How do turnstiles meet the fire safety requirements of buildings?

一,Standard specifications for rotary turnstiles in construction fire safety
1. Legal Foundation and Main Provisions
According the General Code for Building Fire Protection GB 55037-2022,:
Article 7.1.5 permits the installation of gates with fire linking purposes even if no items influencing evacuation should be placed along evacuation routes, hallways, and exits.
Article 7.1.7 underlines that staff can open evacuation exit doors from the inside without using tools; they should be able to automatically release in the case of a fire.
Extra requirements of GB/T 40248-2021 "Fire Safety Management in Personnel Intensive Areas":
Article 8.1.9 states that "emerging exit" signs should be placed and evacuation doors fitted with access control systems should guarantee that they may be pushed open from the inside in need of a fire.
Suggest combining the automatic fire alarm system with an electromagnetic door lock mechanism.
2. Rotation turnstile fire safety's pain points
Limitations on physical structure:
Usually having a channel width of 570–800mm, traditional turnstiles could generate congestion during a fire.
The full height rotary gate stands 2.2 meters high. Should no emergency release system be put in place, it will impede evacuation.
Seventy percent of the current turnstiles remain locked even after a power outage as they are not connected to the fire alarm system.
Absence of manual release signals causes uncertainty among the evacuated people during operation.
Not enough identification mechanism
Only 35% of turnstiles have fluorescent evacuation signs, which would not provide enough nighttime or smoky environment visibility.
二, Implementation of fire safety technology for rotary turnstiles
1. Mechanical structure optimization
Mechanism of fire discharge:
Adopting dual mechanisms of electromagnetic lock and mechanical release, the electromagnetic lock will be shut off and released inside 0.3 seconds in event of a fire.
Equipped with a manual knob, it may be manually unlocked in three seconds without requiring tools in an emergency.
Designed as a freely rotable structure, the central rotating arm's channel width automatically increases to 1200mm following power outage.
Design with anti-collision buffers:
Using gas spring damping technique, the revolving arm lowers the collision impact force to less than 50N.
Installed on both sides of the channel, anti-collision strips satisfy EN 13501-1 B1 flame retardant criteria.
2. intelligent control mechanism
Module for fire linkage:
Integrated fire alarm interface supporting dry contact signal input
Connected with the automatic fire alarm system, the gate will be triggered one second following the confirmed fire.
Support remote monitoring; the management system allows one to examine the gate status.
System of backup electricity:
Having UPS uninterruptible power supply, it can run four hours continuously following a power failure.
Real-time battery status monitoring causes automatically to switch to emergency mode when low battery level develops.
3. Emergency signs and lighting
System for indicating evacuation:
Arrange double-sided LED evacuation indicator lights with a continuous operating period of at least 90 minutes and a brightness of ≥ 500cd/m ².
Equipped with emergency lighting with an illumination of ≥ 5lx, satisfying the GB 17945-2010 standard
Design specifications for identification:
Made of bright material spanning at least 200mm x 200mm, the "emergency exit" sign
Install tactile identifying tape so visually challenged people may identify
Motorized Flap Barrier Turnstile