Many users of tripod turnstiles often ask about their working principle. How do tripod turnstiles control the entry and exit of people? Let’s first explore the classification and core components of tripod turnstiles.
Classification of Tripod Turnstiles:
Based on the drive mechanism, tripod turnstiles are categorized into mechanical, semi-automatic, and fully automatic types:
1. Mechanical Type:
- Description: Operates without any electrical components, relying purely on mechanical principles.
- Advantages: High safety, long service life, easy maintenance, and reliable after-sales service.
- Disadvantages: Cannot connect to external devices, limited usage scenarios.
2. Semi-Automatic Type:
- Description: Includes some electrical control components and can connect to external devices.
- Advantages: Simple structure, easy maintenance, long service life, and fewer after-sales issues.
- Disadvantages: Requires manual intervention to lift the arm after powering on and manual pushing of the arm after card swiping.
3. Fully Automatic Type:
- Description: Differs from the semi-automatic type by automatically raising the arm after powering on. After card swiping, the arm opens automatically, allowing users to pass effortlessly.
- Advantages: User-friendly and efficient operation.
- Disadvantages: More complex structure, challenging after-sales service, and shorter lifespan.
Working Principle of the Fully Automatic Tripod Turnstile Mechanism:
1. Base Support:
- The base of the mechanism uses a 1.5mm square-tube triangular support structure to handle major forces, ensuring durability. Many competitors use simple iron sheets for fixation.
2. Core Components:
- Two square electromagnets (24V, 15W) for unlocking and locking:
- Normally unpowered.
- Upon receiving an unlocking signal, the lock engages at 24V and holds at 12V for passage.
- One round electromagnet (12V, 3W) for dropping the arm in case of power failure.
- Other components: A travel switch, hydraulic damper (to reduce noise and impact), a turntable, and the arms.
- Noise: Approximately 70 decibels (between 30–50 dB).
3. Electromagnet Operation:
- When the coil is powered with 24V, it generates a magnetic force to unlock the locking arm.
- When unpowered, the locking arm returns to its default position and locks the cam.
4. Adjustment for Normally Open State:
- Manual Adjustment: Adjust the screw at the tail of the electromagnet.
- Electrical Adjustment: Continuously supply power to the electromagnet.
5. Design:
- Simple, symmetrical, and intuitive structure for easy maintenance.
6. Counting Mechanism:
- A travel switch ensures accurate counting. When the arm rotates 30 degrees, it signals that one person has nearly completed passage. The switch closes, locking the turnstile to prevent tailgating.
7. Damper Adjustment:
- At a damper setting of "5", the arm achieves optimal reset speed and force. Larger values increase damping, slowing rotation.
8. Reliability:
- The mechanism can operate 3 million cycles without failure.
9. Passage Speed:
- Accommodates 30–40 people per minute.
Working Principle of the Turntable:
1. Components:
- Springs (manganese steel), three arms, three compression blocks (304 stainless steel), large and small pins (304 stainless steel), and the turntable (aluminum alloy).
- Turntable housing diameter: ￠180mm.
- Many competitors use cast iron for outdoor settings, which rusts easily, affecting quality and appearance.
2. Arm Drop Bracket:
- Used in enclosed indoor spaces with limited exit points. It is unnecessary for open outdoor environments with multiple exits.
- Working Principle:
- Maintains a 12V supply during normal use to prevent the arm from dropping.
- In the event of a power failure, the arm drops to provide an emergency passage.
Applications:
Tripod turnstiles, with their unique working principles and features, can be used in construction sites, factories, tourist attractions, libraries, and venues, among other places. For more information or inquiries about tripod turnstiles, feel free to contact us or purchase our products!
