CN210460730U - Spiral tunnel ventilation system - Google Patents
Spiral tunnel ventilation system Download PDFInfo
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- CN210460730U CN210460730U CN201921659283.5U CN201921659283U CN210460730U CN 210460730 U CN210460730 U CN 210460730U CN 201921659283 U CN201921659283 U CN 201921659283U CN 210460730 U CN210460730 U CN 210460730U
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- jet
- fan
- spiral tunnel
- spiral
- tunnel
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Abstract
The utility model discloses a spiral tunnel ventilation system, including installing the jet fan at the spiral tunnel top, the spiral radius of spiral tunnel is 500 + 800m, spiral tunnel top sets up a set of jet fan group at one section distance of every, and every group jet fan group includes that two are fixed on the same cross section of spiral tunnel and have horizontal spaced jet fan between, the jet fan is arranged along the driving direction downward sloping. Compared with the prior art, the utility model can avoid the influence of the gas discharged from each fan on the dissipation kinetic energy through the transverse distance of each set of jet fans; the jet flow air can obtain a wider jet flow space as far as possible through the distance between the bottom of the jet flow fan set and a building limit in the spiral tunnel; meanwhile, the jet flow fan is arranged in a downward inclination mode along the travelling direction; therefore the utility model discloses can improve the interior air current wind speed homogeneity of spiral tunnel, improve the fan utilization ratio, save a large amount of electric energy.
Description
Technical Field
The utility model relates to a tunnel ventilation technical field, especially a spiral tunnel ventilation system.
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 optimal installation position of the jet fan of the spiral tunnel is different from that of the linear tunnel, if the jet fan is installed according to the cross section arrangement mode of the linear tunnel, the wind speed distribution in the tunnel is enabled to generate large nonuniformity, certain adverse effects are generated, the pollution discharge effect of the jet fan is weakened slightly, and local vortex is formed seriously, so that the air sanitation condition in the tunnel is not up to standard, and the 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 utility model discloses a solve not enough that exists among the prior art, provide a spiral tunnel ventilation system.
In order to achieve the purpose, the utility model is implemented according to the following technical scheme:
a spiral tunnel ventilation system comprises a jet fan arranged at the top of a spiral tunnel, wherein the spiral radius of the spiral tunnel is 500-800m, a group of jet fan groups are arranged at the top of the spiral tunnel at intervals, each group of jet fan group comprises two jet fans which are fixed on the same cross section of the spiral tunnel and are transversely spaced, and the jet fans are arranged in a downward inclination mode along the traffic direction.
Furthermore, the included angle between the normal direction of the outlet surface of the jet fan and the axis of the spiral tunnel is 4 degrees.
Further, the transverse interval between the two jet flow fans of each jet flow fan set is 1.96 m.
Further, the center of each group of jet fan units deviates 0-0.5m towards the inner side of the spiral center line of the spiral tunnel.
Further, a distance of 15cm is arranged between the bottom of the jet fan set and a building limit in the spiral tunnel.
Compared with the prior art, the utility model can avoid the influence of the gas discharged from each fan on the dissipation kinetic energy through the transverse distance of each set of jet fans; the jet flow air can obtain a wider jet flow space as far as possible through the distance between the bottom of the jet flow fan set and a building limit in the spiral tunnel; meanwhile, the jet flow fan is arranged in a downward inclination mode along the travelling direction; therefore the utility model discloses can improve the interior air current wind speed homogeneity of spiral tunnel, improve the fan utilization ratio, save a large amount of electric energy.
Drawings
Fig. 1 is the utility model discloses an installation schematic diagram of jet fan group on spiral tunnel cross section.
Fig. 2 is the utility model discloses a jet fan is to efflux angle schematic diagram downwards on spiral tunnel longitudinal section.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. The specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
As shown in fig. 1 and 2, the spiral tunnel ventilation system of the present embodiment includes a jet fan installed at the top of a spiral tunnel 1, the spiral radius of the spiral tunnel 1 of the present embodiment is 500-800m, a set of jet fan sets may be installed at intervals on the top of the spiral tunnel 1 through a fixed mounting frame, each set of jet fan sets includes two jet fans 4 fixed on the same cross section of the spiral tunnel 1 and having a transverse interval L therebetween, and the jet fans 4 are arranged in a downward inclination along a traffic direction.
In practical application, the transverse interval L between the two jet flow fans 4 of each group of jet flow fan sets is 1.96m, and the distance can prevent the two jet flow fans 4 of each group of jet flow fan sets from discharging gas to influence dissipation kinetic energy mutually. And a distance H of 15cm is arranged between the bottom of the jet fan set and a building limit in the spiral tunnel, so that the jet air can obtain a wider jet space as far as possible. The offset distance mu from the center of each jet fan set to the inner side of the spiral center line 3 of the spiral tunnel 1 is 0-0.5m, so that the uniformity of the jet gas wind speed in the spiral tunnel 1 can be improved. It should be noted that the applicability of the present invention is limited to the spiral tunnel with radius of R =500-800m, and there is no need for deviation when R ≧ 800 m. And the included angle phi between the normal direction of the outlet surface of the jet fan 4 and the axis of the spiral tunnel 1 is 4 degrees. The embodiment also provides a verification of a strict and reasonable numerical simulation and an orthogonal test experiment of a specific optimal installation mode, and specific installation parameters are shown in table 1. The tunnel with a certain spiral radius is arranged according to the position of the jet fan in the table 1, so that better jet fan performance and better flow field uniformity can be obtained.
TABLE 1
According to the arrangement, the uniformity of the air flow and the air speed in the spiral tunnel 1 can be improved, the utilization rate of the fan is improved, and a large amount of electric energy is saved.
The technical scheme of the utility model is not limited to the restriction of above-mentioned specific embodiment, all according to the utility model discloses a technical scheme makes technical deformation, all falls into within the protection scope of the utility model.
Claims (5)
1. The utility model provides a spiral tunnel ventilation system, includes the efflux fan of installing at the spiral tunnel top, and the spiral radius of spiral tunnel is 500-: the jet flow fan set is characterized in that a set of jet flow fan sets are arranged at intervals on the top of the spiral tunnel, each set of jet flow fan set comprises two jet flow fans which are fixed on the same cross section of the spiral tunnel and transversely spaced between the two jet flow fans, and the jet flow fans are arranged in a downward inclined mode along the driving direction.
2. The spiral tunnel ventilation system of claim 1, wherein: and the included angle between the normal direction of the outlet surface of the jet fan and the axis of the spiral tunnel is 4 degrees.
3. The spiral tunnel ventilation system of claim 1, wherein: the transverse interval between the two jet flow fans of each jet flow fan set is 1.96 m.
4. The spiral tunnel ventilation system of claim 1, wherein: the center of each group of jet fan units deviates 0-0.5m towards the inner side of the spiral center line of the spiral tunnel.
5. The spiral tunnel ventilation system of claim 1, wherein: and a distance of 15cm is arranged between the bottom of the jet fan set and a building limit in the spiral tunnel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921659283.5U CN210460730U (en) | 2019-09-30 | 2019-09-30 | Spiral tunnel ventilation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921659283.5U CN210460730U (en) | 2019-09-30 | 2019-09-30 | Spiral tunnel ventilation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210460730U true CN210460730U (en) | 2020-05-05 |
Family
ID=70435731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921659283.5U Expired - Fee Related CN210460730U (en) | 2019-09-30 | 2019-09-30 | Spiral tunnel ventilation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210460730U (en) |
-
2019
- 2019-09-30 CN CN201921659283.5U patent/CN210460730U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200505 Termination date: 20200930 |