode, when the integrated monitoring unit monitors that the air quality of the tunnel in which the integrated monitoring unit is located is poor, the corresponding wind-catching fan rotates forwards to send air into the first gas branch and the second gas branch, and the first active fan or the second active fan or the first active fan and the second active fan are started to send air flow into the wind-catching fan of the other tunnel and penetrate out of the wind collecting barrel.
The technical scheme adopted by the invention has the beneficial effects that:
the double-drive stepping motor mechanism is adopted, the mechanism integration level is high, the sliding efficiency is realized simultaneously in air supply, the structure of the traditional double-motor double-speed reducer matching slide rail and air supply cylinder is abandoned, the structural cost is lower, the number of parts is less, the maintenance is easier, the double-motor double-speed reducer matching slide rail double-speed reducer sliding air supply cylinder double-speed reducer sliding air supply mechanism is.
The intelligent monitoring system for the double-hole complementary ventilation of the spiral tunnel realizes safe, reliable and effective control of the fans in the tunnel, simultaneously reduces the influence on a power supply and distribution network of the tunnel in a plateau area, reduces the labor intensity of personnel, realizes energy-saving operation to the maximum extent, and realizes the characteristics of informatization, digitization, automation and interaction.
The invention achieves the aim of safety and energy saving by considering the double-hole complementary ventilation mode and reasonably utilizing the influence of the ventilation transverse channel on the ventilation system in the tunnel. The feedback of the system structure can be more effective by adopting the invention.
Description of the reference numerals
FIG. 1 is a system subsection of the present invention;
FIG. 2 is a tunnel profile of the present invention;
FIG. 3 is a block diagram of a compensating fan;
FIG. 4 is a block diagram of a wind capture fan;
FIG. 5 is an assembled view of the wind capture fan during movement with the track;
Detailed Description
Example 1
The utility model provides a mixed flow is caught wind and is arranged system to line which characterized in that: the device comprises two rows of parallel tunnels, the tunnels are communicated through a compensation air channel, a compensation fan 1 is arranged in the compensation air channel, two sides of the compensation fan are respectively connected with an air chamber 2, and the outer side of each air chamber is respectively provided with an air catching fan 3;
the wind catching fan comprises a coaxial dual-drive stepping motor 3a1, a traverse rack, a traverse gear, a wind collecting barrel 3a2 and a flexible wind bag pipe, a traverse groove is arranged on the side wall of each tunnel corresponding to the wind catching fan, the wind catching fan is arranged in the groove, the traverse rack 3a5 is assembled at the bottom of the groove, the dual-drive stepping motor is provided with a central inner drive shaft 3a3 and an outer rotating shaft which is positioned at the periphery of the inner drive shaft 3a3 and rotates along the circumferential direction, an annular space is formed between the inner drive shaft 3a3 and the outer rotating shaft, the outer rotating shaft is butted with the traverse gear 3a4, an outer ring drive shaft of the dual-drive stepping motor is connected with the traverse gear 3a4, the inner drive shaft 3a3 of the dual-drive stepping motor is connected with the wind collecting fan, the wind collecting fan is assembled in the wind collecting barrel 3a2, the wind collecting barrel is connected to a corresponding air chamber through the flexible wind bag pipe, the wind collecting barrel is provided with a plurality of rows of side openings, one end of the wind collecting barrel is open, the other end of the wind collecting barrel is stretched to form a grid, and a surplus space for air flow to pass through is reserved between the wind catching fan and the grid.
The compensation fan comprises a first active fan 2a3, a second active fan 2a4, a first gas branch 2a1 and a second gas branch 2a2, the first active fan is integrated in the first gas branch, the second active fan is integrated in the second gas branch, the air inlets of the first gas branch and the second gas branch are both communicated with a first air flow common pipe 2a5, the air outlets of the first gas branch and the second gas branch are communicated with a second air flow gas circuit common pipe 2a6, the first air flow common pipe is communicated with a flexible air bag pipe of any one wind capture fan, the second air flow common pipe is communicated with a flexible air bag pipe of the other wind capture fan, and the flexible air bag pipes of the wind capture fans are respectively communicated with the first air flow common pipe 2a5 and the second air flow gas circuit common pipe 2a 6.
Two sets of fan collectors are mounted on the inner driving shaft and located on two sides of the grid respectively.
