A composite device for the preparation and transfer of a water-containing simulated lunar soil by vacuum drying and water molecule vapor deposition

Abstract

The present invention provides a composite device for the preparation and transfer of water-containing simulated lunar soil by vacuum drying water molecule vapor deposition, belonging to the field of space exploration. It solves the problem that the interference of impurity gas factors cannot be excluded in the traditional lunar soil preparation process. It includes a data acquisition system, a vacuum system, a vacuum gauge, a vacuum baffle valve, a four-way connector, a lunar soil test tube assembly, a titration assembly, a heat preservation assembly, a heating assembly, a glove box, an inlet valve, an outlet valve, a transfer composite assembly, and a flange test tube with an angle valve. The inlet valve and the outlet valve are arranged on the wall surface of the glove box. The titration assembly, the heat preservation assembly, and the transfer composite assembly are all arranged inside the glove box. The heat preservation assembly is used to contain the refrigerant. The data acquisition system is electrically connected to the vacuum gauge. The data acquisition system is used to collect the humidity, temperature, gas composition of the glove box, and the vacuum degree data inside the four-way connector and display them. The transfer composite assembly is used to transfer the lunar soil test tube assembly after the simulated lunar soil is prepared. It is mainly used for the preparation of simulated lunar soil.

Description

Technical Field

[0001] The invention belongs to the field of space exploration, and particularly relates to a composite device for preparing and transferring a water-containing simulated lunar soil by vacuum drying water molecule gas-phase deposition. Background Art

[0002] With the further research of domestic and foreign scholars and experts on the ground-simulated lunar soil, the current preparation methods of water-containing simulated lunar soil are mainly divided into three types: water-mixed soil, ice-mixed soil, and steam condensation ice. The first two simulation methods are relatively mature, while the preparation method of steam condensation ice is not yet mature at this stage and cannot fully simulate various extreme working conditions of real lunar soil. Therefore, the method for realizing the preparation of samples that can simulate various extreme and harsh environments of real lunar soil has become the research focus of steam condensation ice simulated lunar soil.

[0003] The current preparation method of steam condensation ice simulated lunar soil uses the simulated lunar soil dried in an oven, which is filled in an aluminum box. After pre-cooling, in a cold environment, an ultra-pure water is adsorbed on the surface of the simulated lunar soil in the form of water vapor by using a humidifier or a simple water vapor generator. However, this method has the problem that when water vapor is generated, the water vapor in the cold environment is adsorbed by the simulated lunar soil particles, which affects the accuracy of the corresponding moisture content, and the interference of water vapor in the air cannot be excluded. Moreover, the vacuum environment formed by real lunar soil is not simulated, resulting in a certain deviation in the study of real lunar soil. Summary of the Invention

[0004] In view of this, the present invention aims to propose a patent to solve the problem that the interference of impurity gas factors cannot be excluded in the traditional lunar soil preparation process.

[0005] To achieve the above object, the present invention adopts the following technical solutions: A composite device for the preparation and transfer of a vacuum-dried water molecule vapor deposition water-containing simulated lunar soil, comprising a data acquisition system, a vacuum system, a vacuum gauge, a vacuum baffle valve, a four-way connector, a lunar soil test tube assembly, a titration assembly, a heat preservation assembly, a heating assembly, a glove box, an inlet valve, an outlet valve, a transfer composite assembly and a flange test tube with a corner valve. The four-way connector is arranged inside the glove box. The four-way connector has three open ends and one closed end. Vacuum baffle valves are arranged on the corresponding pipelines of the three open ends. The first open end of the four-way connector is communicated with the lunar soil test tube assembly, and a heating assembly is arranged below the lunar soil test tube assembly. The second open end of the four-way connector is communicated with the flange test tube with a corner valve. The third open end of the four-way connector is communicated with the negative pressure open end of the vacuum system. The vacuum gauge is arranged inside the closed end of the four-way connector. The inlet valve and the outlet valve are arranged on the wall surface of the glove box. The titration assembly, the heat preservation assembly and the transfer composite assembly are all arranged inside the glove box. The titration assembly is used to titrate a corresponding amount of water into the flange test tube with a corner valve according to the target water content of the lunar soil in the lunar soil test tube assembly. The heat preservation assembly is used to contain a refrigerant. The data acquisition system is electrically connected to the vacuum gauge. The data acquisition system is used to collect and display the humidity, temperature, gas composition inside the glove box and the vacuum degree data inside the four-way connector. The transfer composite assembly is used to transfer the lunar soil test tube assembly after the simulated lunar soil is prepared.

