Spraying device and method for cooperatively curing lunar loam based on microorganisms and magnesium oxide

Abstract

The invention discloses a spraying device and method based on microorganism-magnesium oxide synergistic solidification of lunar loam, belongs to the technical field of microorganism reinforcement, and solves the problem that a building of a lunar base is difficult to adapt to extremely high and low temperature and high radiation environments on the lunar surface. The device specifically comprises a monthly loam collecting mechanism, a connecting pipeline, a mixing mechanism and a spraying mechanism, the moon loam collecting mechanism is connected to one end of the connecting pipeline, and the other end of the connecting pipeline is connected with the mixing mechanism; and the discharging end of the mixing mechanism is connected with a spraying mechanism. According to the device, the moon loam collecting mechanism collects moon loam on the surface of the moon, the moon loam is conveyed to the material mixing mechanism through the connecting pipeline to be mixed into coating slurry, the spraying mechanism sprays the coating slurry to the surface of a moon base building, and the building is protected; mountain loam is used as a raw material of the building coating, the raw material can be obtained in situ, and the transportation cost is reduced; the lunar loam has the performance of resisting extreme temperature difference and high radiation, and can provide effective protection for lunar surface buildings.

Description

Technical Field

[0001] The present invention relates to the technical field of microbial reinforcement, and particularly relates to a spraying device and method for synergistically solidifying lunar soil by microorganisms - magnesium oxide. Background Art

[0002] Most of the particle sizes of lunar soil on the lunar surface are less than 1 mm and are in a loose state, and obviously cannot be directly used for lunar surface engineering construction. If relying on cement - based materials on the earth for lunar base construction, not only does it face huge challenges in material transportation, but also there is uncertainty about whether cement can maintain its original functions in the extreme environment on the moon (such as strong radiation, vacuum, extreme temperature differences, etc.). In - situ additive manufacturing methods using lunar soil as raw materials (such as extrusion / inkjet, calcination, stereolithography, etc.) have attracted the attention of researchers. These methods can significantly reduce the demand for transporting building materials from the earth, reduce costs, and at the same time, lunar soil can resist the extreme environment on the moon, enhancing the safety and durability of buildings. However, these methods have relatively complex processes and are difficult to implement.

[0003] The reinforcement technology based on microbial - induced calcium carbonate precipitation (MICP) is a conventional technology that can effectively reinforce rock and soil masses. And in the experimental study on the strength characteristics of microbial - reinforced simulated lunar soil published by Shi Jinquan, Fu Guiyong et al. in the Journal of Civil and Environmental Engineering, it shows that MICP can significantly improve the structure of simulated lunar soil, form a dense structure and provide a certain compressive strength. Therefore, the microbial reinforcement technology is considered a new solution for lunar construction. However, the traditional MICP grouting method still faces many challenges in lunar surface construction, such as cumbersome processes and great difficulty in raw material transportation; but research shows that lunar soil contains magnesium oxide, which provides a material basis for the application of the microbial - magnesium oxide synergistic reinforcement method on the lunar surface. In the extreme high and low temperatures and high - radiation environment on the lunar surface, it is difficult for buildings on the lunar base to adapt to this extreme environment; while lunar soil, as an in - situ material on the lunar surface, has strong environmental adaptability on the lunar surface and can play a good protective role in the protection of buildings. Therefore, the present application provides a spraying device and method for synergistically solidifying lunar soil by microorganisms - magnesium oxide. Summary of the Invention

[0004] Aiming at the deficiencies in the prior art, the present invention provides a spraying device and method for synergistically solidifying lunar soil by microorganisms - magnesium oxide, which solves the problem that buildings on the lunar base are difficult to adapt to the extreme high and low temperatures and high - radiation environment on the lunar surface.

