an underground ventilation system

Abstract

The invention discloses an underground ventilation system which comprises a main air duct, a plurality of branch air ducts, first-stage throttling orifice plate structures, first-stage differential pressure detection devices, second-stage throttling orifice plate structures and second-stage differential pressure detection devices. Each branch air duct is provided with a plurality of air openings;the first-stage throttling orifice plate structures are arranged between the main air duct and the branch air ducts, and each first-stage throttling orifice plate structure is provided with at least one first-stage throttling orifice; the first-stage differential pressure detection devices are used for detecting the differential pressure of the front sides and the rear sides of first-stage throttling orifice plates; the second-stage throttling orifice plate structures are arranged between the air ports and the branch air ducts where the air ports are located, and each second-stage throttling orifice plate structure is provided with at least one second-stage throttling orifice; and the second-stage differential pressure detection devices are used for detecting the differential pressure of the front sides and the rear sides of second-stage throttling orifice plates. The throttling orifice plate structures are easy to machine, low in cost, easy and convenient to install, free of quick-wear parts, reliable and durable in structure and long in service life, the airflow distribution accuracy can be guaranteed, and air volume distribution in the underground ventilation system can be monitored in real time.

Description

technical field [0001] The invention relates to the technical field of ventilation, in particular to an underground ventilation system. Background technique [0002] Due to the saving of building space or other special requirements in some projects, it is necessary to set the air duct underground, and install air outlets on the branch air ducts, so as to achieve the purpose of downward air supply or downward exhaust. Due to the large number of branch air ducts or air outlets, ordinary air valves cannot accurately distribute the air volume of each air outlet, and the air valves are installed underground, which is not easy to overhaul. Real-time grasp of air volume mismatch, the entire underground air duct system cannot achieve the design purpose of precise air volume distribution. Contents of the invention [0003] In view of this, the purpose of the present invention is to provide an underground ventilation system with reliable structure, precise air volume distribution a...

AI Technical Summary

Problems solved by technology

Due to the large number of branch air ducts or air outlets, ordinary air valves cannot accurately distribute the air volume of each air outlet, and the air valves are installed underground, which is not easy to overhaul. Real-time grasp of the air volume mismatch situation, the entire underground air duct system cannot achieve the design purpose of precise air volume distribution

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