Pipe Inner Wall Shot Blasting Machine is specialized equipment used to clean, prepare, or treat the inner surface of pipes or tubes. The machine uses high-velocity abrasive materials (like steel shots or grit) propelled by centrifugal force or compressed air to remove contaminants, rust, scale, or old coatings from the inner walls of pipes.
How Does Pipe Inner Wall Shot Blasting Machine Works
- Pipe Placement:
The pipe or tube is positioned in the machine, usually held stationary or rotated during the blasting process to ensure even coverage.
- Shot Blasting Nozzle :
A special blasting head or nozzle is inserted into the pipe’s interior. This nozzle is designed to direct abrasive media at high speed onto the inner wall of the pipe.
- Abrasive Propulsion:
The abrasive media (e.g., steel shots, grit, or sand) is propelled using either:
Centrifugal force: From rotating turbines.
Compressed air: From an air-powered blasting system.
- Rotational or Linear Movement:
The blasting nozzle moves linearly through the pipe’s length or rotates as it moves to ensure all areas of the inner surface are evenly treated.
- Surface Cleaning:
The abrasive impact removes impurities such as rust, mill scale, old coatings, and dirt.
The process creates a clean and roughened surface, ideal for subsequent coating or painting.
- Abrasive Recovery:
After blasting, the abrasive media and debris are collected, separated, and cleaned for reuse in a recycling system within the machine.
Working principle of the steel pipe inner wall shot blasting machine
Use compressed air to spray steel shots on the steel pipe inner wall to cause plastic deformation of the metal surface and form a strengthened layer. Significantly improve the fatigue strength of bending and stress corrosion. The surface effect of shot-blasted steel pipes is better than that of smooth-surfaced metal pipes.
Blasting Chamber
The shot blast machine chamber is divided into a mobile shot blasting chamber and a fixed shot blasting chamber.
The sealed chamber is welded with profiled steel frame and steel plate to ensure sufficient rigidity and strength.
In order to ensure the wear-resistant life of the shot blasting chamber, the shot blasting chamber is lined with SP Mn13 rolled high manganese steel liner, and the average life of the liner is> 25000 hours.
The movable sealed chamber is driven by a shaft-mounted reducer, and the speed is frequency-converted to adjust the speed. It can walk back and forth, and can seal the ends of the steel pipe.
Quick-change polyurethane sealing plates are installed at the mouth of the shot blasting chamber to seal both ends of the steel pipe to prevent abrasive splashing.
The fixed shot blasting chamber is equipped with a steel pipe positioning and dust removal system to recover and purify the dust after shot blasting.
Shot blasting Movable Trolley
The hydraulic inner wall shot blasting device, belt feeding device, shot blasting device support roller, and hydraulic pump station are all installed on the mobile trolley, and the traveling speed of the mobile trolley adopts frequency conversion speed regulation.
The shot blasting device is driven by a high-pressure closed-circuit hydraulic shot blasting system and consists of a hydraulic pump station and a hydraulic motor.
The hydraulic pump station is installed on the shot blasting mobile trolley, connected to the hydraulic motor through the high-pressure oil pipe, and the hydraulic motor drives the shot blasting device for shot blasting cleaning. The hydraulic plunger electromagnetic proportional high-pressure pump adopts the product of Germany imported REXROTH company. The motor of the pump station is 110kw, and the working pressure of the system is 21.0Mpa.
Pipe Inner Wall Shot Blasting Machine Application
Oil and Gas Pipelines: Cleaning pipe interiors to prevent corrosion or prepare for lining.
Hydraulic and Pneumatic Tubes: Ensuring clean surfaces for efficient fluid flow.
Water and Sewage Pipes: Removing contaminants before re-lining or coating.
Manufacturing Industry: Surface preparation for pipes used in various industrial applications.
Pipe Inner Wall Shot Blasting Machine Advantages
- Efficient cleaning of pipe interiors, even in long or narrow pipes.
- Prepares the surface for improved adhesion of protective coatings.
- Extends the life of pipes by preventing corrosion and improving flow efficiency.
- Automates cleaning, reducing manual labor and time.
Conclusion
Pipe inner wall shot blasting machine is a special equipment for cleaning the inner wall of pipe designed to meet the specific technological requirements of users. Through shot blasting cleaning, it can remove the dirt, oxide scale, welding slag, waste paint on the surface of the complex workpiece, so that the surface of the workpiece is smooth and clean. At the same time, this pipe blasting equipment can improve the surface fracture resistance, reduce the internal stress of the workpiece, so that the surface of the workpiece is strengthened, so as to achieve the purpose of improving the surface and internal quality of the workpiece.