[0005] In the first aspect, in order to achieve the above - mentioned purpose, the technical solution adopted by the present invention is as follows:

[0006] A spraying device for synergistically solidifying lunar soil based on microorganisms - magnesium oxide, comprising a lunar soil collection mechanism, a connecting pipeline, a mixing mechanism, and a spraying mechanism; the lunar soil collection mechanism is connected to one end of the connecting pipeline, and the other end of the connecting pipeline is connected to the mixing mechanism; the discharging end of the mixing mechanism is connected to the spraying mechanism.

[0007] In this solution, the lunar soil collection mechanism collects lunar soil on the lunar surface and transports it through the connecting pipeline to the mixing mechanism to be mixed into a coating slurry. The spraying mechanism sprays the coating slurry onto the surface of the lunar base building to protect the building; the original lunar soil on the lunar surface is utilized as the raw material for the building coating, and the raw material can be obtained in situ, which can significantly reduce the cost of transporting building materials from the Earth; the lunar soil itself has the performance of resisting extreme temperature differences and high radiation, which can provide effective protection for lunar surface buildings.

[0008] Further, the lunar soil collection mechanism includes a housing, and a material receiving cylinder is connected to the front end of the housing; a rotating roller is arranged inside the material receiving cylinder, and a plurality of sweeping blades are distributed around the outer side of the rotating roller; an opening is provided at the bottom of the material receiving cylinder, and a soil shoveling plate is arranged on one side of the opening; the soil shoveling plate is located at one end of a conveyor belt, and the other end of the conveyor belt is arranged in an aggregate chamber inside the housing; the bottom of the aggregate chamber has a funnel-shaped structure with higher sides and a lower middle, and a first rotating shaft is arranged in the middle of the funnel-shaped structure, and a first auger blade is wound and connected to the first rotating shaft; the discharging end of the first auger blade is provided with a first pipeline interface; the first pipeline interface is connected to the connecting pipeline;

[0009] A walking assembly is arranged at the bottom of the housing.

[0010] In this solution, during the rotation of the sweeping blades, the lunar soil on the lunar surface can be swept onto the conveyor belt, and the design of the soil shoveling plate also helps to guide the lunar soil onto the conveyor belt; the conveyor belt transports the lunar soil into the aggregate chamber, and the lunar soil falls in the middle of the aggregate chamber and is transported to the mixing mechanism by the first auger blade; this design can continuously collect lunar soil and only collect the lunar soil on the surface layer of the moon. After collection, the lunar surface is relatively flat and does not damage the lunar surface environment.

[0011] Further, the walking assembly includes four driving wheels; the four driving wheels are distributed in two pairs on both sides of the housing, and crawler belts are wound and connected to the two driving wheels on the same side of the housing.

[0012] In this solution, a crawler-type walking assembly is adopted, which is suitable for walking on the uneven lunar surface and ensures the stable walking of the lunar soil collection mechanism.

[0013] Further, the mixing mechanism includes a mixing tank. A raw material storage chamber is arranged at the top of the mixing tank, and the raw material storage chamber is connected to a connecting pipeline; a switching valve is arranged at the bottom of the raw material storage chamber; an inclined mixing chamber is opened at the bottom of the switching valve, a stirring motor is arranged on one side of the mixing chamber, a stirring shaft is connected to the output shaft of the stirring motor through a coupling, and a plurality of groups of stirring blades are arranged on the stirring shaft; a feeding chamber is opened at the bottom of the lower end of the mixing chamber, and the feeding chamber communicates with the mixing chamber; a feeding motor is arranged at one end of the feeding chamber, a second rotating shaft is connected to the output shaft of the feeding motor through a coupling, and a second auger blade is wound and connected to the second rotating shaft; a second pipeline interface is arranged at the discharging end of the second auger blade; the second pipeline interface is connected to the spraying mechanism through a pipeline.

[0014] In this solution, the bacterial liquid, activated magnesium oxide, and urea can all be stored in the raw material storage chamber at the top of the mixing chamber. Through the switching valve, they can fall into the mixing chamber and be mixed by the stirring blades; after mixing, the second auger blade provides power to transport it to the spraying mechanism; realizing the mixing and transportation of the coating slurry, with a simple structure and convenient operation.

