The dry shotcrete machine is a kind of construction equipment widely used in engineering construction. It uses compressed air or other power to transport the mixed material in a certain proportion through a pipeline and spray it on the sprayed surface at a high speed to harden, thereby forming a concrete supporting layer. The sprayed concrete technology is simple and convenient, the construction cost is low, and the adaptability is wide. It has played an important role in various construction fields. At present, most of the shotcrete machine operations use rotor type concrete sprayers, because the dry shotcrete machine is simple in structure, reliable in working performance, small in size, light in weight, and easy to maintain and operate. The working principle and structural characteristics of the dry shotcrete machine is: the rotor with the lining plate rotates at a certain speed, and the binding plate is pressed on the lining plate and fixed, and the joining plate is connected with the air inlet pipe and the discharge elbow. When each cup with materials in the rotor rotates to communicate with the air inlet pipe and the discharge elbow, under the action of air pressure, the material is transported to the nozzle through the discharge elbow and the conveying pipe, and water is added at the nozzle. Jet out. In this process, the sealing pair composed of the bonding plate and the lining plate plays a role of sealing the pressure and materials. The main advantages of dry concrete spraying machine are long conveying distance, simple equipment and durable. However, because it mixes the dry mixing concrete nozzle with water, the construction dust and rebound are relatively large. The dust generated by dry spraying operation harms the health of workers, especially in the construction of narrow roadways, the dust pollution is more serious.
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