How to safely operate dry shotcrete machine? China Coal Shotcrete Machine suppliers's friendly reminder that dry shotcrete machine spraying concrete operation must be carried out by a person in charge, and should not be replaced at will.
1.Preparation work before spraying machine
Add the lubricant in place (the dipstick is marked at the filler port) to ensure that the lubricant is clean. Connect various pipelines according to requirements to ensure that each pipeline is unobstructed. The electrical equipment of the connection inspection equipment must be reliably grounded. Check the hopper, and do not mix slender foreign objects such as ironware, wrenches, and iron wires. Guide the concrete mix and control the workability of the concrete (slump control in 80mm-150mm).
2.Precautions for sprayed concrete operation
Check the wind pressure of the dry shotcrete machine system. If it is less than 0.5Mp, do not start it. When preparing to open the wind, you must contact the sprayer, and slowly open the main damper, which will cause the nozzle to shake violently too fast, and the sprayer cannot control it, which is very likely to cause injury. Observe the changes in the system air pressure gauge and the working air pressure gauge. The smaller the system air pressure gauge, it means that there is a problem with the air compressor or the pipeline is damaged. The larger the work air pressure gauge, it means that the concrete fluidity is worse or the pipeline is blocked. The working pressure gauge becomes smaller, indicating that there is no more concrete in the hopper. Pay attention to the leakage of nine slurry holes under the rotor body. If the leakage is serious, it means that the piston is worn. Supervise the loading staff, require the loading speed to be uniform, continuous and moderate, and always keep a certain amount of concrete in the hopper to form a material column seal. According to the location of the sprayed surface and the performance of the concrete, the amount of the accelerator is appropriately adjusted.