[0015] Further, the inside of the raw material storage chamber is divided into three storage chambers by two parallel partitions. The three storage chambers are respectively a bacterial liquid storage chamber, an activated magnesium oxide and urea storage chamber, and a lunar soil storage chamber; the connecting pipeline is connected in the lunar soil storage chamber;

[0016] The switching valve includes three rotating plates, and the three rotating plates are respectively arranged in the blanking holes at the bottoms of the three storage chambers; the same sides of the three rotating plates are fixedly connected to the rotating rod; the end of the rotating rod penetrates through the mixing tank.

[0017] In this solution, rotating the rotating rod can drive the three rotating plates to rotate simultaneously to open the blanking holes, which is convenient to use.

[0018] Further, the connecting pipeline includes a plurality of connecting pipes, and the plurality of connecting pipes are sequentially connected through pipe joints; the two connecting pipes at both ends are respectively connected to the lunar soil collection mechanism and the mixing mechanism.

[0019] In this solution, the connecting pipes can be connected through pipe joints. By increasing or decreasing the number of connecting pipes, the overall length of the connecting pipeline can be lengthened or shortened, facilitating the adjustment of the distance between the lunar soil collection mechanism and the mixing mechanism, increasing the activity range of the lunar soil collection mechanism, so as to ensure that more lunar soil can be collected.

[0020] Further, the spraying mechanism is a nozzle, and the nozzle is connected to the mixing mechanism through a pipeline.

[0021] Second, based on the spraying device for synergistically solidifying lunar soil by microorganisms - magnesium oxide provided in the first aspect of the present invention, the present invention provides a spraying method for synergistically solidifying lunar soil by microorganisms - magnesium oxide, including the following steps:

[0022] S1: The lunar soil collection mechanism walks on the lunar surface, collects lunar soil during walking, and transports the lunar soil to the mixing mechanism through a connecting pipeline.

[0023] S2: Add urease bacteria solution, urea and reactive magnesium oxide into the mixing mechanism, mix evenly to obtain a coating slurry.

[0024] S3: Transport the coating slurry to the spraying mechanism for spraying.

[0025] In this solution, in-situ sampling, stirring and mixing, and grouting and spraying are carried out on the moon. The whole technological process is simple, the operation is simple, and it is easy to implement; and the coating slurry prepared based on lunar soil as raw material can resist the extreme environment on the lunar surface and can play a good role in protecting lunar surface buildings.

[0026] Further, S1 includes:

[0027] S101: The walking component drives the lunar soil collection mechanism to walk. During walking, the sweeping blades rotate to sweep the lunar soil onto the conveyor belt.

[0028] S102: The conveyor belt transports the lunar soil to the aggregate chamber.

[0029] S103: The first auger blade in the aggregate chamber transports the lunar soil to the lunar soil storage chamber.

[0030] In this solution,

[0031] Further, S2 includes:

[0032] S201: Select a urease bacteria solution with an OD600 of 1.2 or more and a urease activity greater than 12 mM urea / min and inject it into the bacteria solution storage chamber.

[0033] Then weigh urea and reactive magnesium oxide according to a mass ratio of 10:7 and put them into the reactive magnesium oxide and urea storage chambers.

[0034] S202: Rotate the rotating rod to drive the three rotating plates to rotate, so that the lunar soil, urease bacteria solution, urea and reactive magnesium oxide fall into the mixing chamber.

[0035] S203: The stirring blades inside the mixing chamber stir and mix the lunar soil, urease bacteria solution, urea and reactive magnesium oxide to obtain a coating slurry.

[0036] S204: The coating slurry flows into the feeding chamber under the action of gravity, and the second auger blade inside the feeding chamber transports the coating slurry to the spraying mechanism.

