中文版
The steel pipe inner wall shot peening machine employs shot peening technology, using compressed air as the power source to clean and strengthen the inner walls of steel pipes. Abrasive materials are accelerated to generate kinetic energy, which is then targeted to impact the inner walls. When the pipe is positioned within the spray gun chamber, the gun automatically extends into the pipe and moves vertically inside the chamber, achieving comprehensive peening treatment of the inner walls. The inner wall peening equipment is primarily designed to clean the inner surfaces of small-bore metal pipes, representing an upgraded iteration of compressed-air-fed shot blasting systems.
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disa@disachina.com
The shot peening machine for internal steel pipe operates in synchronous working cycles within the complete production process. The components are transported by our roller conveyor, and they all have the same size and diameter. This machine consists of six main stations, and the steel pipes will pass through each station in turn to conduct sandblasting operations internally.
Each station can be independently controlled, and all working parameters will be set according to the size specifications of the steel pipes and stored in the Programmable Logic Controller (PLC) unit. The machine is equipped with a panel management system. The visual design on the large touch screen and the convenient and easy-to-use menu enable the operators to use, control and maintain the machine with ease. In this system, all power parameters can be set and tracked throughout the process, ensuring that the working process is stable and controllable.
The precise clamping system can ensure that the steel pipes are in a controlled position and can also achieve a controllable rotational speed when the components are undergoing sandblasting operations. The specially designed sandblasting nozzles are fixed on the vertical operating device. After the sandblasting process is completed, the machine will automatically turn off the plastic medium and blow out the remaining medium from the boiler using the same device. This unique design enables us to pretreat the workpiece at only one station.
The steel pipe inner wall shot peening machine serves as a critical pre-coating equipment for pipelines, enabling surface treatment of inner walls to meet Sa2.5 to Sa3 standards, thereby significantly extending the pipeline’s service life.
1. Production Line and Core Components
The core structure of the main unit includes: • Pneumatically operated front/rear sealing chambers • Spray gun assembly with guidance mechanism • Gun support frame • Variable frequency drive system • Pipe rotation system • Pipe clamping mechanism • Automated loading/unloading system • Pneumatic abrasive recovery system • Sand hopper • Blasting chamber • Air separator • Dust removal system • Compressed air system • Electrical control system
2. Workflow
The machine enables automated pipe handling and inner wall peening:
Loading phase: • The tilting sealing chamber is opened. • The automatic feeding mechanism positions the pipe on the work platform.
Processing phase: • The clamping device secures the pipe. • The sealing chamber tilts into position. • The pipe rotates while the spray gun moves vertically within it, ensuring uniform peening treatment.
Abrasive recovery phase: • A high-capacity dust removal system ensures pneumatic recovery of abrasives and dust elimination.
Unloading phase: • The abrasive feed valve and peening valve are closed. • The peened pipe is extracted via the mobile sealing chamber. • The trolley’s automated system discharges the pipe onto the platform, completing a full work cycle.
3. Technical Advantages
Superior cleaning performance: Removes oxides and post-stretching residues from small-bore pipe inner walls, achieving a surface cleanliness level of Sa2.0 to Sa2.5.
Stress optimization: Eliminates residual stresses from manufacturing processes (e.g., forging, stretching, rolling), enhancing fatigue resistance and stress corrosion cracking resistance.
Corrosion protection: Improves inner wall quality and coating adhesion, ensuring long-term corrosion resistance and extending impact/vibration resistance.
Full automation: Supports automated modes including: • Material feeding and alignment • Clamping and positioning • 90° tilting • Gun insertion into the pipe • Synchronized pipe rotation and vertical gun movement
4. Unique capabilities: As the only shot peening equipment capable of treating small-bore pipe inner walls, it integrates an advanced abrasive recovery system and industrial-grade dust control units.
Each station can be independently controlled, and all working parameters will be set according to the size specifications of the steel pipes and stored in the Programmable Logic Controller (PLC) unit. The machine is equipped with a panel management system. The visual design on the large touch screen and the convenient and easy-to-use menu enable the operators to use, control and maintain the machine with ease. In this system, all power parameters can be set and tracked throughout the process, ensuring that the working process is stable and controllable.
The precise clamping system can ensure that the steel pipes are in a controlled position and can also achieve a controllable rotational speed when the components are undergoing sandblasting operations. The specially designed sandblasting nozzles are fixed on the vertical operating device. After the sandblasting process is completed, the machine will automatically turn off the plastic medium and blow out the remaining medium from the boiler using the same device. This unique design enables us to pretreat the workpiece at only one station.
The steel pipe inner wall shot peening machine serves as a critical pre-coating equipment for pipelines, enabling surface treatment of inner walls to meet Sa2.5 to Sa3 standards, thereby significantly extending the pipeline’s service life.
1. Production Line and Core Components
The core structure of the main unit includes: • Pneumatically operated front/rear sealing chambers • Spray gun assembly with guidance mechanism • Gun support frame • Variable frequency drive system • Pipe rotation system • Pipe clamping mechanism • Automated loading/unloading system • Pneumatic abrasive recovery system • Sand hopper • Blasting chamber • Air separator • Dust removal system • Compressed air system • Electrical control system
2. Workflow
The machine enables automated pipe handling and inner wall peening:
Loading phase: • The tilting sealing chamber is opened. • The automatic feeding mechanism positions the pipe on the work platform.
Processing phase: • The clamping device secures the pipe. • The sealing chamber tilts into position. • The pipe rotates while the spray gun moves vertically within it, ensuring uniform peening treatment.
Abrasive recovery phase: • A high-capacity dust removal system ensures pneumatic recovery of abrasives and dust elimination.
Unloading phase: • The abrasive feed valve and peening valve are closed. • The peened pipe is extracted via the mobile sealing chamber. • The trolley’s automated system discharges the pipe onto the platform, completing a full work cycle.
3. Technical Advantages
Superior cleaning performance: Removes oxides and post-stretching residues from small-bore pipe inner walls, achieving a surface cleanliness level of Sa2.0 to Sa2.5.
Stress optimization: Eliminates residual stresses from manufacturing processes (e.g., forging, stretching, rolling), enhancing fatigue resistance and stress corrosion cracking resistance.
Corrosion protection: Improves inner wall quality and coating adhesion, ensuring long-term corrosion resistance and extending impact/vibration resistance.
Full automation: Supports automated modes including: • Material feeding and alignment • Clamping and positioning • 90° tilting • Gun insertion into the pipe • Synchronized pipe rotation and vertical gun movement
4. Unique capabilities: As the only shot peening equipment capable of treating small-bore pipe inner walls, it integrates an advanced abrasive recovery system and industrial-grade dust control units.
