Tunnel lining trolley with ventilation pipe capable of smoothly passing through

Abstract

The invention provides a tunnel lining trolley with a ventilation pipe capable of smoothly passing through. The tunnel lining trolley comprises a main portal frame, a guide pipe allowing the ventilation pipe to penetrate through and a smoothing assembly, the guide pipe is installed on the main portal frame, the smoothing assembly comprises a plurality of pulleys, the multiple pulleys are arranged in the circumferential direction of the guide pipe, one pulley can rotate around one rotating shaft, the rotating shaft is arranged on the pipe wall of the guide pipe, the axis of the rotating shaft is tangent to the pipe wall, and the peripheral wall of each pulley protrudes out of the peripheral face of an inner hole of the pipe wall. According to the tunnel lining trolley with the ventilation pipe capable of smoothly passing through, the ventilation pipe can be prevented from being scratched and abraded when passing through the tunnel lining trolley, the ventilation pipe is free of bending wrinkles, the service life of the ventilation pipe is prolonged, the ventilation effect is good, the resistance between the guide pipe and the ventilation pipe can be greatly reduced, so that the ventilation pipe can smoothly and stably pass through the tunnel lining trolley, the flexibility is good, and operation is simple and convenient.

Description

technical field [0001] The invention relates to the technical field of tunnel construction equipment, in particular to a tunnel lining trolley through which ventilation pipes can pass smoothly. Background technique [0002] During the construction of the tunnel, in order to meet the construction requirements of supplying fresh air to the interior of the tunnel, removing harmful gases, steam, dust, gun smoke and other harmful substances, and making the temperature, relative humidity and flow velocity of the air inside the tunnel meet the specified standards, the tunnel adopts ventilation. The construction ventilation is carried out to the inside of the tunnel in the form of a combination of machine and ventilation duct, especially in the construction process of long and extra-long tunnels. The tunnel construction ventilation has played a vital role in determining the overall construction organization. In the adverse geological construction of special toxic and harmful gases s...

AI Technical Summary

Problems solved by technology

Since the tunnel lining trolley is a special equipment that can be moved forward at any time, every movement of the tunnel lining trolley involves the hanging scheme of the overlapping section of the ventilation pipe 13 and the tunnel lining trolley and the side wall or vault of the tunnel 11. Make adjustments, every time you adjust, you need to stop the wind (the air pressure in the ventilation pipe 13 is relatively high during normal ventilation, and the ventilation pipe 13 is in a high-pressure bulging state as a whole, so it is necessary to stop the wind to make the ventilation pipe 13 soft before hanging Adjustment) can be operated, thus affecting the ventilation effect of the tunnel 11 construction, especially in the adverse geological construction with high gas, hydrogen sulfide and other special toxic and harmful gases, the stop of the ventilation pipe 13 will inevitably lead to a rapid increase in safety risks, which is very easy to cause serious safety accident

[0004] In addition, when the ventilation pipe 13 passes through the tunnel lining trolley, the ventilation pipe 13 has folded sections 131 at both ends of the tunnel lining trolley, which leads to a change in the ventilation cross section, resulting in a significant increase in the local wind resistance of the ventilation pipe 13 and loss of air volume. Many, affecting the ventilation effect of tunnel 11 construction

Moreover, as the construction frequency increases, the damage rate of the folded section 131 existing after the ventilation pipe 13 passes through the tunnel lining trolley is extremely high, which in turn leads to an increase in the air leakage rate and affects the ventilation effect of the construction of the tunnel 11

[0005] In addition, the diameter of the through hole of the existing tunnel lining trolley for the passage of the ventilation pipe 13 coincides with the diameter of the ventilation pipe 13, and the internal wind pressure of the ventilation pipe 13 is relatively high during ventilation, and the ventilation pipe 13 is in a high-pressure bulging state as a whole. Even if the air stop operation is performed every time the tunnel lining trolley moves, the elastic recovery fatigue phenomenon exists in the pipe wall of the ventilation pipe 13, which makes it difficult for the pipe wall of the ventilation pipe 13 to return to the original diameter, so that the ventilation pipe 13 and the tunnel There is resistance friction between the through holes of the lining trolley, and under the action of the ventilation pipe 13 under its own gravity, there is also resistance friction between the bottom of the ventilation pipe 13 and the through hole of the tunnel lining trolley, which causes the tunnel lining trolley to be relatively The movement of the ventilation pipe 13 is not smooth enough, or even blocked

Images