Shotcrete machine for spraying shotcrete onto mine side walls and roof in tunneling

Shotcrete machine for spraying shotcrete onto mine side walls and roof in tunneling 

The shotcrete machine for spraying shotcrete is mainly divided into two spraying methods, the dry shotcrete machine and the wet shotcrete machine. Wodetec has produced the shotcrete machine for many years, and the shotcrete machine has diesel engine, air mortar and electric mortar three engine for choosing. We can also custom the shotcrete machine for spraying shotcrete according your requirement.

When the dry spray machine is working, the added material is sssdry, and then it is pressurized by the air compressor to deliver the dry material to the sprinkler head, where the dry material is mixed with water and then sprayed out. Because the material is relatively dry, the dust of the dry jet is relatively large. In order to reduce the dust, a small amount of water can be sprinkled into the dry jet to slightly increase the humidity, but not too much, so as to avoid reducing the adhesion of concrete and other materials after mixing with water again at the sprinkler head, which will affect the spraying effect.

The spraying process of the shotcrete machine for spraying mine side walls and roof is to transport concrete to the working surface. The shotcrete machine for spraying mine side walls and roof pushes concrete into the nozzle position and adds a hydraulic accelerator to the nozzle. In the process of high-speed spraying, the concrete is perfectly combined with the accelerator. Wet spraying technology can effectively make up for the shortage of dry spraying and solve the problem of pollution of dry shotcrete. The wet shotcrete machine has low rebound, less dust, and easy control of the amount of water added. It does not depend on the skill and proficiency of the operator, and has lower operating requirements.

 

 

 

The shotcrete machine for tunneling is composed of feeding system, feeding system, air pipeline system, accelerating agent metering system, electrical control system, driving system, walking system and other main components.

When the shotcrete machine for tunneling is working, the piston in the material chamber of the rotor will be connected to the CAM through the piston rod and roller, forming a rotor piston CAM feed mechanism. When the rotor is rotating, the piston moves vertically in the rotor material cavity through the mechanism. The three material cavity pistons facing the hopper are in a downward process. The concrete in the hopper enters the rotor cavity under the combined action of the hopper vibration motor and negative pressure. The three material chamber pistons face upward toward the mixing tank. In this process, concrete in the material chamber is forced to be supplied to the mixing tank by a piston, and the rotor rotates once to complete the unloading and feeding cycle. The concrete material in the mixing bin is mixed with compressed air to form thin flowing foam, which is delivered to the nozzle through a concrete injection pipe and then sprayed.