Tunnel cover for a tunnel for controlled ventilation of gas
OwnerMaria Kumm, Anders Bergqvistinventors
Life of this patent
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Abstract
A system, in accordance with the invention, relates to ventilating a tunnel 1 in the event of fire or emission of gases C or aerosols. The system comprises a tunnel cover 20 and a mobile fan 21. The tunnel cover 20 has an opening 29 through which the fan 21 blows air. This increases the static pressure at the cover 20, which change the direction of air at a desired direction. One of the advantages of the invention is that the tunnel cover 20 makes it possible to utilise considerably smaller mobile fans 21 to ventilate a tunnel 1 in the event of fire or emission of gases than when using earlier known techniques.
Claims10
A device for facilitating a sufficiently large flow (25) to be generated through a tunnel in order to ventilate smoke, combustion gases, unhealthy gases or aerosols from the tunnel, the device comprises an essentially airtight membrane (20), which is intended to cover the most of a mouth of the tunnel (22) at a fire, the device comprises an opening (29) in the membrane (20) where the size of the opening (29), to all intents and purposes, is the same size as that of a front area of at least one mobile fan (21), which is intended to be positioned at one side of the membrane (20) and the at least one mobile fan (21) is intended to generate a flow of air through the opening (29).
A system for ventilation of a tunnel in the event of fire, the system generating a sufficiently large flow (25) through the tunnel to ventilate the tunnel from smoke, combustion gases, unhealthy gases or aerosols which system comprises:
- an essentially airtight membrane (20) intended to cover the greater part of one of the mouth of a tunnel (22);
- at least one mobile fan (21), intended to be positioned on one side of the membrane (20);
- an opening (29) in the membrane (20) where the size of the opening (29), to all intents and purposes, is the same as the front area of the at least one mobile fan (21) intended to generate a flow through the opening (29).
A method to generate a sufficiently large flow (25) through a tunnel in order to ventilate the tunnel of smoke, combustion gas, unhealthy gases or aerosols characterized by
- mounting (30) an essentially airtight membrane (20) in the tunnel such the membrane covers the greater part of one mouth of the tunnel (22);
- positioning (31) at least one mobile fan (21) at an opening (29) in the membrane (21);
- establishing (32) an airflow by means of the at least one mobile fan (21) through the opening (29) where the size of the opening (29), to all intents and purposes, is the same as the front area of the at least one mobile fan (21).
Dependencies are inferred from the claim text.