Double-Sided Belt Plow Discharger in Bulk Conveying: Electro-Hydraulic Drive Mechanism, Dual-Plow Structure, and Impact Bed Elevation Standards

In thermal power coal handling, metallurgical batching, mining processing, and port bulk transfer systems, intermediate multi-point diverting and discharging on conveyor belts are essential for silo group filling. Compared to heavy tripper cars that occupy extensive head space, the double-sided belt plow discharger offers a compact, thorough diverting solution with reliable automatic control.

Based on engineering practice and technical specifications, this article systematically examines the electro-hydraulic drive mechanism, dual-scraper material ratio, linkage impact bed structure, and explosion-proof safety requirements for double-sided plow dischargers.

【IMPORTANT SAFETY WARNING】: This standard double-sided belt plow discharger is a non-explosion-proof product. It is strictly prohibited from direct use in hazardous environments containing explosive dust or gas. If explosion-proof certification is required on-site, custom Ex-rated electro-hydraulic actuators and control boxes must be specified.

I. Operating Principle and Action Cycle

The double-sided belt plow discharger utilizes a self-pressure-holding electro-hydraulic push rod as its power source, achieving efficient switching between "unloading mode" and "bypass transit mode" through a linkage mechanism:

1. Unloading Mode: Upon receiving an extension signal, the electro-hydraulic actuator lowers the main and secondary plow heads simultaneously. Concurrently, the linkage mechanism elevates the underlying impact bed to the operating height (e.g., 270mm for a 650mm belt width). The troughed conveyor belt is flattened into a smooth surface. The main and secondary blades press firmly against the belt, scraping material evenly into chuting hoppers on both sides.
2. Standby Mode: When unloading is complete, the push rod retracts, lifting the plow heads to the upper limit standby position. Simultaneously, the impact bed lowers, and the belt returns to its standard troughed profile via variable idlers, allowing unhindered material passage.

XLXLQ-SLSBelt Plow DischargerPowered by an electro-hydraulic actuator, our belt plow discharger lowers the dual main and auxiliary plow heads during operation while the hinge mechanism elevates the impact bed into discharging position, flattening the belt surface. The plow blades fit tightly against the belt to discharge materials into the hopper. Upon completion, the actuator retracts, raising the plow heads to top dead center standby position and lowering the impact bed. The belt returns to conveying status as the variable idlers switch from flat to troughed, allowing material to pass smoothly.View Product Details →

II. Structural Features and Technical Advantages

1. Dual-Blade Heterogeneous Combination

• Main Plow Blade: Constructed from high-hardness wear-resistant alloy steel plate, directly taking the impact of high-speed bulk streams and absorbing primary shear forces to extend service life.
• Secondary Plow Blade: Made of high-elasticity polyurethane, providing soft, wear-resistant, and flexible contact against belt surface contours for thorough scraping without scratching the belt cover.

2. Linkage Impact Bed Structure

Replacing traditional wheel-supported setups, the bottom utilizes a flat impact bed. Covered with ultra-high-molecular low-friction material, the bed provides continuous, flat support under high scraping pressure, closing gaps caused by belt sag and preventing material leakage.

3. Actuator with Double Lower-Limit Protection

Powered by an integrated electro-hydraulic push rod (DYTZ 750-200/50, 750kg thrust, 1.1kW), featuring internal pressure holding to stay in position without mechanical locks. The frame incorporates double lower-limit protection to prevent over-travel from damaging the belt.

III. Comparative Evaluation of Conveyor Discharging Equipment

IV. Technical Parameters Matrix

• Applicable Belt Width: 650mm (Customizable from 800mm to 2000mm)
• Rated Discharging Material Speed: ≤ 2.0 m/s
• Actuator Model & Thrust: DYTZ 750-200/50, Thrust 750 kgf, Stroke 200 mm, Speed 50 mm/s
• Power Supply & Protection: AC380V 3-Phase 4-Wire, Total Power 1.1 kW, Protection Class IP54
• Environmental Conditions: Ambient Temp -40℃ to 50℃, Humidity 0% to 95% RH, Pressure 80 kPa to 110 kPa

V. Field Installation, Adjustment & Safety Standards

1. Installation Height & Clearance Adjustment:
   • Extend the push rod to max stroke, then retract 10mm - 20mm as a safety cushion.
   • Raise the impact bed to the specified working height (270mm recommended for 650mm belt).
   • Adjust plow bolts so the polyurethane secondary blade fits snugly against the belt while the alloy main blade maintains a 5mm – 10mm clearance gap.
2. Testing and Commissioning:
   • Perform no-load dry runs first to verify that limit switches automatically cut power at upper and lower extreme positions.
   • Conduct load testing incrementally at 20% → 50% → 80% → 100% of rated capacity.
3. Safety Maintenance Rules:
   • Lockout/Tagout power before maintenance, blade replacement, or cleaning.
   • Manual oiling, welding, or component disassembly is strictly prohibited while the belt conveyor is in operation.

Conclusion

The double-sided belt plow discharger integrates an electro-hydraulic actuator, dual-material blades, and a linkage impact bed to eliminate spillage and belt damage. Following proper installation tolerances and non-explosion-proof safety guidelines ensures long-term, efficient operation in bulk handling systems.