CN107605525A - Tunnel jet blower guiding device and method of river diversion - Google Patents
Tunnel jet blower guiding device and method of river diversion Download PDFInfo
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- CN107605525A CN107605525A CN201711020321.8A CN201711020321A CN107605525A CN 107605525 A CN107605525 A CN 107605525A CN 201711020321 A CN201711020321 A CN 201711020321A CN 107605525 A CN107605525 A CN 107605525A
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Abstract
The present invention, which provides a kind of tunnel jet blower guiding device and method of river diversion, tunnel jet blower guiding device, to be included：Guiding device shell (9), guiding device rotary shaft (11) and guiding device guide vane (6)；The jet blower outlet (5) of the air inlet of guiding device shell (9) and jet blower (4) is connected；The angle adjustable of guiding device guide vane.Advantage is：Do not changing the situation of tunnel construction height, by setting guiding device in the jet blower port of export, you can effectively improve jet blower efficiency, there is good application prospect for the height-limited tunnel of tunnel construction；The device is equally applicable in the case of large obstacle in front of jet blower can not avoid, and is improved tunnel ventilation air-flow.By changing jet blower exit flow direction, the high velocity air for shortening jet blower forms the distance of the uniform wind speed in main hole, reduces jet blower high velocity air and directly blows to drag losses caused by large obstacle.
Description
Technical field
The invention belongs to tunnel ventilation technical field, and in particular to a kind of tunnel jet blower guiding device and water conservancy diversion side
Method.
Background technology
Jet blower is due to simple structure, and flexible arrangement, control is easy, has been obtained in Highway Tunnel Ventilation System more wide
General application.Generally, vcehicular tunnel height is more rich, there is certain setting spacing between blower fan and tunnel roof,
Frictional force between the high velocity air and tunnel wall of jet blower can also be effectively controlled.
Under the conditions of city tunnel, submerged tunnel etc., due to the limitation of projects cost and selection of route, tunnel clearance
It is height-limited, blown out between jet blower and tunnel roof apart from very little, high velocity air along straight line, tapered diffusion, high speed gas
Additional drag can greatly increase between stream and tunnel wall, so as to increase the running cost in tunnel；In addition, jet blower is in master
Hole forms uniform air flow, and the effect of auxiliary pressurized can also weaken.
Therefore, how in the case where tunnel height is limited, jet blower energy consumption is reduced using relatively simple method, carried
The whole structure of high system, turn into and improve one thing urgently to be resolved hurrily of tunnel operation grade.
The content of the invention
The defects of existing for prior art, the present invention provide a kind of tunnel jet blower guiding device and water conservancy diversion side
Method, can effectively it solve the above problems.
The technical solution adopted by the present invention is as follows：
The present invention provides a kind of tunnel jet blower guiding device, including：Guiding device shell (9), guiding device rotate
Axle (11) and guiding device guide vane (6)；
Jet blower (4) is hung on below tunnel roof (1) by jet blower suspension bracket (2)；The guiding device shell
(9) it is horizontally disposed with, its one end is air inlet, and the other end is exhaust outlet；The air inlet of the guiding device shell (9) is penetrated with described
The jet blower outlet (5) of flow fan (4) is connected, and the air-flow that the jet blower (4) is discharged is imported into the water conservancy diversion
In device；
In the inner hub location of the guiding device shell (9), several rotatably mounted described water conservancy diversion from top to bottom
Device rotary shaft (11)；A guiding device guide vane is fixedly mounted on each guiding device rotary shaft (11)
(6) the guiding device guide vane (6), is made to be located at outside air inlet and the guiding device of the guiding device shell (9)
Between the exhaust outlet of shell (9)；When the guiding device rotary shaft (11) rotates, the guiding device guide vane (6) is driven
Rotate, and then adjust the angle of inclination of the guiding device guide vane (6)；Make the guiding device guide vane (6) downward
It is obliquely installed；The air-flow of jet blower outlet (5) discharge of the jet blower (4) is along the guiding device guide vane (6)
Flow, and finally flowed out from the guiding device shell (9) diagonally downward, thus adjust the jet blower (4) exit flow
Angle, the frictional force between jet blower and tunnel wall is reduced, improve the efficiency of jet blower.
Preferably, the guiding device rotary shaft (11) is bolt.