[0006] Furthermore, the data acquisition system includes a computer, a humidity sensor, a temperature sensor, a gas detector and a controller. The humidity sensor, the temperature sensor and the vacuum gauge are all electrically connected to the controller. The controller is electrically connected to the computer. The humidity sensor is used to detect the humidity inside the glove box. There are two temperature sensors. The two temperature sensors are respectively used to detect the temperatures of the lunar soil test tube and the flange test tube with a corner valve. The gas detector is used to detect the gas composition inside the glove box.

[0007] Furthermore, the vacuum system includes a vacuum pump and an air extraction pipe. The vacuum pump is communicated with the third open end of the four-way connector through the air extraction pipe.

[0008] Furthermore, the transfer composite assembly includes a heat preservation box, a liquid nitrogen bucket and a liquid nitrogen bucket cover. The liquid nitrogen bucket is arranged inside the heat preservation box. The liquid nitrogen bucket cover is arranged at the upper end of the liquid nitrogen bucket.

[0009] Furthermore, the four-way connector is connected to a support frame. The base of the support frame is fixed on the bottom plate of the glove box.

[0010] Furthermore, the heat preservation assembly is a heat preservation cup.

[0011] Furthermore, the lunar soil test tube assembly includes a lunar soil test tube and a corner valve. The lunar soil test tube is connected to the corner valve. The corner valve is communicated with the first open end of the four-way connector.

[0012] Further, the heating component is an alcohol blowtorch.

[0013] Further, the inlet valve and the outlet valve are arranged on the left and right side end faces of the glove box. The inlet valve is arranged at a lower position on the corresponding side end face and is externally connected to a low-temperature nitrogen gas pipeline at -50°C, and the outlet valve is arranged at a higher position on the corresponding side end face.

[0014] Further, the titration component is a pipette.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. According to the preparation quality and water content of the simulated lunar soil, titrate the corresponding amount of water into the test tube with a corner valve flange through a pipette to improve the preparation accuracy of the water content of the simulated lunar soil;

[0017] 2. Heat the lunar soil test tube through the heating component and simultaneously evacuate the lunar soil test tube with a vacuum pump, so as to absolutely dry the lunar soil raw material in the lunar soil test tube, and use a vacuum gauge to detect the vacuum degree signal and give it to the controller to monitor whether the vacuum degree meets the standard, preventing the influence on the water escape effect;

[0018] 3. By evacuating the test tube with a corner valve flange, the influence of the air in the pipeline on the water in the test tube with a corner valve flange can be eliminated;

[0019] 4. By using the heat preservation component to contain the refrigerant to refrigerate the lunar soil test tube and the test tube with a corner valve flange, the water vapor in the test tube with a corner valve flange can be transferred to the lunar soil test tube, and the water content of the prepared simulated lunar soil is accurate;

[0020] 5. By introducing low-temperature nitrogen gas into the glove box to discharge the gas in the glove box, and then by removing the lunar soil test tube and the corner valve as a whole from the four-way connector, sealing them and putting them into the transfer composite component for transfer, the influence of air impurities in the glove box on the lunar soil finished product can be prevented. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0022] Figure 1 is a schematic structural diagram of a vacuum drying water molecule gas-phase deposition water-containing simulated lunar soil preparation and transfer composite device described in the present invention;

[0023] Figure 2 is a front view of a vacuum drying water molecule gas-phase deposition water-containing simulated lunar soil preparation and transfer composite device described in the present invention;

[0024] Figure 3 This is a schematic structural diagram of the transfer composite component of the present invention.

[0025] Data acquisition system 1; computer 11; humidity sensor 12; temperature sensor 13; gas detector 14; vacuum system 2; vacuum pump 21; suction pipe 22; vacuum gauge 23; vacuum baffle valve 25; four-way connector 31; lunar soil test tube 311; angle valve 32; pipette 33; support frame 34; thermos 35; alcohol blowtorch 36; glove box 37; inlet valve 371; outlet valve 372; transfer composite component 4; incubator 41; liquid nitrogen tank 42; liquid nitrogen tank cover 44; flange test tube with angle valve 5. Specific embodiments