[0037] The beneficial effects of the present invention are:

[0038] The spraying device based on the synergistic solidification of lunar soil by microorganisms and magnesium oxide provided by the present invention combines the functions of lunar soil collection, mixing, and grouting and spraying. It can collect lunar soil, transport it to the mixing mechanism to be mixed into coating slurry, and spray the coating slurry onto the surface of lunar base buildings by the spraying mechanism to protect the buildings. The original lunar soil on the lunar surface is used as the raw material for building coatings, and the raw materials can be obtained in-situ, which can significantly reduce the cost of transporting building materials from the Earth. The lunar soil itself has the performance of resisting extreme temperature differences and high radiation, which can provide effective protection for lunar surface buildings.

[0039] The spraying method based on the synergistic solidification of lunar soil by microorganisms and magnesium oxide provided by the present invention adds urea as a reaction substrate and also adds active magnesium oxide to participate in the reaction to generate magnesium carbonate hydrate to achieve the reinforcement of lunar soil. Among them, the active magnesium oxide can be prepared from lunar soil as the raw material, and urea can be extracted from human urine, which can realize the in-situ preparation of raw materials and provide a material basis for lunar surface engineering. Description of the Drawings

[0040] Figure 1 It is a schematic structural diagram of the spraying device based on the synergistic solidification of lunar soil by microorganisms and magnesium oxide of the present invention;

[0041] Figure 2 It is a schematic internal structure diagram of the lunar soil collection mechanism in the present invention;

[0042] Figure 3 It is a schematic internal structure diagram of the lunar soil collection mechanism in the present invention from another perspective;

[0043] Figure 4 It is a schematic internal structure diagram of the mixing mechanism in the present invention;

[0044] Figure 5 It is a schematic internal structure diagram of the mixing mechanism in the present invention from another perspective.

[0045] Reference Signs:

[0046] 1. Lunar regolith collection mechanism; 11. Outer shell; 12. Material receiving cylinder; 13. Sweeping blade; 14. Earth shoveling plate; 15. Conveyor belt; 16. Aggregate chamber; 17. First auger blade; 18. First pipeline interface; 19. Traveling assembly; 191. Driving wheel; 192. Crawler; 2. Connecting pipeline; 21. Connecting pipe; 22. Pipe joint; 3. Mixing mechanism; 31. Mixing tank; 32. Raw material storage chamber; 321. Bacterial liquid storage chamber; 322. Active magnesium oxide and urea storage chamber; 323. Lunar regolith storage chamber; 33. Switch valve; 331. Rotating plate; 332. Rotating rod; 34. Stirring motor; 35. Stirring blade; 36. Mixing cavity; 37. Feeding motor; 38. Second auger blade; 39. Second pipeline interface; 40. Feeding cavity; 4. Spraying mechanism; 41. Nozzle Detailed implementation mode

[0047] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. The following describes the specific implementation mode of the present invention to facilitate those skilled in the art to understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific implementation mode. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are within the scope of protection.

[0048] Embodiment 1

[0049] As Figure 1 shown, this embodiment provides a spraying device for synergistic solidification of lunar regolith based on microorganisms - magnesium oxide. This spraying device integrates the functions of lunar regolith collection, mixing, and grouting spraying. It can collect lunar regolith and mix it into a coating slurry, and then spray it onto the lunar base building surface. Specifically, it includes:

[0050] Lunar regolith collection mechanism 1, connecting pipeline 2, mixing mechanism 3, and spraying mechanism 4;

[0051] Among them, the lunar regolith collection mechanism 1 is used to collect lunar regolith on the lunar surface; the lunar regolith collection mechanism 1 is connected to one end of the connecting pipeline 2, and the other end of the connecting pipeline 2 is connected to a mixing mechanism 3; the mixing mechanism 3 is used to mix the lunar regolith collected by the lunar regolith collection mechanism 1 into a coating slurry; the discharge end of the mixing mechanism 3 is connected to a spraying mechanism 4, and the spraying mechanism 4 is used to spray the coating slurry onto the surface of the lunar base building.

