3D building printer capable of being used for lunar soil printing

Abstract

The 3D building printer comprises a lunar soil printer main body, the output end of a mechanical arm at the front end of the main body is connected with a mounting shell, a drum-type spray head is rotationally connected in the mounting shell, an embedding opening and a discharging opening are formed in the outer wall of the spray head at equal intervals, and a plugging assembly is installed in the embedding opening; the device comprises an embedding plate and a plugging block which are rotationally connected with a spray head, an opening and closing control assembly at the end of the drum-type spray head comprises a fixing ring, an opening and a pushing inclined block, the end of the embedding plate is inserted into the fixing ring, and the plugging block can be opened when the end of the embedding plate moves to the opening, and the drum-type spray head and the plugging assembly are intermittently matched, so that strip-shaped materials are extruded at equal intervals, and the extrusion amount is controlled; the reserved gap is combined with the nozzle rolling extrusion and the side baffle to guide the materials to flow directionally and prevent collapse; meanwhile, an interlayer concave-convex structure and mechanical occlusion are formed through intermittent strip-shaped extrusion and rolling extrusion, the interlayer connecting force is enhanced, material fusion is promoted through extrusion, and the strength and stability of the lunar soil brick are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D building printing, and particularly to a 3D building printer applicable to lunar soil printing. Background Art

[0002] Lunar soil is mainly composed of basalt debris, vitreous particles, etc. A 3D printer for lunar soil can, through special technologies, in a manner similar to the layer-by-layer stacking of ordinary 3D printing, precisely control the extrusion, spraying or laying path of materials according to a preset building model to realize the construction of three-dimensional objects and print building components of different specifications, such as "lunar soil bricks", etc.

[0003] In Chinese Patent No. 202010120069.3, the invention discloses a 3D printing device for lunar soil resources in lunar craters, including: a traveling device, a lunar soil mining device installed on the traveling frame for mining lunar soil; a soil crusher installed on the traveling frame, after the lunar soil mining device mines lunar soil, the lunar soil is transported to the soil crusher, and the soil crusher conducts material processing; a 3D printing execution unit; a Fresnel lens fixedly installed above the 3D printing execution unit, the Fresnel lens focuses on the printing platform; a first reflector fixedly installed outside the traveling device and a second reflector fixedly installed on the traveling frame or the 3D printing execution unit. This 3D printing device can be used in lunar craters on the moon to perform 3D printing operations using existing resources on the moon, realizing in-situ resource utilization, and thus solving the problems of the cost and cycle of manufacturing and transporting materials required for building a permanent base from the earth.

[0004] In existing 3D printers for lunar soil, the materials extruded by their nozzles usually build lunar soil bricks through a layer-by-layer stacking method. However, the molten lunar soil material has the characteristic of high fluidity. If a simple paving method is used to build lunar soil bricks, the highly fluid lunar soil material is likely to flow and collapse towards the sides, affecting its final shape; the molten lunar soil material has poor viscosity, and in the unique low-temperature environment on the moon, the solidification speed is relatively fast, which easily leads to poor adhesion between the layers of materials laid together, affecting the overall stability of the lunar soil bricks. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the defects in the prior art that the molten lunar soil material with high fluidity is prone to flow and collapse towards the sides during the printing process, and its viscosity is insufficient, and the connection between the layers of materials is not tight enough. The present invention proposes a 3D building printer applicable to lunar soil printing.

[0006] To solve the above technical problems, the technical solution adopted by the present invention includes a lunar soil printer main body, a robotic arm is installed at the front end of the lunar soil printer main body, an output end of the robotic arm is fixedly connected with a mounting shell, a drum-type nozzle is rotatably connected inside the mounting shell, a plurality of fitting ports and discharging ports are equidistantly arranged on an outer wall of the drum-type nozzle, the fitting ports and the discharging ports correspond to each other one by one, a plugging component is installed inside the fitting port, the plugging component includes a fitting plate, the fitting plate is rotatably connected with the drum-type nozzle, the fitting plate is adapted to the fitting port, and a plugging block is fixedly connected to an inner wall of the fitting plate.

