Steel Structure H Beam Shot Blasting Machine
1. Brief Profile
The Steel Structure H Beam Shot Blasting Machine is a specialized industrial system designed for surface preparation of H-shaped steel beams, I-beams, and other structural profiles. Utilizing high-velocity abrasive particles propelled by centrifugal blast wheels, this machine removes rust, mill scale, and welding residues while creating a uniform surface profile (Ra 40–80 μm) for optimal paint adhesion.
Engineered for heavy-duty applications, the machine accommodates H beams with heights up to 1,500 mm, widths up to 800 mm, and lengths exceeding 12 meters. Its continuous roller conveyor system ensures steady movement through the blasting chamber, while adjustable blast wheels target all critical surfaces—flanges, webs, and edges—for comprehensive cleaning.
Certified to international standards (CE, ISO9001), the machine integrates energy-efficient components, automated abrasive recycling, and advanced dust collection to minimize operational costs and environmental impact. Ideal for steel fabrication, bridge construction, and offshore projects, it enhances structural integrity by preventing corrosion and improving coating durability.
2. Application
The H Beam Shot Blasting Machine is indispensable in industries requiring high-quality surface preparation for structural steel components. Key applications include:
Steel Fabrication and Construction:
Pretreatment of H beams, I-beams, and columns used in building frameworks, stadiums, and industrial facilities.
Removal of mill scale and welding slag to achieve ISO 8501-1 Sa2.5–3 cleaning standards for anti-corrosion coatings.
Bridge and Infrastructure Projects:
Surface preparation of girders, trusses, and piers for bridges, viaducts, and highways.
Cleaning of welded joints and cut edges to ensure structural adhesion and fatigue resistance.
Offshore and Marine Engineering:
Pretreatment of H beams for offshore platforms, jack-up rigs, and ship hulls to withstand harsh marine environments.
Removal of salt deposits and oxide layers for cathodic protection compatibility.
Energy Sector:
Cleaning of steel towers for wind turbines, transmission lines, and solar panel support structures.
Surface profiling of pipeline supports and storage tank frames for corrosion resistance.
Railway and Transportation:
Pretreatment of railway tracks, crane girders, and wagon frames to reduce wear and extend service life.
Edge rounding of laser-cut or stamped H beams to minimize stress concentrations.
Heavy Machinery Manufacturing:
Surface preparation of crane booms, excavator arms, and mining equipment frames.
Cleaning of welded assemblies for hydraulic systems and conveyor structures.
3. Features
The machine incorporates advanced features to optimize performance, efficiency, and safety:
Heavy-Duty Roller Conveyor System:
Double-chain-driven rollers with hardened surfaces to support H beams weighing up to 5 tons per meter.
Adjustable roller spacing (200–1,500 mm) to accommodate varying beam dimensions.
Variable speed control (0.5–3 m/min) for precise process timing.
Multi-Wheel Blasting Technology:
Twin or quad centrifugal turbines (Ø500–800 mm) with direct-drive motors for abrasive velocities up to 90 m/s.
Adjustable throw angles (30°–90°) to target flanges, webs, and edges uniformly.
Curved vanes and alloy-lined housings to extend blade life (1,200–2,000 hours).
Automated Abrasive Recycling:
Screw conveyors and bucket elevators transport used abrasives to a multi-stage separator.
Air-wash technology removes dust and broken shots, ensuring consistent abrasive quality.
Automatic abrasive replenishment to maintain blasting intensity.
High-Efficiency Dust Collection:
Pulse-jet bag-type dust collectors with >99.5% efficiency, compliant with EPA and ATEX standards.
Optional cartridge filters for fine particle capture (≥1 μm).
Explosion-proof design for safety in flammable environments.
Modular Blasting Chamber:
Enclosed steel structure lined with Mn13 wear plates or rubber curtains to reduce wear and noise.
Segmented construction for easy maintenance and expansion.
Soundproofing panels to limit noise emissions (<85 dB).
Advanced Control System:
PLC-based interface with touchscreen HMI for real-time monitoring of blast parameters.
Automatic fault diagnosis and alarms for uninterrupted operation.
Data logging for quality control and process optimization.
Safety Enhancements:
Emergency stop buttons, interlock systems, and safety light curtains.
Rubber seals at entry/exit points to contain abrasives.
Fire suppression systems for high-risk applications.
Energy Efficiency:
Variable frequency drives (VFDs) to reduce power consumption during low-load operation.
Heat recovery systems for preheating abrasives or drying coated beams.