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. It should be noted that, without conflict, the embodiments and features in the embodiments of the present invention can be combined with each other. The described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0027] Referring to the accompanying drawings to illustrate this embodiment, a vacuum drying water molecule vapor deposition water-containing simulated lunar soil preparation and transfer composite device includes a data acquisition system 1, a vacuum system 2, a vacuum gauge 23, a vacuum baffle valve 25, a four-way connector 31, a lunar soil test tube assembly, a titration assembly, a heat preservation assembly, a heating assembly, a glove box 37, an inlet valve 371, an outlet valve 372, a transfer composite component 4, and a flange test tube with angle valve 5. The four-way connector 31 is arranged in the glove box 37. The four-way connector 31 has three open ends and one closed end. Vacuum baffle valves 25 are arranged on the corresponding pipelines of the three open ends. The first open end of the four-way connector 31 is communicated with the lunar soil test tube assembly, and a heating assembly is arranged below the lunar soil test tube assembly. The second open end of the four-way connector 31 is communicated with the flange test tube with angle valve 5. The third open end of the four-way connector 31 is communicated with the negative pressure open end of the vacuum system 2. The vacuum gauge 23 is arranged in the closed end of the four-way connector 31. The inlet valve 371 and the outlet valve 372 are arranged on the wall surface of the glove box 37. The titration assembly, the heat preservation assembly, and the transfer composite component 4 are all arranged in the glove box 37. The titration assembly is used to titrate a corresponding amount of water into the flange test tube with angle valve 5 according to the target water content of the lunar soil in the lunar soil test tube assembly. The heat preservation assembly is used to contain the refrigerant. The data acquisition system 1 is electrically connected to the vacuum gauge 23. The data acquisition system 1 is used to collect and display the humidity, temperature, gas composition in the glove box 37, and the vacuum degree data in the four-way connector 31. The transfer composite component 4 is used to transfer the lunar soil test tube assembly after the simulated lunar soil is prepared.

[0028] In this embodiment, the data acquisition system 1 includes a computer 11, a humidity sensor 12, a temperature sensor 13, a gas detector 14 and a controller. The humidity sensor 12, the temperature sensor 13 and the vacuum gauge 23 are all electrically connected to the controller, and the controller is electrically connected to the computer 11. The humidity sensor 12 is used to detect the humidity inside the glove box 37. There are two temperature sensors 13, which are respectively used to detect the temperatures of the lunar soil test tube 311 and the test tube with angle valve flange 5. The gas detector 14 is used to detect the gas components inside the glove box 37. The signals of the humidity sensor 12, the temperature sensor 13, the gas detector 14 and the vacuum gauge 23 are collected by the controller and displayed on the computer 11, which is convenient for observing the data and adjusting the test process according to the data.

[0029] In this embodiment, the vacuum system 2 includes a vacuum pump 21 and an extraction pipe 22. The vacuum pump 21 is connected to the third opening end of the four-way connector 31 through the extraction pipe 22, which facilitates the vacuum pumping work through the vacuum pump 21.

[0030] In this embodiment, the transfer and composite assembly 4 includes a heat preservation box 41, a liquid nitrogen bucket 42 and a liquid nitrogen bucket cover 44. The liquid nitrogen bucket 42 is arranged inside the heat preservation box 41, and the liquid nitrogen bucket cover 44 is arranged at the upper end of the liquid nitrogen bucket 42. By means of the liquid nitrogen bucket 42 containing liquid nitrogen, the whole lunar soil test tube assembly containing the prepared simulated lunar soil can be put into the liquid nitrogen bucket 42 for transfer.

[0031] In this embodiment, the four-way connector 31 is connected to the support frame 34, and the base of the support frame 34 is fixed on the bottom plate of the glove box 37, which is convenient for disassembling and installing the four-way connector 31.

[0032] In this embodiment, the heat preservation assembly is a thermos cup 35, which provides heat preservation effect and conducts liquid nitrogen cold bath on the lunar soil test tube 311 and the test tube with angle valve flange 5 after containing liquid nitrogen.

[0033] In this embodiment, the lunar soil test tube assembly includes a lunar soil test tube 311 and an angle valve 32. The lunar soil test tube 311 is connected to the angle valve 32, and the angle valve 32 is connected to the first opening end of the four-way connector 31. The angle valve 32 can control the opening and closing of the lunar soil test tube 311 and can be closed when necessary to prevent the exchange of gas components between the lunar soil test tube 311 and the outside.

[0034] In this embodiment, the heating assembly is an alcohol blowtorch 36, which can provide gradient heating. Cooperating with the vacuum adsorption of the vacuum pump 21, it can completely dry the water in the simulated lunar soil in the lunar soil test tube 311 and facilitate the escape of water.