[0007] Preferably, two groups of opening and closing control components are symmetrically arranged at an end of the drum-type nozzle, the opening and closing control components include a fixing ring, and the fixing ring is fixedly connected to an inner wall of the mounting shell, the fixing ring sleeves the end of the drum-type nozzle, and the drum-type nozzle is rotatably connected with the fixing ring, an opening is arranged at a side of the fixing ring, a pushing inclined block is arranged at a bottom end of the opening, and the pushing inclined block is fixedly connected with the fixing ring, two groups of side baffles are symmetrically arranged at a bottom of the drum-type nozzle, and the side baffles are fixedly connected with the fixing ring.

[0008] Preferably, an end of the fitting plate is inserted into the fixing ring, and the fitting plate moving to the opening can drive the plugging block to rotate outwards and open together.

[0009] Preferably, the discharging port is communicated with an inner cavity of the drum-type nozzle, four side edges of the discharging port are all arranged as inclined surface structures gradually expanding from inside to outside, an inclined side surface is arranged at a side of the plugging block, and the inclined side surface is adapted to the four side edges of the discharging port.

[0010] Preferably, an extrusion sheet is fixedly connected to a side of the inclined side surface far away from the fitting plate, and the extrusion sheets correspond to the inclined side surfaces one by one.

[0011] Preferably, an extrusion block is fixedly connected to an outer wall of the drum-type nozzle, and the extrusion block and the fitting port are arranged at an interval.

[0012] Preferably, a scraping component is arranged at a back of the drum-type nozzle, the scraping component includes a scraping plate, and the scraping plate is fixedly connected with the fixing ring.

[0013] Preferably, a scraping opening is arranged inside the scraping plate, and the extrusion block can pass through the scraping opening.

[0014] Preferably, a telescopic scraping block is slidably connected inside the scraping opening, a spring is arranged inside the telescopic scraping block, one end of the spring is fixedly connected with the telescopic scraping block, and the other end of the spring is fixedly connected with the scraping plate.

[0015] Preferably, a scraping bevel block is fixedly connected to one side of the telescopic scraping block close to the extrusion block, and the scraping bevel block is used to scrape off the lunar soil material adhered to the extrusion block.

[0016] Preferably, a transmission assembly is installed on the side of the mounting shell, and the transmission assembly includes a motor, and the motor is fixedly connected to the inner wall of the mounting shell, the output end of the motor is fixedly connected to a driving gear, and the bottom of the driving gear is meshed with a driven gear, and the inner wall of the driven gear is fixedly connected to a rotating shaft, the rotating shaft passes through the mounting shell, and the end of the rotating shaft is fixedly connected to the drum-type sprinkler.

[0017] Preferably, a material storage tank is fixedly connected to the top of the lunar soil printer body, a material conveying pipe is fixedly connected to the side of the material storage tank, and the output end of the material conveying pipe is connected to the drum-type nozzle.

[0018] Compared with the prior art, the beneficial effects of the present invention include: The present invention realizes the extrusion of materials in strips with equal spacing through the intermittent cooperation of the drum nozzle and the plugging component. Compared with the traditional flat continuous extrusion, the amount of extruded materials each time is controllable, avoiding the risk of excessive accumulation and collapse caused by the high fluidity of the lunar soil. At the same time, the reserved gap provides flow space for the material, combined with the rolling extrusion of the drum nozzle and the restriction of the scraping component, guides the material to flow in a directional manner, prevents the deformation of flowing to the side, and ensures the stable formation of the printed structure. The intermittent strip extrusion of the material cooperates with the rolling extrusion of the nozzle to create more interlayer contact edges and concave-convex structures, so that a new layer of material can be embedded in the gap of the lower layer to form a mechanical bite effect. Compared with the simple flat stacking, the interlayer connection force is greatly increased. At the same time, the pressure generated by the rolling extrusion promotes the close contact of the material particles, reduces the molecular distance, enhances the intermolecular force, and promotes the new material to penetrate into the lower layer pores to achieve deep fusion, make up for the defect of poor adhesion of the lunar soil, and significantly improve the overall strength and stability of the lunar soil brick. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The disclosure of the present invention is described with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of the present invention. In the accompanying drawings, the same reference numerals are used to refer to the same components. Among them: Figure 1 A schematic diagram of a side view of a 3D architectural printer that can be used for lunar soil printing according to one embodiment of the present invention is shown; Figure 2 A schematic diagram of the structure of a rear view of a 3D architectural printer that can be used for lunar soil printing according to one embodiment of the present invention is shown; Figure 3Schematically shows a front view structural schematic diagram of a print head part of a 3D construction printer that can be used for lunar soil printing according to an embodiment of the present invention; Figure 4 Schematically shows a rear view structural schematic diagram of a print head part of a 3D construction printer that can be used for lunar soil printing according to an embodiment of the present invention; Figure 5 Schematically shows a cross-sectional structural schematic diagram of a drum-type print head part of a 3D construction printer that can be used for lunar soil printing according to an embodiment of the present invention; Figure 6 Schematically shows a structural schematic diagram of a opening and closing control component part of a 3D construction printer that can be used for lunar soil printing according to an embodiment of the present invention; Figure 7 Schematically shows a structural schematic diagram of a plugging component part of a 3D construction printer that can be used for lunar soil printing according to an embodiment of the present invention; Figure 8 Schematically shows a cross-sectional structural schematic diagram of a scraping component part of a 3D construction printer that can be used for lunar soil printing according to an embodiment of the present invention; Figure 9 Schematically shows a structural schematic diagram of a transmission component part of a 3D construction printer that can be used for lunar soil printing according to an embodiment of the present invention.

