CN207348889U - Tunnel jet blower guiding device - Google Patents
Tunnel jet blower guiding device Download PDFInfo
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- CN207348889U CN207348889U CN201721398976.4U CN201721398976U CN207348889U CN 207348889 U CN207348889 U CN 207348889U CN 201721398976 U CN201721398976 U CN 201721398976U CN 207348889 U CN207348889 U CN 207348889U
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- guiding device
- jet blower
- tunnel
- guide vane
- jet
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Abstract
The utility model provides a kind of tunnel jet blower guiding device, and tunnel jet blower guiding device includes：Guiding device shell (9), guiding device rotation axis (11) and guiding device guide vane (6)；The air inlet of guiding device shell (9) is connected fixation with the jet blower outlet (5) of jet blower (4)；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 varying jet blower exit flow direction, the high-speed flow for shortening jet blower forms the distance of the uniform wind speed in main hole, reduces jet blower high-speed flow and directly blows to drag losses caused by large obstacle.
Description
Technical field
The utility model belongs to tunnel ventilation technical field, and in particular to a kind of tunnel jet blower guiding device.
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.Under normal circumstances, vcehicular tunnel height is more rich, there is certain setting spacing between wind turbine and tunnel roof,
Frictional force between the high-speed flow 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-speed flow 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, is carried
The overall effect of high system, becomes and improves one urgent issue of tunnel operation grade.
Utility model content
In view of the defects existing in the prior art, the utility model provides a kind of tunnel jet blower guiding device, can be effective
Solve the above problems.
The technical solution adopted in the utility model is as follows：
The utility model provides a kind of tunnel jet blower guiding device, including：Guiding device shell (9), guiding device
Rotation axis (11) and guiding device guide vane (6)；
Jet blower (4) is hung on below tunnel roof (1) by jet blower hanger (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
Jet blower outlet (5) connection of flow fan (4) is fixed, 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 rotation axis (11)；A guiding device guide vane is fixedly mounted on each guiding device rotation axis (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 rotation axis (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, reduces the frictional force between jet blower and tunnel wall, improves the efficiency of jet blower.
Preferably, the guiding device rotation axis (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 pass through bolt or welding manner connection fix.
Tunnel jet blower guiding device provided by the utility model has the following advantages：
(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 varying jet blower exit flow direction, the high-speed flow for shortening jet blower forms the uniform wind in main hole
The distance of speed, reduces jet blower high-speed flow and directly blows to drag losses caused by large obstacle；
(3) tunnel jet blower guiding device provided by the utility model, can make not according to the different of wind turbine specification
The guiding device of same specification.According to factors such as the distance between jet blower and tunnel wall and road gradients, water conservancy diversion is filled
The guide vane angle put is adjusted, and reaches the reduction pressure loss, puies forward efficient purpose, guide vane adjust angle according to
The actual conditions in tunnel, adjustable-angle is generally within 10 °.
(4) the utility model can realize that engineering standardization, integration make, and improve product quality, simplify construction
Flow.
(5) the utility model 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 utility model in tunnel；
Fig. 2 is the profile of jet blower guiding device provided by the utility model；
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 utility model；
Fig. 6 is jet blower longitudinal air flow diffusion contour；
Wherein：1- tunnel rooves, 2- jet blowers hanger, 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 rotation axis, large obstacle in 12- tunnels.
Embodiment
In order to which the technical problem, technical solution and the beneficial effect that are solved the utility model are more clearly understood, below
With reference to accompanying drawings and embodiments, the utility model is further elaborated.It should be appreciated that specific implementation described herein
Example only to explain the utility model, is not used to limit the utility model.
The utility model provides a kind of tunnel jet blower guiding device, and central scope is：Exported in tunnel jet blower
Guiding device is installed at position, guiding device is exported with jet blower and is connected to form an entirety, is filled by adjusting water conservancy diversion
The guide vane angle put, it is possible to achieve the adjusting to jet blower airflow direction, reduces jet blower air-flow and tunnel wall
Between frictional force, improve the efficiency of jet blower.Therefore, the utility model height-limited, jet stream that effectively solves tunnel construction
The problem of fan 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 tablejRepresent the internal diameter of jet blower, 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 varying the export direction of jet blower, can effectively reduce
The friction loss of jet blower.According to numerical simulation as a result, boosting efficiency can improve 40% or so.
Based on this, a kind of tunnel jet blower guiding device of utility model people's design studies, can improve in building height
Jet blower whole efficiency under confined condition.With reference to figure 1, Fig. 2 and Fig. 5, tunnel jet blower guiding device includes：Guiding device
Shell 9, guiding device rotation axis 11 and guiding device guide vane 6；
Jet blower 4 hangs on the lower section of tunnel roof 1 by jet blower hanger 2；Guiding device shell 9 is horizontally disposed,
Its one end is air inlet, and the other end is exhaust outlet；The jet blower outlet 5 of the air inlet of guiding device shell 9 and jet blower 4
Connection is fixed, and the air-flow that jet blower 4 is discharged is imported into guiding device；Wherein, the air inlet of guiding device shell 9 is with penetrating
Fixation is connected by modes such as bolt or welding between the jet blower outlet 5 of flow fan 4.