[0035] In this embodiment, the inlet valve 371 and the outlet valve 372 are arranged on the left and right side end faces of the glove box 37. The inlet valve 371 is arranged at a lower position on the corresponding side end face and is externally connected to a low-temperature nitrogen gas pipeline at -50°C. The outlet valve 372 is arranged at a higher position on the corresponding side end face, facilitating the introduction of low-temperature nitrogen gas at the inlet valve 371. Then, the low-temperature nitrogen gas will gradually evacuate the gas in the glove box 37, preventing the gas components in the glove box 37 from affecting the lunar soil components during the transfer process of the lunar soil finished product.

[0036] In this embodiment, the titration assembly is a pipette 33, and the micro-volume constant volume water setting range of the pipette is from 0.5 to 10 μL, with high precision.

[0037] Simulation of the preparation and transfer process of lunar soil:

[0038] Weigh the corresponding mass of the nominal simulated lunar soil using a high-precision electronic scale, place it in the lunar soil test tube 311, and install it at the first open end of the four-way connector 31 through the angle valve 32. Then, turn on the vacuum baffle valve of the pipeline corresponding to the first open end and close the vacuum baffle valve of the pipeline corresponding to the second open end, so that the lunar soil test tube 311 is connected to the vacuum pump 21.

[0039] Then, light the alcohol blowtorch 36 to heat the lunar soil test tube 311 and simultaneously use the vacuum pump 21 to perform vacuum adsorption on the lunar soil test tube 311, extracting vacuum until it fluctuates in the range of 19 to 22 Pa. After observing that the temperature sensor 13 shows a stable value between 750 and 820°C, close the vacuum baffle valve of the pipeline corresponding to the first open end and the vacuum pump 21.

[0040] Then, remove the alcohol blowtorch 36 and let the lunar soil test tube 311 cool naturally to the ambient temperature. During this period, use the pipette 33 to extract a certain amount of ultrapure water corresponding to the target moisture content of the simulated lunar soil and titrate it into the angle-valve flange test tube 5. Then, install the angle-valve flange test tube 5 at the second open end of the four-way connector 31.

[0041] Then, open the vacuum baffle valve of the pipeline corresponding to the second open end of the four-way connector 31 and use the vacuum pump 21 to evacuate for 20 to 30 minutes. After that, close all the vacuum baffle valves and the vacuum pump 21.

[0042] Then, introduce low-temperature nitrogen gas at -50°C into the glove box 37 for 30 minutes, observe the readings of the humidity sensor 12, temperature sensor 13, and gas detector 14 of the data acquisition system 1, and determine the degree of removal of the water vapor content in the glove box 37 environment. When the hydrogen, oxygen, and water vapor contents in the glove box are respectively lower than 0.1%, place a thermos cup 35 filled with liquid nitrogen under each of the lunar soil test tube 311 and the angle-valve flange test tube 5, and measure the temperatures of the lunar soil test tube 311 and the angle-valve flange test tube 5. After stabilizing at -170°C to -186°C, continue the liquid nitrogen bath for 60 minutes.

[0043] Then, remove the liquid nitrogen bath below the flange test tube 5 with the angle valve, and open the vacuum baffle valves of the pipelines corresponding to the first opening end and the second opening end of the four-way connector 31, so that the water vapor in the flange test tube 5 with the angle valve moves into the lunar soil test tube 311 for cold trap adsorption. The liquid nitrogen bath below the lunar soil test tube 311 continues to be maintained for 60 minutes, and finally, the vapor condensate ice lunar soil water ice is made.

[0044] Then, close the angle valve 32 of the lunar soil test tube 311, and then disassemble the lunar soil test tube 311 and the angle valve 32 as a whole. Install them in the liquid nitrogen bucket 42 for liquid nitrogen bath and cover the liquid nitrogen bucket lid 44. Place the liquid nitrogen bucket 42 in the incubator 41 for heat preservation, and leave it for transfer.

[0045] The embodiments of the present invention disclosed above are only used to help illustrate the present invention. The embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. According to the content of this specification, many modifications and variations can be made. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present invention, so that those skilled in the art can understand and utilize the present invention well.

