Steel pretreatment line main components and structural features
Steel pretreatment line consists of roller conveyor system, shot blasting machine, automatic painting room, drying room, workpiece conveying system, paint mist filtration system, shot blasting dust removal system and electrical control system. Workpiece conveying system consists of feeding roller conveyor, shot blasting room roller conveyor, intermediate roller conveyor, plate chain conveyor, and sending roller conveyor. The system is driven by six frequency-controlled cycloid reducers, and the roller conveyor is kept between 0.5 and 6m/min by stepless speed regulation through frequency-controlled controller. All rollers are welded by thick-walled seamless steel pipes, and the rollers are supported by outer spherical bearings with straight-through oil cups on the bearing seats for regular lubrication.
1, shot blasting cleaning room: shot blasting machine is mainly composed of shot blasting room, front and rear sealing room, cleaning room, shot circulation purification system and shot blasting dust removal system.
2, shot blasting room: shot blasting room chamber for steel plate welded structure, indoor guard plate using ZGMn13 for guard plate, with high wear resistance, guard plate using block type assembly, installation, maintenance is very convenient. The two ends of the rollers are equipped with enigma type seals to prevent the pellets from entering the bearings. The inlet and outlet of the chamber are suspended with multi-layer rubber sealing curtain to prevent the pellets from flying out of the chamber. 6 high order shot blasting machines are distributed in hexagonal shape on the upper and lower chamber to ensure that the steel plates and sections are processed in a single pass.
3、Cleaning room: The surface cleaning of the steel plate after rust removal is carried out in the cleaning room, the cleaning room chamber body is a steel plate welded structure, which is connected with the shot blasting room. The cleaning room is equipped with a set of wear-resistant roller brushes, a pill collecting spiral and a row of high-pressure blowing pipes, which are lifted synchronously but with a fixed height difference. Brush lifting by the far-infrared height measuring device installed in the roller road automatic control, after the steel after blasting to clean the room, brush can automatically lift to a suitable position (so that brush contact workpiece), brush rotation will workpiece surface pills thrown to the collection spiral, the collection spiral will pill material transported to the lower chamber for circulation, wear-resistant roller brush can not only clean the steel plate, and can clean all kinds of sections (angle steel, channel steel, I-beam). Channel steel, I-beam). Especially for the I-beam its role is more prominent. After the roller brush cleaning workpiece, followed by high pressure blowing tube (driven by high pressure fan) will be its surface scattered pills and floating dust blowing clean, so that the surface of the workpiece does not leave pills and impurities, in order to improve the adhesion of the paint film.
4、Pill material circulation purification system: The pill material circulation purification system can be divided into two parts: pill material circulation system and pill material sorting purification device. The pellet material circulation is composed of pellet material bin, pellet pipe, fan valve, blasting machine, chamber, longitudinal spiral, transverse spiral, bucket elevator, separator spiral, etc.