Multi-stage pressurizing induction fan

Abstract

The invention discloses a multi-stage pressurizing induction fan. The multi-stage pressurizing induction fan comprises an induction fan body; the exterior of the induction fan body is an integral hollow induction fan shell; a duct dividing chamber is disposed in the induction fan shell to divide the space in the induction fan shell into an outer duct and an inner pressurizing duct; a main fan bodyis disposed at an air inlet of the left end of the outer duct and the inner pressurizing duct; and the right end of the main fan body is connected with a pressurizing screw rod of which the lead is gradually and regularly reduced from left to right. The main fan body drives the pressurizing screw rod to rotate, exterior air is sucked to form a flowing air flow, part of flowing air flow enters theouter duct and then is delivered out of an air delivery opening to input fresh air in a tunnel for replacement, part of flowing air flow enters the inner pressurizing duct, is compressed and pressurized stage by stage through the pressurizing screw rod and then is output, then the output air flow is high in pressure and long in delivery distance, and the replacing efficiency of the air in the tunnel is greatly improved.

Description

Technical field [0001] The invention relates to the technical field of ventilation implementation, in particular to a multi-stage booster induction fan. Background technique [0002] The tunnel is equipped with an induction fan to continuously input external air into the tunnel for air replacement, especially for long-distance tunnels such as Zhongnan Mountain in the Qinling Mountains. Multiple pipes outside the tunnel extend up to the top of the mountain for air transportation. However, the power setting of the induction fan is also It needs to be considered. The power is too large, the energy consumption is large, and the noise is large. The sent wind forms a fast airflow, which may pose an unsafe hazard to the cars passing in the tunnel. If the power of the induced fan is small, then the clean air in the tunnel will be replaced. The low effect will also cause the driver or passenger to have the hidden danger of insufficient oxygen and excessive inhalation of harmful gases and ...

AI Technical Summary

Problems solved by technology

[0002] The induced fan is installed in the tunnel to continuously input the external air into the tunnel for air replacement, especially in the long-distance tunnel of Qinling Zhongnan Mountain, the tunnel is connected with multiple pipes and extends upward to the top of the mountain for air transportation, but the power setting of the induced fan is also Need to take into account, the power is too large, the energy consumption is large, the noise is also large, the wind sent out forms a fast airflow, which may cause unsafe hidden dangers to the cars passing in the tunnel, and the power of the induced fan is small, so the replacement of clean air in the tunnel If the effect is low, it will also cause the driver or passengers to have the hidden danger of insufficient oxygen and excessive inhalation of harmful gases, which will cause physical discomfort. For this reason, a strong and weak compatible synchronous operation induction fan is needed

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