[0052] As Figure 2 and Figure 3As shown in the figure, the lunar soil collection mechanism 1 includes a housing 11, a material receiving cylinder 12, a rotating roller, a sweeping blade 13, a soil shoveling plate 14, a conveyor belt 15, an aggregate chamber 16, a first auger blade 17, and a first pipeline interface 18. The front end of the housing 11 is connected to the material receiving cylinder 12. A rotating roller is arranged inside the material receiving cylinder 12, and a number of sweeping blades 13 are distributed around the outside of the rotating roller. An opening is provided at the bottom of the material receiving cylinder 12, and a soil shoveling plate 14 is arranged on one side of the opening. The soil shoveling plate 14 is located at one end of the conveyor belt 15. During the rotation of the sweeping blade 13, the lunar soil on the lunar surface can be swept onto the conveyor belt 15. At the same time, the design of the soil shoveling plate 14 also helps to guide the lunar soil onto the conveyor belt 15. The other end of the conveyor belt 15 is arranged inside the aggregate chamber 16 of the housing 11. The bottom of the aggregate chamber 16 is in a funnel-shaped structure with higher sides and lower middle. A first rotating shaft is arranged in the middle of the funnel-shaped structure, and a first auger blade 17 is wound and connected to the first rotating shaft. The conveyor belt 15 transports the lunar soil into the aggregate chamber 16, and the lunar soil falls in the middle of the aggregate chamber 16 and is transported to the mixing mechanism 3 by the first auger blade 17. The discharge end of the first auger blade 17 is provided with a first pipeline interface 18. The first pipeline interface 18 is connected to the connecting pipeline 2.

[0053] A walking assembly 19 is arranged at the bottom of the housing 11.

[0054] The walking assembly 19 includes four driving wheels 191. The four driving wheels 191 are distributed in two on both sides of the housing 11. A crawler belt 192 is wound and connected to the two driving wheels 191 on the same side of the housing 11. The walking assembly 19 using the crawler belt 192 is suitable for walking on the uneven lunar surface, ensuring the stable walking of the lunar soil collection mechanism 1.

[0055] In this embodiment, the cavity inside the top of the housing 11 can be used to install a control circuit and a new energy battery.

[0056] As Figure 4 and Figure 5As shown in the figure, the mixing mechanism 3 includes a mixing tank 31, a switching valve 33, a stirring motor 34, stirring blades 35, a feeding motor 37, a second auger blade 38, and a second pipeline interface 39; a raw material storage chamber 32 is provided at the top of the mixing tank 31, and the raw material storage chamber 32 is connected to the connecting pipeline 2; a switching valve 33 is provided at the bottom of the raw material storage chamber 32; an inclined mixing chamber 36 is opened at the bottom of the switching valve 33, a stirring motor 34 is provided on one side of the mixing chamber 36, a stirring shaft is connected to the output shaft of the stirring motor 34 through a coupling, and a plurality of groups of stirring blades 35 are provided on the stirring shaft; a feeding chamber 40 is opened at the bottom of the mixing chamber 36 at the lower position, and the feeding chamber 40 communicates with the mixing chamber 36; a feeding motor 37 is provided at one end of the feeding chamber 40, a second rotating shaft is connected to the output shaft of the feeding motor 37 through a coupling, and a second auger blade 38 is wound and connected to the second rotating shaft; a second pipeline interface 39 is provided at the discharging end of the second auger blade 38; the second pipeline interface 39 is connected to the spraying mechanism 4 through a pipeline. The bacterial liquid, activated magnesium oxide, and urea can all be stored in the raw material storage chamber 32 at the top of the mixing chamber 36, and the three can be dropped into the mixing chamber 36 by the switching valve 33 and mixed by the stirring blades 35; after mixing, the second auger blade 38 provides power to transport it to the spraying mechanism 4; realizing the mixing and transportation of the coating slurry, with a simple structure and convenient operation.

