Ventilation and smoke exhaust dual-purpose system of underground parking garage

Abstract

The utility model discloses a ventilation and smoke exhaust dual-purpose system of an underground parking garage in the technical field of civil air defense ventilation of underground garages, which comprises air supply outlets, the air supply outlets are respectively connected with normal air supply units, the air supply outlets are connected with a two-way ventilation unit through a general control gate valve, and the two-way ventilation unit is respectively connected with a cleaning unit and a poison filtering unit. In wartime, the usual air supply unit is closed, and the cleaning unit, the two-way ventilation unit and the master control gate valve are opened, so that ventilation of the underground parking garage is ensured. When gas filtering type ventilation is needed, the gas filtering unit is opened. In a normal state, only the normal air supply unit is opened, other units are closed, external air is supplied into the garage through the air supply outlet, and when a fire signal is received and the system needs to perform smoke exhaust and air supplement operation, the normal air supply amount of the air supply unit is reduced. Investment is saved, building space is saved, maintenance and management are facilitated, and meanwhile safety and reliability of the system are ensured.

Description

Technical Field

[0001] This utility model relates to a ventilation and smoke extraction system in the field of ventilation technology for underground garages and civil defense facilities. Background Technology

[0002] The ventilation system of an underground parking garage (also serving as a civil defense shelter) includes a peacetime air supply and exhaust system, a fire smoke extraction and smoke extraction makeup air system, and a wartime civil defense ventilation system. Based on the current pollutant levels in the underground garage, the peacetime ventilation system must remove both heavier-than-air vehicle exhaust fumes and lighter-than-air CO. However, due to structural limitations, in current engineering practice, exhaust vents are concentrated above the parking spaces. The wartime civil defense ventilation system and the fire smoke extraction and smoke extraction makeup air system are dedicated systems, only operational during wartime or fire emergencies, requiring only regular inspection and maintenance in peacetime. However, for smaller underground garages, installing independent ventilation and fire smoke extraction and smoke extraction makeup air systems is both prohibitively expensive and inconvenient to maintain and manage due to limited space. Utility Model Content

[0003] The purpose of this invention is to provide a ventilation and smoke extraction system for underground parking garages, which saves investment, saves building space, facilitates maintenance and management, and ensures the safety and reliability of the system.

[0004] To achieve the above objectives, this utility model provides a ventilation and smoke exhaust system for an underground parking garage, including air supply outlets, which are connected to a normal air supply unit. The air supply outlets are connected to a dual-path ventilation unit via a main control gate valve, and the dual-path ventilation unit is connected to a cleaning unit and a filtration unit, respectively.

[0005] Compared with existing technologies, the advantages of this invention are as follows: During wartime, the normal air supply unit is closed, while the cleaning unit, dual-path ventilation unit, and main control valve are opened to ensure ventilation in the underground parking garage. When filtered ventilation is required, the filtered unit is opened. In normal operation, only the normal air supply unit remains open, while all other units are closed, allowing outside air to be supplied into the garage through air vents. When a fire signal is received and the system needs to operate for smoke extraction and ventilation, the air supply volume of the normal air supply unit is reduced. This saves investment, reduces building space, facilitates maintenance and management, and ensures the safety and reliability of the system.

[0006] As a further improvement of this utility model, the normal air supply unit includes a sealed door, which is connected to the normal air supply fan, which is connected to the normal sealed valve, and the normal sealed valve is connected to the air outlet.

[0007] This allows the airtight doors and normally closed valves to be opened, and outside air to be supplied into the air outlets via a normal ventilation fan. In wartime, the airtight doors, normally closed valves, and normal ventilation fans are closed.

[0008] As a further improvement of this utility model, the cleaning unit includes a wave damper, which is connected to a coarse filter. The coarse filter is connected to a cleaning and sealing valve and a filtration unit, respectively. The cleaning and sealing valve is connected to a dual-path ventilation unit.