Preferably, the jet blower outlet (5) of the air inlet of the guiding device shell (9) and the jet blower (4)
Between be connected by bolt or welding manner.
The present invention also provides a kind of method of river diversion based on tunnel jet blower guiding device, comprises the following steps：
Step 1, in jet blower outlet (5) the installation water conservancy diversion for hanging on the jet blower (4) below tunnel roof (1)
Device (10)；Distance according to jet blower (4) apart from tunnel roof (1), the basic parameter of guiding device (10) is determined, wrapped
Include：The length of guiding device guide vane (6), the angle of inclination of guiding device guide vane (6) and guiding device shell (9)
Length；
Step 2, the air-flow of jet blower outlet (5) discharge of jet blower (4) tilts along guiding device guide vane (6)
Flow downward, and finally flowed out from guiding device shell (9), thus adjust jet blower (4) exit flow angle, reduction is penetrated
Frictional force between flow fan and tunnel wall, improve the efficiency of jet blower.
Preferably, it is determined that guiding device (10) basic parameter when, it is also contemplated that following factor：Whether jet blower front
The height of barrier, the horizontal range of obstacle distance jet blower and barrier be present.
Preferably, if barrier be present in front of jet blower, by the inclination for adjusting guiding device guide vane (6)
Angle, and then change jet blower exit flow direction, shorten jet blower high velocity air formed the uniform wind speed in main hole away from
From reduction jet blower high velocity air directly blows to drag losses caused by barrier.
Tunnel jet blower guiding device provided by the invention and method of river diversion have advantages below：
(1) situation of tunnel construction height is not being changed, by setting guiding device in the jet blower port of export, you can have
Effect improves jet blower efficiency, has good application prospect for the height-limited tunnel of tunnel construction；
(2) device is equally applicable in the case of large obstacle in front of jet blower can not avoid, and makes tunnel ventilation gas
Stream is improved.By changing jet blower exit flow direction, the high velocity air for shortening jet blower forms the uniform wind in main hole
The distance of speed, reduce jet blower high velocity air and directly blow to drag losses caused by large obstacle；
(3) tunnel jet blower guiding device provided by the invention, different rule can be made according to the difference of blower fan specification
The guiding device of lattice.According to factors such as the distance between jet blower and tunnel wall and road gradients, to guiding device
Guide vane angle is adjusted, and reaches the reduction pressure loss, puies forward efficient purpose, and guide vane adjusts angle according to tunnel
Actual conditions, adjustable-angle is typically within 10 °.
(4) engineering standardization can be achieved in the present invention, integration makes, and improves product quality, simplifies construction process.
(5) present invention is formed simple, and easy for installation, later maintenance amount is small.
Brief description of the drawings
Fig. 1 is scheme of installation of the jet blower guiding device provided by the invention in tunnel；
Fig. 2 is the profile of jet blower guiding device provided by the invention；
Fig. 3 is when not installing jet blower guiding device, caused by jet blower air-flow and large obstacle hypotelorism
Air-flow change schematic diagram；
Fig. 4 is when having installed jet blower guiding device, jet blower air-flow is become by air-flow caused by large obstacle
Change schematic diagram；
Fig. 5 is the main structure diagram of jet blower guiding device provided by the invention；
Fig. 6 is jet blower longitudinal air flow diffusion contour；
Fig. 7 is the structural representation illustrated in the friction loss coefficient table of jet blower position；
Wherein：1- tunnel rooves, 2- jet blowers suspension bracket, 3- jet blower inlet air flows direction, 4- jet blowers, 5- are penetrated
Flow fan outlet, 6- guiding devices guide vane, 7- jet blower exit flows wind direction, 8- air-flows change angle, 9- water conservancy diversion dress
Put shell, 10- guiding devices, 11- guiding devices rotary shaft, large obstacle in 12- tunnels.
Embodiment
In order that technical problem solved by the invention, technical scheme and beneficial effect are more clearly understood, below in conjunction with
Drawings and Examples, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein only to
The present invention is explained, is not intended to limit the present invention.