[0057] The interior of the raw material storage chamber 32 is divided into three storage chambers by two parallel partitions. The three storage chambers are a bacterial liquid storage chamber 321, an activated magnesium oxide and urea storage chamber 322, and a lunar soil storage chamber 323; the connecting pipeline 2 is connected in the lunar soil storage chamber 323; a feed inlet is correspondingly provided at the top of each storage chamber.

[0058] The switching valve 33 includes three rotating plates 331, and the three rotating plates 331 are respectively arranged in the blanking holes at the bottoms of the three storage chambers; the same side of the three rotating plates 331 is fixedly connected to a rotating rod 332; the end of the rotating rod 332 penetrates through the mixing tank 31. Rotating the rotating rod 332 can drive the three rotating plates 331 to rotate simultaneously to open the blanking holes, which is convenient to use.

[0059] As a preference of this embodiment, a rubber ring is wrapped around the edges of the three rotating plates 331. The rubber ring can seal the gap between the rotating plates 331 and the blanking holes, ensuring the sealing inside the storage tank; avoiding the leakage of the bacterial solution.

[0060] The connecting pipeline 2 includes several connecting pipes 21 and pipe joints 22. The several connecting pipes 21 are sequentially connected through the pipe joints 22; the two connecting pipes 21 at both ends are respectively connected to the lunar soil collection mechanism 1 and the mixing mechanism 3. The connecting pipes 21 can be connected through the pipe joints 22. By increasing or decreasing the number of connecting pipes 21, the overall length of the connecting pipeline 2 can be lengthened or shortened, facilitating the adjustment of the distance between the lunar soil collection mechanism 1 and the mixing mechanism 3, increasing the movement range of the lunar soil collection mechanism 1, so as to ensure that more lunar soil can be collected.

[0061] In this embodiment, the connecting pipe 21 is made of a silica gel steel wire pipe, which has the characteristics of being resistant to high and low temperatures and radiation.

[0062] The spraying mechanism 4 is a spray head 41, and the spray head 41 is connected to the mixing mechanism 3 through a pipeline.

[0063] Embodiment 2

[0064] As Figures 1 - 5 shown, based on the spraying device for synergistically solidifying lunar soil by microorganisms - magnesium oxide provided in Embodiment 1, this embodiment provides a method for spraying and solidifying lunar soil by microorganisms - magnesium oxide, including the following steps:

[0065] S1: The lunar soil collection mechanism 1 walks on the lunar surface, collects lunar soil during walking and transports the lunar soil to the mixing mechanism 3 through the connecting pipeline 2; specifically including:

[0066] S101: The walking assembly 19 drives the lunar soil collection mechanism 1 to walk. During walking, the sweeping blades 13 rotate to sweep the lunar soil onto the conveyor belt 15;

[0067] S102: The conveyor belt 15 transports the lunar soil to the aggregate chamber 16;

[0068] S103: The first auger blade 17 in the aggregate chamber 16 transports the lunar soil to the lunar soil storage chamber 323.

[0069] S2: Add urease bacteria solution, urea and active magnesium oxide into the mixing mechanism 3, and mix evenly to obtain a coating slurry; specifically including:

[0070] S201: Select a urease bacteria solution with an OD600 of more than 1.2 and a urease activity greater than 12 mM urea / min and inject it into the bacteria solution storage chamber 321; among them, the reference ratio between the enzyme bacteria solution and the lunar soil is: add 200 ml of urease bacteria solution per kilogram of lunar soil; the urease bacteria are preferably Bacillus pasteurii;

[0071] Weigh urea and reactive magnesium oxide according to a mass ratio of 10:7 and place them in the storage chamber 322 for reactive magnesium oxide and urea. Among them, the amounts of urea and reactive magnesium oxide can be determined according to the amount of lunar soil collected. The reference mass ratio among lunar soil, reactive magnesium oxide and urea is 100:10:7.