[0009] When cleaning and ventilation are needed, the dual-path ventilation unit is turned on. Outside air passes through the shock absorber to eliminate shock waves, and then passes through the coarse filter to filter large particles of impurities before being sent into the air outlet by the dual-path ventilation unit.

[0010] As a further improvement of this utility model, the dual-path ventilation unit includes a main ventilation gate valve and a backup ventilation gate valve. Both the main ventilation gate valve and the backup ventilation gate valve are connected to a clean and airtight valve. The main ventilation gate valve is connected to the main civil defense ventilation fan. The main civil defense ventilation fan is connected to the main ventilation check valve. The main ventilation check valve is connected to the main control gate valve. The backup ventilation gate valve is connected to the backup civil defense ventilation fan. The backup civil defense ventilation fan is connected to the backup ventilation check valve. The backup ventilation check valve is connected to the main control gate valve.

[0011] During cleaning and ventilation, simply open any ventilation gate valve, the air-raid shelter ventilation fan, and the ventilation check valve, and also open the main control gate valve.

[0012] As a further improvement of this utility model, the filtration unit includes a pre-filtration airtight valve, the input end of which is connected to the coarse filter, the output end of which is connected to the fine filter, the fine filter being connected to the post-filtration airtight valve, and the post-filtration airtight valve being connected to the main ventilation gate valve and the backup ventilation gate valve respectively.

[0013] When using this method for filtration and ventilation, close the clean airtight valve, open the pre-filtration airtight valve and the post-filtration airtight valve, then open any one of the dual-path ventilation units, and simultaneously open the main control gate valve. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] The components include: 1. Wave damper; 2. Coarse filter; 3. Clean airtight valve; 4. Main ventilation gate valve; 5. Main civil defense ventilation fan; 6. Main ventilation check valve; 7. Pre-filter airtight valve; 8. Fine filter; 9. Post-filter airtight valve; 10. Spare ventilation gate valve; 11. Spare civil defense ventilation fan; 12. Spare ventilation check valve; 13. Airtight door; 14. Normal air supply fan; 15. Normal airtight valve; 16. Main control gate valve; and 17. Air outlet. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings:

[0017] like Figure 1 The system shown is a ventilation and smoke exhaust system for an underground parking garage, including an air supply outlet 17. The air supply outlet 17 is connected to a normal air supply unit. The air supply outlet 17 is connected to a dual-path ventilation unit via a main control gate valve. The dual-path ventilation unit is connected to a cleaning unit and a filtration unit, respectively.

[0018] The normal air supply unit includes a sealed door 13, which is connected to a normal air supply fan 14. The normal air supply fan 14 is connected to a normal sealed valve 15, which is connected to an air outlet 17. The cleaning unit includes a wave damper 1, which is connected to a coarse filter 2. The coarse filter 2 is connected to a cleaning sealed valve 3 and a filtration unit. The cleaning sealed valve 3 is connected to a dual-path ventilation unit.

[0019] The dual-path ventilation unit includes a main ventilation gate valve 4 and a backup ventilation gate valve 10. Both the main ventilation gate valve 4 and the backup ventilation gate valve 10 are connected to the clean and airtight valve 3. The main ventilation gate valve 4 is connected to the main civil defense ventilation fan 5. The main civil defense ventilation fan 5 is connected to the main ventilation check valve 6. The main ventilation check valve 6 is connected to the main control gate valve. The backup ventilation gate valve 10 is connected to the backup civil defense ventilation fan 11. The backup civil defense ventilation fan 11 is connected to the backup ventilation check valve 12. The backup ventilation check valve 12 is connected to the main control gate valve.

[0020] The filtration unit includes a pre-filtration airtight valve 7, the input end of which is connected to the coarse filter 2, the output end of which is connected to the fine filter 8, the fine filter 8 is connected to the post-filtration airtight valve 9, and the post-filtration airtight valve 9 is connected to the main ventilation gate valve 4 and the backup ventilation gate valve 10, respectively.

