Remote dust-free concrete sprayer

Abstract

The invention provides a remote dust-free concrete sprayer and belongs to the technical field of concrete spraying devices used in underground coal mines. The remote dust-free concrete sprayer aims at solving the problems of short spraying distances and high springback rate of an existing sprayer. A feeding portion of the existing sprayer is improved, a conical feeder is adopted, at least two rotor material cups are annularly arranged on the surface of a feeding rotor of a cylindrical structure or a circular truncated cone shaped structure at intervals, the feeding rotor is in sealed connection with a feeding shell, the rotor material cups sequentially pass through a feeding port, a discharging port and a residual air port of the feeding shell along with the feeding rotor, when the rotor material cups gradually rotate to the discharging port of the feeding shell, an air supplementing port is communicated with the rotor material cups to enable materials in the rotor material cups to quickly enter a spraying portion, the rotor material cups continue to rotate along with the rotor and later pass through the residual air port of the feeding shell to discharge out residual air and materials in the rotor material cups so as to facilitate that the rotor material cups receive materials from a hopper portion again when continuing to rotate to the position of the feeding port.

Description

technical field [0001] The invention relates to a concrete sprayer for underground coal mines, in particular to a long-distance dust-free concrete sprayer. Background technique [0002] Concrete sprayer (shotcretemachine, concretesprayer) is a machine that uses compressed air to continuously transport concrete along the pipeline and spray it onto the construction surface. It is widely used in the lining construction of underground projects, shafts, tunnels, culverts, etc. [0003] At present, most domestic coal mines use rotor-type concrete spraying machines, which can be divided into U-shaped chamber rotor-type concrete spraying machines (that is, top-discharging concrete spraying machines, representing the model PC5U) and straight-through rotor-type concrete spraying machines. The spraying machine (that is, the bottom discharge concrete spraying machine, representing the model PC6I) is mainly used for dry and wet concrete spraying operations, and the spraying distance is 1...

AI Technical Summary

Problems solved by technology

The feeding part and the spraying part of the rotor concrete sprayer are arranged together (that is, it has only one material chamber, which is used for feeding and spraying at the same time), the seal is in a state of relative rotation during feeding and spraying, the sealing structure is unreliable, and It is very easy to wear and tear to cause seal failure, the spraying distance cannot be guaranteed and large dust is generated, the frequency of the material chamber passing through the discharge port is low, the pulse is large during spraying, and the material cannot be continuous

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