Novel pressurization type powdery accelerator adding device

Abstract

The invention discloses a novel pressurization type powdery accelerator adding device. The novel pressurization type powdery accelerator adding device comprises a screw propeller which is composed of an outer shell and a screw shaft, the upper portion of the head end of the outer shell communicates with a hopper, the tail end of the outer shell is movably connected with a jet cavity, and a spiral blade at the tail portion of the screw shaft is of an intermittent structure which is spirally composed of spiral blade segments at intervals or is composed of notches formed in the continuous spiral blade at intervals. A thread shaft section is arranged at the tail end of the screw shaft and provided with a pressing plate, a spring and a pressing sleeve, an axial stop rod is arranged on an end surface of the pressing plate, a radial stop rod is arranged on a cylindrical wall of the pressing sleeve, and the radial stop rod corresponds to the axial stop rod. The novel pressurization type powdery accelerator adding device can tightly pressurize a powdery accelerator output by the screw shaft, so that the capacity of the powdery accelerator for resisting impact from high-pressure gas is improved. The pressing plate can move axially on the thread shaft section but can not rotate, and thus the screw shaft is effectively prevented from being damaged.

Description

Technical field: [0001] The present invention relates to a quick-setting agent adding device, in particular to a novel pressurized powder quick-setting agent adding device. Background technique: [0002] With the rapid development of road traffic construction and mineral construction, construction units need to dig various tunnels, and the support and reinforcement of the top of the tunnel has become a difficult and key point of construction, especially it is not easy to quickly apply concrete, and manual application of concrete costs Labor, time-consuming and inefficient. In response to this situation, people have developed some concrete wet spraying machines, which mix the cement, sand and stone mixture according to a certain ratio by the rotor, send compressed air to the nozzle through the delivery pipe, and then spray water to the construction site. On the surface, to achieve the purpose of rapid concrete reinforcement. At present, the quick-setting agents used in conc...

AI Technical Summary

Problems solved by technology

At present, the quick-setting agents used in concrete wet spraying machines are liquid or powder. The liquid accelerator has a strong smell and the working environment is harsh. In addition, there is a problem of high cost. The powder accelerator is low in cost and has a good working environment. However, the equipment for adding the powdered accelerator has the following disadvantages: 1. The compactness of the powdered accelerator is insufficient and cannot withstand the impact of a certain high-pressure gas; 2. The powdered accelerator is extruded with the rotating screw shaft , a large amount of frictional heat energy is generated, which can easily cause damage to the adding device and affect work efficiency

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