Cold-proof adjusting type combined air valve for subway ventilation in severe cold area and control method of cold-proof adjusting type combined air valve

Abstract

The cold-proof adjusting type combined air valve for subway ventilation in the severe cold area is arranged in a piston air duct, an exhaust duct and a fresh air duct of a subway and comprises a plurality of valve body modules, two sets of actuators and a transmission mechanism, each valve body module comprises a valve body frame and two layers of single valve plates, each valve body frame is a rectangular frame, and the valve body frames are arranged in the valve body frames. The two layers of single valve plates form a double-layer valve body cavity in the middle of the valve body module, and a plurality of actuators and transmission mechanisms are arranged on the two sides of the double-layer multi-cavity combined valve body respectively. Therefore, the adjusting performance is high, adjusting under the small-air-volume working condition is closer to the linear adjusting characteristic, the occupied area is small, the appropriate fresh air volume is provided for green energy-saving products in winter, and the purposes of saving ventilation energy consumption and improving the comfort level in the station are achieved; the sealing effect is good due to the double-layer design and the multi-cavity design, and the electric heat preservation energy consumption of subway stations and intervals in winter in severe cold areas is reduced; in summer, entering of outdoor high-temperature air is reduced, and the comfort level in the station is improved.

Description

technical field [0001] The invention relates to the technical field of subway ventilation, in particular to a cold-proof and adjustable combined air valve for subway ventilation in severe cold areas and a control method thereof. Background technique [0002] In recent years, my country's subway construction has exploded, but the subway construction has not yet reached a saturation state, and a large number of lines are under construction and planning. The subway environmental control system is an important equipment system related to passenger comfort, fire and smoke exhaust safety and operating energy consumption. The environmental control system is closely related to the regional climate characteristics, especially the severe cold climate will have a huge impact on it. When the subway train runs in the tunnel, the air in the tunnel is driven by the train and flows in the direction of the train. This phenomenon is called the piston action of the train, and the air flow form...

AI Technical Summary

Problems solved by technology

During the daytime subway operation period, on the basis of meeting the fresh air volume requirements of the station and tunnel, the air exchange between the station, tunnel and outside the station should be reduced as much as possible. The combined air valve installed in the piston air duct is opened at a certain angle to maintain the fresh air volume of the station. The combined air valve in the piston air duct has poor adjustment accuracy and is difficult to adjust. Often, the piston air is too large or too small, causing frost damage at the station or the carbon dioxide concentration of the station exceeds the standard; after the subway stops operating at night, the outdoor temperature is much lower than during the day. The station basically has no demand for fresh air volume. At this time, the piston air shafts, fresh air shafts, and exhaust air shafts at both ends of the station should be closed to avoid air exchange between the station and the outside. However, the combined air valves used in the air ducts have poor sealing performance and serious air leakage. , the effect of cold protection is poor

In summer in severe cold regions, when the temperature outside the station is higher than the design temperature inside the station, it is necessary to adopt a closed operation mode, which needs to reduce the air exchange between the station and the outside, and control the size of the piston wind. At present, the combined air valve in the air duct has poor adjustment performance and is difficult To achieve the adjustment effect of closed operation in summer

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