[0072] S202: Rotate the rotating rod 332 to drive the three rotating plates 331 to rotate, so that lunar soil, urease bacteria solution, urea and reactive magnesium oxide fall into the mixing chamber 36.

[0073] S203: The stirring blades 35 inside the mixing chamber 36 stir and mix lunar soil, urease bacteria solution, urea and reactive magnesium oxide to obtain a coating slurry.

[0074] S204: The coating slurry flows into the feeding chamber 40 under the action of gravity, and the second auger blade 38 inside the feeding chamber 40 conveys the coating slurry to the spraying mechanism 4.

[0075] S3: Convey the coating slurry to the spraying mechanism 4 and spray it out.

[0076] Those of ordinary skill in the art will realize that the embodiments here are to help readers understand the principles of the present invention. It should be understood that the protection scope of the present invention is not limited to such specific statements and embodiments. Those of ordinary skill in the art can make various other specific deformations and combinations that do not deviate from the essence of the present invention according to the technical revelations disclosed in the present invention, and these deformations and combinations are still within the protection scope of the invention.

Claims

1. A spraying device for co-solidifying lunar soil based on microorganisms - magnesium oxide, characterized in that: It includes a lunar soil collection mechanism (1), a connecting pipeline (2), a mixing mechanism (3) and a spraying mechanism (4); one end of the connecting pipeline (2) is connected to the lunar soil collection mechanism (1), and the other end of the connecting pipeline (2) is connected to the mixing mechanism (3); the discharge end of the mixing mechanism (3) is connected to the spraying mechanism (4).

2. The spraying device for co-solidifying lunar soil based on microorganism-magnesium oxide according to claim 1, characterized in that: The lunar soil collection mechanism (1) includes a housing (11), and a material receiving cylinder (12) is connected to the front end of the housing (11); a rotating roller is arranged inside the material receiving cylinder (12), and a plurality of sweeping blades (13) are distributed around the outside of the rotating roller; an opening is provided at the bottom of the material receiving cylinder (12), and a soil shoveling plate (14) is arranged on one side of the opening; the soil shoveling plate (14) is located at one end of a conveyor belt (15), and the other end of the conveyor belt (15) is arranged in an aggregate chamber (16) inside the housing (11); the bottom of the aggregate chamber (16) is of a funnel-shaped structure with both sides high and the middle low, and a first rotating shaft is arranged in the middle of the funnel-shaped structure, and a first auger blade (17) is wound and connected to the first rotating shaft; the discharge end of the first auger blade (17) is provided with a first pipeline interface (18); the first pipeline interface (18) is connected to the connecting pipeline (2). A traveling assembly (19) is arranged at the bottom of the housing (11).

3. The spraying device for synergistically solidifying lunar soil based on microorganisms - magnesium oxide according to claim 2, wherein: The traveling assembly (19) includes four driving wheels (191); the four driving wheels (191) are distributed in two on both sides of the housing (11), and a crawler belt (192) is wound and connected to the two driving wheels (191) on the same side of the housing (11).

4. The spraying device for co-curing lunar soil based on microorganism-magnesium oxide according to claim 1, wherein: The mixing mechanism (3) includes a mixing box (31), a raw material storage chamber (32) is arranged at the top of the mixing box, and the raw material storage chamber (32) is connected to the connecting pipeline (2); a switching valve (33) is arranged at the bottom of the raw material storage chamber (32); an inclined mixing chamber (36) is opened at the bottom of the switching valve (33), a stirring motor (34) is arranged on one side of the mixing chamber (36), a stirring shaft is connected to the output shaft of the stirring motor (34) through a coupling, and a plurality of groups of stirring blades (35) are arranged on the stirring shaft; a feeding chamber (40) is opened at the bottom of the mixing chamber (36) at the lower end, and the feeding chamber (40) is communicated with the mixing chamber (36); a feeding motor (37) is arranged at one end of the feeding chamber (40), a second rotating shaft is connected to the output shaft of the feeding motor (37) through a coupling, and a second auger blade (38) is wound and connected to the second rotating shaft; the discharge end of the second auger blade (38) is provided with a second pipeline interface (39); the second pipeline interface (39) is connected to the spraying mechanism (4) through a pipeline.

