After the selection of mortar spraying machine, sometimes mechanical failure will affect the construction progress in the process of engineering operation, and it will increase the construction cost without affecting the construction progress. How to avoid mechanical problems in the construction? The editor will tell you about the common trouble, how to deal with it and how to solve it.
1、 The flow of sprayer is smaller and uneven
In the process of construction spraying, the flow suddenly becomes small or the discharge is uneven. Generally, there are several reasons as follows. The long distance of the pipe of the shotcrete machine will cause the insufficient flow. Under normal circumstances, the use is controlled within 40 meters, and the farther the distance is, the friction between the mortar and the pipe wall. The mortar spraying machine basically has no floor ash, saves water and materials, and can reduce the cost by more than 20%. The pressure increases, resulting in a gradual decrease in flow. The movement of the air rod in the spray gun causes uneven discharge. Before each spraying, check the center distance between the air rod and the spray gun, and the front and back distance. If the air at the discharge port is abnormal, poor atomization will also occur. Check the air.
Solution: check whether the compressor operates normally. Generally, the air pressure is between 0.4-0.6mpa. At the same time, check whether the air pipe leaks and whether the air rod is blocked. After the mortar spraying machine is finished, the surplus materials in the hopper shall be drained out, and sufficient water shall be injected into the hopper to clean the hopper, and the pump shall be started up to clean the hose and nozzle until all the water is pumped out, so as to avoid the solidification of the surplus materials in the hose type and blocking the hose and nozzle.
2、 Causes and solutions of mortar pipe plugging
The phenomenon of pipe plugging caused by too high pressure during spraying is that the conveying distance is too far and the pressure is too high when the height is too high. The other is that the foreign matter at the nozzle is blocked, which causes the pressure in the mortar pipe to rise, which causes the bleeding at the interface, and causes the phenomenon of pipe plugging. The phenomenon of pipe plugging is usually premonitory. During the spraying process, the flow is obviously reduced, and the working pressure is at the same time Gradually rise, at this time, the staff should stop the machine in time. The early stage of pipe plugging is generally at the discharge port, and the cleaning of the connecting pipe is relatively simple. The price investment of mortar spraying machine is small and the income is large. If every spraying equipment is sprayed with 1000 ㎡ every day, calculated by the market average price of 4 yuan per ㎡, and the wages of workers are about 1000 yuan, every equipment can gain 3000 yuan every day. Besides other factors, the annual income is more than 500000 yuan.
Solution: if the pipeline is seriously blocked due to not stopping the machine in time, it can only be eliminated by cleaning the pipeline with water, and the appropriate hose shall be selected for flushing from the bottom right to the top.
3、 Main working motor fails to start
The long distance of mortar transportation increases the resistance of mortar transportation, which exceeds the effective load of the motor. Therefore, within the effective spraying distance of the mortar spraying machine, the transportation distance shall be shortened as much as possible, and the resistance of the centrifugal mixer due to insufficient lubrication shall be increased. Each shift shall be forced to inject oil into the mixer with a professional oil pump, and the external power line shall be too thin. Generally, the power line shall be 6 square meters of the national standard within 50 meters, The power line must not be over specified to cause abnormal current and voltage.
4、 Air compressor fails to start
Solution: the pressure switch is too high, or the switch on the air compressor is not opened, and the air valve switch on the spray gun is not opened. The air needle in the spray gun is blocked. Turn on the air pump before starting each time, and turn off the air pump after shutting down, so as to prevent the cement slurry from flowing back into the air needle and causing blockage.
