Concrete 3D printing experiment system

Abstract

The utility model discloses a concrete 3D printing experiment system which comprises a material adding system, a pumping system, a printing system and a computer control system, the material adding system is connected with the pumping system through a feeding pipe, the pumping system is connected with the printing system through a connecting pipeline, and the computer control system is connected with the printing system. And the printing system is wirelessly or electrically connected with the computer control system. The concrete 3D printing experiment system is simple in structure, convenient to operate, wide in application range and capable of achieving fine operation of concrete 3D printing.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of concrete 3D printing, and particularly relates to a concrete 3D printing experiment system. BACKGROUND

[0002] At present, 3D printing is increasingly popular in the field of construction, and compared with traditional construction methods, 3D printing has great potential, such as greater architectural freedom, faster construction speed, less labor cost, reduction of work-related injuries and less waste. Therefore, these advantages promote the construction industry to gradually adopt the technology in certain specific circumstances. As a new type of technology, 3D printing concrete needs to continuously conduct in-depth research on aspects such as selection of raw materials, mix proportion design and preparation theory, and use of admixtures, so as to improve the performance requirements; needs to continuously research on supporting software, so as to make 3D printing more automated and achieve the best effect; also needs to continuously develop research on 3D printing machinery, so as to realize high-rise printing and make the printed building better developed in the direction of high-rise building; and needs to continuously improve the contour process, so as to realize fine construction and the requirement of surface refinement, and make the printing develop towards fine products. Therefore, it is urgent to design a new type of 3D printer suitable for the field of construction and a concrete 3D printing experiment device to research on new type of concrete material suitable for the 3D printer. SUMMARY

[0003] The utility model solves the technical problem of providing an experiment system which is simple in structure, convenient to operate, widely applicable, and capable of realizing fine operation of concrete 3D printing.

[0004] The technical scheme of the utility model discloses a concrete 3D printing experiment system, which comprises: a material adding system, a pumping system, a printing system and a computer control system, the material adding system comprises: a material level controller, a storage bin and a speed and flow regulator, the material level controller is fixedly connected with the top of the storage bin, one side of the top of the storage bin is provided with a feeding port, a spiral agitator A is arranged in the storage bin, the speed and flow regulator is fixedly connected with the bottom of the storage bin, and the material adding system is placed on a supporting frame.

[0005] Further, the material level controller is a MCS-51 single-chip microcomputer cement material level meter.

[0006] Further, the pumping system is fixedly connected with the extrusion bin through a feeding pipe.

[0007] Further, the computer control system comprises: a computer command system and an automatic mechanical controller, the computer command system is electrically connected or wirelessly connected with the automatic mechanical controller, and the automatic mechanical controller is connected with the mechanical arm.

[0008] The utility model discloses the beneficial effect:

[0009] 1. The material adding system separates the admixture adding system and the premixing material mixing adding system, can more conveniently and timely add or control each material component, the agitator is designed with different stirring speed and stirring time, can make each component of concrete fully mix, saves manpower and time, makes full material preparation for subsequent concrete printing. The material level controller can monitor the horizontal position of the material in the material bin in real time, and the operator only needs to supplement the material to the material bin at intervals, thereby improving the production efficiency.

[0010] 2. The pumping system also separates the premix peristaltic pump and the additive peristaltic pump, which are connected to the admixture addition system and the premix mixing addition system respectively. In addition, two different diameter conveying pipes are designed according to the diameter of different materials for conveying materials. This design makes it easier to control the flow rate of premix and additive as well as the pumping flow rate.

[0011] 3. The printing system is equipped with a base and rolling casters, allowing for free movement and reducing limitations on the printing range and direction. The printing controller is connected to a robotic arm, which is equipped with telescopic joints to transmit computer system commands more quickly and accurately, effectively preventing the printing position from deviating from the preset trajectory.

