Composite nozzle for 3D printing similar physical model and its working method

Abstract

A composite nozzle for 3D printing similar physical models and its working method, the nozzle: the anchor rod implantation module and the extrusion nozzle module are respectively arranged at both ends of the connecting module; the anchor rod implantation module includes an implantation shell, The top and bottom bolt output device and the side bolt output device are implanted into the upper end of the shell and are fixedly connected with a bolt storage barrel, and the upper end is provided with a bolt storage tank; into the shell; the structure of the top and bottom bolt output device is the same as that of the side bolt output device, both of which are composed of the output nozzle, the first and the second occlusal driving wheel; the extrusion nozzle module includes a joint block between modules, two joints block and two nozzles. Methods: Determine the appropriate reduction ratio and printing parameters; deploy cement-based materials, connect material pumping pipelines; start printing; synchronously output anchor rods; form a support system; test and analyze. The invention can automatically and synchronously implant scaled-scale bolt support components in the process of 3D printing of similar physical models.

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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