The present invention provides a kind of tunnel jet blower guiding device and method of river diversion, central scope：In tunnel jet
Fan outlet opening position installs guiding device, guiding device is exported with jet blower and is connected to form an entirety, passes through tune
Save guiding device guide vane angle, it is possible to achieve the regulation to jet blower airflow direction, reduce jet blower air-flow with
Frictional force between tunnel wall, improve the efficiency of jet blower.Therefore, the present invention effectively solution tunnel construction is height-limited,
The problem of jet blower efficiency is impacted.
Specifically, it has been investigated that, jet blower efficiency is in addition to jet blower self-characteristic influences, also by jet blower
The distance between tunnel wall influences.Jet blower position friction loss coefficient is as shown in the table：
Separate unit jet blower position friction loss reduction coefficient η
Note：D in tablejThe internal diameter of jet blower is represented, Z represents the distance of jet blower centre-to-centre spacing tunnel wall.
By upper table it can be found that jet blower is nearer apart from tunnel wall, friction loss is bigger, so as to cause jet blower
Power of boosting declines.In the case where tunnel headroom height is certain, by changing the export direction of jet blower, can effectively reduce
The friction loss of jet blower.According to the result of numerical simulation, boosting efficiency can improve 40% or so.
Based on this, a kind of tunnel jet blower guiding device of inventor's design studies, it can improve and be limited in building height
Under the conditions of jet blower whole efficiency.With reference to figure 1, Fig. 2 and Fig. 5, tunnel jet blower guiding device includes：Guiding device shell
9th, guiding device rotary shaft 11 and guiding device guide vane 6；
Jet blower 4 hangs on the lower section of tunnel roof 1 by jet blower suspension bracket 2；Guiding device shell 9 is horizontally disposed,
Its one end is air inlet, and the other end is exhaust outlet；The air inlet of guiding device shell 9 exports with the jet blower of jet blower 4
5 are connected, and the air-flow that jet blower 4 is discharged is imported into guiding device；Wherein, the air inlet of guiding device shell 9 with
It is connected between the jet blower outlet 5 of jet blower 4 by modes such as bolt or welding.
In the inner hub location of guiding device shell 9, several rotatably mounted guiding device rotary shafts from top to bottom
11, guiding device rotary shaft 11 can use bolt；A guiding device water conservancy diversion is fixedly mounted in each guiding device rotary shaft 11
Blade 6, make guiding device guide vane 6 be located at guiding device shell 9 air inlet and guiding device shell 9 exhaust outlet it
Between；When guiding device rotary shaft 11 rotates, drive guiding device guide vane 6 to rotate, and then adjust guiding device water conservancy diversion leaf
The angle of inclination of piece 6；Guiding device guide vane 6 is set to tilt down setting；The discharge of jet blower outlet 5 of jet blower 4
Air-flow flows diagonally downward along guiding device guide vane 6, and is finally flowed out from guiding device shell 9, thus adjusts jet wind
The exit flow angle of machine 4, the frictional force between jet blower and tunnel wall is reduced, improve the efficiency of jet blower.
Inventor carries out numerous studies experiment, and the tilt angle alpha and jet blower for finding guiding device guide vane are boosted
Following relation between power be present：
Wherein：△ P are that jet blower boosts power, and ρ is atmospheric density, VjFor jet blower air outlet velocity, VrFor tunnel longitudinal direction
Wind speed, AJFor jet blower area of section, ArFor tunnel cross-section area, η ' is extra coefficient of resistance, high from tunnel wall with blower fan
Degree and jet blower airflow direction are relevant, and concrete numerical value needs to carry out checking determination according to experiment or numerical simulation.
Therefore, because the distance between jet blower and tunnel-side the pressure loss of jet blower is influenceed it is very big,
In the case of tunnel headroom height is restricted, by the guiding device can reduce due to setting height(from bottom) it is too low caused by jet wind
Machine additional pressure drops, improve the pumping efficiency of blower fan.
The guiding device can also be applied to jet blower outlet and large obstacle distance is too small, and high velocity air directly impacts
Large obstacle, the excessive situation of caused additional pressure drops.High velocity air and main hole gas can be shortened by the device
The distance of mixing is flowed, the air velocity of impact large obstacle is reduced in effective longitudinal pitch, so as to reduce the pressure loss.Should
Device simple structure, easy to adjust, maintenance is small, can be supported the use from different blower fan models, in city tunnel, underwater tunnel
The limited tunnel of the tunnel headroom heights such as road, and the tunnel that large obstacle can not be avoided effectively with blower fan longitudinal pitch, should
Device is obvious to jet blower efficiency enhancement effect.
