The problem and solution of shot leakage at the exit of shot blasting machine

The problem and solution of shot leakage at the exit of shot blasting machine

1. The problem and phenomenon of shot blasting at the exit of shot blasting machine:

After the steel strip passes the shot blasting inside, a large number of steel shots stay on the surface of the steel strip. In order to remove the steel shots staying on the surface of the strip, a set of steel brushes were installed between the throwing chamber and the purge chamber for sweeping, and then the second purge was performed with high-pressure gas in the purge chamber. However, in actual operation, even if the steel shot on the surface of the steel strip is cleaned twice, the steel shot on the steel strip cannot be cleaned. There are still a large number of steel shots with the steel strip out of the shot blasting machine, resulting in There is serious leakage of steel shots at the exit of the pill machine, and the average monthly leakage of steel shots is about 3 to 5 tons.

A large amount of leakage of steel shots caused unnecessary waste of steel shots, and increased the amount of extra labor to clean up the steel shots, which had a great impact on the surrounding environment. The steel shot thrown on the ground poses a safety hazard for the operation of the operator, which brings inconvenience to the equipment maintenance personnel's equipment inspection and maintenance work.

Second, the solution to the problem of shot blasting at the exit of the shot blasting machine

In view of the problem of steel shot leakage at the exit of the shot blasting machine, after an on-site investigation, an improved plan for adding a set of steel shot collection devices at the exit of the shot blasting machine was proposed. The working principle of the steel shot collection device is to collect the steel shots coming out of the steel belt through the brush roller to collect the steel shots into the conveying screw, and then the conveying screw conveys the steel shots to the shot blasting machine and enters the elevator Recycling.

The steel shot collection device is composed of conveying screw, roller brush, transmission gear motor, device casing and so on. The position of the brush roller of the steel shot collection device can be adjusted according to the wear of the brush roller to meet the function of the equipment for cleaning the steel shot. Combined with the effective space on site and the actual situation of the equipment, the measurement determined the reasonable specific installation location and installation size of the steel shot collection device.

In order to realize the further recycling of steel shots, a steel shot collection trough is also installed under the steering roller. The collection trough is connected to the outlet of the steel shot collection device. The collection trough is inclined at 45 °, and some remaining steel shots continue to be taken out. During the process, the steel shots will fall into the collection tank, and then flow into the steel shot collection device to convey the screw.