Claims

1. A composite device for preparing and transferring a water-containing simulated lunar soil by vacuum drying and water molecule vapor deposition, characterized in that: It includes a data acquisition system (1), a vacuum system (2), a vacuum gauge (23), a vacuum baffle valve (25), a four-way connector (31), a lunar soil test tube assembly, a titration assembly, a heat preservation assembly, a heating assembly, a glove box (37), an inlet valve (371), an outlet valve (372), a transfer composite assembly (4) and a corner valve flange test tube (5). The four-way connector (31) is arranged inside the glove box (37). The four-way connector (31) has three open ends and one closed end. Vacuum baffle valves (25) are arranged on the corresponding pipelines of the three open ends. The first open end of the four-way connector (31) is communicated with the lunar soil test tube assembly, and a heating assembly is arranged below the lunar soil test tube assembly. The second open end of the four-way connector (31) is communicated with the corner valve flange test tube (5). The third open end of the four-way connector (31) is communicated with the negative pressure open end of the vacuum system (2). The vacuum gauge (23) is arranged inside the closed end of the four-way connector (31). The inlet valve (371) and the outlet valve (372) are arranged on the wall surface of the glove box (37). The titration assembly, the heat preservation assembly and the transfer composite assembly (4) are all arranged inside the glove box (37). The titration assembly is used to titrate a corresponding amount of water into the corner valve flange test tube (5) according to the target moisture content of the lunar soil in the lunar soil test tube assembly. The heat preservation assembly is used to contain a refrigerant. The data acquisition system (1) is electrically connected with the vacuum gauge (23). The data acquisition system (1) is used to collect and display the humidity, temperature, gas composition inside the glove box (37) and the vacuum degree data inside the four-way connector (31). The transfer composite assembly (4) is used to transfer the lunar soil test tube assembly after preparing the simulated lunar soil.

2. The composite device for preparing and transferring the water-containing simulated lunar soil by vacuum drying and water molecule vapor deposition according to claim 1, wherein: The data acquisition system (1) includes a computer (11), a humidity sensor (12), a temperature sensor (13), a gas detector (14) and a controller. The humidity sensor (12), the temperature sensor (13) and the vacuum gauge (23) are all electrically connected with the controller. The controller is electrically connected with the computer (11). The humidity sensor (12) is used to detect the humidity inside the glove box (37). There are two temperature sensors (13). The two temperature sensors (13) are respectively used to detect the temperatures of the lunar soil test tube (311) and the corner valve flange test tube (5). The gas detector (14) is used to detect the gas composition inside the glove box (37).

3. A composite device for preparing and transferring a water-containing simulated lunar soil by vacuum drying water molecule vapor deposition according to claim 1 or 2, characterized in that: The vacuum system (2) includes a vacuum pump (21) and an exhaust pipe (22). The vacuum pump (21) is communicated with the third open end of the four-way connector (31) through the exhaust pipe (22).

4. A composite device for preparing and transferring a water-containing simulated lunar soil by vacuum drying water molecule vapor deposition according to claim 3, characterized in that: The transfer composite assembly (4) includes a heat preservation box (41), a liquid nitrogen tank (42) and a liquid nitrogen tank cover (44). The liquid nitrogen tank (42) is arranged inside the heat preservation box (41). The liquid nitrogen tank cover (44) is arranged at the upper end of the liquid nitrogen tank (42).

5. A composite device for preparing and transferring a water-containing simulated lunar soil by vacuum drying and water molecule vapor deposition according to claim 1, 2 or 4, characterized in that: The four-way connector (31) is connected with a support frame (34). The base of the support frame (34) is fixed on the bottom plate of the glove box (37).

6. A composite device for preparing and transferring a water-containing simulated lunar soil by vacuum drying and water molecule vapor deposition according to claim 5, characterized in that: The heat preservation assembly is a thermos cup (35).

7. A composite device for preparing and transferring a water-containing simulated lunar soil by vacuum drying water molecule vapor deposition according to claim 5, characterized in that: The described lunar soil test tube assembly includes a lunar soil test tube (311) and an angle valve (32). The lunar soil test tube (311) is connected to the angle valve (32), and the angle valve (32) is communicated with the first opening end of a four-way connector (31).

8. A composite device for preparing and transferring a vacuum-dried water molecule vapor deposition water-containing simulated lunar soil, according to claim 1, 2, 4, 6 or 7, characterized in that: The described heating assembly is an alcohol blowtorch (36).

9. The composite device for preparing and transferring the water-containing simulated lunar soil by vacuum drying water molecule vapor deposition according to claim 8, wherein: The inlet valve (371) and the outlet valve (372) are arranged on the left and right side end faces of the glove box (37). The inlet valve (371) is arranged at a position close to the lower part of the corresponding side end face and is externally connected to a -50°C low-temperature nitrogen gas pipeline, and the outlet valve (372) is arranged at a position close to the upper part of the corresponding side end face.

10. A composite device for preparing and transferring a water-containing simulated lunar soil by vacuum drying water molecule vapor deposition according to claim 8, characterized in that: The described titration assembly is a pipette (33).

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