Air drafting device in tunnel construction
The utility model discloses an air drafting device in tunnel construction. The air drafting device in tunnel construction comprises a pressing type ventilator placed on a tunnel portal and a vent line communicated with an air outlet of the pressing type ventilator. The vent line stretches in the len...
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The utility model discloses an air drafting device in tunnel construction. The air drafting device in tunnel construction comprises a pressing type ventilator placed on a tunnel portal and a vent line communicated with an air outlet of the pressing type ventilator. The vent line stretches in the length direction of a tunnel. A spiral air flue stretching in the length direction of the tunnel is formed in the inner wall of the vent line. Compared with the prior art, the air drafting device in tunnel construction has the advantages of being high in strength, convenient to machine, good in air drafting and saving in materials and auxiliary devices. |
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