A dust-free feeding, mixing and spraying machine and its control system

Abstract

The invention relates to a dust-free feeding, stirring and spraying integrated machine and a control system thereof, which belong to the field of automatic spraying control and dust removal. The all-in-one machine includes a closed spraying machine and a feeding conveyor; the dust generated by the workers when they are feeding at the feeding port and the dust sprayed from the joint gap of the spraying machine are enclosed in the casing, and the dust is ejected by the pneumatic ejector. After the dust is extracted, it is discharged into the spray pipe through the dust discharge pipe. The discharged dust and the slurry sprayed by the spray machine flow through the three-way check valve and mix in the spray pipe, and finally sprayed by the spray gun to the wall of the rock and roadway. superior. The linkage protection control system of the feeding motor and the mixing motor can prevent the motor from stalling and heating up and the slurry from jamming, eliminating potential safety hazards, improving the working performance of the dust-free feeding, mixing and spraying machine, and reducing the labor of workers It improves the working efficiency of shotcrete, improves the working environment of workers, and guarantees the automatic operation of shotcrete in mines and tunnels.

Description

technical field [0001] The invention belongs to the field of automatic spraying control and dust removal, and relates to a dust-free material feeding, stirring and spraying integrated machine and a control system thereof. Background technique [0002] At present, in the process of mining, hydropower and tunnel construction, the use of concrete shotcrete machine for initial spraying, re-spraying and supplementary spraying and other shotcrete support is a key process and an important safety guarantee technical measure in the support of tunnels and roadways. . Before spraying, cement, river sand, and stones need to be stirred and mixed, and then rely on compressed gas to be sprayed and transported to the spray head. Usually the mixing and spraying are integrated and referred to as the shotcrete machine. The worker has to lift the material into the mixing bucket. During the input process, the material will be thrown and fly, and the material will also fly when mixing. The compr...

AI Technical Summary

Problems solved by technology

In order to prevent the situation that the feeding and stirring jet cannot be coordinated and synchronized in a closed state, for example, too much feeding causes the mixing tank to overflow and cannot be detected from the appearance, or the scraper chain is too large when feeding. Stuck, these conditions will cause the mixing or conveying motor to stall, causing the motor to heat up, which is very dangerous to use underground

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