The present invention also provides a kind of method of river diversion based on tunnel jet blower guiding device, comprises the following steps：
Step 1, in the installation guiding device 10 of jet blower outlet 5 for hanging on the jet blower 4 below tunnel roof 1；
Distance according to jet blower 4 apart from tunnel roof 1, the basic parameter of guiding device 10 is determined, including：Guiding device water conservancy diversion leaf
The length of the length of piece 6, the angle of inclination of guiding device guide vane 6 and guiding device shell 9；
Step 2, the air-flow of the discharge of jet blower outlet 5 of jet blower 4 is tilted towards flowing down along guiding device guide vane 6
It is dynamic, and finally flowed out from guiding device shell 9, the exit flow angle of jet blower 4 is thus adjusted, reduces jet blower and tunnel
Frictional force between wall, improve the efficiency of jet blower.
In addition, it is determined that guiding device 10 basic parameter when, it is also contemplated that following factor：It whether there is in front of jet blower
The height of barrier, the horizontal range of obstacle distance jet blower and barrier.
Specifically, in the case of tunnel setting height(from bottom) is sufficient, jet blower high velocity air forms uniform wind speed in main hole
Required distance is typically in 100m or so, such as Fig. 6.Due to variable information board, track Warning Mark, smokejack in tunnel also be present
Deng large obstacle, jet blower can be caused in this case in 30m or so apart from jet blower outlet distance in many cases
Boost effect decline, see Fig. 3.By exporting installation guiding device in jet blower, high velocity air and main hole gas can be shortened
Distance needed for stream mixing, reduces additional drag caused by barrier obstruction, with reference to figure 4.
Therefore, when barrier be present in front of jet blower, by adjusting the angle of inclination of guiding device guide vane, enter
And changing jet blower exit flow direction, the high velocity air for shortening jet blower forms the distance of the uniform wind speed in main hole, reduces
Jet blower high velocity air directly blows to drag losses caused by barrier.
Present apparatus simple structure, it is easy for installation, collocation use can be carried out with disposable type jet blower, improves jet blower
Exit flow situation.The device can factory together with jet blower it is supporting, established tunnel jet blower can also be entered
Row transformation.
Tunnel jet blower guiding device provided by the invention and method of river diversion have advantages below：
(1) situation of tunnel construction height is not being changed, by setting guiding device in the jet blower port of export, you can have
Effect improves jet blower efficiency, has good application prospect for the height-limited tunnel of tunnel construction；
(2) device is equally applicable in the case of large obstacle in front of jet blower can not avoid, and makes tunnel ventilation gas
Stream is improved.By changing jet blower exit flow direction, the high velocity air for shortening jet blower forms the uniform wind in main hole
The distance of speed, reduce jet blower high velocity air and directly blow to drag losses caused by large obstacle；
(3) tunnel jet blower guiding device provided by the invention, different rule can be made according to the difference of blower fan specification
The guiding device of lattice.According to factors such as the distance between jet blower and tunnel wall and road gradients, to guiding device
Guide vane angle is adjusted, and reaches the reduction pressure loss, puies forward efficient purpose, and guide vane adjusts angle according to tunnel
Actual conditions, adjustable-angle is typically within 10 °.
(4) engineering standardization can be achieved in the present invention, integration makes, and improves product quality, simplifies construction process.
(5) present invention is formed simple, and easy for installation, later maintenance amount is small.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
Depending on protection scope of the present invention.
Claims (6)
- A kind of 1. tunnel jet blower guiding device, it is characterised in that including：Guiding device shell (9), guiding device rotary shaft And guiding device guide vane (6) (11)；Jet blower (4) is hung on below tunnel roof (1) by jet blower suspension bracket (2)；Guiding device shell (9) water Flat to set, its one end is air inlet, and the other end is exhaust outlet；The air inlet of the guiding device shell (9) and the jet wind The jet blower outlet (5) of machine (4) is connected, and the air-flow that the jet blower (4) is discharged is imported into the guiding device In；In the inner hub location of the guiding device shell (9), several rotatably mounted described guiding devices from top to bottom Rotary shaft (11)；A guiding device guide vane (6) is fixedly mounted on each guiding device rotary shaft (11), makes The guiding device guide vane (6) is located at the air inlet and the guiding device shell (9) of the guiding device shell (9) Between exhaust outlet；When the guiding device rotary shaft (11) rotates, drive the guiding device guide vane (6) to rotate, enter And adjust the angle of inclination of the guiding device guide vane (6)；The guiding device guide vane (6) is tilted down to set Put；The air-flow of jet blower outlet (5) discharge of the jet blower (4) is tilted towards along the guiding device guide vane (6) Lower flowing, and finally flowed out from the guiding device shell (9), the jet blower (4) exit flow angle is thus adjusted, is dropped Frictional force between grazing shot flow fan and tunnel wall, improve the efficiency of jet blower.