Example 2
The realization method of the invention is that the parallel axial flow tunnel fresh air compensation system comprises two rows of parallel tunnels which are communicated through a compensation air channel, a compensation fan is arranged in the compensation air channel, the fan is a bidirectional fan, an integrated monitoring unit is hung in each tunnel,
the method comprises the following steps:
s1, collecting fresh air information,
each tunnel wind acquisition module acquires the wind speed N, the sulfur dioxide content M, the oxygen content Q, the dust content E and the dust particle content P larger than ten microns in the air of the tunnel at the current moment;
s2 analyzing and comparing the pollution concentration,
firstly, value assignment is carried out, a fraction interval A and a corresponding reference system B are set, the numerical range of the reference system B is equally divided into a value range A, and the wind speed N, the sulfur dioxide content M, the oxygen content Q, the dust content E and the dust particle content P larger than ten microns in the air are sequentially sleeved into the value range A for value assignment to obtain a wind speed value N after the value assignment is finishediSulfur dioxide content value MiOxygen content value QiDust content value EiThe content value P of dust particles larger than ten microns in the airi；
② grading, adopting AQI algorithm
Sequentially substituting the wind speed value NiSulfur dioxide content value MiOxygen content value QiDust content value EiThe content value P of dust particles larger than ten microns in the airi；
Obtaining the air quality index Q of the environmentAQ；
Weighting, namely taking the air quality index in the tunnel at the moment as a calibration value, and weighting the air quality index in the tunnel at the moment in the calibration value record, wherein the weighting index is a specified weight alpha at the current moment, and the weighted weight of the air quality index at the current moment is QHAQ
The average value Q of the weight of the hourly time periodαHAQCounting and calculating the average value Q of the weight values of the time periods of each hour on the dayαHAQAnd calculating variance, marking the variance according to the environmental temperature and the air pressure marked by the integrated monitoring unit, and obtaining a variance value J by taking every seven days as a periodn1......Jn7，
By using
N is an estimated value, Jn1Is the first-day variance value jn7Is the value of the last power variance
Obtaining a predicted value N
Will predict the values N and QαHAQAnd comparing, and if the difference is smaller than the allowable range K, taking the estimated value N as the weighted weight of the air quality index at the current moment.
Loop recording, weighting every moment and calculating average value Q of weight in every hour time periodαHAQUpon entering the next hour period, Q will be turned onαHAQReplacing said alpha.
S3, supplementing fresh air,
calculating the values Q of the two tunnel wind collecting modulesHAQComparison of size, QHAQThe tunnel corresponding to the larger value is a high-pollution tunnel QHAQThe tunnel corresponding to the smaller value is a clean tunnel, and the compensation fan is adopted to extract air in the high-pollution tunnel and fill the air into the clean tunnel.
Example 2
A parallel axial flow tunnel fresh air compensation system comprises two rows of parallel tunnels which are communicated through a compensation air channel, a compensation fan is arranged in the compensation air channel, the fan is a bidirectional fan, an integrated monitoring unit is hung in each tunnel,
the method comprises the following steps:
s1, collecting fresh air information,
each tunnel wind acquisition module acquires the wind speed N, the sulfur dioxide content M, the oxygen content Q, the dust content E and the dust particle content P larger than ten microns in the air of the tunnel at the current moment;
s2 analyzing and comparing the pollution concentration,
firstly, value assignment is carried out, a fraction interval A and a corresponding reference system B are set, the numerical range of the reference system B is equally divided into a value range A, and the wind speed N, the sulfur dioxide content M, the oxygen content Q, the dust content E and the dust particle content P larger than ten microns in the air are sequentially sleeved into the value range A for value assignment to obtain a wind speed value N after the value assignment is finishediSulfur dioxide content value MiOxygen content value QiDust content value EiThe content value P of dust particles larger than ten microns in the airi；
② grading, adopting AQI algorithm
Sequentially substituting the wind speed value NiSulfur dioxide content value MiOxygen content value QiDust content value EiThe content value P of dust particles larger than ten microns in the airi；
Obtaining the air quality index Q of the environmentAQ；
Weighting, namely taking the air quality index in the tunnel at the moment as a calibration value, and weighting the air quality index in the tunnel at the moment in the calibration value record, wherein the weighting index is a specified weight alpha at the current moment, and the weighted weight of the air quality index at the current moment is QHAQ
Loop recording, weighting every moment and calculating average value Q of weight in every hour time periodαHAQThe average value Q of the weight per hour time periodαHAQCounting and calculating the average value Q of the weight values of the time periods of each hour on the dayαHAQAnd calculating a variance, the variance being marked based on the ambient temperature and barometric pressure marked by the integrated monitoring unit, toObtaining a variance value J every seven daysn1......Jn7，
By using
N is an estimated value, Jn1Is the first-day variance value jn7Is the value of the last power variance
Obtaining a predicted value N
Will predict the values N and QαHAQAnd comparing, and if the difference is smaller than the allowable range K, taking the estimated value N as the weighted weight of the air quality index at the current moment.
