What is Roller Type Shot Blasting Machine?

Shotblasting machine consists of shot blasting chamber, impeller head, pellet recovery system, elevator, separator, dust collector system, electric system.

Roller type shot blasting machine mainly clean H-shaped steel and other large slender workpieces. The workpieces length is 8-12 meter or longer, and the shot blasting chamber is made up of three parts which one main shot blasting clean chamber, two deputy clean chamber. In general, the impeller head numbers are 8pcs, to ensure all parts of workpieces can be shot.

The composition of roller type shot blasting machine:

1. Roller conveyor system

l The roller conveyor system consists of input roller table, shot blasting clean chamber roller table, and output roller table.

l The roller shaft is welded by high-quality carbon steel seamless steel tube and tempering spindle nose. All of the spindle nose and roller body will be processed after welding. Guaranteeing both load bearing and the coaxially.

l All roller tables are loaded with high wear resistant sheath.

l Both ends of bearing of the shot blasting clean chamber and sealing chamber use labyrinth seals. To ensure no shots and dust enter the bearing.

2. Shotblasting rust cleaning system

l Shot blasting rust cleaning system consists of front sealing chamber, shot blasting chamber, back sealing chamber, pellet recovery system, dust collector system and so on.

2.1 Front sealing chamber

l The sealing chamber is welded structure with steel plate and shaped steel, which can become a big cleaning space. All protection board can be replaced conveniently, and the airtight is excellent, there will no pellets flying out. The top of sealing chamber has a dust removal pipe, all the dust pass through this pipe into the dust collector system.

2.2 Shot blasting chamber

l Shot blasting chamber is welded by high-quality steel and steel plate, and wear resistant protective board is adopted in the shot blasting chamber. The advantages of abrasive resistance well and convenient maintenance.

l The impeller head is adopted with 3D simulation and optimal design, to ensure that the workpieces are processed at one time.

l Shot blasting chamber import and export are equipped with workpiece induction device, when the workpieces had been detected into shot blasting chamber, then start automatic ally shot blasting. If no workpieces, it will automatically stop shot blasting.

2.3 Impeller head

l The machine has 8pcs impeller heads. We use the company produced p11 type impeller head.

l It has the following advantages:

Ø High efficiency: Special impeller equipment structure, when the shot speed is 80m/s, shot blasting efficiency can reach 20kg/min·kw.

Ø Blade loading and unloading are very convenient: because the blade of the impeller head is inserted from the center of the impeller. The blade is fixed by centrifugal force during the rotation of the impeller, so it is no need for any clamping tool. When remove the blade, just tap the outer ends of the blades can easily remove the leaves. It takes only 5-10 minutes to remove the 8 blades and to check the impeller equipment and the steering sleeve simultaneously.

Ø The shell fixed axis and steering sleeve hole is a one-time processing, which can make the gap between the steering sleeve and impeller equipment of the uniform. Not only reduces the abrasion of the impeller equipment and the extrusion of the steering sleeve, but also greatly improves the shot blasting efficiency.

Ø The accuracy of the blade is very strict. To ensure the balance of the shot blasting machine operation, and greatly reduces the equipment noise.

2.4 Pellet recovery system

l The screw drive system is equipped with a photoelectricity induction system. When the screw driver goes wrong, the electrical system will be alarmed, and the machine will stop running.

2.5 Pellet separator

l Used to separate good pellets, broken pellets, dust. The good pellet enters the storage bin and is recycled again. The broken pellet falls into waste cylinder through the sand tube, and dust is sucked into the dust collector system through the pipe. Separator efficiency>99.5%.

2.6 Semi-automatic flow valve

l This is an air operated pellet gate valve. This is a device that control switches by cyclinder and controls the shot blasting flow. This avoids the control valve due to lax closure caused by the motor burns, shot blasting machine blockage, shot empty throwing and wounding phenomenon. Adjusting the bolt on the pellet controller, the required shot blasting quantity can be obtained.

l The top of each flow valve is equipped with a manual shut-off valve. If it is necessary to maintain the flow valve, it can be closed to prevent the pellet entering impeller head from a storage bin.

2.7 Elevator system

l Elevator system is composed of reduction box, upper and lower wheel hub, conveyor belt, hopper, closed shell, anti reverse mechanism, and tightening device.

l The feed charge door of the bucket elevator is connected with the screw conveyor and the discharge port is connected with the separator.

l The helmet of elevator is adopted to weld structure of bending forming. The lower shell of the hoist is equipped with a testing door, which can be used for repairing and replacing lifting hoppers.

l The machine adopts flat belt rotation. When it working, The hopper is fixed on the conveyer belt will sweep the bottom pellets. Then under the drive of elevator power, the pellet is sent to the top of the elevator, and finally, the pellet enter the separator by centrifugal gravity. The hub is made into a squirrel cage, enhancing the frictional force between the belt and the pulley, and avoiding the slipping off the pulley. The precipitatig force of the belt is reduced, the service of the belt is extended.

l The elevator is equipped with a set of a tensioner. When the belt is loose, the belt can be tightened by adjusting the adjusting bolts on the upper sides of the elevator.

l The lower shaft of elevator equipped with induction system, it can detect the working state of the elevator, once the elevator appears faults, the induction device timely send a signal to plc, pls will alarm, Inform staff for maintenance. Ensure the safe operation of the equipment.

2.8 Screw conveyor

l The srcew conveyor consists of reduction box, screw shaft, transmission cover, bearings etc.

l This part of our company has realized serialization, versatility, interchangeability, stable and reliable performance, the entire spiral shaft welding after the overall processing, thus ensuring the coaxial screw shaft.

l The screw conveyor delivers the collected pellets from the bottom hopper to the bucket elevator. This part is an important part of the equipment of the circulatory system, the outer circle are processed by the special process of stretching, pitch, cylindrical dimensions are very precise, improve the spiral life, reduces running noise.

2.9 Dust collector system

l The dust collector system consists of a impulse valve, a fan, a fan pipe,etc.

l The dust collector system uses a cartridge filter. Dust on the filter cartridge is cleaned by electromagnetic pulse valve. Filter cylinder made of flame retardant material, the advantages of the filter is high efficiency, fireproof, and safety. We need to regularly check whether the filter cartridge need to be replaced, to prevent the filter cartridge is blocked, causing reduce the remove dust effect. We are adopting to the secondary filter technology, and the dust emission is less than 20mg/m3.

3.0 Electic system

l All electrical components uses Chinese well-known brand and well-known brand manufactures products. The whole system is manual operation, convenient debugging and maintenance personnel to adjust the equipment. At the time of adjustment, the operator may start the functional components in sequence or not. In order to test the performance and operation of the relevant components.

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