ZOOMRY

Belt Arrestor – Mechanical Braking & Full-Belt Bidirectional Capture for Conveyor Safety

I. How Does the Belt Arrestor Work?

1. Trigger Mechanism: The device is equipped with a built-in gravity sensing or tension monitoring device (optional for different models). When the belt breaks (sudden tension drop) or slips at an excessive speed (abnormal speed), the trigger mechanism unlocks instantly—light-load models adopt pure mechanical gravity drive (no external power, reliable in extreme environments), while heavy-load models are supplemented with hydraulic assistance (achieving response time ≤0.3 seconds).
2. Capture and Braking: After triggering, symmetrically arranged wedge-shaped brake blocks or arc-shaped clamping plates tighten synchronously from both sides of the belt to achieve "full-belt bidirectional capture"—it not only clamps the carrying section (preventing material side fall) but also locks the return section (avoiding belt stacking and winding). Braking deceleration is controlled between 0.2-0.5m/s² to prevent inertial impact damage.
3. Reset and Linkage: After troubleshooting, the brake blocks can be reset via manual unlocking or a hydraulic release device. It also supports linkage with the conveyor's main control system—triggering synchronously cuts off the conveyor's power supply and issues an acousto-optic alarm (some models can remotely send fault signals).

II. Advantages of the Belt Arrestor

1. Millisecond-level Response to Interrupt Risk Chain: Only 0.2-0.3 seconds from belt breakage to complete capture – much faster than human reaction (≈1.5s). Prevents belt from sliding more than 1 meter (in steep inclines) and reduces material spillage by over 80%.
2. Full-belt Capture Without Secondary Damage: Bidirectional symmetrical clamping avoids belt tearing from unilateral force. Braking surface is made of polyurethane or rubber composite (anti‑slip coefficient ≥0.8), ensuring friction without damaging the belt surface.
3. Multi‑scenario Adaptation with No Complex Debugging: Covers belt widths 650‑2200mm, inclination angles -25°~+32° (upward/downward), belt strength 800‑4000N/mm. Quick‑install fixture allows single‑set deployment within 2 hours without modifying existing conveyor structure.
4. Global Compliance with Sufficient Safety Redundancy: Meets standards NB/T 11464‑2023, EN 12895, ASTM D3794. Braking force reserves 20‑30% redundancy (e.g., heavy‑load models rated 800‑1500kN), ensuring reliable braking under extreme loads.

III. Applications of the Belt Arrestor

The Belt Arrestor is suitable for all bulk material conveying scenarios using belt conveyors, with applicable materials including:

• Energy‑related: Coal, coke, biomass fuel (thermal power plants, underground/overland coal mine conveyors).
• Ore‑related: Iron ore, copper ore sand, limestone (underground inclined shafts, open‑pit mine belt conveyors).
• Building materials‑related: Sand & gravel aggregates, cement clinker, fly ash (long‑distance conveyors in mixing stations and cement plants).
• Grain‑related: Soybeans, corn, wheat (enclosed belt conveyors in grain depots to prevent material contamination).

IV. Introduction to Application Scenarios

1. Mine Inclined Shaft Conveyors: With inclination angles often 15°‑30°, belt breakage could cause tens of tons of material to fall. The Belt Arrestor locks the belt instantly, preventing cascading failures of belt, material, and equipment. Ideal for explosion‑proof underground coal mines (certified) and high‑dust metal mines.
2. Port Ship‑loading Belt Conveyors: Telescopic conveyors (20‑50 m long) on mobile ship‑loaders run at high speed (4‑6 m/s). Belt breakage can spill material into the cabin or onto the dock. This arrestor provides precise braking and, with dust‑proof design, suits humid and salt‑fog environments.
3. Coal Handling Systems in Thermal Power Plants: If the coal yard‑to‑boiler belt breaks, it interrupts power generation. The Belt Arrestor locks quickly, reducing downtime (traditional maintenance 4‑6 h → with arrestor 1‑2 h) and ensures continuous power supply.
4. Aggregate Conveying Lines in Building Materials Plants: Cement plants and mixing stations often suffer local belt wear from impact. The full‑belt capture design adapts to edge wear scenarios, preventing total runaway from localized damage.

V. How to Choose the Right Belt Arrestor?

1. Core Conveyor Parameters: Calculate required braking force based on belt width (650‑2200 mm), inclination (-25°~+32°), and belt strength (800‑4000 N/mm). Reference formula: Braking force = 1.3 × total gravity component of materials + belt along inclination. Choose 50‑200 kN for light loads, 800‑1500 kN for heavy loads.
2. Environment and Working Conditions: For extreme low‑temperature (-40 ℃) environments, select mechanical triggering (hydraulic oil may solidify). For high‑dust/humid environments (e.g., port salt‑fog), choose IP67 protection and anti‑corrosion coating. For explosion‑proof scenarios (coal mines, chemical plants), select ATEX or MA certified models.
3. Installation and Maintenance: For space‑constrained locations (corridors), choose a compact hanging frame. For frequently maintained lines (cement plants), select quick‑release brake blocks (replacement ≤30 minutes). For remote unattended sites (underground mines), opt for intelligent diagnosis models that monitor brake block wear and abnormal tension.
4. Compliance and Adaptability: For export to European/American markets, confirm CE and ASTM certifications. When matching with existing conveyors, prioritize using the same brand as idlers and rollers (such as ZOOMRY's own belt conveyors) to minimize dimensional adaptation errors.

Need a reliable belt arrestor for your conveyor system? Contact ZOOMRY experts today for a tailored solution and free quote.