[0012] 4. The section before the print head extrudes concrete is equipped with an automatic stirring rod. This spiral-shaped stirring rod ensures thorough mixing of the premixed material and additives such as accelerators pumped by the peristaltic pump, shortens the action time of the accelerators, allowing the concrete to quickly solidify and maintain sufficient strength to support the density of subsequent layers. It also provides downward thrust to facilitate material extrusion and prevent nozzle clogging. The print head connects to the pumping system, extruding material while printing the building structure along a preset trajectory and speed. Scrapers attached to both sides of the print head automatically extend to shape the concrete, effectively preventing layering effects, surface roughness, and obvious transverse striations. In this continuous process, layers of concrete material are extruded through the nozzle and stacked to form a physical subway station building or part of its structure.

[0013] 5. Using the 3D-printed concrete experimental system, the compressive strength of the obtained structures is in the range of 100MPa-110MPa, and the flexural strength is in the range of 12MPa-13MPa. By controlling the types and proportions of various materials and additives through the controlled variable method, and repeating the printing and strength tests, a multi-faceted analysis can be conducted to obtain more comprehensive and broad data references. This allows for the identification of the optimal types and proportions of materials and additives, further improving the strength of buildings, and providing suggestions and references for the research of 3D-printed concrete materials in practical engineering. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a diagram showing the usage status of a concrete 3D printing experimental system according to this utility model.

[0016] Figure 2It is a material adding system structure schematic view of the concrete 3D printing experiment system.

[0017] Figure 3 It is a printing system structure schematic view of the concrete 3D printing experiment system.

[0018] Figure 4 It is a nozzle structure schematic view of the concrete 3D printing experiment system.

[0019] Figure 5 It is a work flow chart of the concrete 3D printing experiment system.

[0020] In the figure: 1 - feed inlet, 2 - spiral agitator A, 3 - support frame, 4 - material level controller, 5 - storage bin, 6 - speed and flow regulator, 7 - feeding pipe, 8 - peristaltic pump, 9 - additional storage bin, 10 - spiral agitator B, 11 - discharge port, 12 - operation bearing platform, 13 - pulley, 14 - base, 15 - support arm, 16 - mechanical arm, 17 - extrusion bin, 18 - spiral extrusion structure, 19 - nozzle, 20 - leveling scraper. DETAILED DESCRIPTION

[0021] In the description of the present application, it should be explained that, unless otherwise explicitly specified and limited, the term "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, it can be directly connected, or indirectly connected through intermediate medium, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above-mentioned term in the present application can be understood according to the specific circumstances.

[0022] For example, Figures 1-5The experimental system for 3D printing of concrete comprises a material adding system, a pumping system, a printing system and a computer control system, the material adding system comprises a material level controller 4, a storage bin 5 and a speed and flow regulator 6, the material level controller 4 is fixedly connected with the top of the storage bin 5, one side of the top of the storage bin 5 is provided with a feeding port 1, the storage bin 5 is provided with a spiral agitator A2, the speed and flow regulator 6 is fixedly connected with the bottom of the storage bin 5, and the material adding system is placed on a support frame 3; the pumping system comprises a peristaltic pump 8 and an additional storage bin 9, the peristaltic pump 8 is fixedly connected with the additional storage bin 9, the additional storage bin 9 is provided with a spiral agitator B10, the bottom of the additional storage bin 9 is provided with a discharging port 11, the discharging port 11 is fixedly connected with the printing system through a connecting pipeline, the pumping system is placed on an operation bearing platform 12, and the pumping system is fixedly connected with the material adding system through a feeding pipe 7; the printing system comprises a base 14, a support arm 15, a mechanical arm 16, an extrusion bin 17, a nozzle 19 and a leveling scraper 20, the bottom of the base 14 is provided with a pulley 13, the top of the base 14 is provided with the support arm 15, one end of the support arm 15 is fixedly connected with the mechanical arm 16, the other end of the mechanical arm 16 is fixedly connected with the extrusion bin 17, the extrusion bin 17 is provided with a spiral extrusion structure 18, the lower part of the extrusion bin 17 is fixedly connected with the nozzle 19, and the outer side of the nozzle 19 is fixedly connected with the leveling scraper 20; the printing system is electrically connected or wirelessly connected with the computer control system.

