一种城市地下铁路站厅排风道夹层结构
By setting up independent air intake and exhaust ducts in the ventilation ducts of urban subway station halls, and equipping them with fireproof, soundproof, heat-insulating, and partition mechanisms, the air pollution problem caused by the shared air intake and exhaust channels is solved, air cleanliness is improved, and fire safety is enhanced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG CONSTR ENG GRP
- Filing Date
- 2025-07-08
- Publication Date
- 2026-07-17
AI Technical Summary
In the existing design of ventilation ducts in urban underground railway station halls, the air intake and exhaust share a single channel, which leads to cross-contamination of air within the duct and reduces the cleanliness of the air delivered into the station hall.
The structure employs two symmetrical vertical air duct panels on the main plate, with an air duct partition fixed between them, forming two independent air duct spaces for air intake and exhaust respectively. Combined with fireproof, soundproof, heat-insulating, and partitioning mechanisms, it ensures air cleanliness and forms a physical barrier in the event of a fire.
It effectively reduces cross-contamination of incoming and outgoing air within the duct, improves the cleanliness of the air supplied to the station hall, and reduces the spread of noise and heat during a fire, thus enhancing safety.
Smart Images
Figure CN224514657U_ABST
Abstract
Claims
1. A sandwich structure of a ventilation duct of a station hall of an urban subway, comprising a structural middle plate (1), characterized in that: Two symmetrical air duct plates (2) are fixed on the middle plate (1) of the structure. An air duct partition (3) is fixed between the two air duct plates (2). A structural top plate (6) is fixed at the end of the two air duct plates (2) away from the middle plate (1). Fireproof and soundproof mechanisms (4) are provided on both the air duct partition (3) and the air duct plates (2). A fireproof partition mechanism (5) is provided between the two air duct plates (2).
2. The air duct mezzanine structure of a city underground railway station hall according to claim 1, characterized in that: The fireproof and soundproof mechanism (4) includes a soundproof layer (41) fixed on the air duct plate (2) and the air duct partition (3), a heat insulation layer (42) fixed on the soundproof layer (41), and a fireproof wall surface (43) fixed on the heat insulation layer (42).
3. The mezzanine structure of a ventilation duct of a station hall of an urban subway according to claim 2, characterized in that: The sound insulation layer (41) is a sound-absorbing foam layer with a density ≥80kg / m³ and a thickness of 30mm.
4. The air duct mezzanine structure of a city underground railway station hall according to claim 3, characterized in that: The insulation layer (42) is a polyurethane foam layer with a thermal conductivity of ≤0.022W / m·K and a thickness of 20mm.
5. The mezzanine structure of a ventilation duct of a station hall of an urban subway according to claim 4, characterized in that: The fireproof wall surface (43) is a magnesium fireproof board with a fire resistance limit of ≥120min.
6. The mezzanine structure of a ventilation duct of a station hall of an urban subway according to claim 2, characterized in that: The fireproof partition mechanism (5) includes several partition plates (51) set on the upper and lower sides of the air duct partition (3). One end of the partition plate (51) is rotatably connected to the fireproof wall surface (43) between the two air duct plates (2). One end of the partition plate (51) is fixed with a rubber partition rod (52). One end of the rubber partition rod (52) is provided with a limiting plate (53). The limiting plate (53) is provided with a limiting groove. The rubber partition rod (52) is located in the limiting groove. The limiting plate (53) is rotatably connected to the fireproof wall surface (43). A fixing component (54) is provided on one side of the limiting plate (53).
7. The mezzanine structure of a ventilation duct of a station hall of an urban subway according to claim 6, characterized in that: The fixing component (54) includes a fixing rod (541) disposed on one side of the limiting plate (53). The limiting plate (53) has a fixing groove corresponding to the fixing rod (541). A fixing plate (542) is slidably connected to the fixing rod (541). The fixing plate (542) is fixedly connected to the fireproof wall surface (43).
8. The mezzanine structure of a ventilation duct of a station hall of an urban subway according to claim 7, characterized in that: A limiting spring (543) is provided between the fixing plate (542) and the fixing rod (541). Both ends of the limiting spring (543) are fixedly connected to the fixing rod (541) and the fixing plate (542). A limiting plate (544) is provided at one end of the fixing rod (541) that is fixed to the limiting spring (543). The limiting plate (544) is fixedly connected to the fireproof wall surface (43). A supporting wax rod (545) is fixed between the fixing rod (541) and the limiting plate (544).