Blade-type mechanical regulating device for air outlet of air duct on coal mine comprehensive tunneling working face

Abstract

The invention discloses a blade-type mechanical regulating device for an air outlet of an air duct on a coal mine comprehensive tunneling working face. The blade-type mechanical regulating device comprises the blade-type air duct, a dial hanging top frame, an I-shaped sliding rail and a one-way sliding trolley. The one-way sliding trolley is arranged on the I-shaped sliding rail. The top of the dial hanging top frame is fixedly connected with the bottom of the one-way sliding trolley. The blade-type air duct penetrates through the dial hanging top frame and comprises an air outlet adjusting duct, a blade connecting ring, an air duct main body, a framework air duct and a flexible air duct which are arranged sequentially. The air outlet adjusting duct comprises a plurality of diameter adjusting outer blades, a distance is reserved between every two adjacent diameter adjusting outer blades, and a diameter adjusting inner blade is arranged on the inner side of the space between every two adjacent diameter adjusting outer blades. A horizontal steering mechanism is arranged between the air duct main body and the dial hanging top frame. Gas and dust accumulation during tunneling ventilation can be reduced, the ventilation efficiency is improved, and the healthy and comfortable ventilation environment is created in a movement area for downhole personnel.

Description

technical field [0001] The invention relates to a control device for an air outlet, in particular to a blade-type mechanical control device for an air outlet of a coal mine fully mechanized excavation face. Background technique [0002] Ventilation of tunneling working face is an important part of coal mine safety production, and it undertakes the important responsibility of preventing coal dust and gas explosion, reducing the harm of coal dust to miners and providing a comfortable working environment. With the improvement of excavation scale and degree of mechanization and the increasing emphasis on coal mine safety and miners' working environment, the fine management of ventilation in excavation working face has become more and more important. Realizing safe, energy-saving and green ventilation in excavation working face is the current green mine construction. one of the important parts. [0003] The excavation face is a one-headed roadway, and the ventilation circuit is ...

AI Technical Summary

Problems solved by technology

However, when the air volume is constant, the resistance loss along the air duct, the wind speed at the air outlet, and the effective range are different at different stages of excavation. As the tunnel continues to extend, the resistance along the air duct increases, and the wind energy loss also increases. Air flow at the end of the effective range of ventilation is often not effective in diluting gas and dust accumulation

At the same time, the structure of the air outlet of the air duct is too simple, the direction and angle of the air outlet cannot be changed, and the diameter and front-to-back distance cannot be dynamically changed at any time, resulting in serious accumulation of gas and dust in the dead zone

[0004]Insufficient air volume or unreasonable distribution will not only cause local gas and coal dust to exceed the standard in the excavation working face, but also bring hidden dangers of gas and coal dust explosion to the excavation working face

Moreover, it will also cause the dust concentration in the area where the miners are active to exceed the standard, resulting in a high rate of pneumoconiosis in the excavation face

On the other hand, excessive air volume is not conducive to energy saving requirements, but also has a negative impact on the working environment of miners. There have been cases where miners' helmets were blown away due to excessive air volume and excessive wind on the neck caused physical discomfort. and other phenomena

All this shows that the current ventilation management method can no longer fully meet the ventilation needs of long-distance and large-section excavation in fully mechanized excavation working faces

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