[0023] Preferably, the material level controller 4 is a cement material level meter of MCS-51 single-chip microcomputer.

[0024] Preferably, the pumping system is fixedly connected with the extrusion bin 17 through the feeding pipe 7.

[0025] Preferably, the computer control system comprises a computer command system and an automatic mechanical controller, the computer command system is electrically connected or wirelessly connected with the automatic mechanical controller, and the automatic mechanical controller is connected with the mechanical arm 16.

[0026] In use, firstly, the shape and size information of the target building or structure is drawn in a computer command system with suitable software (such as Inventor, Solid Works), the system has complete control language G code, the position of the extrusion head can be clearly observed through the path code of the G code, and then the information is imported into the automatic mechanical controller to adjust the printing track, printing speed and the like to control the movement of the mechanical arm 16; then, the concrete material, fiber material, additive and the like required by the target building or structure are prepared and the suitable mixing proportion and water-cement ratio are adjusted, and then the materials are respectively poured into the storage bin 5 and stirred by adjusting the speed of the spiral stirrer A2; then, the parameters of the material position controller 4 are pre-set, and the storage of the concrete is monitored in real time; then, the valve of the feeding pipe 7 is opened, the stirred concrete is pumped to the extrusion bin 17 of the printing system according to the required flow rate through the peristaltic pump 8, and then the premixed material and additive pumped to the extrusion bin 17 are stirred for the third time before being printed and extruded by the nozzle 19, and then the nozzle 19 prints the building entity or structure entity along the preset track and speed of the computer while the leveling scraper 20 automatically extends to level the surface of the extruded concrete; finally, the building entity or structure entity can be detected and tested for fluidity during the printing process, and the experimental system can be stopped after the printing is completed.

[0027] The embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made to the utility model within the knowledge range possessed by the person skilled in the art.

Claims

1. A concrete 3D printing experimental system, characterized in that, The utility model relates to a kind of 3D printing system, including: material adding system, pumping system, printing system and computer control system, the material adding system includes: level controller (4), storage bin (5) and speed and flow regulator (6), the level controller (4) is fixedly connected with storage bin (5) top, the top side of storage bin (5) is provided with feed inlet (1), spiral agitator A (2) is provided in storage bin (5), speed and flow regulator (6) are fixedly connected with storage bin (5) bottom, the material adding system is placed on support frame (3);The pumping system includes: peristaltic pump (8) and additional storage bin (9), peristaltic pump (8) is fixedly connected with additional storage bin (9), spiral agitator B (10) is provided in additional storage bin (9), the bottom of additional storage bin (9) is provided with discharge port (11), discharge port (11) is fixedly connected with printing system by connecting pipe, the pumping system is placed on operation bearing platform (12), and the pumping system is fixedly connected with material adding system by feed pipe (7);The printing system includes: base (14), support arm (15), mechanical arm (16), extrusion bin (17), spray head (19) and leveling spatula (20), the bottom of base (14) is provided with pulley (13), and the top of base (14) is provided with support arm (15), the support arm (15) is fixedly connected with one end of mechanical arm (16), the other end of mechanical arm (16) is fixedly connected with extrusion bin (17), and spiral extrusion structure (18) is provided in extrusion bin (17), and the lower portion of extrusion bin (17) is fixedly connected with spray head (19), and the outside of spray head (19) is fixedly connected with leveling spatula (20);The printing system is electrically connected or wirelessly connected with computer control system. The level controller (4) is a MCS-51 single-chip microcomputer cement level meter.

2. The concrete 3D printing experimental system according to claim 1, characterized in that, The pumping system is fixedly connected with extrusion bin (17) by feed pipe (7).

3. The concrete 3D printing experimental system according to claim 1, wherein, The computer control system includes: computer command system and automatic mechanical controller, the computer command system is electrically connected or wirelessly connected with automatic mechanical controller, and the automatic mechanical controller is connected with mechanical arm (16).

4. The concrete 3D printing experimental system according to claim 1, wherein, ​

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