Composite type nozzle used for 3D printing of similar physical models and working method of composite type nozzle

Abstract

The invention discloses a composite type nozzle used for 3D printing of similar physical models and a working method of the composite type nozzle. According to the nozzle, an anchor rod implanting module and an extrusion nozzle module are arranged at the two ends of a connecting module correspondingly, the anchor rod implanting module comprises an implanting shell body, a top and bottom anchor rod output device and a side anchor rod output device, an anchor rod storage barrel is fixedly connected to the upper end of the implanting shell body, an anchor rod storage groove is formed in the upper end of the implanting shell body, the top and bottom anchor rod output device and the side anchor rod output device are both arranged in the implanting shell body, the top and bottom anchor rod output device and the side anchor rod output device are the same in structure and are each composed of an output nozzle, a first meshing driving wheel and a second meshing driving wheel, the extrusion nozzle module comprises an inter-module connecting block, two connecting blocks and two nozzle bodies. The method comprises the following steps of determining proper reduction scale and printing parameters; preparing a cement-based material, and connecting a material pumping pipeline; staring printing; synchronously outputting anchor rods; forming a supporting system; and testing and analyzing. According to the nozzle, reduced-scale anchor rod supporting components can be automatically and synchronously implanted in the 3D printing process of the similar physical model.

Description

technical field [0001] The invention belongs to the technical field of concrete 3D printing in the field of mine rock and soil, and in particular relates to a composite nozzle for 3D printing similar physical models and a working method thereof. Background technique [0002] The similar physical simulation method is an effective means to invert the real geological engineering response in the mine geotechnical field. This method is generally carried out in the laboratory. By constructing a scale model and simulating the real geological conditions and excavation steps, it can be loaded by means of To obtain the displacement field, stress field, roadway deformation and other characteristics of the rock and soil mass during the deformation failure process. This method has been widely used in related research fields due to its low economic cost, relatively simple operation process, and relatively intuitive results. It is one of the indispensable methods for studying rock and soil...

AI Technical Summary

Problems solved by technology

In the prior art, the similar model constructed based on this method has the following disadvantages: it is difficult to control the interlayer strength, it is difficult to maintain a uniform thickness of the rock layer, the strength of the rock layer cannot match the target rock layer, the amount of manual work is large, and the maintenance of the specimen is difficult. longer, more affected by environmental factors, etc.

In the prior art, there is no 3D concrete printing nozzle with the function of synchronous anchor rod implantation, thus, the printing efficiency of similar physical models is reduced, and at the same time, the anchor rods need to be implanted manually, which increases the labor of the operator strength

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