Air supply system of long tunnel

Abstract

The invention discloses an air supply system of a long tunnel. The air supply system aims to solve the problem that the air supply volume and the air supply position in a traditional tunnel are not adjustable. According to the key points of the technical scheme, the air supply system of the long tunnel comprises a tunnel body, and an arch-shaped channel is arranged in the tunnel body; preformed holes are formed in the positions, near the channel, of the tunnel body in the length direction, and air outlets communicating with the channel are formed in the side walls of the preformed holes; a wind supply mechanism is disposed at the position, near the side wall of the channel, in the tunnel body, and the wind supply mechanism includes an air duct assembly disposed in the preformed holes; theend portion of the air duct assembly is connected with a draught fan, and the air duct assembly is provided with adjusting mechanisms for adjusting air volume of the air duct assembly; and the numberof the preformed holes is five and the preformed holes are equally distributed along the curved faces of the channel. According to the air supply system of the long tunnel, the adjustment of the air supply volume and the air supply position in the channel can be realized, and the application is more flexible.

Description

Technical field [0001] The invention relates to the field of tunnel construction, more specifically, it relates to an air supply system for a long tunnel. Background technique [0002] A good air condition in a traffic tunnel is a necessary condition for driving safety. Ventilation is to reduce the concentration of harmful gases or pollutants in the tunnel and ensure the safety and comfort of driving. Common ventilation methods in existing tunnels are as follows: 1. Natural ventilation. The so-called natural ventilation refers to the exhaust of harmful gases and smoke from the tunnel through the piston action of cars passing through the tunnel and the action of natural wind. The use of natural ventilation mode is limited by the amount of traffic in the tunnel, and the instability and complexity of natural wind will greatly affect the air exchange in the tunnel. 2. Longitudinal ventilation. The so-called longitudinal ventilation is a way of introducing fresh air from one opening ...

AI Technical Summary

Problems solved by technology

The use of natural ventilation mode is limited by the traffic flow in the tunnel, and the instability and complexity of natural wind will greatly affect the air exchange in the tunnel

2. Longitudinal ventilation. The so-called longitudinal ventilation is a way to introduce fresh air from one hole and discharge polluted air through another hole. In this way, the degree of air pollution increases linearly from the entrance to the exit. The pollution concentration inside is high, and in case of fire, the concentration at the exit will be high, and the smoke exhaust is inconvenient

However, the ventilation position of the above scheme is fixed, and the adjustment of ventilation volume and ventilation position cannot be realized.

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