[0020] In the figure: 1, lunar soil printer main body; 2, robotic arm; 3, mounting shell; 4, drum-type print head; 5, fitting opening; 6, plugging component; 7, opening and closing control component; 8, scraping component; 9, transmission component; 10, discharge port; 11, extrusion block; 12, side baffle; 13, material storage tank; 14, material delivery pipe; 601, fitting plate; 602, plugging block; 603, inclined side; 604, extrusion sheet; 701, fixing ring; 702, opening; 703, pushing inclined block; 801, scraper; 802, scraping opening; 803, telescopic scraping block; 804, spring; 805, scraping inclined block; 901, motor; 902, driving gear; 903, driven gear; 904, rotating shaft. Detailed implementation manners

[0021] It is easy to understand that according to the technical solution of the present invention, without changing the essence of the present invention, those of ordinary skill in the art can propose various structural forms and implementation manners that can be mutually replaced. Therefore, the following detailed implementation manners and the accompanying drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as all of the present invention or as a limitation or restriction on the technical solution of the present invention.

[0022] According to an embodiment of the present invention in combination with Figures 1 to 9Shown. A 3D construction printer that can be used for lunar soil printing, including a lunar soil printer main body 1. A robotic arm 2 is installed at the front end of the lunar soil printer main body 1. An output end of the robotic arm 2 is fixedly connected to an installation shell 3. A material storage tank 13 is fixedly connected to the top of the lunar soil printer main body 1. A material conveying pipe 14 is fixedly connected to a side of the material storage tank 13. An output end of the material conveying pipe 14 is communicated with a drum-type nozzle 4.

[0023] Lunar soil is mainly composed of various mineral particles, vitreous substances, etc. In a molten state, its components are relatively uniform, and components such as vitreous substances will reduce the viscosity of the material at high temperatures, increasing its fluidity. Compared with ordinary concrete building printing materials mixed with multiple materials such as cement, sand, and water, it has higher fluidity. When printing lunar soil bricks, too high fluidity may cause the printed lunar soil material to easily flow to the side and deform or collapse. To solve this problem, the present invention has made the following improvements at the nozzle position of the 3D construction printer: A drum-type nozzle 4 is rotatably connected inside the installation shell 3. The outer wall of the drum-type nozzle 4 is equidistantly provided with fitting ports 5 and discharge ports 10. The fitting ports 5 and the discharge ports 10 correspond one by one. A plugging component 6 is installed inside the fitting port 5. The plugging component 6 includes a fitting plate 601. The fitting plate 601 is rotatably connected to the drum-type nozzle 4. The fitting plate 601 is adapted to the fitting port 5. A plugging block 602 is fixedly connected to the inner wall of the fitting plate 601. Two groups of opening and closing control components 7 are symmetrically arranged at the end of the drum-type nozzle 4. The opening and closing control component 7 includes a fixing ring 701, and the fixing ring 701 is fixedly connected to the inner wall of the installation shell 3. The fixing ring 701 is sleeved on the end of the drum-type nozzle 4, and the drum-type nozzle 4 is rotatably connected to the fixing ring 701. An opening 702 is provided on the side of the fixing ring 701. A pushing inclined block 703 is arranged at the bottom of the opening 702, and the pushing inclined block 703 is fixedly connected to the fixing ring 701. Two groups of side baffles 12 are symmetrically arranged at the bottom of the drum-type nozzle 4, and the side baffles 12 are fixedly connected to the fixing ring 701. The end of the fitting plate 601 is inserted into the fixing ring 701. The fitting plate 601 moving to the opening 702 can drive the plugging block 602 to rotate outwards and open together.