[0021] In this invention, the air volume for civil defense cleaning ventilation and filtration ventilation is relatively small. To ensure the ventilation requirements for civil defense, the fans need to be manually and electrically driven. The normal air supply volume of the garage is larger than the smoke exhaust and civil defense ventilation volume. Therefore, determining the system pipe diameter and vent size based on the normal air supply volume and the specified duct and vent velocity will ensure the requirements for civil defense ventilation and fire smoke exhaust / makeup air. Meanwhile, the normal air supply fan 14 has a relatively large external size, and a large number of fans will occupy a significant amount of building space. When the ventilation room area is small, a single fan with dual-speed drive is more suitable, i.e., high-speed operation during normal operation and low-speed operation during smoke exhaust / makeup air.

[0022] In wartime, close the airtight door 13 and the normal airtight valve 15, open the main control gate valve, and stop the normal air supply fan 14. When filtered ventilation is required, close the clean airtight valve 3, open the pre-filter airtight valve 7 and the post-filter airtight valve 9, and start one of the main air-raid shelter ventilation fan 5 and the standby air-raid shelter ventilation fan 11; when clean ventilation is required, close the pre-filter airtight valve 7 and the post-filter airtight valve 9, open the clean airtight valve 3, and run both the main air-raid shelter ventilation fan 5 and the standby air-raid shelter ventilation fan 11 simultaneously.

[0023] Normally, the main control gate valve 16 is closed, the airtight door 13 and the normal airtight valve 15 are opened, and the ventilation fan runs at high speed. When a fire signal is received and smoke exhaust and air supply are required, the normal ventilation fan is switched to low speed to reduce the air supply volume.

[0024] This invention saves investment, reduces building space, facilitates maintenance and management, and ensures the safety and reliability of the system.

[0025] This utility model is not limited to the above embodiments. Based on the technical solutions disclosed herein, those skilled in the art can make some substitutions and modifications to some of the technical features without creative labor, and these substitutions and modifications are all within the protection scope of this utility model.

Claims

1. A ventilation and smoke extraction system for an underground parking garage, comprising air supply outlets, characterized in that: The air outlets are connected to the normal air supply unit, and the air outlets are connected to the dual-path ventilation unit via the main control gate valve. The dual-path ventilation unit is connected to the cleaning unit and the filtration unit respectively.

2. The ventilation and smoke extraction system for an underground parking garage according to claim 1, characterized in that: The normal air supply unit includes a sealed door, which is connected to the normal air supply fan. The normal air supply fan is connected to the normal sealed valve, and the normal sealed valve is connected to the air outlet.

3. A ventilation and smoke extraction system for an underground parking garage according to claim 2, characterized in that: The cleaning unit includes a wave damper, which is connected to a coarse filter. The coarse filter is connected to a cleaning and sealing valve and a filtration unit. The cleaning and sealing valve is connected to a dual-path ventilation unit.

4. A ventilation and smoke extraction system for an underground parking garage according to claim 3, characterized in that: The dual-path ventilation unit includes a main ventilation gate valve and a backup ventilation gate valve. Both the main ventilation gate valve and the backup ventilation gate valve are connected to a clean and airtight valve. The main ventilation gate valve is connected to the main civil defense ventilation fan, the main civil defense ventilation fan is connected to the main ventilation check valve, the main ventilation check valve is connected to the main control gate valve, the backup ventilation gate valve is connected to the backup civil defense ventilation fan, the backup civil defense ventilation fan is connected to the backup ventilation check valve, and the backup ventilation check valve is connected to the main control gate valve.

5. A ventilation and smoke extraction system for an underground parking garage according to claim 4, characterized in that: The filtration unit includes a pre-filtration airtight valve, the input end of which is connected to the coarse filter, the output end of which is connected to the fine filter, the fine filter is connected to the post-filtration airtight valve, and the post-filtration airtight valve is connected to the main ventilation gate valve and the backup ventilation gate valve, respectively.

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