CN209818098U - Natural ventilation system for long and large tunnel shaft - Google Patents
Natural ventilation system for long and large tunnel shaft Download PDFInfo
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- CN209818098U CN209818098U CN201920649177.2U CN201920649177U CN209818098U CN 209818098 U CN209818098 U CN 209818098U CN 201920649177 U CN201920649177 U CN 201920649177U CN 209818098 U CN209818098 U CN 209818098U
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Abstract
The utility model discloses a tunnel shaft natural ventilation system grows up belongs to tunnel ventilation system technical field. The air supply system comprises an air exhaust vertical shaft, an air exhaust connecting air channel, an air exhaust guide vane grid, an air exhaust fan device, an air supply vertical shaft, an air supply connecting air channel, an air supply guide vane grid and an air supply fan device. In winter and summer, the air of the mountain top and the tunnel has temperature difference, so that a hot pressing effect is generated, natural ventilation is formed, part of the axial flow fan stops running, energy is saved, and fresh air of the mountain top is sent into the tunnel or polluted air in the tunnel is exhausted from the mountain top by utilizing the natural ventilation generated by the hot pressing effect.
Description
Technical Field
The utility model relates to a tunnel shaft natural ventilation system grows up belongs to tunnel ventilation system technical field.
Background
The long tunnel is a tunnel with long length and large section, and a ventilation system is required to be installed in the tunnel to keep the internal airflow smooth. The existing long and large highway tunnel generally adopts a power ventilation system, and the existing ventilation system continuously operates and can always generate energy consumption. In winter and summer, the temperature difference is generated between the air inside and outside the tunnel vertical shaft, and natural air convection can be caused by the temperature difference. Therefore, in order to save energy, in an actual application environment, a tunnel natural ventilation system is designed, which can utilize the hot pressing effect caused by the temperature difference between the inside and the outside of the tunnel shaft in winter and summer to form tunnel natural ventilation and suspend the power ventilation system so as to reduce unnecessary energy consumption.
Disclosure of Invention
The utility model discloses the technical problem that will solve lies in: the utility model provides a tunnel shaft natural ventilation system grows up, it has solved present winter and summer season, and tunnel ventilation system grows up also needs work all the time, carries out tunnel ventilation, leads to the extravagant problem of energy.
The utility model discloses the technical problem that will solve takes following technical scheme to realize:
a natural ventilation system for a long and large tunnel shaft comprises an air exhaust shaft, an air exhaust connecting air duct, an air exhaust guide vane grid, an air exhaust fan device, an air supply shaft, an air supply connecting air duct, an air supply guide vane grid and an air supply fan device;
the air exhaust shaft is vertically arranged in the mountain body, the top of the air exhaust shaft is provided with an air outlet higher than the mountain body, the bottom of the air exhaust shaft is communicated with the tunnel through an air exhaust communicating air duct, the air exhaust guide vane grid is fixed at the corner of the air exhaust shaft and the air exhaust communicating air duct, and the air exhaust fan device is arranged in the air exhaust communicating air duct;
the air supply shaft is vertically arranged in the mountain body, an air supply outlet higher than the mountain body is arranged at the top of the air supply shaft, the bottom of the air supply shaft is communicated with the tunnel through an air supply connecting air channel, an air supply guide vane grid is fixed at the corner of the air supply shaft and the air supply connecting air channel, and an air supply fan device is arranged in the air supply connecting air channel;
the exhaust fan device and the air supply fan device are identical in structure and are formed by sequentially connecting an air valve, a current collector, an axial flow fan, a diffusion cylinder and a silencer, wherein two ends of the axial flow fan are respectively connected with the current collector and the diffusion cylinder through flexible connecting pipes.
As a preferred example, one end of the silencer of the exhaust fan device faces the exhaust shaft.
As a preferred example, one end of the muffler of the air supply fan device faces the air supply vertical shaft.
As a preferable example, the tops of the air outlet and the air supply outlet are provided with conical rain-proof covers.
In summer, the axial flow fan of the air supply fan device stops running, energy is saved, and the axial flow fan of the air exhaust fan device continuously runs. Air supply process: the temperature of the mountain top where an air supply outlet of the air supply vertical shaft is located is high, the temperature of the bottom of the air supply vertical shaft is low, an air valve of an air supply fan device is opened by utilizing the hot pressing effect generated by temperature difference, an air supply passage for natural ventilation is opened, and clean air of the mountain top is sent into a main tunnel of the travelling crane; air exhaust process: the polluted air in the tunnel is exhausted from the air exhaust vertical shaft by opening the axial flow fan of the air exhaust fan device.
In winter, the axial flow fan of the exhaust fan device stops running, energy is saved, and the axial flow fan of the air supply fan device continuously runs. Air exhaust process: because the temperature of the mountain top where the air outlet of the air exhaust vertical shaft is located is low, and the temperature of the bottom of the air exhaust vertical shaft is high, the air valve of the air exhaust fan device is opened by utilizing the hot pressing effect generated by the temperature difference, the air exhaust passage of natural ventilation is opened, and the polluted air of the main tunnel of the travelling crane is exhausted from the air exhaust vertical shaft; air inlet process: the new air in the tunnel is introduced from the air supply vertical shaft by starting the axial flow fan of the air inlet fan device.