[0024] The molten lunar soil material inside the material storage tank 13 is conveyed into the inner cavity of the drum-type nozzle 4 through the material conveying pipe 14. The drum-type nozzle 4 rotates together with the plugging assembly 6. The fitting plate 601 in the plugging assembly 6 that is not aligned with the opening 702 cannot rotate outwards and open under the restriction of the fixed ring 701. The fitting plate 601 is stuck inside the fitting opening 5. At the same time, the plugging block 602 is inserted into the inner part of the discharge port 10 to plug the discharge port 10, so that the material inside the drum-type nozzle 4 cannot be extruded outwards through these discharge ports 10. When rotating, there will be intermittent plugging assemblies 6 aligned with the opening 702. At this time, after the two ends of the fitting plate 601 lose the restriction of the fixed ring 701, they will rotate outwards and open under the pressure of the material inside the drum-type nozzle 4, and at the same time, the plugging block 602 will be opened together. At this time, the discharge port 10 is in an open state, and the material inside the drum-type nozzle 4 can be extruded outwards through the discharge port 10.

[0025] Since the discharge port 10 and the plugging assembly 6 are arranged at equal intervals with respect to the outer wall of the drum-type nozzle 4, when the drum-type nozzle 4 is rotating, there will be intermittent plugging assemblies 6 aligned with the discharge port 10 at the opening 702. The material inside the drum-type nozzle 4 will be extruded outwards intermittently. The extruded material is distributed in a strip shape at equal intervals on a plane. While the drum-type nozzle 4 is rotating and advancing forward, the bottom end of the drum-type nozzle 4 will exert a squeezing effect on the material strip extruded from the discharge port 10. While squeezing, the lunar soil material is spread out. At the same time, the scraping assembly 8 blocks on both sides of the material, so that the material cannot flow to both sides and can only flow into the gaps between the strip-shaped materials. The traditional flat extrusion of materials is continuous. For the lunar soil material with large fluidity, it is easy to form excessive accumulation during the extrusion process, resulting in local overweight and collapse. However, the intermittent laying method of the present invention makes the materials distributed in a strip shape at equal intervals. The amount of material extruded each time is relatively small, and there are gaps reserved for the material to flow between the materials, which will not cause local large accumulation and reduce the risk of collapse caused by its own weight.

[0026] The molten lunar soil material has poor adhesiveness. During the traditional flat printing process, when a new layer of material is laid on the surface of the upper layer of material that has solidified or is close to solidifying, it is difficult to form good adhesion between the two. Only by simple flat stacking, the combination between layers is relatively loose, which may affect the overall stability and strength of the printed lunar soil bricks.

[0027] The present invention first extrude the material outward in strips through the discharge port 10, and under the rolling and pushing action of the drum-type nozzle 4, not only the material is arranged in an intermittent manner, but the rolling drum-type nozzle 4 also generates a downward extrusion force on the lunar soil material when passing over the material. At the same time, an extrusion block 11 spaced apart from the fitting port 5 is fixedly connected to the outer wall of the drum-type nozzle 4. The intermittent arrangement of the material interacts with the extrusion shaping of the extrusion block 11. Compared with the flat extrusion, this method allows each layer of material to have more contact edges and concave-convex structures. When a new layer of material falls on the concave-convex structure of the previous layer of material, it can be embedded in the gap of the lower layer of material to form a similar The mechanical bite effect of the puzzle increases the connection force between layers and improves the overall stability. At the same time, the rolling drum nozzle 4 produces a downward extrusion force on the lunar soil material. This pressure makes the newly extruded material contact more closely with the solidified or nearly solidified material in the lower layer. On the one hand, the extrusion pressure reduces the distance between the material particles, increases the intermolecular force, and helps bonding. On the other hand, the extrusion pressure can make the new material squeeze into the surface pores of the lower material to a certain extent, promote the fusion of the two layers of material, make up for the poor adhesion of the lunar soil material, improve the bonding strength between layers, and thus improve the overall strength of the printed lunar soil bricks.

