Ventilation system and ventilation method for natural ventilation of ultra-long electrified railway
A technology of ventilation flow and tunnel ventilation, applied in mine/tunnel ventilation, earth-moving drilling, mining equipment, etc., can solve the problems of difficult maintenance, high operating cost, high cost of power cables, and reduce exhaust back pressure. Effect
Active Publication Date: 2020-11-06
CHINA RAILWAY FIRST SURVEY & DESIGN INST GRP
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Problems solved by technology
[0003] However, the cost of power cables for mechanical ventilation equipment in plateaus or mountainous areas is high, the operating cost is high, and maintenance is also difficult
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[0027] In order to more clearly understand the above objects, features and advantages of the present disclosure, the solutions of the present disclosure will be further described below. It should be noted that, in the case of no conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other.
[0028] In the following description, many specific details are set forth in order to fully understand the present disclosure, but the present disclosure can also be implemented in other ways than described here; obviously, the embodiments in the description are only some of the embodiments of the present disclosure, and Not all examples.
[0029] refer to Figure 1 to Figure 3 , figure 1 It is a schematic structural diagram of a tunnel ventilation system in an embodiment of the present disclosure, figure 2 for figure 1 The schematic diagram when the one-way damper 200 of the middle tunnel ventilation system is opened, image ...
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The invention relates to the technical field of tunnel ventilation, in particular to a ventilation system and ventilation method for natural ventilation of an ultra-long electrified railway. The tunnel ventilation system is used for assisting the operation ventilation of a tunnel, and comprises an auxiliary air duct and a damper device; a first end of the auxiliary air duct communicates with the tunnel from the middle side of the tunnel, a second end communicates with the external environment, and a ventilation flow path is formed by the auxiliary air duct and the tunnel; and the damper deviceis arranged at the connection part of the auxiliary air duct and the tunnel, the damper device is normally closed to close the ventilation flow path, and the damper device can be opened actively or passively under the action of air pressure difference on both sides to open the ventilation flow path. The auxiliary air duct is arranged in the middle of the tunnel, when a train enters the tunnel, the piston wind can be discharged from the other end of the tunnel, and can further is discharged from the auxiliary air duct, and the exhaust back pressure is reduced; and after the train passes through the auxiliary air duct, the fresh air can enter the tunnel from a tunnel entrance behind the train, and can also enter the tunnel from the auxiliary air duct, and the effective ventilation of the long tunnel is facilitated.
Description
technical field [0001] The present disclosure relates to the technical field of tunnel ventilation, in particular to a ventilation system and a ventilation method for natural ventilation of super-long electrified railways. Background technique [0002] For longer tunnels, the natural wind flow formed by the height difference between the two openings cannot achieve effective ventilation, and mechanical ventilation is required to assist ventilation. As stipulated in the railway technical regulations, mechanical ventilation should be installed when the length of the tunnel passed by electric locomotives is greater than 15km (passenger and freight) / 20km (passenger cars). Mechanical ventilation is to use a fan to blow in fresh air at one end of the tunnel, dilute and squeeze out the dirty air along the longitudinal direction of the tunnel. Longer tunnels should be ventilated at least once a day. [0003] However, the cost of power cables for mechanical ventilation equipment in ...
Claims
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IPC IPC(8): E21F1/00E21F1/10E21F1/12
CPCE21F1/003E21F1/10E21F1/12
Inventor 李国良陈绍华郭利民刘国庆陈敬军朵生君魏军政张小泽张旭珍
Owner CHINA RAILWAY FIRST SURVEY & DESIGN INST GRP