ZOOMRY
The Belt Arrestor is a safety protection device designed specifically for belt conveyors, with mechanical braking as its core. It can be quickly triggered when the belt breaks or slips severely, locking the belt through a bidirectional clamping mechanism to prevent it from uncontrolled sliding or falling. Suitable for various bulk material conveying scenarios such as mines, ports, and power plants, it protects equipment, materials, and personnel safety, making it an indispensable safety redundancy device for belt conveyors.
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 (increasing response time to ≤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 of the belt (preventing material side fall) but also locks the return section (avoiding belt stacking and winding). The braking deceleration is controlled between 0.2-0.5m/s² to prevent inertial impact from damaging equipment.
3. Reset and Linkage: After troubleshooting, the brake blocks can be reset via manual unlocking or hydraulic release device. It also supports linkage with the conveyor's main control system—when triggered, it 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: It only takes 0.2-0.3 seconds from belt breakage to complete capture, much faster than human reaction (about 1.5 seconds). It can prevent the belt from sliding more than 1 meter (in large-incline scenarios) and reduce material spillage by over 80%.
2. Full-belt Capture Without Secondary Damage: The bidirectional symmetrical clamping design avoids belt tearing caused by unilateral force. The braking surface is made of polyurethane or rubber composite material, which not only ensures friction (anti-slip coefficient ≥0.8) but also does not damage the belt surface.
3. Multi-scenario Adaptation with No Complex Debugging: It covers various belt conveyors with bandwidth 650-2200mm, inclination angle -25°~+32° (suitable for both upward and downward conveying), and belt strength 800-4000N/mm. Installation does not require modifying the main structure of the conveyor, and the quick-install fixture design allows single-set deployment within 2 hours.
4. Global Compliance with Sufficient Safety Redundancy: It meets standards such as China's NB/T 11464-2023, EU's EN 12895, and North America's ASTM D3794. The braking force reserves 20%-30% redundancy (e.g., the rated braking force of heavy-load models is 800-1500kN), ensuring reliable braking even under extreme loads.
III. Applications of the Belt Arrestor
The Belt Arrestor is suitable for all bulk material conveying scenarios using belt conveyors, and the applicable materials include:
1. Energy-related: Coal, coke, biomass fuel (suitable for thermal power plants, underground/ground conveying in coal mines);
2. Ore-related: Iron ore, copper ore sand, limestone (suitable for underground inclined shafts in mines, belt conveyors in open-pit mines);
3. Building Materials-related: Sand and gravel aggregates, cement clinker, fly ash (suitable for long-distance belt conveyors in mixing stations and cement plants);
4. Grain-related: Soybeans, corn, wheat (suitable for enclosed belt conveyors in grain depots to prevent material contamination).
IV. Introduction to Application Scenarios
1. Mine Inclined Shaft Conveyors: When mine inclined shaft belt conveyors (with inclination angles often reaching 15°-30°) transport ore, belt breakage may cause tens of tons of materials to fall and equipment to be damaged. The Belt Arrestor can lock the belt instantly, avoiding chain accidents of "belt-material-equipment". It is especially suitable for underground coal mines (requiring explosion-proof certification) and high-dust environments in metal mines.
2. Port Ship-loading Belt Conveyors: When the telescopic belt conveyors (20-50 meters long) of port mobile ship-loaders transport coal and ore at high speed (4-6m/s), belt breakage may cause materials to fall into the cabin or dock, leading to safety accidents. The Belt Arrestor can achieve precise braking, and with the dust-proof design of port equipment, it is suitable for humid and salt-fog environments.
3. Coal Handling Systems in Thermal Power Plants: If the coal handling belt conveyors (mostly horizontal or small-incline) from the coal yard to the boiler in thermal power plants break, it will cause interruption of coal supply for power generation. The Belt Arrestor can lock the belt quickly, reducing downtime (traditional maintenance takes 4-6 hours, while equipping with the arrestor can shorten it to 1-2 hours) and ensuring continuous power generation.
4. Aggregate Conveying Lines in Building Materials Plants: The aggregate belt conveyors (transporting sand, gravel, and clinker) in cement plants and mixing stations often suffer local belt wear and breakage due to material impact. The full-belt capture design of the Belt Arrestor can adapt to scenarios of belt edge wear, avoiding overall uncontrolled caused by local damage.
V. How to Choose the Right Belt Arrestor?
1. Core Conveyor Parameters: Calculate the required braking force based on bandwidth (650-2200mm), inclination angle (-25°~+32°), and belt strength (800-4000N/mm) (reference formula: Braking force = 1.3 × total gravity component of materials + belt along the inclination angle). Choose 50-200kN for light loads and 800-1500kN for heavy loads.
2. Environment and Working Conditions: For extreme low-temperature (-40℃) scenarios, select mechanical triggering (hydraulic oil is prone to solidification); for high-dust/humid environments, choose IP67 protection level and anti-corrosion coating (such as port salt-fog environments); for explosion-proof scenarios (coal mines, chemical industry), select models with ATEX or MA certification.
3. Installation and Maintenance: For space-constrained scenarios (such as corridors), choose a compact hanging frame; for production lines requiring frequent maintenance (such as cement plants), select quick-release brake blocks (replacement time ≤30 minutes); for remote unattended scenarios (such as underground mines), choose models with intelligent diagnosis functions (capable of monitoring brake block wear and abnormal tension).
4. Compliance and Adaptability: For export to European and American markets, confirm CE and ASTM certifications; when matching with existing conveyors, prioritize choosing the same brand as idlers and rollers (such as ZOOMRY's own equipment) to reduce dimensional adaptation errors.