5. The spraying device for co-curing lunar soil based on microorganism-magnesium oxide according to claim 4, characterized in that: The interior of the raw material storage chamber (32) is divided into three storage chambers by two parallel partitions. The three storage chambers are the bacterial liquid storage chamber (321), the active magnesium oxide and urea storage chamber (322), and the lunar soil storage chamber (323); the connecting pipeline (2) is connected inside the lunar soil storage chamber (323); The switching valve (33) includes three rotating plates (331), and the three rotating plates (331) are respectively arranged in the blanking holes at the bottoms of the three storage chambers; the same sides of the three rotating plates (331) are fixedly connected to the rotating rod (332); the end of the rotating rod (332) penetrates through the mixing box (31).

6. The spraying device for co-solidifying lunar soil based on microorganism-magnesium oxide according to claim 1, characterized in that: The connecting pipeline (2) includes a plurality of connecting pipes (21), and the plurality of connecting pipes (21) are sequentially connected through pipe joints (22); the two connecting pipes (21) at both ends are respectively connected to the lunar soil collection mechanism (1) and the mixing mechanism (3).

7. The spraying device for co-solidifying lunar soil based on microorganisms-magnesium oxide according to claim 1, characterized in that: The spraying mechanism (4) is a spray head (41), and the spray head is connected to the mixing mechanism (3) through a pipeline.

8. A method for a spraying device based on the synergistic solidification of lunar soil by microorganisms and magnesium oxide according to any one of claims 1 to 7, characterized in that, Including the following steps: S1: The lunar soil collection mechanism (1) walks on the lunar surface, collects lunar soil during walking, and transmits the lunar soil to the mixing mechanism (3) through the connecting pipeline; S2: Add urease bacteria solution, urea and active magnesium oxide into the mixing mechanism (3), mix evenly to obtain a coating slurry; S3: Transport the coating slurry to the spraying mechanism (4) for spraying.

9. The method of the spraying device based on the synergistic solidification of lunar soil by microorganisms and magnesium oxide according to claim 8, characterized in that, The S1 includes: S101: The walking component (19) drives the lunar soil collection mechanism (1) to walk. During walking, the sweeping blades (13) rotate to sweep the lunar soil onto the conveyor belt (15); S102: The conveyor belt (15) transports the lunar soil to the aggregate chamber (16); S103: The first auger blade (17) in the aggregate chamber (16) transports the lunar soil to the lunar soil storage chamber (323).

10. The method of the spraying device based on the co-solidification of lunar soil by microorganisms and magnesium oxide according to claim 9, characterized in that, The S2 includes: S201: Select a urease bacteria solution with an OD600 of more than 1.2 and a urease activity greater than 12 mM urea / min and inject it into the bacterial liquid storage chamber (321); Then weigh urea and active magnesium oxide according to a mass ratio of 10:7 and put them into the active magnesium oxide and urea storage chamber (322); S202: Rotate the rotating rod (332) to drive the three rotating plates (331) to rotate, so that the lunar soil, urease bacteria solution, urea and active magnesium oxide fall into the mixing cavity (36); S203: The stirring blades (35) inside the mixing cavity (36) stir and mix the lunar soil, urease bacteria solution, urea and active magnesium oxide to obtain a coating slurry; S204: The coating slurry flows into the feeding cavity (40) under the action of gravity, and the second auger blade (38) inside the feeding cavity (40) transports the coating slurry to the spraying mechanism (4).

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