[0028] When the inclined side surface 603 is closed and embedded in the discharge port 10, the material remaining at the discharge port 10 may affect the normal closing of the inclined side surface 603, and the remaining material may affect the next opening of the inclined side surface 603 after being fastened between the inclined side surface 603 and the discharge port 10. In order to solve this problem, the present invention has made the following improvements: The discharge port 10 is connected to the inner cavity of the drum-type nozzle 4, and the four sides of the discharge port 10 are all arranged as inclined surface structures that gradually expand from the inside to the outside. The side of the blocking block 602 is provided with an inclined side surface 603, and the inclined side surface 603 is adapted to the four sides of the discharge port 10. The side of the inclined side surface 603 away from the mosaic plate 601 is fixedly connected with an extrusion sheet 604, and the extrusion sheet 604 corresponds to the inclined side surface 603 one by one. When the mosaic plate 601 rotates with the blocking block 602 to close When embedded in the interior of the closed discharge port 10, the side of the extrusion sheet 604 will first contact the side of the discharge port 10, and while moving inward, form a gap with an opening facing inward with the side of the discharge port 10. As the inclined side surface 603 gradually enters the interior of the discharge port 10, this gap is gradually squeezed and shrunk, and the material inside it is squeezed inward into the interior of the drum-type nozzle 4, preventing the material from remaining between the inclined side surface 603 and the discharge port 10 and affecting the opening and closing of the inclined side surface 603.

[0029] During the process that the drum - type nozzle 4 rolls while extruding the material below, some unfrozen lunar soil materials may adhere to the outer surfaces of the drum - type nozzle 4 and the fitting plate 601. In order to scrape off these adhered materials, the present invention makes the following settings: A scraping component 8 is arranged on the back of the drum - type nozzle 4. The scraping component 8 includes a scraping plate 801, and the scraping plate 801 is fixedly connected to the fixed ring 701. A scraping opening 802 is formed inside the scraping plate 801. The extrusion block 11 can pass through the scraping opening 802. A telescopic scraping block 803 is slidably connected inside the scraping opening 802. A spring 804 is arranged inside the telescopic scraping block 803. One end of the spring 804 is fixedly connected to the telescopic scraping block 803, and the other end of the spring 804 is fixedly connected to the scraping plate 801. A scraping inclined block 805 is fixedly connected to the side of the telescopic scraping block 803 close to the extrusion block 11. The scraping inclined block 805 is used to scrape off the lunar soil materials adhered to the extrusion block 11.

[0030] The scraping plate 801 is used to scrape off the materials adhered to the outer surfaces of the drum - type nozzle 4 and the fitting plate 601. When the extrusion block 11 rotates to the position of the scraping component 8, it will push the telescopic scraping block 803 outward along the inclined surface of the scraping inclined block 805. At the same time, the scraping inclined block 805 scrapes off the materials adhered to the extrusion block 11. At this time, the spring 804 is in a compressed state. After the extrusion block 11 rotates past, under the action of the spring 804, the scraping inclined block 805 returns to the position flush with the scraping plate 801 again to clean the drum - type nozzle 4 and the fitting plate 601.

[0031] A transmission component 9 is installed on the side of the installation shell 3. The transmission component 9 includes a motor 901, and the motor 901 is fixedly connected to the inner wall of the installation shell 3. The output end of the motor 901 is fixedly connected to a driving gear 902. A driven gear 903 meshes with the bottom of the driving gear 902. A rotating shaft 904 is fixedly connected to the inner wall of the driven gear 903. The rotating shaft 904 penetrates the installation shell 3, and the end of the rotating shaft 904 is fixedly connected to the drum - type nozzle 4. The output end of the motor 901 drives the driving gear 902 to rotate, and at the same time drives the drum - type nozzle 4 to rotate through the driven gear 903 and the rotating shaft 904, so that the drum - type nozzle 4 is in a state of rolling forward.