The utility model has the advantages that: in winter and summer, the air of the mountain top and the tunnel has temperature difference, so that a hot pressing effect is generated, natural ventilation is formed, part of the axial flow fan stops running, energy is saved, and fresh air of the mountain top is sent into the tunnel or polluted air in the tunnel is exhausted from the mountain top by utilizing the natural ventilation generated by the hot pressing effect.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of an air supply fan device;
fig. 3 is a schematic structural diagram of an air outlet and a conical rain-proof cover.
In the figure: the air-conditioning system comprises an air exhaust vertical shaft 1, an air exhaust connecting air duct 2, an air exhaust guide vane grid 3, an air exhaust fan device 4, an air supply vertical shaft 5, an air supply connecting air duct 6, an air supply guide vane grid 7, an air supply fan device 8, a mountain body 9, an air outlet 10, an air supply outlet 11, an air valve 12, a current collector 13, an axial flow fan 14, a diffusion cylinder 15, a silencer 16, a flexible connecting pipe 17 and a conical rain cover 18.
Detailed Description
In order to make the technical means, the creation features, the achievement purposes and the functions of the present invention easy to understand and understand, the present invention is further explained by combining the following specific drawings.
As shown in fig. 1-3, a vertical shaft natural ventilation system for a long and large tunnel comprises an exhaust vertical shaft 1, an exhaust connecting air passage 2, an exhaust guide vane grid 3, an exhaust fan device 4, an air supply vertical shaft 5, an air supply connecting air passage 6, an air supply guide vane grid 7 and an air supply fan device 8;
the air exhaust shaft 1 is vertically arranged in a mountain body 9, the top of the air exhaust shaft 1 is provided with an air exhaust port 10 higher than the mountain body 9, the bottom of the air exhaust shaft 1 is communicated with a tunnel through an air exhaust connecting air duct 2, an air exhaust guide vane grid 3 is fixed at the corner of the air exhaust shaft 1 and the air exhaust connecting air duct 2, and an air exhaust fan device 4 is arranged in the air exhaust connecting air duct 2;
the air supply shaft 5 is vertically arranged in the mountain body 9, the top of the air supply shaft 5 is provided with an air supply outlet 11 higher than the mountain body 9, the bottom of the air supply shaft 5 is communicated with the tunnel through an air supply connecting air duct 6, an air supply guide vane grid 7 is fixed at the corner of the air supply shaft 5 and the air supply connecting air duct 6, and an air supply fan device 8 is arranged in the air supply connecting air duct 6;
the exhaust fan device 4 and the air supply fan device 8 have the same structure, and are formed by sequentially connecting an air valve 12, a current collector 13, an axial flow fan 14, a diffusion cylinder 15 and a silencer 16, wherein two ends of the axial flow fan 14 are respectively connected with the current collector 13 and the diffusion cylinder 15 through a flexible connecting pipe 17.
One end of the silencer 16 of the exhaust fan device 4 faces the exhaust shaft 1.
The muffler 16 of the blower fan device 8 faces the blower shaft 5 at one end.
Air exit 10, 11 tops of supply-air outlet are equipped with the rain-proof cover of toper 18, all leave the space between the rain-proof cover of toper 18 and air exit 10, between the rain-proof cover of toper 18 and the supply-air outlet 11, are convenient for the air flow.
The air exhaust guide vane cascade 3 and the air supply guide vane cascade 7 both adopt arc-shaped guide vane cascades, the airflow direction at the right-angle corner is smoothly changed, the air resistance is reduced, and the flow velocity loss is reduced.
The working principle is as follows:
air density changes are caused by temperature difference of outside air in the tunnel shaft, and air flow hot pressing is generated among ventilation openings with different heights of the shaft due to temperature changes, so that air in the shaft flows naturally. Specifically, a place with high temperature in the air generates higher pressure than a place with low temperature, the airflow tends to flow to a place with low pressure, and when the pressure is affected by the temperature difference between the upper end and the lower end of the vertical shaft, and the pressure balance between the upper end and the lower end of the vertical shaft is broken, natural flow is generated.
In summer, the axial flow fan 14 of the air supply fan device 8 stops operating, so that energy is saved, and the axial flow fan 14 of the exhaust fan device 4 continuously operates. Air supply process: the temperature of the mountain top where the air supply outlet 11 of the air supply vertical shaft 5 is positioned is higher, the temperature of the bottom of the air supply vertical shaft 5 is lower, the air valve 12 of the air supply fan device 8 is opened by utilizing the hot pressing effect generated by the temperature difference, the air supply passage of natural ventilation is opened, and clean air at the mountain top is sent into the main driving tunnel; air exhaust process: the polluted air in the tunnel is discharged from the exhaust shaft 1 by turning on the axial fan 14 of the exhaust fan device 4.
