Shotcrete machine for coal mine
Working principle and structural features of shotcrete machine for coal mine 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 sprayed concrete operations use rotor type concrete sprayers, because the sprayers are 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 jet machine are: 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 shotcrete machine for mine 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.
The shotcrete machine for mine can automatically add water, stir, continuously convey, add liquid accelerator and spray the mixed dry material. It is an anchor and shotcrete machine for mine with better comprehensive performance in coal mine machinery, such as reducing dust, reducing rebound, and saving materials. We have made bold improvements in the structure. The newly designed elastic material cavity and swirl tube greatly improve the ability to handle wet materials and the service life of wearing parts, and reduce the weight of the whole machine. It is widely used in mines, culverts, building foundation pit support, river slope protection and other projects.
The working principle of the shotcrete machine for mine: Put the mixed dry materials into the hopper of the mixer uniformly manually, open the air valve and the ball valve of the water adding device, the materials are humidified by the mixer and mixed evenly and then sent to the jetting machine. Then, the mixed material is sprayed to the sprayed surface by the conveying pressure gas through the feeding pipe and spray head. When the mixture enters the nozzle and is about to be ejected, it is mixed with the liquid accelerator output from the accelerator pump to achieve the purpose of accelerating the solidification of concrete.
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