[0032] The technical scope of the present invention is not limited to the content described above. Those skilled in the art can make various deformations and modifications to the above - mentioned embodiments without departing from the technical idea of the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. A 3D construction printer that can be used for lunar soil printing, characterized in that, It includes a lunar soil printer main body, a robotic arm is installed at the front end of the lunar soil printer main body, the output end of the robotic arm is fixedly connected with an installation shell, a drum-type nozzle is rotatably connected inside the installation shell, a plurality of fitting ports and discharge ports are equidistantly arranged on the outer wall of the drum-type nozzle, the fitting ports and the discharge ports correspond one by one, a plugging component is installed inside the fitting port, the plugging component includes a fitting plate, the fitting plate is rotatably connected with the drum-type nozzle, the fitting plate is adapted to the fitting port, and a plugging block is fixedly connected to the inner wall of the fitting plate; Two groups of opening and closing control components are symmetrically arranged at the end of the drum-type nozzle, the opening and closing control components include a fixed ring, and the fixed ring is fixedly connected to the inner wall of the installation shell, the fixed ring sleeves the end of the drum-type nozzle, and the drum-type nozzle is rotatably connected with the fixed ring, an opening is arranged on the side of the fixed ring, a pushing inclined block is arranged at the bottom of the opening, and the pushing inclined block is fixedly connected with the fixed ring, two groups of side baffles are symmetrically arranged at the bottom of the drum-type nozzle, and the side baffles are fixedly connected with the fixed ring; The end of the fitting plate is inserted into the fixed ring, and the fitting plate moving to the opening can rotate outward together with the plugging block to open.

2. The 3D construction printer applicable to lunar soil printing according to claim 1, characterized in that, The discharge port is communicated with the inner cavity of the drum-type nozzle, the four side edges of the discharge port are all arranged as inclined surface structures that gradually expand from the inside to the outside, an inclined side surface is arranged on the side of the plugging block, and the inclined side surface is adapted to the four side edges of the discharge port.

3. The 3D construction printer applicable to lunar soil printing according to claim 2, characterized in that, An extrusion sheet is fixedly connected to the side of the inclined side surface away from the fitting plate, and the extrusion sheets correspond to the inclined side surfaces one by one.

4. The 3D construction printer applicable to lunar soil printing according to claim 1, characterized in that, An extrusion block is fixedly connected to the outer wall of the drum-type nozzle, and the extrusion block is arranged at an interval from the fitting port.

5. The 3D construction printer applicable to lunar soil printing according to claim 4, characterized in that, A scraping component is arranged on the back of the drum-type nozzle, the scraping component includes a scraping plate, and the scraping plate is fixedly connected with the fixed ring.

6. The 3D construction printer applicable to lunar soil printing according to claim 5, characterized in that, A scraping opening is arranged inside the scraping plate, and the extrusion block can pass through the scraping opening.

7. The 3D construction printer applicable to lunar soil printing according to claim 6, characterized in that, A telescopic scraping block is slidably connected inside the scraping opening, a spring is arranged inside the telescopic scraping block, one end of the spring is fixedly connected with the telescopic scraping block, and the other end of the spring is fixedly connected with the scraping plate.

8. The 3D construction printer applicable to lunar soil printing according to claim 7, wherein, A scraping inclined block is fixedly connected to the side of the telescopic scraping block close to the extrusion block, and the scraping inclined block is used for scraping the lunar soil material adhered to the extrusion block.

9. The 3D construction printer applicable to lunar soil printing according to claim 1, characterized in that, A transmission component is installed on the side of the installation shell, the transmission component includes a motor, and the motor is fixedly connected to the inner wall of the installation shell, the output end of the motor is fixedly connected with a driving gear, and a driven gear is engaged with the bottom of the driving gear, a rotating shaft is fixedly connected to the inner wall of the driven gear, the rotating shaft penetrates the installation shell, and the end of the rotating shaft is fixedly connected with the drum-type nozzle.

10. The 3D construction printer applicable to lunar soil printing according to claim 1, characterized in that, A material storage tank is fixedly connected to the top of the lunar soil printer main body, a material conveying pipe is fixedly connected to the side of the material storage tank, and the output end of the material conveying pipe is communicated with the drum-type nozzle.

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