- 2. tunnel jet blower guiding device according to claim 1, it is characterised in that the guiding device rotary shaft (11) it is bolt.
- 3. tunnel jet blower guiding device according to claim 1, it is characterised in that the guiding device shell (9) Air inlet and the jet blower (4) jet blower outlet (5) between be connected by bolt or welding manner.
- 4. a kind of method of river diversion of the tunnel jet blower guiding device based on described in claim any one of 1-3, its feature exist In comprising the following steps：Step 1, in jet blower outlet (5) the installation guiding device for hanging on the jet blower (4) below tunnel roof (1) (10)；Distance according to jet blower (4) apart from tunnel roof (1), the basic parameter of guiding device (10) is determined, including：Lead Flow length, the angle of inclination of guiding device guide vane (6) and the length of guiding device shell (9) of device guide vane (6) Degree；Step 2, jet blower (4) jet blower outlet (5) discharge air-flow along guiding device guide vane (6) diagonally downward Flowing, and finally flowed out from guiding device shell (9), jet blower (4) exit flow angle is thus adjusted, reduces jet blower With the frictional force between tunnel wall, the efficiency of jet blower is improved.
- 5. the method for river diversion according to claim 4 based on tunnel jet blower guiding device, it is characterised in that it is determined that During the basic parameter of guiding device (10), it is also contemplated that following factor：With the presence or absence of barrier, obstacle distance in front of jet blower The horizontal range of jet blower and the height of barrier.
- 6. the method for river diversion according to claim 5 based on tunnel jet blower guiding device, it is characterised in that if penetrated Barrier be present in front of flow fan, by adjusting the angle of inclination of guiding device guide vane (6), and then change jet blower and go out Mouth airflow direction, the high velocity air for shortening jet blower form the distance of the uniform wind speed in main hole, reduce jet blower high velocity air Directly blow to drag losses caused by barrier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711020321.8A CN107605525B (en) | 2017-10-27 | 2017-10-27 | Flow guiding device and flow guiding method for tunnel jet fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711020321.8A CN107605525B (en) | 2017-10-27 | 2017-10-27 | Flow guiding device and flow guiding method for tunnel jet fan |
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| Publication Number | Publication Date |
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| CN107605525A true CN107605525A (en) | 2018-01-19 |
| CN107605525B CN107605525B (en) | 2023-07-04 |
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|---|---|---|---|
| CN201711020321.8A Active CN107605525B (en) | 2017-10-27 | 2017-10-27 | Flow guiding device and flow guiding method for tunnel jet fan |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108868859A (en) * | 2018-06-20 | 2018-11-23 | 中钢集团马鞍山矿山研究院有限公司 | A kind of mine skip shaft outgoing airflow shuts off partitioning system |
| CN110953174A (en) * | 2019-12-11 | 2020-04-03 | 深圳市创智联环保设备有限公司 | Jet fan capable of automatically steering |
| CN113207700A (en) * | 2021-04-26 | 2021-08-06 | 青岛科创信达科技有限公司 | Asymmetric stepped air supply system suitable for building cultivation and improvement method |
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| CN113207700A (en) * | 2021-04-26 | 2021-08-06 | 青岛科创信达科技有限公司 | Asymmetric stepped air supply system suitable for building cultivation and improvement method |
| CN113207700B (en) * | 2021-04-26 | 2022-09-02 | 青岛科创信达科技有限公司 | Asymmetric stepped air supply system suitable for building cultivation and improvement method |
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| Publication number | Publication date |
|---|---|
| CN107605525B (en) | 2023-07-04 |
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