In winter, the axial flow fan 14 of the exhaust fan device 4 stops operating, so that energy is saved, and the axial flow fan 14 of the air supply fan device 8 continuously operates. Air exhaust process: because the temperature of the mountain top where the air outlet 10 of the air exhaust vertical shaft 1 is located is low, and the temperature of the bottom of the air exhaust vertical shaft 1 is high, the hot pressing effect generated by the temperature difference is utilized to open the air valve 12 of the air exhaust fan device 4, open the air exhaust passage of natural ventilation and exhaust the polluted air of the main tunnel of the traveling crane from the air exhaust vertical shaft 1; air inlet process: the tunnel fresh air is introduced from the air supply shaft 5 by starting the axial flow fan 14 of the air inlet fan device 8.
In winter and summer, the air of the mountain top and the tunnel has temperature difference, so that a hot pressing effect is generated, natural ventilation is formed, part of the axial flow fan 14 stops running, energy is saved, and fresh air of the mountain top is sent into the tunnel or polluted air in the tunnel is exhausted from the mountain top by utilizing the natural ventilation generated by the hot pressing effect.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that various changes and modifications may be made without departing from the spirit and scope of the invention, and such changes and modifications fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. A long and large tunnel shaft natural ventilation system is characterized by comprising an air exhaust shaft, an air exhaust connecting air channel, an air exhaust guide vane grid, an air exhaust fan device, an air supply shaft, an air supply connecting air channel, an air supply guide vane grid and an air supply fan device;
the air exhaust shaft is vertically arranged in the mountain body, the top of the air exhaust shaft is provided with an air outlet higher than the mountain body, the bottom of the air exhaust shaft is communicated with the tunnel through an air exhaust communicating air duct, the air exhaust guide vane grid is fixed at the corner of the air exhaust shaft and the air exhaust communicating air duct, and the air exhaust fan device is arranged in the air exhaust communicating air duct;
the air supply shaft is vertically arranged in the mountain body, an air supply outlet higher than the mountain body is arranged at the top of the air supply shaft, the bottom of the air supply shaft is communicated with the tunnel through an air supply connecting air channel, an air supply guide vane grid is fixed at the corner of the air supply shaft and the air supply connecting air channel, and an air supply fan device is arranged in the air supply connecting air channel;
the exhaust fan device and the air supply fan device are identical in structure and are formed by sequentially connecting an air valve, a current collector, an axial flow fan, a diffusion cylinder and a silencer, wherein two ends of the axial flow fan are respectively connected with the current collector and the diffusion cylinder through flexible connecting pipes.
2. The natural ventilation system for the long and large tunnel shaft according to claim 1, wherein one end of the muffler of the exhaust fan device faces the exhaust shaft.
3. The natural ventilation system for the long and large tunnel shaft according to claim 1, wherein one end of the muffler of the air supply fan device faces the air supply shaft.
4. The natural ventilation system for the long and large tunnel shaft according to claim 1, wherein a conical rain cover is arranged at the top of the air outlet and the air supply outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920649177.2U CN209818098U (en) | 2019-05-08 | 2019-05-08 | Natural ventilation system for long and large tunnel shaft |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920649177.2U CN209818098U (en) | 2019-05-08 | 2019-05-08 | Natural ventilation system for long and large tunnel shaft |
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| Publication Number | Publication Date |
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| CN209818098U true CN209818098U (en) | 2019-12-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920649177.2U Active CN209818098U (en) | 2019-05-08 | 2019-05-08 | Natural ventilation system for long and large tunnel shaft |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111648810A (en) * | 2020-06-10 | 2020-09-11 | 上海进贤机电科技有限公司 | Wind tower type air purification system for urban tunnel |
| CN112879069A (en) * | 2021-01-25 | 2021-06-01 | 北京工业大学 | Model test device for researching internal airflow characteristics of high and large vertical shaft |
| CN114017091A (en) * | 2021-10-11 | 2022-02-08 | 北京市水利规划设计研究院 | Ventilation control system for tunnel and tunnel ventilation method |
-
2019
- 2019-05-08 CN CN201920649177.2U patent/CN209818098U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111648810A (en) * | 2020-06-10 | 2020-09-11 | 上海进贤机电科技有限公司 | Wind tower type air purification system for urban tunnel |
| CN112879069A (en) * | 2021-01-25 | 2021-06-01 | 北京工业大学 | Model test device for researching internal airflow characteristics of high and large vertical shaft |
| CN114017091A (en) * | 2021-10-11 | 2022-02-08 | 北京市水利规划设计研究院 | Ventilation control system for tunnel and tunnel ventilation method |
| CN114017091B (en) * | 2021-10-11 | 2023-08-11 | 北京市水利规划设计研究院 | Ventilation control system for tunnel and tunnel ventilation method |
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