Wet concrete spraying machanical arm is a very suitable concrete spraying machine for large-scale concrete projects at present, which can effectively save human resources and construction time, especially for the places where manual spraying is difficult in tunnel projects, more and more concrete engineering projects have begun to use it. The wet concrete spraying machanical arm replaces the construction, but the machanical arm construction also needs to be equipped with certain operators. How to operate the wet spraying manipulator? The following editor has sorted out the operation methods and spraying skills of the wet spraying manipulator for your reference.
4. Adjust the spray distance
The normal concrete injection distance is 1~2m. If the distance is too small, it will not be able to form layers, because the jetted concrete will be blown away by the subsequent strong impact as soon as it hits the rock surface; if the distance is too close, the jetted concrete will not be able to meet the bonding and bonding due to insufficient impact force. compact requirements. Improper distance will cause a sharp increase in the amount of rebound, resulting in very little concrete that can be sprayed to the rock surface. On the contrary, if the reasonable distance between the nozzle and the rock surface is adjusted according to the flow rate of the concrete at the nozzle, the rebound amount can be controlled to a small range, so how to accurately grasp the nozzle distance is very important.
In addition, when the concrete slump changes, the injection distance also needs to be adjusted appropriately. When the slump is small, the injection distance takes a small value; when the slump is large, the injection distance takes a small value. The jetting distance of small slump is 1~1.2m, and the jetting distance of large slump can reach 1.5~2m; at the same time, the jetting distance should be as small as possible during rough jetting, and the jetting distance should be as small as possible when leveling the surface. It may be large, and the spray distance at the leveling of the spray layer can be enlarged by 2~2.5m.