First, the preparation of dry spray gun before starting work 1, first of all, check the dry type spray gun joint fastening is correct and reliable.
2. Start the machine to check if the direction of rotation is correct (same direction as the arrow).
3, check the pressure applied to the rubber plate, first hand lock the nut on the device until it is tight, and then use the plate on the hands tightly 2-3 times until the rubber plate does not leak.
4, open the air valve, decompression feeding pipe pressure is about 0.5Mpa, there is no air pressure leakage rubber seal, indicating that the degree of fastening is just right.
Second, the dry spraying machine operation process 1, spray machine operator holding the gun, toward the wall, the gun head to the injection site to maintain the 0.8-1.2m, ready to jet preparation.
2. Before starting the machine, first open the main valve, and open the valve on the upper wind road to open 1/3 turn, and adjust the air outlet to an air pressure of about 0.6-1 Mpa.
3. The sprayer opens the sprinkler water valve and flushes the surface of the prewet rock mass (spray site).
4. The shotcreting machine is started, and the loader adds concrete materials to the machine silo and incorporates an accelerating agent. When charging the material, the continuous and uniform feeding of the material is to be maintained, and the spraying operation is started.
5, when the injection must first make up after the first uniform injection, and then double spray to meet the design requirements.
6. When spraying the concrete, the nozzle shall be sprayed as far as possible perpendicularly to the surface of the nozzle. It shall be evenly moved with a half circle of the circle of the screw. The diameter of the nozzle ring is approximately 200-300mm, and the width of each nozzle should be 1.0-1.5 meters.
7. Spraying a hand to spray concrete requires an assistant to illuminate and connect signals from the side at a distance of 5m from the injection site.
8, stop the injection operation, to stop loading, first stop the spraying machine, until the remaining material in the conveying pipe is blown out, no material is ejected, the water valve can be closed, and finally the total wind valve is closed.
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