A protection device and method for automatic air adjustment protection of tunneling head interval series ventilation

Abstract

The invention relates to automatic air regulation protective device and method for interval series ventilation of a heading end. The device comprises more than two local fans, a flexible air barrel, a differential pressure transmitter and a variable-frequency comprehensive control module; the local fans are connected in series by the flexible air barrel, the positive pressure end of the differential pressure transmitter stretches to the front of the exhaust inlet of the succeeding local fan in the prior flexible air barrel, and the negative pressure end of the differential pressure transmitter is arranged outside the flexible air barrel; and the differential pressure transmitter is connected with the variable-frequency comprehensive control module, and the variable-frequency comprehensive control module is connected with the local fans. According to the method, the local fans are started, the differential pressure transmitter is used for measuring the pressure difference of the positive pressure end and the negative pressure end, the pressure difference is transmitted to the variable-frequency comprehensive control module for processing pressure difference data, and the air volume of the serially-connected local fans can be automatically controlled by changing the frequency of the serially-connected local fans. The device can avoid sinkage or collapse of the flexible air barrel, so as to guarantee the safety of the local fans, extend the local ventilating and air supply distance and improve the air supply quality and safety of a driving working face.

Description

technical field [0001] The invention relates to an automatic air regulation protection device and method for interval series ventilation of driving heads, in particular to an automatic air adjustment protection device and method for interval series ventilation of excavation heads in long-distance single-head roadways in mine and tunnel engineering. Background technique [0002] During the construction of mine roadways and engineering tunnels, especially during the mine development period, it is usually necessary to excavate long-distance single-headed roadways (tunnels). Due to the long ventilation distance, a single local fan cannot overcome the ventilation resistance along the way. Usually, a series of 2 Ventilation with local ventilators above the platform and above. According to the layout of local fans, it can be divided into centralized series ventilation and interval series ventilation. It is widely used because the spaced series connection has less air leakage than ...

AI Technical Summary

Problems solved by technology

However, in these two methods, the latter stage local ventilator will inhale the dirty air after washing the excavation face, which contains dust and toxic and harmful gases, causing the dirty air to circulate in the excavation face, reducing the air supply quality of the face, which is not conducive to Safe Production

Images