Problems and solutions in the actual operation of the cement mortar spraying machine

- May 28, 2019-

In the actual operation of the cement mortar spraying machine, there will be some phenomenon that the rotor is clogged, the discharge elbow is blocked, and the sandblasting tube is blocked. Now let's analyze the causes and solutions of these problems.

Reasons for the nozzle of the shotcrete machine, the discharge elbow or the feed pipe are blocked: 1. The aggregate particle size is too large 2. The water content of the dry mix is too large 3. The conveying gas pressure is too low 4. The inlet pipe section is too Small, the air volume of the pressure fan is small

For the solution of 1. Oversize material: When the conveying pipe is blocked, the machine should be stopped, the gas path valve should be closed, the conveying pipe should be removed from the elbow, and the gas path valve should be opened to blow out the storage material of the rotor. Then inspect the delivery tube, tap the block with a wooden stick, loosen or hollow the blockage (note: the pressure in the feed pipe should be reduced to 0 before disassembling the elbow or pipe). The material pipe is then connected to the elbow and blown out by the compressed air. If the conveying distance exceeds 40m, the pipe should be treated every 20m long.

For the solution of 2, the dry water content of the dry mix is too large: stop the machine rotation, close the air line valve, if the discharge elbow is blocked, the pipe should be dismantled, the elbow and the rotor cavity should be cleaned, and the mixing should be reduced. Mixing water-cement ratio.

For 3, the solution air flow pressure is too low: stop the motor and supply air line, if the rotor is blocked, the air inlet pipe and the upper air pipe should be disassembled, and the rotor material cavity should be cleaned with a brush.

For 4, the inlet duct section is too small, and the air supply volume of the pressure fan is small. The solution is to replace the large section duct and replace the large capacity fan.

cement plaster spraying machine-010