4. Main Parts
The machine consists of the following core components:
Blast Chamber:
Enclosed steel structure housing 4–8 blast wheels for uniform coverage of H beam surfaces.
Lined with Mn13 wear plates or rubber sheets to protect against abrasive impact.
Roller Conveyor System:
Heavy-duty rollers (Ø250–400 mm) with hardened surfaces for durability.
Double-chain drive mechanism with gear motors for smooth beam movement.
Support frames with adjustable height for different beam profiles.
Blast Wheel Assembly:
High-speed turbines (2,900–3,200 RPM) with curved vanes for optimal abrasive projection.
Direct-drive motors (15–30 kW per wheel) for consistent performance.
Adjustable control cages to regulate abrasive flow and direction.
Abrasive Recycling System:
Horizontal screw conveyors to collect used abrasives from the chamber floor.
Bucket elevator with chain-driven buckets for vertical transport.
Air-wash separator with adjustable airflow to remove dust and fines.
Dust Collection Unit:
Pulse-jet bags or cartridge filters to capture fine particles.
Compressed air system for automatic bag cleaning.
Dust discharge chute for safe disposal.
Control Panel:
PLC-controlled operation with real-time monitoring of conveyor speed, blast intensity, and dust levels.
Touchscreen HMI for parameter adjustment and fault diagnostics.
Remote access capability for technical support.
Safety Accessories:
Rubber curtains and observation windows for operator visibility.
Soundproofing panels and vibration dampers to reduce noise.
Fire extinguishers and explosion-proof ventilation.
5. Basic Parameters
Parameter Specification
Model Range HB-600, HB-800, HB-1000, HB-1200
Workpiece Dimensions Height: 200–1,500 mm; Width: 100–800 mm; Length: ≤12 m
Conveyor Speed 0.5–3 m/min (adjustable)
Blast Wheel Power 4 × 15 kW to 6 × 22 kW (depending on model)
Abrasive Type Steel shots (S230–S550), stainless steel, or ceramic
Abrasive Capacity 2,000–6,000 kg
Dust Collector Capacity 20,000–50,000 m³/h (pulse-jet)
Noise Level ≤82 dB(A)
Power Supply 380V, 50Hz, 3-Phase
Total Weight 8,000–25,000 kg (depending on configuration)
Certifications CE, ISO9001, ISO14001, ATEX (for explosive environments)
Cleaning Efficiency ≥98% removal of mill scale (ISO 8501-1 Sa2.5–3)
Surface Profile Ra 40–80 μm (adjustable via abrasive size and speed)
Throughput Capacity 200–800 m²/hour (depending on beam thickness)
Maintenance Interval Blast wheel blades: 1,000–1,800 hours; Filters: 6 months
Selection Criteria
When choosing an H Beam Shot Blasting Machine, consider the following factors:
Workpiece Specifications:
Ensure the machine can handle the maximum height, width, and length of your H beams.
Verify compatibility with your production line speed (e.g., 1.5 m/min for bridge girders vs. 2.5 m/min for industrial frames).
Throughput Requirements:
Calculate daily or hourly processing needs (e.g., 500 m²/hour for large-scale construction projects).
Select a model with sufficient blast wheel power and conveyor capacity.
Surface Finish Standards:
Match the machine’s surface profile (Ra) and cleaning grade (ISO 8501-1) to your coating requirements.
Adjustable abrasive size and speed allow flexibility for different finishes.
Energy Efficiency:
Opt for machines with VFDs and heat recovery systems to reduce operational costs.
Compare power consumption per square meter of processed steel.
Maintenance and Durability:
Prioritize machines with wear-resistant components (Mn13 liners, alloy blades) for longevity.
Check ease of access for maintenance tasks like blade replacement and filter cleaning.
Safety and Compliance:
Ensure the machine meets local safety regulations (e.g., ATEX for explosive environments).
Verify noise levels and dust emission compliance.
Budget and ROI:
Balance upfront costs with long-term savings from reduced downtime and lower abrasive consumption.
Consider financing options or leasing for high-capacity models.
Conclusion
The Steel Structure H Beam Shot Blasting Machine is a versatile and efficient solution for industries requiring high-quality surface preparation of structural profiles. Its robust design, multi-wheel blasting technology, and modular construction make it ideal for steel fabrication, bridge construction, and offshore projects. By ensuring uniform cleaning, profiling, and edge rounding, the machine enhances coating adhesion, extends component lifespan, and reduces maintenance costs.
When selecting a machine, prioritize workpiece compatibility, throughput, energy efficiency, and safety compliance. Investing in a high-capacity model with durable components and low operational costs will deliver long-term value and reliability.