In the inner hub location of guiding device shell 9, several rotatably mounted guiding device rotation axis from top to bottom
11, guiding device rotation axis 11 can use bolt；A guiding device water conservancy diversion is fixedly mounted in each guiding device rotation axis 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 rotation axis 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；5 discharge of jet blower outlet 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 stream wind
4 exit flow angle of machine, reduces the frictional force between jet blower and tunnel wall, improves the efficiency of jet blower.
Utility model people carries out numerous studies experiment, finds the tilt angle alpha and jet blower of guiding device guide vane
There are following relation between power of boosting：
Wherein：Δ P boosts power for jet blower, 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 wind turbine
Degree and jet blower airflow direction are related, and concrete numerical value needs according to experiment or numerical simulation verify definite.
Therefore, because the distance between jet blower and tunnel-side the pressure loss of jet blower is influenced 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 stream wind
Machine additional pressure drops, improve the pumping efficiency of wind turbine.
The guiding device can also be applied to jet blower outlet and large obstacle distance is too small, and high-speed flow directly impacts
Large obstacle, the excessive situation of caused additional pressure drops.High-speed flow 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 matched from different wind turbine models, in city tunnel, underwater tunnel
The tunnel that the tunnel headroom heights such as road are limited, and the tunnel that large obstacle can not be avoided effectively with wind turbine longitudinal pitch, should
Device is obvious to jet blower efficiency enhancement effect.
The utility model also provides a kind of method of river diversion based on tunnel jet blower guiding device, comprises the following steps：
Step 1, in the 5 installation guiding device 10 of jet blower outlet for hanging on the jet blower 4 below tunnel roof 1；
Distance according to jet blower 4 apart from tunnel roof 1, determines the basic parameter of guiding device 10, 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 5 discharge of jet blower outlet 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 9,4 exit flow angle of jet blower is thus adjusted, reduces jet blower and tunnel
Frictional force between wall, improves the efficiency of jet blower.
In addition, when determining the basic parameter of guiding device 10, it is also contemplated that following factor：It whether there is in front of jet blower
The height of barrier, the horizontal distance of obstacle distance jet blower and barrier.
Specifically, in the case of tunnel setting height(from bottom) is sufficient, jet blower high-speed flow forms uniform wind speed in main hole
Required distance is generally in 100m or so, such as Fig. 6.Since also there are variable information board, track Warning Mark, smokejack in tunnel
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-speed flow and main hole gas can be shortened
Stream mixing required distance, reduces additional drag caused by barrier obstruction, with reference to figure 4.
Therefore, in front of the jet blower there are during barrier, by adjusting the angle of inclination of guiding device guide vane, into
And changing jet blower exit flow direction, the high-speed flow for shortening jet blower forms the distance of the uniform wind speed in main hole, reduces
Jet blower high-speed flow 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, can also to established tunnel jet blower into
Row transformation.
Tunnel jet blower guiding device provided by the utility model and method of river diversion have the following advantages：
(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 varying jet blower exit flow direction, the high-speed flow for shortening jet blower forms the uniform wind in main hole
The distance of speed, reduces jet blower high-speed flow and directly blows to drag losses caused by large obstacle；
(3) tunnel jet blower guiding device provided by the utility model, can make not according to the different of wind turbine specification
The guiding device of same specification.According to factors such as the distance between jet blower and tunnel wall and road gradients, water conservancy diversion is filled
The guide vane angle put is adjusted, and reaches the reduction pressure loss, puies forward efficient purpose, guide vane adjust angle according to
The actual conditions in tunnel, adjustable-angle is generally within 10 °.
(4) the utility model can realize that engineering standardization, integration make, and improve product quality, simplify construction
Flow.
(5) the utility model is formed simple, and easy for installation, later maintenance amount is small.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
For art personnel, on the premise of the utility model principle is not departed from, some improvements and modifications can also be made, these improve and
Retouching should also regard the scope of protection of the utility model.
Claims (3)
- A kind of 1. tunnel jet blower guiding device, it is characterised in that including：Guiding device shell (9), guiding device rotation axis (11) and guiding device guide vane (6)；Jet blower (4) is hung on below tunnel roof (1) by jet blower hanger (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 stream wind Jet blower outlet (5) connection of machine (4) is fixed, 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 Rotation axis (11)；A guiding device guide vane (6) is fixedly mounted on each guiding device rotation axis (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 rotation axis (11) rotates, the guiding device guide vane (6) is driven to rotate, into 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, improves the efficiency of jet blower.
- 2. tunnel jet blower guiding device according to claim 1, it is characterised in that the guiding device rotation axis (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 fixation is connected by bolt or welding manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721398976.4U CN207348889U (en) | 2017-10-27 | 2017-10-27 | Tunnel jet blower guiding device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721398976.4U CN207348889U (en) | 2017-10-27 | 2017-10-27 | Tunnel jet blower guiding device |
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| CN207348889U true CN207348889U (en) | 2018-05-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107605525A (en) * | 2017-10-27 | 2018-01-19 | 北京交科公路勘察设计研究院有限公司 | Tunnel jet blower guiding device and method of river diversion |
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2017
- 2017-10-27 CN CN201721398976.4U patent/CN207348889U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107605525A (en) * | 2017-10-27 | 2018-01-19 | 北京交科公路勘察设计研究院有限公司 | Tunnel jet blower guiding device and method of river diversion |
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