HLT Series Self-Propelled Mobile Shot Blasting Cleaning Machine (Dual-Purpose for Road Surface & Steel Structure)

The HLT series mobile shot blasting machine is a self-propelled surface treatment unit that utilizes mechanical shot blasting principles to efficiently clean large horizontal surfaces. Its core operating principle involves using a blast wheel to propel high-speed rotating abrasive media (shot) via centrifugal force; this creates a dense, fan-shaped stream of shot that strikes the work surface at high velocity and a specific angle. The impact removes surface laitance, impurities, rust, old coatings, and contaminants, while simultaneously imparting a uniform surface roughness. Concurrently, the integrated dust collector generates strong negative pressure to recover the shot and the dislodged debris and dust; following an airflow separation process, intact shot is automatically recirculated for reuse, while impurities and dust are deposited into the collection bin. The cleaning process is dust-free and pollution-free, with automatic shot recycling. The mechanical system comprises several straightforward components, including the blasting assembly, shot recovery chamber, separation unit, and drive mechanism. Capable of forward and backward movement as well as turning, the HLT mobile shot blasting machine supports continuous operation, enabling a flexible workflow where cleaning can commence or cease at any time.

Regarding manufacturing and structural quality, the main body of the HLT series machine is constructed from high-wear-resistance Mn13 and 65# manganese steel plates. Precision laser cutting and CNC bending processes are employed to enhance machine accuracy and extend service life. Critical components within the blast chamber are precision-cast from wear-resistant materials to ensure durability. Wear parts—such as the blast wheel and directional sleeve—are also precision-cast from wear-resistant materials for longevity. The internal liner plates consist of thickened manganese alloy steel (8–12 mm) for robust durability. A modern air-separation system is used to ensure the complete recovery and separation of steel shot. The PLC control system, combined with variable-frequency drive (VFD) technology, allows for the adjustment of travel speed and shot flow rate to achieve optimal cleaning results. The machine features a high-efficiency dust collector with a separate dust bin design, facilitating easy disposal of collected dust. The entire unit utilizes a modular, sectional structure, with wear-resistant inserts placed between main modules to extend operational life. The HLT mobile shot blasting machine offers outstanding performance advantages and significant application value. First, it is highly mobile and easy to operate: the unit is self-propelled, requires minimal setup, and allows for immediate cleaning and rapid relocation; it can move forward, backward, and turn, ensuring uniform cleaning quality across any section of a large flat surface. Second, it is dust-free and eco-friendly: equipped with a dust collector, it ensures dust-free, pollution-free operation; a closed-loop steel shot circulation system further guarantees dust-free performance, with the shot media automatically recycled. Third, it delivers superior cleaning quality: treated surfaces are neat and aesthetically pleasing; steel plate rust removal meets Sa2.5–3 standards, while concrete surfaces acquire a uniform, rough “orange-peel” texture. Fourth, it supports all-weather operation: performance is unaffected by weather conditions, including during winter construction. Fifth, it offers high productivity: cleaning speed and depth can be adjusted based on specific conditions, allowing for optimal results through parameter optimization.

In terms of applications, the HLT mobile shot blasting machine is widely used in the following areas: Cement/Concrete Surfaces—surface treatment for factory floors, warehouses, and parking lots (removing old markings, coatings, paint, waterproofing/anti-corrosion materials, contaminants, and impurities); renovation of old floors and preparation for new floor coatings; and roughening concrete bridge decks for waterproofing. Asphalt Concrete Surfaces—routine preventive maintenance for highways, bridges, and asphalt roads (removing impurities and markings, restoring friction coefficients, increasing surface roughness, and cleaning up flushed/bleeding asphalt). Steel Surfaces—rust removal on bridge deck steel plates; surface pre-treatment to enhance adhesion before applying waterproofing/anti-corrosion materials or secondary concrete pours; shot blasting for ship decks and oil rig platforms; and cleaning the interior and exterior walls of gas tanks, oil storage tanks, and water reservoirs. Airport Runways—removing tire marks (rubber deposits) and markings from concrete or asphalt runways, and restoring or increasing surface roughness.