The K value is an average value range obtained by counting the estimated value corresponding to the variance mark according to the ambient temperature and the atmospheric pressure.
S3, supplementing fresh air,
calculating the values Q of the two tunnel wind collecting modulesHAQComparison of size, QHAQThe tunnel corresponding to the larger value is a high-pollution tunnel QHAQThe tunnel corresponding to the smaller value is a clean tunnel, air is sent into the first gas branch and the second gas branch by adopting the corresponding air capture fan in a forward rotation mode, the first driving fan or the second driving fan or the first driving fan and the second driving fan are started to send air flow into the air capture fan of the other tunnel, the air capture fan reversely rotates at the moment and sucks air flow back, and air in the high-pollution tunnel is extracted and filled into the clean tunnel through the air collection cylinder.
Claims (6)
1. The utility model provides a mixed flow is caught wind and is arranged system to line which characterized in that: the wind-catching device comprises two rows of parallel tunnels, wherein the tunnels are communicated through a compensation air channel, compensation fans are arranged in the compensation air channel, two sides of each compensation fan are respectively connected with an air chamber, and the outer sides of the air chambers are respectively provided with a wind-catching fan;
the wind catching fan comprises coaxial dual-drive stepping motors, transverse moving racks, transverse moving gears, wind collecting cylinders and flexible wind bag pipes, wherein a transverse moving groove is formed in the side wall of each tunnel corresponding to the wind catching fan, the wind catching fan is arranged in the groove, the transverse moving racks are assembled at the bottom of the groove, the outer ring drive shaft of each dual-drive stepping motor is connected with the transverse moving gear, the inner drive shaft of each dual-drive stepping motor is connected with the corresponding wind collecting fan, the corresponding wind collecting fans are assembled in the wind collecting cylinders, and the wind collecting cylinders are connected to corresponding air chambers through the flexible wind bag pipes.
2. A mixed flow wind-catching convection system according to claim 1, characterized in that: the compensation fan comprises a first driving fan, a second driving fan, a first gas branch and a second gas branch, the first driving fan is integrated in the first gas branch, the second driving fan is integrated in the second gas branch, the air inlets of the first gas branch and the second gas branch are communicated with a first air flow common pipe, the air outlets of the first gas branch and the second gas branch are communicated with a second air flow air path common pipe, the first air flow common pipe is communicated with a flexible air bag pipe of any one wind catching fan, and the second air flow common pipe is communicated with a flexible air bag pipe of the other wind catching fan.
3. A mixed flow wind-catching convection system according to claim 2, characterized in that: the air collecting cylinder is provided with a plurality of rows of side openings.
4. A mixed flow wind-catching convection system according to claim 1, characterized in that: one end of the wind collecting barrel is open, the other end of the wind collecting barrel is stretched with grids, and a surplus space for air flow to pass through is reserved between the wind catching fan and the grids.
5. A mixed flow wind-catching convection system according to claim 4, characterized in that: two sets of fan collectors are mounted on the inner driving shaft and located on two sides of the grid respectively.
6. A method of supplementing a mixed flow wind capture convection system comprising a mixed flow wind capture convection system as claimed in claim 5, wherein: and when the integrated monitoring unit monitors that the air quality of the tunnel is poor, the corresponding air capture fan positively rotates to send air into the first air branch and the second air branch, and the first active fan or the second active fan or the first active fan and the second active fan are started to send air flow into the air capture fan of the other tunnel and penetrate out of the air collection barrel.
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| CN202010435604.4A CN112049674B (en) | 2020-05-21 | 2020-05-21 | Mixed flow wind-catching opposite-discharging system and method |
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| CN202010435604.4A CN112049674B (en) | 2020-05-21 | 2020-05-21 | Mixed flow wind-catching opposite-discharging system and method |
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| CN112049674B CN112049674B (en) | 2022-05-17 |
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2020
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